STM32 入门教程（江科大教材）#笔记2

3-4按键控制LED

/** LED.c**/
#include "stm32f10x.h"                  // Device headervoid LED_Init(void)
{/*开启时钟*/RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);		//开启GPIOA的时钟/*GPIO初始化*/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);						//将PA1和PA2引脚初始化为推挽输出/*设置GPIO初始化后的默认电平*/GPIO_SetBits(GPIOA, GPIO_Pin_1 | GPIO_Pin_2);				//设置PA1和PA2引脚为高电平
}/*** 函    数：LED1开启* 参    数：无* 返 回 值：无*/
void LED1_ON(void)
{GPIO_ResetBits(GPIOA, GPIO_Pin_1);		//设置PA1引脚为低电平
}/*** 函    数：LED1关闭* 参    数：无* 返 回 值：无*/
void LED1_OFF(void)
{GPIO_SetBits(GPIOA, GPIO_Pin_1);		//设置PA1引脚为高电平
}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}
}/*** 函    数：LED2开启* 参    数：无* 返 回 值：无*/
void LED2_ON(void)
{GPIO_ResetBits(GPIOA, GPIO_Pin_2);		//设置PA2引脚为低电平
}/*** 函    数：LED2关闭* 参    数：无* 返 回 值：无*/
void LED2_OFF(void)
{GPIO_SetBits(GPIOA, GPIO_Pin_2);		//设置PA2引脚为高电平
}/*** 函    数：LED2状态翻转* 参    数：无* 返 回 值：无*/
void LED2_Turn(void)
{if (GPIO_ReadOutputDataBit(GPIOA, GPIO_Pin_2) == 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_2);               		//则设置PA2引脚为高电平}                                                  else                                               		//否则，即当前引脚输出高电平{                                                  GPIO_ResetBits(GPIOA, GPIO_Pin_2);             		//则设置PA2引脚为低电平}
}

/**Key.c**/
#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"void Key_Init(void)
{/*开启时钟*/RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);		//开启GPIOB的时钟/*GPIO初始化*/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);						//将PB1和PB11引脚初始化为上拉输入
}/*** 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;		//定义变量，默认键码值为0if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1) == 0)			//读PB1输入寄存器的状态，如果为0，则代表按键1按下{Delay_ms(20);											//延时消抖while (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1) == 0);	//等待按键松手Delay_ms(20);											//延时消抖KeyNum = 1;												//置键码为1}if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_11) == 0)			//读PB11输入寄存器的状态，如果为0，则代表按键2按下{Delay_ms(20);											//延时消抖while (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_11) == 0);	//等待按键松手Delay_ms(20);											//延时消抖KeyNum = 2;												//置键码为2}return KeyNum;			//返回键码值，如果没有按键按下，所有if都不成立，则键码为默认值0
}

/**main.c**/
#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "LED.h"
#include "Key.h"
uint8_t KeyNum;		//定义用于接收按键键码的变量int main(void)
{/*模块初始化*/LED_Init();		//LED初始化Key_Init();		//按键初始化while (1){KeyNum = Key_GetNum();		//获取按键键码if (KeyNum == 1)			//按键1按下{LED1_Turn();			//LED1翻转}if (KeyNum == 2)			//按键2按下{LED2_Turn();			//LED2翻转}}
}

3-5光敏传感器控制蜂鸣器

/*buzzer.c*/
#include "stm32f10x.h"                  // Device headervoid Buzzer_Init(void)
{/*开启时钟*/RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);		//开启GPIOB的时钟/*GPIO初始化*/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);						//将PB12引脚初始化为推挽输出/*设置GPIO初始化后的默认电平*/GPIO_SetBits(GPIOB, GPIO_Pin_12);							//设置PB12引脚为高电平
}void Buzzer_ON(void)
{GPIO_ResetBits(GPIOB, GPIO_Pin_12);		//设置PB12引脚为低电平
}/*** 函    数：蜂鸣器关闭* 参    数：无* 返 回 值：无*/
void Buzzer_OFF(void)
{GPIO_SetBits(GPIOB, GPIO_Pin_12);		//设置PB12引脚为高电平
}void Buzzer_Turn(void)
{if (GPIO_ReadOutputDataBit(GPIOB, 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PB12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PB12引脚为低电平}
}
/*lightsensor*/
#include "stm32f10x.h"                  // Device headervoid LightSensor_Init(void)
{/*开启时钟*/RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);		//开启GPIOB的时钟/*GPIO初始化*/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);						//将PB13引脚初始化为上拉输入
}uint8_t LightSensor_Get(void)
{return GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_13);			//返回PB13输入寄存器的状态
}
/*main.c*/
#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "Buzzer.h"
#include "LightSensor.h"int main(void)
{/*模块初始化*/Buzzer_Init();			//蜂鸣器初始化LightSensor_Init();		//光敏传感器初始化while (1){if (LightSensor_Get() == 1)		//如果当前光敏输出1{Buzzer_ON();				//蜂鸣器开启}else							//否则{Buzzer_OFF();				//蜂鸣器关闭}}
}

4-1 OLED调试工具

OLED（Organic Light Emitting Diode）：有机发光二极管

OLED显示屏：性能优异的新型显示屏，具有功耗低、相应速度快、宽视角、轻薄柔韧等特点

0.96寸OLED模块：小巧玲珑、占用接口少、简单易用，是电子设计中非常常见的显示屏模块

供电：3~5.5V，通信协议：I2C/SPI，分辨率：128*64

三种调试方式

OLED的驱动函数

 

/**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);
}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);
}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();
}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();
}
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
}
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);}}
}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}
}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;
}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');}
}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');}
}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');}}
}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');}
}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
}
/**main.c**/
#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "OLED.h"int main(void)
{/*模块初始化*/OLED_Init();		//OLED初始化/*OLED显示*/OLED_ShowChar(1, 1, 'A');				//1行1列显示字符AOLED_ShowString(1, 3, "HelloWorld!");	//1行3列显示字符串HelloWorld!OLED_ShowNum(2, 1, 12345, 5);			//2行1列显示十进制数字12345，长度为5OLED_ShowSignedNum(2, 7, -66, 2);		//2行7列显示有符号十进制数字-66，长度为2OLED_ShowHexNum(3, 1, 0xAA55, 4);		//3行1列显示十六进制数字0xA5A5，长度为4OLED_ShowBinNum(4, 1, 0xAA55, 16);		//4行1列显示二进制数字0xA5A5，长度为16//C语言无法直接写出二进制数字，故需要用十六进制表示while (1){}
}