一、STM32工程模板
Library文件夹放置各种库,固定不修改。
- //main.c
- #include "stm32f10x.h" // Device header
- int main(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOC, &GPIO_InitStructure);
- GPIO_SetBits(GPIOC, GPIO_Pin_13);
- // GPIO_ResetBits(GPIOC, GPIO_Pin_13);
- while(1)
- {
-
- }
- }
复制代码 stlink和stm32连线:
SWDIO->SWIO
GND->GND
SWCLK->SWCLK
3.3V->3V3
二、GPIO输出与输入
GPIO输出
2.1 LED闪烁
添加Delay函数和main.c
- //Delay.h
- #ifndef __DELAY_H
- #define __DELAY_H
- void Delay_us(uint32_t us);
- void Delay_ms(uint32_t ms);
- void Delay_s(uint32_t s);
- #endif
- //Delay.c
- #include "stm32f10x.h"
- /**
- * @brief 微秒级延时
- * @param xus 延时时长,范围:0~233015
- * @retval 无
- */
- void Delay_us(uint32_t xus)
- {
- SysTick->LOAD = 72 * xus; //设置定时器重装值
- SysTick->VAL = 0x00; //清空当前计数值
- SysTick->CTRL = 0x00000005; //设置时钟源为HCLK,启动定时器
- while(!(SysTick->CTRL & 0x00010000)); //等待计数到0
- SysTick->CTRL = 0x00000004; //关闭定时器
- }
- /**
- * @brief 毫秒级延时
- * @param xms 延时时长,范围:0~4294967295
- * @retval 无
- */
- void Delay_ms(uint32_t xms)
- {
- while(xms--)
- {
- Delay_us(1000);
- }
- }
-
- /**
- * @brief 秒级延时
- * @param xs 延时时长,范围:0~4294967295
- * @retval 无
- */
- void Delay_s(uint32_t xs)
- {
- while(xs--)
- {
- Delay_ms(1000);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- int main(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA,&GPIO_InitStructure);
-
- while(1)
- {
- GPIO_ResetBits(GPIOA, GPIO_Pin_0);
- Delay_ms(500);
- GPIO_SetBits(GPIOA, GPIO_Pin_0);
- Delay_ms(500);
-
- GPIO_WriteBit(GPIOA, GPIO_Pin_0,Bit_RESET);
- Delay_ms(500);
- GPIO_WriteBit(GPIOA, GPIO_Pin_0,Bit_SET);
- Delay_ms(500);
-
- GPIO_WriteBit(GPIOA, GPIO_Pin_0,(BitAction)0);
- Delay_ms(500);
- GPIO_WriteBit(GPIOA, GPIO_Pin_0,(BitAction)1);
- Delay_ms(500);
- }
- }
复制代码 2.2 LED流水灯
- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- int main(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA,&GPIO_InitStructure);
-
- while(1)
- {
- GPIO_Write(GPIOA, ~0x0001); //0000 0000 0000 0001
- Delay_ms(100);
- GPIO_Write(GPIOA, ~0x0002); //0000 0000 0000 0010
- Delay_ms(100);
- GPIO_Write(GPIOA, ~0x0004); //0000 0000 0000 0100
- Delay_ms(100);
- GPIO_Write(GPIOA, ~0x0008); //0000 0000 0000 1000
- Delay_ms(100);
- GPIO_Write(GPIOA, ~0x0010); //0000 0000 0001 0000
- Delay_ms(100);
- GPIO_Write(GPIOA, ~0x0020); //0000 0000 0010 0000
- Delay_ms(100);
- GPIO_Write(GPIOA, ~0x0040); //0000 0000 0100 0000
- Delay_ms(100);
- GPIO_Write(GPIOA, ~0x0080); //0000 0000 1000 0000
- Delay_ms(100);
- }
- }
复制代码 2.3 蜂鸣器
- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- int main(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOB,&GPIO_InitStructure);
-
- while(1)
- {
- GPIO_ResetBits(GPIOB, GPIO_Pin_12);
- Delay_ms(100);
- GPIO_SetBits(GPIOB, GPIO_Pin_12);
- Delay_ms(100);
- GPIO_ResetBits(GPIOB, GPIO_Pin_12);
- Delay_ms(100);
- GPIO_SetBits(GPIOB, GPIO_Pin_12);
- Delay_ms(700);
- }
- }
复制代码 GPIO输入
2.4 按键控制LED
利用到两个LED和两个按键,将这两部门模块化放入Hardware文件夹下。
实现:按键1和2分别控制LED1和2开关。
引脚:LED1 -> PA1,LED2 -> PA2,按键1 -> PB1,按键2 -> PB11<。
- //Key.h
- #ifndef __KEY_H__
- #define __KEY_H__
- void Key_Init(void);
- uint8_t Key_GetNum(void);
- #endif
- //Key.c
- #include "stm32f10x.h" // Device header
- #include "Delay.H"
- void Key_Init(void)
- {
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_11;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOB,&GPIO_InitStructure);
- }
- /**
- * 函 数:按键获取键码
- * 参 数:无
- * 返 回 值:按下按键的键码值,范围:0~2,返回0代表没有按键按下
- * 注意事项:此函数是阻塞式操作,当按键按住不放时,函数会卡住,直到按键松手
- */
- uint8_t Key_GetNum(void)
- {
- uint8_t KeyNum = 0;
- if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) == 0)
- {
- Delay_ms(20);
- while(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) == 0);
- Delay_ms(20);
- KeyNum = 1;
- }
- if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_11) == 0)
- {
- Delay_ms(20);
- while(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_11) == 0);
- Delay_ms(20);
- KeyNum = 2;
- }
- return KeyNum;
- }
复制代码- //LED.h
- #ifndef __LED_H__
- #define __LED_H__
- void LED_Init(void);
- void LED1_ON(void);
- void LED1_OFF(void);
- void LED2_ON(void);
- void LED2_OFF(void);
- void LED1_Turn(void);
- void LED2_Turn(void);
- #endif
- //LED.c
- #include "stm32f10x.h" // Device header
- void LED_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- GPIO_SetBits(GPIOA,GPIO_Pin_1 | GPIO_Pin_2);
- }
- void LED1_ON(void)
- {
- GPIO_ResetBits(GPIOA,GPIO_Pin_1);
- }
- void LED1_OFF(void)
- {
- GPIO_SetBits(GPIOA,GPIO_Pin_1);
- }
- void LED1_Turn(void)
- {
- if(GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_1) == 0) //获取输出寄存器的状态,如果当前引脚输出低电平
- {
- GPIO_SetBits(GPIOA,GPIO_Pin_1); //则设置PA1引脚为高电平
- }
- else //否则,即当前引脚输出高电平
- {
- GPIO_ResetBits(GPIOA,GPIO_Pin_1); //则设置PA1引脚为低电平
- }
- }
- void LED2_ON(void)
- {
- GPIO_ResetBits(GPIOA,GPIO_Pin_2);
- }
- void LED2_OFF(void)
- {
- GPIO_SetBits(GPIOA,GPIO_Pin_2);
- }
- void LED2_Turn(void)
- {
- if(GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_2) == 0)
- {
- GPIO_SetBits(GPIOA,GPIO_Pin_2);
- }
- else{
- GPIO_ResetBits(GPIOA,GPIO_Pin_2);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "LED.h"
- #include "Key.H"
- uint8_t KeyNum;
- int main(void)
- {
- LED_Init();
- Key_Init();
-
- while(1)
- {
- KeyNum = Key_GetNum();
- if(KeyNum == 1)
- {
- LED1_Turn();
- }
- if(KeyNum == 2)
- {
- LED2_Turn();
- }
- }
- }
复制代码 2.5 光敏传感器控制蜂鸣器
利用到光敏传感器和蜂鸣器,将这两部门模块化放入Hardware文件夹下。
实现:遮住光敏传感器,蜂鸣器响。
引脚:蜂鸣器PB12,光敏传感器PB13。
- //Buzzer.h
- #ifndef __BUZZER_H__
- #define __BUZZER_H__
- void Buzzer_Init(void);
- void Buzzer_ON(void);
- void Buzzer_OFF(void);
- void Buzzer_Turn(void);
- #endif
- //Buzzer.c
- #include "stm32f10x.h" // Device header
- void Buzzer_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- GPIO_SetBits(GPIOA,GPIO_Pin_12);
- }
- void Buzzer_ON(void)
- {
- GPIO_ResetBits(GPIOB,GPIO_Pin_12);
- }
- void Buzzer_OFF(void)
- {
- GPIO_SetBits(GPIOB,GPIO_Pin_12);
- }
- void Buzzer_Turn(void)
- {
- if(GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_12) == 0) //获取输出寄存器的状态,如果当前引脚输出低电平
- {
- GPIO_SetBits(GPIOB,GPIO_Pin_12); //则设置PA1引脚为高电平
- }
- else //否则,即当前引脚输出高电平
- {
- GPIO_ResetBits(GPIOB,GPIO_Pin_12); //则设置PA1引脚为低电平
- }
- }
复制代码- //LightSensor.h
- #ifndef __LIGHT_SENSOR_H__
- #define __LIGHT_SENSOR_H__
- void LightSensor_Init(void);
- uint8_t LightSensor_Get(void);
- #endif
- //LightSensor.c
- #include "stm32f10x.h" // Device header
- void LightSensor_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- }
- uint8_t LightSensor_Get(void)
- {
- return GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_13);
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "LED.h"
- #include "Key.H"
- #include "Buzzer.H"
- #include "LightSensor.H"
- int main(void)
- {
- Buzzer_Init();
- LightSensor_Init();
- while(1)
- {
- if(LightSensor_Get() == 1)
- {
- Buzzer_ON();
- }
- else
- {
- Buzzer_OFF();
- }
- }
- }
复制代码 三、OLED
3.1 OLED显示屏

实现:OLED的基本显示。
引脚:SCL -> PB8,SDA -> PB9。(4针OLED)
- //OLED.h
- #ifndef __OLED_H
- #define __OLED_H
- void OLED_Init(void);
- void OLED_Clear(void);
- void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char);
- void OLED_ShowString(uint8_t Line, uint8_t Column, char *String);
- void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
- void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length);
- void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
- void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
- #endif
- //OLED.c
- #include "stm32f10x.h"
- #include "OLED_Font.h"
- /*引脚配置*/
- #define OLED_W_SCL(x) GPIO_WriteBit(GPIOB, GPIO_Pin_8, (BitAction)(x))
- #define OLED_W_SDA(x) GPIO_WriteBit(GPIOB, GPIO_Pin_9, (BitAction)(x))
- /*引脚初始化*/
- void OLED_I2C_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- OLED_W_SCL(1);
- OLED_W_SDA(1);
- }
- /**
- * @brief I2C开始
- * @param 无
- * @retval 无
- */
- void OLED_I2C_Start(void)
- {
- OLED_W_SDA(1);
- OLED_W_SCL(1);
- OLED_W_SDA(0);
- OLED_W_SCL(0);
- }
- /**
- * @brief I2C停止
- * @param 无
- * @retval 无
- */
- void OLED_I2C_Stop(void)
- {
- OLED_W_SDA(0);
- OLED_W_SCL(1);
- OLED_W_SDA(1);
- }
- /**
- * @brief I2C发送一个字节
- * @param Byte 要发送的一个字节
- * @retval 无
- */
- void OLED_I2C_SendByte(uint8_t Byte)
- {
- uint8_t i;
- for (i = 0; i < 8; i++)
- {
- OLED_W_SDA(!!(Byte & (0x80 >> i)));
- OLED_W_SCL(1);
- OLED_W_SCL(0);
- }
- OLED_W_SCL(1); //额外的一个时钟,不处理应答信号
- OLED_W_SCL(0);
- }
- /**
- * @brief OLED写命令
- * @param Command 要写入的命令
- * @retval 无
- */
- void OLED_WriteCommand(uint8_t Command)
- {
- OLED_I2C_Start();
- OLED_I2C_SendByte(0x78); //从机地址
- OLED_I2C_SendByte(0x00); //写命令
