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){}
}