- OLED_I2C_SendByte(Command);
- OLED_I2C_Stop();
- }
- /**
- * @brief OLED写数据
- * @param Data 要写入的数据
- * @retval 无
- */
- void OLED_WriteData(uint8_t Data)
- {
- OLED_I2C_Start();
- OLED_I2C_SendByte(0x78); //从机地址
- OLED_I2C_SendByte(0x40); //写数据
- OLED_I2C_SendByte(Data);
- OLED_I2C_Stop();
- }
- /**
- * @brief OLED设置光标位置
- * @param Y 以左上角为原点,向下方向的坐标,范围:0~7
- * @param X 以左上角为原点,向右方向的坐标,范围:0~127
- * @retval 无
- */
- void OLED_SetCursor(uint8_t Y, uint8_t X)
- {
- OLED_WriteCommand(0xB0 | Y); //设置Y位置
- OLED_WriteCommand(0x10 | ((X & 0xF0) >> 4)); //设置X位置高4位
- OLED_WriteCommand(0x00 | (X & 0x0F)); //设置X位置低4位
- }
- /**
- * @brief OLED清屏
- * @param 无
- * @retval 无
- */
- void OLED_Clear(void)
- {
- uint8_t i, j;
- for (j = 0; j < 8; j++)
- {
- OLED_SetCursor(j, 0);
- for(i = 0; i < 128; i++)
- {
- OLED_WriteData(0x00);
- }
- }
- }
- /**
- * @brief OLED显示一个字符
- * @param Line 行位置,范围:1~4
- * @param Column 列位置,范围:1~16
- * @param Char 要显示的一个字符,范围:ASCII可见字符
- * @retval 无
- */
- void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char)
- {
- uint8_t i;
- OLED_SetCursor((Line - 1) * 2, (Column - 1) * 8); //设置光标位置在上半部分
- for (i = 0; i < 8; i++)
- {
- OLED_WriteData(OLED_F8x16[Char - ' '][i]); //显示上半部分内容
- }
- OLED_SetCursor((Line - 1) * 2 + 1, (Column - 1) * 8); //设置光标位置在下半部分
- for (i = 0; i < 8; i++)
- {
- OLED_WriteData(OLED_F8x16[Char - ' '][i + 8]); //显示下半部分内容
- }
- }
- /**
- * @brief OLED显示字符串
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param String 要显示的字符串,范围:ASCII可见字符
- * @retval 无
- */
- void OLED_ShowString(uint8_t Line, uint8_t Column, char *String)
- {
- uint8_t i;
- for (i = 0; String[i] != '\0'; i++)
- {
- OLED_ShowChar(Line, Column + i, String[i]);
- }
- }
- /**
- * @brief OLED次方函数
- * @retval 返回值等于X的Y次方
- */
- uint32_t OLED_Pow(uint32_t X, uint32_t Y)
- {
- uint32_t Result = 1;
- while (Y--)
- {
- Result *= X;
- }
- return Result;
- }
- /**
- * @brief OLED显示数字(十进制,正数)
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param Number 要显示的数字,范围:0~4294967295
- * @param Length 要显示数字的长度,范围:1~10
- * @retval 无
- */
- void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
- {
- uint8_t i;
- for (i = 0; i < Length; i++)
- {
- OLED_ShowChar(Line, Column + i, Number / OLED_Pow(10, Length - i - 1) % 10 + '0');
- }
- }
- /**
- * @brief OLED显示数字(十进制,带符号数)
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param Number 要显示的数字,范围:-2147483648~2147483647
- * @param Length 要显示数字的长度,范围:1~10
- * @retval 无
- */
- void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length)
- {
- uint8_t i;
- uint32_t Number1;
- if (Number >= 0)
- {
- OLED_ShowChar(Line, Column, '+');
- Number1 = Number;
- }
- else
- {
- OLED_ShowChar(Line, Column, '-');
- Number1 = -Number;
- }
- for (i = 0; i < Length; i++)
- {
- OLED_ShowChar(Line, Column + i + 1, Number1 / OLED_Pow(10, Length - i - 1) % 10 + '0');
- }
- }
- /**
- * @brief OLED显示数字(十六进制,正数)
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param Number 要显示的数字,范围:0~0xFFFFFFFF
- * @param Length 要显示数字的长度,范围:1~8
- * @retval 无
- */
- void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
- {
- uint8_t i, SingleNumber;
- for (i = 0; i < Length; i++)
- {
- SingleNumber = Number / OLED_Pow(16, Length - i - 1) % 16;
- if (SingleNumber < 10)
- {
- OLED_ShowChar(Line, Column + i, SingleNumber + '0');
- }
- else
- {
- OLED_ShowChar(Line, Column + i, SingleNumber - 10 + 'A');
- }
- }
- }
- /**
- * @brief OLED显示数字(二进制,正数)
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param Number 要显示的数字,范围:0~1111 1111 1111 1111
- * @param Length 要显示数字的长度,范围:1~16
- * @retval 无
- */
- void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
- {
- uint8_t i;
- for (i = 0; i < Length; i++)
- {
- OLED_ShowChar(Line, Column + i, Number / OLED_Pow(2, Length - i - 1) % 2 + '0');
- }
- }
- /**
- * @brief OLED初始化
- * @param 无
- * @retval 无
- */
- void OLED_Init(void)
- {
- uint32_t i, j;
-
- for (i = 0; i < 1000; i++) //上电延时
- {
- for (j = 0; j < 1000; j++);
- }
-
- OLED_I2C_Init(); //端口初始化
-
- OLED_WriteCommand(0xAE); //关闭显示
-
- OLED_WriteCommand(0xD5); //设置显示时钟分频比/振荡器频率
- OLED_WriteCommand(0x80);
-
- OLED_WriteCommand(0xA8); //设置多路复用率
- OLED_WriteCommand(0x3F);
-
- OLED_WriteCommand(0xD3); //设置显示偏移
- OLED_WriteCommand(0x00);
-
- OLED_WriteCommand(0x40); //设置显示开始行
-
- OLED_WriteCommand(0xA1); //设置左右方向,0xA1正常 0xA0左右反置
-
- OLED_WriteCommand(0xC8); //设置上下方向,0xC8正常 0xC0上下反置
- OLED_WriteCommand(0xDA); //设置COM引脚硬件配置
- OLED_WriteCommand(0x12);
-
- OLED_WriteCommand(0x81); //设置对比度控制
- OLED_WriteCommand(0xCF);
- OLED_WriteCommand(0xD9); //设置预充电周期
- OLED_WriteCommand(0xF1);
- OLED_WriteCommand(0xDB); //设置VCOMH取消选择级别
- OLED_WriteCommand(0x30);
- OLED_WriteCommand(0xA4); //设置整个显示打开/关闭
- OLED_WriteCommand(0xA6); //设置正常/倒转显示
- OLED_WriteCommand(0x8D); //设置充电泵
- OLED_WriteCommand(0x14);
- OLED_WriteCommand(0xAF); //开启显示
-
- OLED_Clear(); //OLED清屏
- }
复制代码 字库:
- //OLED_Font.h
- #ifndef __OLED_FONT_H
- #define __OLED_FONT_H
- /*OLED字模库,宽8像素,高16像素*/
- const uint8_t OLED_F8x16[][16]=
- {
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0
-
- 0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,
- 0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//! 1
-
- 0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//" 2
-
- 0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,
- 0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//# 3
-
- 0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,
- 0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//$ 4
-
- 0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,
- 0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//% 5
-
- 0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,
- 0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//& 6
-
- 0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//' 7
-
- 0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,
- 0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//( 8
-
- 0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,
- 0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//) 9
-
- 0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,
- 0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//* 10
-
- 0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,
- 0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+ 11
-
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
- 0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//, 12
-
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
- 0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//- 13
-
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
- 0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//. 14
-
- 0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,
- 0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,/// 15
-
- 0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,
- 0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//0 16
-
- 0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,
- 0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//1 17
-
- 0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,
- 0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//2 18
-
- 0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,
- 0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//3 19
-
- 0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,
- 0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//4 20
-
- 0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,
- 0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//5 21
-
- 0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,
- 0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//6 22
-
- 0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,
- 0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//7 23
-
- 0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,
- 0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//8 24
-
- 0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,
- 0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//9 25
-
- 0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,
- 0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//: 26
-
- 0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,
- 0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//; 27
-
- 0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,
- 0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//< 28
-
- 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,
- 0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//= 29
-
- 0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,
- 0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,//> 30
-
- 0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,
- 0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//? 31
-
- 0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,
- 0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@ 32
-
- 0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,
- 0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A 33
-
- 0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,
- 0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B 34
-
- 0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,
- 0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C 35
-
- 0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,
- 0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D 36
-
- 0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,
- 0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E 37
-
- 0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,
- 0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F 38
-
- 0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,
- 0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G 39
-
- 0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,
- 0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H 40
-
- 0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,
- 0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I 41
-
- 0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,
- 0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J 42
-
- 0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,
- 0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K 43
-
- 0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,
- 0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L 44
-
- 0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,
- 0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M 45
-
- 0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,
- 0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N 46
-
- 0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,
- 0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O 47
-
- 0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,
- 0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P 48
-
- 0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,
- 0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q 49
-
- 0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,
- 0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R 50
-
- 0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,
- 0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S 51
-
- 0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,
- 0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T 52
-
- 0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,
- 0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U 53
-
- 0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,
- 0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V 54
-
- 0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,
- 0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W 55
-
- 0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,
- 0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X 56
-
- 0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,
- 0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y 57
-
- 0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,
- 0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z 58
-
- 0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,
- 0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[ 59
-
- 0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,
- 0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\ 60
-
- 0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,
- 0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//] 61
-
- 0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^ 62
-
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
- 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_ 63
-
- 0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//` 64
-
- 0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
- 0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a 65
-
- 0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,
- 0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b 66
-
- 0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,
- 0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c 67
-
- 0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,
- 0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d 68
-
- 0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
- 0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e 69
-
- 0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,
- 0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f 70
-
- 0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,
- 0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g 71
-
- 0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,
- 0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h 72
-
- 0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,
- 0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i 73
-
- 0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,
- 0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j 74
-
- 0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,
- 0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k 75
-
- 0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,
- 0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l 76
-
- 0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,
- 0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m 77
-
- 0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,
- 0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n 78
-
- 0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
- 0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o 79
-
- 0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,
- 0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p 80
-
- 0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,
- 0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q 81
-
- 0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,
- 0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r 82
-
- 0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,
- 0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s 83
-
- 0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,
- 0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t 84
-
- 0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,
- 0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u 85
-
- 0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,
- 0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v 86
-
- 0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,
- 0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w 87
-
- 0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,
- 0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x 88
-
- 0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,
- 0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y 89
-
- 0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,
- 0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z 90
-
- 0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,
- 0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{ 91
-
- 0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,
- 0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//| 92
-
- 0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,
- 0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//} 93
-
- 0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,
- 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~ 94
- };
- #endif
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- int main(void)
- {
- OLED_Init();
- OLED_ShowChar(1,1,'A');
- OLED_ShowString(1,3,"Hello!");
- OLED_ShowNum(2,1,12345,5);
- OLED_ShowSignedNum(2,7,-66,2);
- OLED_ShowHexNum(3,1,0xAA55,4);
- OLED_ShowBinNum(4,1,0xAA55,16);
-
- while(1)
- {
-
- }
- }
复制代码 四、EXIT外部停止
4.1 对射式红外传感器计次

实现:利用对射式红外传感器进行计次 。下降沿触发,每当遮挡物离开红外,则计次1。
关键文件:模块化CounterSensor、main.c
引脚:DO -> PB14。
- //CounterSensor.h
- #ifndef __CountSensor_H__
- #define __CountSensor_H__
- void CountSensor_Init(void);
- uint16_t CountSensor_Get(void);
- #endif
- //CounterSensor.c
- #include "stm32f10x.h" // Device header
- uint16_t CountSensor_Count;
- void CountSensor_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource14);//数据选择器
-
- EXTI_InitTypeDef EXTI_InitStructure;
- EXTI_InitStructure.EXTI_Line = EXTI_Line14;
- EXTI_InitStructure.EXTI_LineCmd = ENABLE;
- EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
- EXTI_Init(&EXTI_InitStructure);
-
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
-
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
- NVIC_Init(&NVIC_InitStructure);
- }
- uint16_t CountSensor_Get(void)
- {
- return CountSensor_Count;
- }
- void EXTI15_10_IRQHandler(void)
- {
- if(EXTI_GetITStatus(EXTI_Line14) == SET)
- {
- CountSensor_Count ++;
- EXTI_ClearITPendingBit(EXTI_Line14);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "CountSensor.H"
- int main(void)
- {
- OLED_Init();
- CountSensor_Init();
- OLED_ShowString(1,1,"Count:");
-
- while(1)
- {
- OLED_ShowNum(1,7,CountSensor_Get(),5);
- }
- }
复制代码 4.2 旋转编码器计次

实现:利用旋转编码器进行计次 。向左旋转数值递减,向右旋转递增。
关键文件:模块化Encoder、main.c
引脚:A -> PB0,B -> PB1。
- //Encoder.h
- #ifndef __ENCODER_H__
- #define __ENCODER_H__
- void Encoder_Init(void);
- int16_t Encode_Get(void);
- #endif
- //Encoder.c
- #include "stm32f10x.h" // Device header
- int16_t Encoder_Count;
- void Encoder_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource0);//数据选择器
- GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource1);
-
- EXTI_InitTypeDef EXTI_InitStructure;
- EXTI_InitStructure.EXTI_Line = EXTI_Line0 | EXTI_Line1;
- EXTI_InitStructure.EXTI_LineCmd = ENABLE;
- EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
- EXTI_Init(&EXTI_InitStructure);
-
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
-
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
- NVIC_Init(&NVIC_InitStructure);
-
- NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
- NVIC_Init(&NVIC_InitStructure);
- }
- int16_t Encode_Get(void)
- {
- int16_t Temp;
- Temp = Encoder_Count;
- Encoder_Count = 0;
- return Temp;
- }
- void EXTI0_IRQHandler(void)
- {
- if(EXTI_GetITStatus(EXTI_Line0) == SET)
- {
- if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) == 0)
- {
- Encoder_Count--;
- }
- EXTI_ClearITPendingBit(EXTI_Line0);
- }
- }
- void EXTI1_IRQHandler(void)
- {
- if(EXTI_GetITStatus(EXTI_Line1) == SET)
- {
- if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_0) == 0)
- {
- Encoder_Count++;
- }
- EXTI_ClearITPendingBit(EXTI_Line1);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Encoder.h"
- int16_t Num;
- int main(void)
- {
- OLED_Init();
- Encoder_Init();
- OLED_ShowString(1,1,"Num:");
-
- while(1)
- {
- Num+= Encode_Get();
- OLED_ShowSignedNum(1,5,Num,5);
- }
- }
复制代码 五、TIM定时器
5.1 定时器定时停止

在System文件夹进行Timer模块化。
实现:定时器计时,在OLED上显示,每一秒数字增一。
- //Timer.h
- #ifndef __TIMER_H__
- #define __TIMER_H__
- void Timer_Init(void);
- #endif
- //Timer.c
- #include "stm32f10x.h" // Device header
- void Timer_Init(void)
- {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
-
- TIM_InternalClockConfig(TIM2);
-
- TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
- TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseInitStructure.TIM_Period = 10000-1;
- TIM_TimeBaseInitStructure.TIM_Prescaler = 7200-1;
- TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
- TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
-
- TIM_ClearFlag(TIM2,TIM_FLAG_Update);
- TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
-
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
-
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
- NVIC_Init(&NVIC_InitStructure);
-
- TIM_Cmd(TIM2,ENABLE);
- }
- /*
- void TIM2_IRQHandler(void)
- {
- if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
- {
- TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
- }
- }
- */
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Timer.h"
- uint16_t Num;
- int main(void)
- {
- OLED_Init();
- Timer_Init();
- OLED_ShowString(1,1,"Num:");
-
- while(1)
- {
- OLED_ShowNum(1,5,Num,5);
- }
- }
- void TIM2_IRQHandler(void)
- {
- if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
- {
- Num++;
- TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
- }
- }
复制代码 5.2 定时器外部时钟

实现:外接红外对射式传感器,PA0引脚就是TIM2的ETR引脚,在这个引脚输入一个外部时钟。挡光片每遮挡一次红外对射式传感器,CNT加1,加到9,CNT自动清零,同时申请停止,NUM++。CNT和NUM的值在OLED上显示。
引脚:红外对射式传感器DO -> PA0。OLED接法同上。
- //Timer.h
- #ifndef __TIMER_H__
- #define __TIMER_H__
- void Timer_Init(void);
- uint16_t Timer_GetCounter(void);
- #endif
- //Timer.c
- #include "stm32f10x.h" // Device header
- void Timer_Init(void)
- {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA,&GPIO_InitStructure);
-
- TIM_ETRClockMode2Config(TIM2,TIM_ExtTRGPSC_OFF,TIM_ExtTRGPolarity_NonInverted,0x00);
-
- TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
- TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseInitStructure.TIM_Period = 10-1;
- TIM_TimeBaseInitStructure.TIM_Prescaler = 1-1;
- TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
- TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
-
- TIM_ClearFlag(TIM2,TIM_FLAG_Update);
- TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
-
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
-
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
- NVIC_Init(&NVIC_InitStructure);
-
- TIM_Cmd(TIM2,ENABLE);
- }
- uint16_t Timer_GetCounter(void)
- {
- return TIM_GetCounter(TIM2);
- }
- /*
- void TIM2_IRQHandler(void)
- {
- if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
- {
- TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
- }
- }
- */
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Timer.h"
- uint16_t Num;
- int main(void)
- {
- OLED_Init();
- Timer_Init();
- OLED_ShowString(1,1,"Num:");
- OLED_ShowString(2,1,"CNT:");
-
- while(1)
- {
- OLED_ShowNum(1,5,Num,5);
- OLED_ShowNum(2,5,Timer_GetCounter(),5);
- }
- }
- void TIM2_IRQHandler(void)
- {
- if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
- {
- Num++;
- TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
- }
- }
复制代码
5.3 PWM驱动LED呼吸灯

这里模块化PWM。
实现:LED呼吸灯效果。
引脚:LED接到PA0。
- //PWM.h
- #ifndef __PWM_H__
- #define __PWM_H__
- void PWM_Init(void);
- void PWM_SetCompare1(uint16_t Compare);
- #endif
- //PWM.c
- #include "stm32f10x.h" // Device header
- void PWM_Init(void)
- {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
- //重映射,将PA0转移到PA15
- // RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
- // GPIO_PinRemapConfig(GPIO_PartialRemap1_TIM2,ENABLE);
- // GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //GPIO_Pin_15
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- TIM_InternalClockConfig(TIM2);
-
- TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
- TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseInitStructure.TIM_Period = 100-1; //ARR
- TIM_TimeBaseInitStructure.TIM_Prescaler = 720-1; //PSC
- TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
- TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
-
- TIM_OCInitTypeDef TIM_OCInitStructure;
- TIM_OCStructInit(&TIM_OCInitStructure);
- TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
- TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
- TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
- TIM_OCInitStructure.TIM_Pulse = 50; //CCR
- TIM_OC1Init(TIM2, &TIM_OCInitStructure);
-
- TIM_Cmd(TIM2,ENABLE);
- }
- //设置CCR寄存器的值
- void PWM_SetCompare1(uint16_t Compare)
- {
- TIM_SetCompare1(TIM2, Compare);
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "PWM.h"
- uint8_t i;
- int main(void)
- {
- OLED_Init();
- PWM_Init();
-
- while(1)
- {
- for(i=0;i<=100;i++)
- {
- PWM_SetCompare1(i);
- Delay_ms(10);
- }
- for(i=0;i<=100;i++)
- {
- PWM_SetCompare1(100 - i);
- Delay_ms(10);
- }
- }
- }
复制代码 5.4 PWM驱动舵机
增加PWM、Servo的模块化文件,放入Hardware文件夹内。
实现:通过按键,控制舵机旋转不同的角度(从0°-180°,按键每按一次旋转30°),并在OLED上显示当前角度。
引脚:舵机vcc -> STlink的5V,舵机信号引脚(橙色线)-> PA1。按键接在PB1。OLED的SCL-> B8,SDA-> B9。
- //PWM.h
- #ifndef __PWM_H__
- #define __PWM_H__
- void PWM_Init(void);
- void PWM_SetCompare2(uint16_t Compare);
- #endif
- //PWM.c
- #include "stm32f10x.h" // Device header
- void PWM_Init(void)
- {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- TIM_InternalClockConfig(TIM2);
-
- TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
- TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseInitStructure.TIM_Period = 20000-1; //ARR
- TIM_TimeBaseInitStructure.TIM_Prescaler = 72-1; //PSC
- TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
- TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
-
- TIM_OCInitTypeDef TIM_OCInitStructure;
- TIM_OCStructInit(&TIM_OCInitStructure);
- TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
- TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
- TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
- TIM_OCInitStructure.TIM_Pulse = 0; //CCR
- TIM_OC2Init(TIM2, &TIM_OCInitStructure);
-
- TIM_Cmd(TIM2,ENABLE);
- }
- //设置CCR寄存器的值
- void PWM_SetCompare2(uint16_t Compare)
- {
- TIM_SetCompare2(TIM2, Compare);
- }
复制代码- //Servo.h
- #ifndef __SERVO_H__
- #define __SERVO_H__
- void Servo_Init(void);
- void Servo_SetAngle(float Angle);
- #endif
- //Servo.c
- #include "stm32f10x.h" // Device header
- #include "PWM.H"
- void Servo_Init(void)
- {
- PWM_Init();
- }
- void Servo_SetAngle(float Angle)
- {
- PWM_SetCompare2(Angle / 180 * 2000 + 500);
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Servo.h"
- #include "Key.h"
- uint8_t KeyNum;
- float Angle;
- int main(void)
- {
- OLED_Init();
- Servo_Init();
- Key_Init();
-
- OLED_ShowString(1,1,"Angle:");
-
- while(1)
- {
- KeyNum = Key_GetNum();
- if(KeyNum == 1)
- {
- Angle += 30;
- if(Angle > 180)
- {
- Angle = 0;
- }
- }
- Servo_SetAngle(Angle);
- OLED_ShowNum(1,7,Angle,3);
- }
- }
复制代码 5.5 PWM驱动直流电机
模块化Motor。
实现:按键控制直流电机的转动速率与方向。正向从0转到100,然后反向从-100到0。OLED上显示速率的多少。
引脚:
TB6612电机驱动模块:VM -> STLink的5V引脚,VCC -> 电源正,GND -> 电源负,AO1和AO2分别接直流电机的两根线,PWMA -> PA2,AN2 -> PA5,AN1-> PA4,STBY -> 电源正。
按键:PB1。OLED接法同上。
- //PWM.h
- #ifndef __PWM_H__
- #define __PWM_H__
- void PWM_Init(void);
- void PWM_SetCompare3(uint16_t Compare);
- #endif
- //PWM.c
- #include "stm32f10x.h" // Device header
- void PWM_Init(void)
- {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- TIM_InternalClockConfig(TIM2);
-
- TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
- TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseInitStructure.TIM_Period = 100-1; //ARR
- TIM_TimeBaseInitStructure.TIM_Prescaler = 36-1; //PSC
- TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
- TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
-
- TIM_OCInitTypeDef TIM_OCInitStructure;
- TIM_OCStructInit(&TIM_OCInitStructure);
- TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
- TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
- TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
- TIM_OCInitStructure.TIM_Pulse = 50; //CCR
- TIM_OC3Init(TIM2, &TIM_OCInitStructure);
-
- TIM_Cmd(TIM2,ENABLE);
- }
- //设置CCR寄存器的值
- void PWM_SetCompare3(uint16_t Compare)
- {
- TIM_SetCompare3(TIM2, Compare);
- }
复制代码- //Motor.h
- #ifndef __MOTOR_H__
- #define __MOTOR_H__
- void Motor_Init(void);
- void Motor_SetSpeed(int8_t Speed);
- #endif
- //Motor.c
- #include "stm32f10x.h" // Device header
- #include "PWM.H"
- void Motor_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- PWM_Init();
- }
- void Motor_SetSpeed(int8_t Speed)
- {
- if(Speed >= 0)
- {
- GPIO_SetBits(GPIOA, GPIO_Pin_4);
- GPIO_ResetBits(GPIOA, GPIO_Pin_5);
- PWM_SetCompare3(Speed);
- }
- else
- {
- GPIO_ResetBits(GPIOA, GPIO_Pin_4);
- GPIO_SetBits(GPIOA, GPIO_Pin_5);
- PWM_SetCompare3(-Speed);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Motor.h"
- #include "Key.h"
- uint8_t KeyNum;
- int8_t Speed;
- int main(void)
- {
- OLED_Init();
- Motor_Init();
- Key_Init();
-
- OLED_ShowString(1,1,"Speed:");
-
- while(1)
- {
- KeyNum=Key_GetNum();
- if(KeyNum == 1)
- {
- Speed += 20;
- if(Speed >100)
- {
- Speed = -100;
- }
- }
- Motor_SetSpeed(Speed);
- OLED_ShowSignedNum(1,7,Speed,3);
- }
- }
复制代码 5.6 输入捕获模式测频率

创建新的文件模块化IC输入捕获到Hardware文件夹。
实现:PWM模块将待测信号输出到PA0,PA0又通过导线,输入到PA6。PA6是TIM3的通道1,通道1通过输入捕获模块,测量得到频率。OLED不断刷新显示频率。
连线:利用一根飞线PA0 -> PA6
- //PWM.h
- #ifndef __PWM_H__
- #define __PWM_H__
- void PWM_Init(void);
- void PWM_SetCompare1(uint16_t Compare);
- void PWM_SetPrescaler(uint16_t Prescaler);
- #endif
- //PWM.c
- #include "stm32f10x.h" // Device header
- void PWM_Init(void)
- {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- TIM_InternalClockConfig(TIM2);
-
- TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
- TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseInitStructure.TIM_Period = 100-1; //ARR
- TIM_TimeBaseInitStructure.TIM_Prescaler = 720-1; //PSC
- TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
- TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
-
- TIM_OCInitTypeDef TIM_OCInitStructure;
- TIM_OCStructInit(&TIM_OCInitStructure);
- TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
- TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
- TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
- TIM_OCInitStructure.TIM_Pulse = 50; //CCR
- TIM_OC1Init(TIM2, &TIM_OCInitStructure);
-
- TIM_Cmd(TIM2,ENABLE);
- }
- //设置CCR寄存器的值,改变通道1的占空比
- void PWM_SetCompare1(uint16_t Compare)
- {
- TIM_SetCompare1(TIM2, Compare);
- }
- //改变频率PSC
- void PWM_SetPrescaler(uint16_t Prescaler)
- {
- TIM_PrescalerConfig(TIM2, Prescaler,TIM_PSCReloadMode_Immediate);
- }
复制代码- //IC.h
- #ifndef __IC_H__
- #define __IC_H__
- void IC_Init(void);
- uint16_t IC_GetFreq(void);
- #endif
- //IC.c
- #include "stm32f10x.h" // Device header
- void IC_Init(void)
- {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- TIM_InternalClockConfig(TIM3);
-
- TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
- TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseInitStructure.TIM_Period = 65536 - 1; //ARR
- TIM_TimeBaseInitStructure.TIM_Prescaler = 72 - 1; //PSC
- TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
- TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);
-
- TIM_ICInitTypeDef TIM_ICInitStructure;
- TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
- TIM_ICInitStructure.TIM_ICFilter = 0xF;
- TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
- TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
- TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
- TIM_ICInit(TIM3,&TIM_ICInitStructure);
-
- TIM_SelectInputTrigger(TIM3, TIM_TS_TI1FP1);
- TIM_SelectSlaveMode(TIM3,TIM_SlaveMode_Reset);
-
- TIM_Cmd(TIM3,ENABLE);
- }
- uint16_t IC_GetFreq(void)
- {
- return 1000000 / (TIM_GetCapture1(TIM3) + 1);
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "PWM.h"
- #include "IC.h"
- int main(void)
- {
- OLED_Init();
- PWM_Init();
- IC_Init();
-
- OLED_ShowString(1,1,"Freq:00000Hz");
-
- PWM_SetPrescaler(720 -1); //Freq = 72M / (PSC + 1) / 100
- PWM_SetCompare1(50); //Duty = CCR / 100
-
- while(1)
- {
- OLED_ShowNum(1,6,IC_GetFreq(),5);
- }
- }
复制代码 5.7 PWMI模式测频率占空比
本小节在 5.6 的基础上修改 IC 代码,除此外无变更。
实现:测占空比,与频率一起在OLED上刷新显示。
- //IC.h
- #ifndef __IC_H__
- #define __IC_H__
- void IC_Init(void);
- uint16_t IC_GetFreq(void);
- uint16_t IC_GetDuty(void);
- #endif
- //IC.c
- #include "stm32f10x.h" // Device header
- void IC_Init(void)
- {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- TIM_InternalClockConfig(TIM3);
-
- TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
- TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseInitStructure.TIM_Period = 65536 - 1; //ARR
- TIM_TimeBaseInitStructure.TIM_Prescaler = 72 - 1; //PSC
- TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
- TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);
-
- TIM_ICInitTypeDef TIM_ICInitStructure;
- TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
- TIM_ICInitStructure.TIM_ICFilter = 0xF;
- TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
- TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
- TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
- TIM_PWMIConfig(TIM3,&TIM_ICInitStructure);
-
- TIM_SelectInputTrigger(TIM3, TIM_TS_TI1FP1);
- TIM_SelectSlaveMode(TIM3,TIM_SlaveMode_Reset);
-
- TIM_Cmd(TIM3,ENABLE);
- }
- //获取频率
- uint16_t IC_GetFreq(void)
- {
- return 1000000 / (TIM_GetCapture1(TIM3) + 1);
- }
- //获取占空比
- uint16_t IC_GetDuty(void)
- {
- return (TIM_GetCapture2(TIM3) + 1) * 100 / (TIM_GetCapture1(TIM3) + 1);
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "PWM.h"
- #include "IC.h"
- int main(void)
- {
- OLED_Init();
- PWM_Init();
- IC_Init();
-
- OLED_ShowString(1,1,"Freq:00000Hz");
- OLED_ShowString(2,1,"Duty:00%");
-
- PWM_SetPrescaler(720 -1); //Freq = 72M / (PSC + 1) / 100
- PWM_SetCompare1(50); //Duty = CCR / 100
-
- while(1)
- {
- OLED_ShowNum(1,6,IC_GetFreq(),5);
- OLED_ShowNum(2,6,IC_GetDuty(),2);
- }
- }
复制代码 5.8 编码器接口测速
延用 5.1 的代码 ,新增 Encoder 的模块化代码文件。
实现:利用旋转编码器,对旋转速率进行测速。向左旋转为负,反之为正。(着实就是 4.2 的计次,但是添加了清零,每次计次完成都清零,这样就是速率了。)每次在OLED上刷新显示速率,利用main的停止函数而不是Delay。
引脚: 旋转编码器的A -> PA6,B -> PA7。
- //Encoder.h
- #ifndef __ENCODER_H__
- #define __ENCODER_H__
- void Encoder_Init(void);
- int16_t Encoder_Get(void);
- #endif
- //Encoder.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Timer.h"
- #include "Encoder.h"
- int16_t Speed;
- int main(void)
- {
- OLED_Init();
- Timer_Init();
- Encoder_Init();
-
- OLED_ShowString(1,1,"Speed:");
-
- while(1)
- {
- OLED_ShowSignedNum(1, 7, Speed, 5);
- }
- }
- void TIM2_IRQHandler(void)
- {
- if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
- {
- Speed = Encoder_Get();
- TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Timer.h"
- #include "Encoder.h"
- int16_t Speed;
- int main(void)
- {
- OLED_Init();
- Timer_Init();
- Encoder_Init();
-
- OLED_ShowString(1,1,"Speed:");
-
- while(1)
- {
- OLED_ShowSignedNum(1, 7, Speed, 5);
- }
- }
- void TIM2_IRQHandler(void)
- {
- if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
- {
- Speed = Encoder_Get();
- TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
- }
- }
复制代码 六、ADC数模转换器
6.1 AD单通道
延用 3.1 的代码,新增 AD 模块。
实现:AD模数转换。利用电位器,向左拧电压减小,向右宁电压增大。
引脚:电位器三个引脚在上呈三角排列。左边引脚接电源负,右边引脚接电源正,中间引脚接PA0。
- //AD.h
- #ifndef __AD_H__
- #define __AD_H__
- void AD_Init(void);
- uint16_t AD_GetValue(void);
- #endif
- //AD.c
- #include "stm32f10x.h" // Device header
- void AD_Init(void)
- {
- //配置时钟
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
- RCC_ADCCLKConfig(RCC_PCLK2_Div6);
-
- //配置GPIO口
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- //选择输入通道
- ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_55Cycles5);
-
- //ADC初始化(单次转换、非扫描模式)
- ADC_InitTypeDef ADC_InitStructure;
- ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
- ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
- ADC_InitStructure.ADC_ScanConvMode = DISABLE;
- ADC_InitStructure.ADC_NbrOfChannel = 1;
- ADC_Init(ADC1,&ADC_InitStructure);
-
- //开启电源
- ADC_Cmd(ADC1,ENABLE);
-
- //ADC校准
- ADC_ResetCalibration(ADC1);
- while(ADC_GetResetCalibrationStatus(ADC1) == SET);
- ADC_StartCalibration(ADC1);
- while(ADC_GetCalibrationStatus(ADC1) == SET);
- }
- uint16_t AD_GetValue(void)
- {
- ADC_SoftwareStartConvCmd(ADC1,ENABLE); //启动
- while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC) == RESET); //等待
- return ADC_GetConversionValue(ADC1); //读取
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "AD.h"
- uint16_t ADValue;
- float Voltage;
- int main(void)
- {
- OLED_Init();
- AD_Init();
-
- OLED_ShowString(1,1,"ADValue:");
- OLED_ShowString(2,1,"Voltage:0.00V");
-
- while(1)
- {
- ADValue = AD_GetValue();
- Voltage = (float)ADValue / 4095 * 3.3;
-
- OLED_ShowNum(1, 9, ADValue, 4);
- OLED_ShowNum(2, 9, Voltage, 1);
- OLED_ShowNum(2, 11, (uint16_t)(Voltage * 100) % 100, 2);
-
- Delay_ms(100);
- }
- }
复制代码 6.2 AD多通道
实物图:
复制 6.1 文件,电位器不变,新增光敏传感器、热敏传感器、对射式红外传感器。修改AD模块与main函数。
引脚:光敏传感器、热敏传感器、对射式红外传感器的AO引脚分别接PA1、PA2、PA3。VCC都接电源正,GND都接电源负。
- //AD.h
- #ifndef __AD_H__
- #define __AD_H__
- void AD_Init(void);
- uint16_t AD_GetValue(uint8_t ADC_Channel);
- #endif
- //AD.c
- #include "stm32f10x.h" // Device header
- void AD_Init(void)
- {
- //配置时钟
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
- RCC_ADCCLKConfig(RCC_PCLK2_Div6);
-
- //配置GPIO口
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- //ADC初始化(单次转换、非扫描模式)
- ADC_InitTypeDef ADC_InitStructure;
- ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
- ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
- ADC_InitStructure.ADC_ScanConvMode = DISABLE;
- ADC_InitStructure.ADC_NbrOfChannel = 1;
- ADC_Init(ADC1,&ADC_InitStructure);
-
- //开启电源
- ADC_Cmd(ADC1,ENABLE);
-
- //ADC校准
- ADC_ResetCalibration(ADC1);
- while(ADC_GetResetCalibrationStatus(ADC1) == SET);
- ADC_StartCalibration(ADC1);
- while(ADC_GetCalibrationStatus(ADC1) == SET);
- }
- uint16_t AD_GetValue(uint8_t ADC_Channel)
- {
- //选择输入通道
- ADC_RegularChannelConfig(ADC1,ADC_Channel,1,ADC_SampleTime_55Cycles5);
- ADC_SoftwareStartConvCmd(ADC1,ENABLE); //启动
- while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC) == RESET); //等待
- return ADC_GetConversionValue(ADC1); //读取
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "AD.h"
- uint16_t AD0, AD1, AD2, AD3;
- int main(void)
- {
- OLED_Init();
- AD_Init();
-
- OLED_ShowString(1,1,"AD0:");
- OLED_ShowString(2,1,"AD1:");
- OLED_ShowString(3,1,"AD2:");
- OLED_ShowString(4,1,"AD3:");
-
- while(1)
- {
- AD0 = AD_GetValue(ADC_Channel_0);
- AD1 = AD_GetValue(ADC_Channel_1);
- AD2 = AD_GetValue(ADC_Channel_2);
- AD3 = AD_GetValue(ADC_Channel_3);
-
- OLED_ShowNum(1, 5, AD0, 4);
- OLED_ShowNum(2, 5, AD1, 4);
- OLED_ShowNum(3, 5, AD2, 4);
- OLED_ShowNum(4, 5, AD3, 4);
-
- Delay_ms(100);
- }
- }
复制代码 七、DMA数据转运
7.1 DMA数据转运 单通道
复制 3.1 代码,新建 MyDMA 至System文件夹。
和 6.1 的接线相同。
实现:DataA每隔一秒向DataB传送数据,并在OLED更新显示。
- //MyDMA.h
- #ifndef __MYDMA_H__
- #define __MYDMA_H__
- void MyDMA_Init(uint32_t AddrA, uint32_t AddrB, uint16_t Size);
- void MyDMA_Transfer(void);
- #endif
- //MyDMA.c
- #include "stm32f10x.h" // Device header
- uint16_t MyDMA_Size;
- void MyDMA_Init(uint32_t AddrA, uint32_t AddrB, uint16_t Size)
- {
- MyDMA_Size = Size;
-
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
-
- DMA_InitTypeDef DMA_InitStructure;
- DMA_InitStructure.DMA_PeripheralBaseAddr = AddrA;
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
- DMA_InitStructure.DMA_MemoryBaseAddr = AddrB;
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_BufferSize = Size;
- DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
- DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;
- DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
- DMA_Init(DMA1_Channel1, &DMA_InitStructure);
-
- DMA_Cmd(DMA1_Channel1,DISABLE);
- }
- void MyDMA_Transfer(void)
- {
- DMA_Cmd(DMA1_Channel1,DISABLE);
- DMA_SetCurrDataCounter(DMA1_Channel1,MyDMA_Size);
- DMA_Cmd(DMA1_Channel1,ENABLE);
-
- while(DMA_GetFlagStatus(DMA1_FLAG_TC1) == RESET);
- DMA_ClearFlag(DMA1_FLAG_TC1);
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "MyDMA.h"
- uint8_t DataA[] = {0x01, 0x02, 0x03, 0x04};
- uint8_t DataB[] = {0, 0, 0, 0};
- int main(void)
- {
- OLED_Init();
-
- MyDMA_Init((uint32_t)DataA,(uint32_t)DataB,4);
-
- OLED_ShowString(1,1,"DataA");
- OLED_ShowString(3,1,"DataB");
- OLED_ShowHexNum(1,8,(uint32_t)DataA,8);
- OLED_ShowHexNum(3,8,(uint32_t)DataB,8);
-
- OLED_ShowHexNum(2,1,DataA[0],2);
- OLED_ShowHexNum(2,4,DataA[1],2);
- OLED_ShowHexNum(2,7,DataA[2],2);
- OLED_ShowHexNum(2,10,DataA[3],2);
- OLED_ShowHexNum(4,1,DataB[0],2);
- OLED_ShowHexNum(4,4,DataB[1],2);
- OLED_ShowHexNum(4,7,DataB[2],2);
- OLED_ShowHexNum(4,10,DataB[3],2);
-
- while(1)
- {
- DataA[0] ++;
- DataA[1] ++;
- DataA[2] ++;
- DataA[3] ++;
-
- OLED_ShowHexNum(2,1,DataA[0],2);
- OLED_ShowHexNum(2,4,DataA[1],2);
- OLED_ShowHexNum(2,7,DataA[2],2);
- OLED_ShowHexNum(2,10,DataA[3],2);
- OLED_ShowHexNum(4,1,DataB[0],2);
- OLED_ShowHexNum(4,4,DataB[1],2);
- OLED_ShowHexNum(4,7,DataB[2],2);
- OLED_ShowHexNum(4,10,DataB[3],2);
-
- Delay_ms(1000);
-
- MyDMA_Transfer();
-
- OLED_ShowHexNum(2,1,DataA[0],2);
- OLED_ShowHexNum(2,4,DataA[1],2);
- OLED_ShowHexNum(2,7,DataA[2],2);
- OLED_ShowHexNum(2,10,DataA[3],2);
- OLED_ShowHexNum(4,1,DataB[0],2);
- OLED_ShowHexNum(4,4,DataB[1],2);
- OLED_ShowHexNum(4,7,DataB[2],2);
- OLED_ShowHexNum(4,10,DataB[3],2);
-
- Delay_ms(1000);
- }
- }
复制代码
7.2 DMA+AD多通道
复制 6.2 代码。
与 6.2 实现结果相同,但利用了DMA数据转运。
- //AD.h
- #ifndef __AD_H__
- #define __AD_H__
- extern uint16_t AD_Value[4];
- void AD_Init(void);
- #endif
- //AD.c
- #include "stm32f10x.h" // Device header
- uint16_t AD_Value[4];
- void AD_Init(void)
- {
- //配置时钟
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
-
- RCC_ADCCLKConfig(RCC_PCLK2_Div6);
-
- //配置GPIO口
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_55Cycles5);
- ADC_RegularChannelConfig(ADC1,ADC_Channel_1,2,ADC_SampleTime_55Cycles5);
- ADC_RegularChannelConfig(ADC1,ADC_Channel_2,3,ADC_SampleTime_55Cycles5);
- ADC_RegularChannelConfig(ADC1,ADC_Channel_3,4,ADC_SampleTime_55Cycles5);
-
- //ADC初始化(单次转换、非扫描模式)
- ADC_InitTypeDef ADC_InitStructure;
- ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
- ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
- ADC_InitStructure.ADC_ScanConvMode = ENABLE;
- ADC_InitStructure.ADC_NbrOfChannel = 4;
- ADC_Init(ADC1,&ADC_InitStructure);
-
- DMA_InitTypeDef DMA_InitStructure;
- DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
- DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)AD_Value;
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_BufferSize = 4;
- DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
- DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
- DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
- DMA_Init(DMA1_Channel1, &DMA_InitStructure);
-
- DMA_Cmd(DMA1_Channel1,ENABLE);
- ADC_DMACmd(ADC1,ENABLE);
- ADC_Cmd(ADC1,ENABLE);
-
- //ADC校准
- ADC_ResetCalibration(ADC1);
- while(ADC_GetResetCalibrationStatus(ADC1) == SET);
- ADC_StartCalibration(ADC1);
- while(ADC_GetCalibrationStatus(ADC1) == SET);
-
- ADC_SoftwareStartConvCmd(ADC1,ENABLE); //启动
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "AD.h"
- int main(void)
- {
- OLED_Init();
- AD_Init();
-
- OLED_ShowString(1,1,"AD0:");
- OLED_ShowString(2,1,"AD1:");
- OLED_ShowString(3,1,"AD2:");
- OLED_ShowString(4,1,"AD3:");
-
- while(1)
- {
- OLED_ShowNum(1, 5, AD_Value[0], 4);
- OLED_ShowNum(2, 5, AD_Value[1], 4);
- OLED_ShowNum(3, 5, AD_Value[2], 4);
- OLED_ShowNum(4, 5, AD_Value[3], 4);
-
- Delay_ms(100);
- }
- }
复制代码 八、USART串口协议
8.1 串口发送
复制 3.1 代码,加上Serial文件。
实现:串口发送数据。 每复位一次,串口发送一次数据。
接线:STLink和USB转TTL同时插在电脑USB上 。
USB转TTL:TX -> PA10, RX -> PA9。STLink接线同上。
在串口助手中的最终显示结果如下:

- //Serial.h
- #ifndef __SERIAL_H__
- #define __SERIAL_H__
- #include <stdio.h>
- void Serial_Init(void);
- void Serial_SendByte(uint8_t Byte);
- void Serial_SendArray(uint8_t *Array,uint16_t Length);
- void Serial_SendString(char *String);
- void Serial_SendNumber(uint32_t Number,uint8_t Length);
- void Serial_Printf(char *format,...);
- #endif
- //Serial.c
- #include "stm32f10x.h" // Device header
- #include <stdio.h>
- #include <stdarg.h>
- void Serial_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- USART_InitTypeDef USART_InitStructure;
- USART_InitStructure.USART_BaudRate = 9600;
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_InitStructure.USART_Mode = USART_Mode_Tx;
- USART_InitStructure.USART_Parity = USART_Parity_No;
- USART_InitStructure.USART_StopBits = USART_StopBits_1;
- USART_InitStructure.USART_WordLength = USART_WordLength_8b;
- USART_Init(USART1,&USART_InitStructure);
-
- USART_Cmd(USART1,ENABLE);
- }
- void Serial_SendByte(uint8_t Byte)
- {
- USART_SendData(USART1,Byte);
- while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
- }
- void Serial_SendArray(uint8_t *Array,uint16_t Length)
- {
- uint16_t i;
- for(i = 0;i < Length; i ++)
- {
- Serial_SendByte(Array[i]);
- }
- }
- void Serial_SendString(char *String)
- {
- uint8_t i;
- for(i = 0;String[i] != '\0'; i ++)
- {
- Serial_SendByte(String[i]);
- }
- }
- uint32_t Serial_Pow(uint32_t X,uint32_t Y)
- {
- uint32_t Result = 1;
- while(Y --)
- {
- Result *= X;
- }
- return Result;
- }
- void Serial_SendNumber(uint32_t Number,uint8_t Length)
- {
- uint8_t i;
- for(i = 0;i < Length; i ++)
- {
- Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
- }
- }
- int fputc(int ch,FILE *f)
- {
- Serial_SendByte(ch);
- return ch;
- }
- //可变参数
- void Serial_Printf(char *format,...)
- {
- char String[100];
- va_list arg;
- va_start(arg, format);
- vsprintf(String, format, arg);
- va_end(arg);
- Serial_SendString(String);
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Serial.h"
- int main(void)
- {
- OLED_Init();
- Serial_Init();
-
- Serial_SendByte(0x41);
-
- uint8_t MyArray[] = {0x42, 0x43, 0x44, 0x45};
- Serial_SendArray(MyArray,4);
-
- Serial_SendString("\r\nNum1=");
-
- Serial_SendNumber(111,3);
-
- printf("\r\nNum2=%d",222);
-
- char String[100];
- sprintf(String,"\r\nNum3=%d",333);
- Serial_SendString(String);
-
- Serial_Printf("\r\nNum4=%d",444);
- Serial_Printf("\r\n");
-
- while(1)
- {
-
- }
- }
复制代码 8.2 串口发送+接收
复制 8.1 串口发送代码,接线相同不更改。
实现:停止接收。在串口助手发送数据,成功接收,并在OLED上也显示。目前只支持一个字节的接收。

- //Serial.h
- #ifndef __SERIAL_H__
- #define __SERIAL_H__
- #include <stdio.h>
- void Serial_Init(void);
- void Serial_SendByte(uint8_t Byte);
- void Serial_SendArray(uint8_t *Array,uint16_t Length);
- void Serial_SendString(char *String);
- void Serial_SendNumber(uint32_t Number,uint8_t Length);
- void Serial_Printf(char *format,...);
- uint8_t Serial_GetRxFlag(void);
- uint8_t Serial_GetRxData(void);
- #endif
- //Serial.c
- #include "stm32f10x.h" // Device header
- #include <stdio.h>
- #include <stdarg.h>
- uint8_t Serial_RxData;
- uint8_t Serial_RxFlag;
- void Serial_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- USART_InitTypeDef USART_InitStructure;
- USART_InitStructure.USART_BaudRate = 9600;
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
- USART_InitStructure.USART_Parity = USART_Parity_No;
- USART_InitStructure.USART_StopBits = USART_StopBits_1;
- USART_InitStructure.USART_WordLength = USART_WordLength_8b;
- USART_Init(USART1,&USART_InitStructure);
-
- USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
-
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
-
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
- NVIC_Init(&NVIC_InitStructure);
-
- USART_Cmd(USART1,ENABLE);
- }
- void Serial_SendByte(uint8_t Byte)
- {
- USART_SendData(USART1,Byte);
- while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
- }
- void Serial_SendArray(uint8_t *Array,uint16_t Length)
- {
- uint16_t i;
- for(i = 0;i < Length; i ++)
- {
- Serial_SendByte(Array[i]);
- }
- }
- void Serial_SendString(char *String)
- {
- uint8_t i;
- for(i = 0;String[i] != '\0'; i ++)
- {
- Serial_SendByte(String[i]);
- }
- }
- uint32_t Serial_Pow(uint32_t X,uint32_t Y)
- {
- uint32_t Result = 1;
- while(Y --)
- {
- Result *= X;
- }
- return Result;
- }
- void Serial_SendNumber(uint32_t Number,uint8_t Length)
- {
- uint8_t i;
- for(i = 0;i < Length; i ++)
- {
- Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
- }
- }
- int fputc(int ch,FILE *f)
- {
- Serial_SendByte(ch);
- return ch;
- }
- //可变参数
- void Serial_Printf(char *format,...)
- {
- char String[100];
- va_list arg;
- va_start(arg, format);
- vsprintf(String, format, arg);
- va_end(arg);
- Serial_SendString(String);
- }
- uint8_t Serial_GetRxFlag(void)
- {
- if(Serial_RxFlag == 1)
- {
- Serial_RxFlag = 0;
- return 1;
- }
- return 0;
- }
- uint8_t Serial_GetRxData(void)
- {
- return Serial_RxData;
- }
- void USART1_IRQHandler(void)
- {
- if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
- {
- Serial_RxData = USART_ReceiveData(USART1);
- Serial_RxFlag = 1;
- USART_ClearITPendingBit(USART1, USART_IT_RXNE);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Serial.h"
- uint8_t RxData;
- int main(void)
- {
- OLED_Init();
- OLED_ShowString(1, 1, "RxData:");
-
- Serial_Init();
-
- while(1)
- {
- if(Serial_GetRxFlag() == 1)
- {
- RxData = Serial_GetRxData();
- Serial_SendByte(RxData);
- OLED_ShowHexNum(1, 8, RxData, 2);
- }
- }
- }
复制代码 8.3 串口收发HEX数据包

复制 8.2 的代码。
接线:STLink和USB转TTL照常接。PB1接按键。LED长脚接电源正,短脚接PA1。
实现:串口收发Hex数据包。按下按键发送,串口接受区显示接收的数据包TxPacket。串口助手发送数据包,会在OLED上显示接收的数据包RxPacket。

- //Serial.h
- #ifndef __SERIAL_H__
- #define __SERIAL_H__
- #include <stdio.h>
- extern uint8_t Serial_TxPacket[];
- extern uint8_t Serial_RxPacket[];
- void Serial_Init(void);
- void Serial_SendByte(uint8_t Byte);
- void Serial_SendArray(uint8_t *Array,uint16_t Length);
- void Serial_SendString(char *String);
- void Serial_SendNumber(uint32_t Number,uint8_t Length);
- void Serial_Printf(char *format,...);
- void Serial_SendPacket(void);
- uint8_t Serial_GetRxFlag(void);
- #endif
- //Serial.c
- #include "stm32f10x.h" // Device header
- #include <stdio.h>
- #include <stdarg.h>
- uint8_t Serial_TxPacket[4];
- uint8_t Serial_RxPacket[4];
- uint8_t Serial_RxFlag;
- void Serial_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- USART_InitTypeDef USART_InitStructure;
- USART_InitStructure.USART_BaudRate = 9600;
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
- USART_InitStructure.USART_Parity = USART_Parity_No;
- USART_InitStructure.USART_StopBits = USART_StopBits_1;
- USART_InitStructure.USART_WordLength = USART_WordLength_8b;
- USART_Init(USART1,&USART_InitStructure);
-
- USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
-
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
-
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
- NVIC_Init(&NVIC_InitStructure);
-
- USART_Cmd(USART1,ENABLE);
- }
- void Serial_SendByte(uint8_t Byte)
- {
- USART_SendData(USART1,Byte);
- while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
- }
- void Serial_SendArray(uint8_t *Array,uint16_t Length)
- {
- uint16_t i;
- for(i = 0;i < Length; i ++)
- {
- Serial_SendByte(Array[i]);
- }
- }
- void Serial_SendString(char *String)
- {
- uint8_t i;
- for(i = 0;String[i] != '\0'; i ++)
- {
- Serial_SendByte(String[i]);
- }
- }
- uint32_t Serial_Pow(uint32_t X,uint32_t Y)
- {
- uint32_t Result = 1;
- while(Y --)
- {
- Result *= X;
- }
- return Result;
- }
- void Serial_SendNumber(uint32_t Number,uint8_t Length)
- {
- uint8_t i;
- for(i = 0;i < Length; i ++)
- {
- Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
- }
- }
- int fputc(int ch,FILE *f)
- {
- Serial_SendByte(ch);
- return ch;
- }
- //可变参数
- void Serial_Printf(char *format,...)
- {
- char String[100];
- va_list arg;
- va_start(arg, format);
- vsprintf(String, format, arg);
- va_end(arg);
- Serial_SendString(String);
- }
- void Serial_SendPacket(void)
- {
- Serial_SendByte(0xFF);
- Serial_SendArray(Serial_TxPacket,4);
- Serial_SendByte(0xFE);
- }
- uint8_t Serial_GetRxFlag(void)
- {
- if(Serial_RxFlag == 1)
- {
- Serial_RxFlag = 0;
- return 1;
- }
- return 0;
- }
- void USART1_IRQHandler(void)
- {
- static uint8_t RxState = 0;
- static uint8_t pRxPacket = 0;
- if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
- {
- uint8_t RxData = USART_ReceiveData(USART1);
-
- if(RxState == 0)
- {
- if(RxData == 0xFF)
- {
- RxState = 1;
- pRxPacket = 0;
- }
- }
- else if(RxState == 1)
- {
- Serial_RxPacket[pRxPacket] = RxData;
- pRxPacket ++;
- if(pRxPacket >= 4)
- {
- RxState =2;
- }
- }
- else if(RxState == 2)
- {
- if(RxData == 0xFE)
- {
- RxState = 0;
- Serial_RxFlag = 1;
- }
- }
- USART_ClearITPendingBit(USART1, USART_IT_RXNE);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Serial.h"
- #include "Key.h"
- uint8_t KeyNum;
- int main(void)
- {
- OLED_Init();
- Key_Init();
- Serial_Init();
-
- OLED_ShowString(1, 1, "TxPacket");
- OLED_ShowString(3, 1, "RxPacket");
-
- Serial_TxPacket[0] = 0x01;
- Serial_TxPacket[1] = 0x02;
- Serial_TxPacket[2] = 0x03;
- Serial_TxPacket[3] = 0x04;
-
- while(1)
- {
- KeyNum = Key_GetNum();
- if(KeyNum == 1)
- {
- Serial_TxPacket[0] ++;
- Serial_TxPacket[1] ++;
- Serial_TxPacket[2] ++;
- Serial_TxPacket[3] ++;
-
- Serial_SendPacket();
-
- OLED_ShowHexNum(2, 1, Serial_TxPacket[0], 2);
- OLED_ShowHexNum(2, 4, Serial_TxPacket[1], 2);
- OLED_ShowHexNum(2, 7, Serial_TxPacket[2], 2);
- OLED_ShowHexNum(2, 10, Serial_TxPacket[3], 2);
- }
- if(Serial_GetRxFlag() == 1)
- {
- OLED_ShowHexNum(4, 1, Serial_RxPacket[0], 2);
- OLED_ShowHexNum(4, 4, Serial_RxPacket[1], 2);
- OLED_ShowHexNum(4, 7, Serial_RxPacket[2], 2);
- OLED_ShowHexNum(4, 10, Serial_RxPacket[3], 2);
- }
- }
- }
复制代码 8.4 串口收发文本数据包
复制 8.3 代码。
实现:串口收发文本数据包。在串口助手发送“@LED_ON(回车)”,LED亮,STM32发送“LED_ON_OK\r\n”。发送“@LED_OFF(回车)”,LED灭,STM32发送“LED_OFF_OK\r\n”。发送其他则显示ERROR_COMMAND

- //Serial.h
- #ifndef __SERIAL_H__
- #define __SERIAL_H__
- #include <stdio.h>
- extern char Serial_RxPacket[];
- extern uint8_t Serial_RxFlag;
- void Serial_Init(void);
- void Serial_SendByte(uint8_t Byte);
- void Serial_SendArray(uint8_t *Array,uint16_t Length);
- void Serial_SendString(char *String);
- void Serial_SendNumber(uint32_t Number,uint8_t Length);
- void Serial_Printf(char *format,...);
- #endif
- //Serial.c
- #include "stm32f10x.h" // Device header
- #include <stdio.h>
- #include <stdarg.h>
- char Serial_RxPacket[100];
- uint8_t Serial_RxFlag;
- void Serial_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- USART_InitTypeDef USART_InitStructure;
- USART_InitStructure.USART_BaudRate = 9600;
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
- USART_InitStructure.USART_Parity = USART_Parity_No;
- USART_InitStructure.USART_StopBits = USART_StopBits_1;
- USART_InitStructure.USART_WordLength = USART_WordLength_8b;
- USART_Init(USART1,&USART_InitStructure);
-
- USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
-
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
-
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
- NVIC_Init(&NVIC_InitStructure);
-
- USART_Cmd(USART1,ENABLE);
- }
- void Serial_SendByte(uint8_t Byte)
- {
- USART_SendData(USART1,Byte);
- while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
- }
- void Serial_SendArray(uint8_t *Array,uint16_t Length)
- {
- uint16_t i;
- for(i = 0;i < Length; i ++)
- {
- Serial_SendByte(Array[i]);
- }
- }
- void Serial_SendString(char *String)
- {
- uint8_t i;
- for(i = 0;String[i] != '\0'; i ++)
- {
- Serial_SendByte(String[i]);
- }
- }
- uint32_t Serial_Pow(uint32_t X,uint32_t Y)
- {
- uint32_t Result = 1;
- while(Y --)
- {
- Result *= X;
- }
- return Result;
- }
- void Serial_SendNumber(uint32_t Number,uint8_t Length)
- {
- uint8_t i;
- for(i = 0;i < Length; i ++)
- {
- Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
- }
- }
- int fputc(int ch,FILE *f)
- {
- Serial_SendByte(ch);
- return ch;
- }
- //可变参数
- void Serial_Printf(char *format,...)
- {
- char String[100];
- va_list arg;
- va_start(arg, format);
- vsprintf(String, format, arg);
- va_end(arg);
- Serial_SendString(String);
- }
- void USART1_IRQHandler(void)
- {
- static uint8_t RxState = 0;
- static uint8_t pRxPacket = 0;
- if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
- {
- uint8_t RxData = USART_ReceiveData(USART1);
-
- if(RxState == 0)
- {
- if(RxData == '@' && Serial_RxFlag == 0)
- {
- RxState = 1;
- pRxPacket = 0;
- }
- }
- else if(RxState == 1)
- {
- if(RxData == '\r')
- {
- RxState =2;
- }
- else
- {
- Serial_RxPacket[pRxPacket] = RxData;
- pRxPacket ++;
- }
- }
- else if(RxState == 2)
- {
- if(RxData == '\n')
- {
- RxState = 0;
- Serial_RxPacket[pRxPacket] = '\0';
- Serial_RxFlag = 1;
- }
- }
- USART_ClearITPendingBit(USART1, USART_IT_RXNE);
- }
- }
复制代码- //main.c
- #include "stm32f10x.h" // Device header
- #include "Delay.h"
- #include "OLED.h"
- #include "Serial.h"
- #include "LED.h"
- #include <string.h>
- int main(void)
- {
- OLED_Init();
- LED_Init();
- Serial_Init();
-
- OLED_ShowString(1, 1, "TxPacket");
- OLED_ShowString(3, 1, "RxPacket");
-
- while(1)
- {
- if(Serial_RxFlag == 1)
- {
- OLED_ShowString(4, 1, " ");
- OLED_ShowString(4, 1, Serial_RxPacket);
-
- if(strcmp(Serial_RxPacket,"LED_ON") == 0)
- {
- LED1_ON();
- Serial_SendString("LED_ON_OK\r\n");
- OLED_ShowString(2, 1, " ");
- OLED_ShowString(2, 1, "LED_ON_OK");
- }
- else if(strcmp(Serial_RxPacket,"LED_OFF") == 0)
- {
- LED1_OFF();
- Serial_SendString("LED_OFF_OK\r\n");
- OLED_ShowString(2, 1, " ");
- OLED_ShowString(2, 1, "LED_OFF_OK");
- }
- else{
- Serial_SendString("ERROR_COMMAND\r\n");
- OLED_ShowString(2, 1, " ");
- OLED_ShowString(2, 1, "ERROR_COMMAND");
- }
- Serial_RxFlag = 0;
- }
- }
- }
复制代码
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