IIC和OLED再认识

 IIC介绍

51是由于芯片功能不齐全，以至于需要软件编写IIC

而STM32芯片足够将IIC配置在硬件当中以至于直接读写即可



忘记了可回顾51的16.IIC 协议 和 OLED_oled,iic通信波特率-CSDN博客

在STM32中使用IIC可以直接调用HAL库的库函数： 

 

 
HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c,uint16_t DevAddress,uint16_t MemAddress,uint16_t MemAddSize,uint8_t *pData,uint16_t Size,uint32_t Timeout)
 
参数一：I2C_HandleTypeDef *hi2c，I2C设备句柄
 
参数二：uint16_t DevAddress，目标器件的地址，七位地址必须左对齐
 
参数三：uint16_t MemAddress，目标器件的目标寄存器地址
 
参数四：uint16_t MemAddSize，目标器件内部寄存器地址数据长度
 
参数五：uint8_t *pData，待写的数据首地址
 
参数六：uint16_t Size，待写的数据长度
 
参数七：uint32_t Timeout，超时时间
 
返回值：HAL_StatusTypeDef，HAL状态（OK，busy，ERROR，TIMEOUT）
 

 

 

硬件介绍
 

同样使用之前用过的OLED，使用的是IIC协议：
 

 

在对51的学习，可以轻易的写出对于OLED写命令和写数据的函数封装：
 

对OLED写命令：
 

void OLED_writecmd(uint8_t dataCmd)
{HAL_I2C_Mem_Write(&hi2c1, 0x78, 0x00, I2C_MEMADD_SIZE_8BIT, &dataCmd, 1, 0xff);
}
 

 对OLED写数据：
 

void OLED_writedata(uint8_t dataData)
{HAL_I2C_Mem_Write(&hi2c1, 0x78, 0x40, I2C_MEMADD_SIZE_8BIT, &dataData, 1, 0xff);
}
 

 在STM32里再次实现OLED的显示
 

假如我选择页寻址模式，显示以下图像的话
 

 

unsigned char image[] = {//使用unsigned可以使得原本从负数到正数的范围扩展到两倍的正数，适用于大量无符号数存在时
/*--  宽度x高度=64x64  64*8*8（16进制）--*/
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0x7F,0x3F,0xBF,0x9F,0xDF,0xDF,0xEF,0xEF,0xEF,0xE7,0xEF,0xEF,
0xFF,0xEF,0xEF,0xFF,0xFF,0xDF,0xDF,0xBF,0xBF,0x7F,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x3F,0xCF,
0xF3,0xF9,0xFC,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFD,0xFB,0xF7,0xEF,
0x9F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x4F,0xF8,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x7F,0xFF,0xFF,0xFF,0xFF,0x5F,0x1F,0x1F,0x1F,0x1F,
0x3F,0x0F,0x3F,0x3F,0xFF,0xBF,0xBF,0xBF,0xFF,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFC,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x32,0x87,0x03,0xD9,
0xFF,0xF9,0x81,0x07,0x01,0x00,0x0F,0x1F,0x11,0x11,0x1F,0x06,0x00,0x00,0x80,0x80,
0x80,0x80,0x80,0x04,0x0F,0x17,0x11,0x17,0x0F,0x06,0x00,0x03,0x80,0xFD,0xFF,0x1F,
0xF3,0x87,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x3F,0x81,0xFC,0xFF,0xFF,0xFF,
0x00,0xFF,0xFF,0xFC,0xF0,0xE0,0xA0,0x60,0x40,0x40,0x40,0x40,0x00,0x83,0x84,0x80,
0x80,0x04,0x02,0xC0,0x40,0x40,0x40,0x20,0xE0,0xF0,0xF0,0xF8,0xFF,0xFF,0xFF,0x00,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x3F,0xC3,0xFC,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xF1,0xBF,0xFF,0xFF,0xFF,0x3F,0x9E,0xCC,0xE8,0xE0,0xE8,0xE9,0xE0,0xCA,0xC8,
0xC8,0xCA,0xC8,0xC9,0xC8,0xC4,0xE6,0x27,0x27,0xE7,0xEF,0xCF,0x8F,0x3F,0xFF,0xFE,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0xC3,0xFC,0xFF,0xCF,0x87,0x03,0x07,0x0F,0x8F,
0x07,0x07,0x03,0x87,0x7F,0xFC,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFD,0xFC,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x81,
0xE1,0xC1,0xA3,0x03,0x01,0x00,0x91,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC0,0x7F,0xFF,0xFF,0xFF,0xFF,0xFC,0xFC,0xFC,0xFE,
0xFF,0xFF,0xFE,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x1F,0x1F,0x0F,
0x0F,0x0F,0x1F,0x1F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
};
 

CubeMX
 

1. 常规配置
 

SYS->Debug->Serial Wire
 

RCC->High Speed Clock(HSE)->Crystal/Ceramic Resonator
 

时钟树HSE、PLLCLK打开，HCLK设置成72MHz
 

打开I2C1，选择I2C:
 

 

2.查看GPIO setting或者原理图，可知 OLED的SCL和SDA应该分别接在 PB6 和 PB7 !
 

3.生成代码
 

 

Keil
 

unsigned char image[] = {
/*--  宽度x高度=64x64  64*8*8（16进制）--*/
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0x7F,0x3F,0xBF,0x9F,0xDF,0xDF,0xEF,0xEF,0xEF,0xE7,0xEF,0xEF,
0xFF,0xEF,0xEF,0xFF,0xFF,0xDF,0xDF,0xBF,0xBF,0x7F,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x3F,0xCF,
0xF3,0xF9,0xFC,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFD,0xFB,0xF7,0xEF,
0x9F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x4F,0xF8,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x7F,0xFF,0xFF,0xFF,0xFF,0x5F,0x1F,0x1F,0x1F,0x1F,
0x3F,0x0F,0x3F,0x3F,0xFF,0xBF,0xBF,0xBF,0xFF,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFC,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x32,0x87,0x03,0xD9,
0xFF,0xF9,0x81,0x07,0x01,0x00,0x0F,0x1F,0x11,0x11,0x1F,0x06,0x00,0x00,0x80,0x80,
0x80,0x80,0x80,0x04,0x0F,0x17,0x11,0x17,0x0F,0x06,0x00,0x03,0x80,0xFD,0xFF,0x1F,
0xF3,0x87,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x3F,0x81,0xFC,0xFF,0xFF,0xFF,
0x00,0xFF,0xFF,0xFC,0xF0,0xE0,0xA0,0x60,0x40,0x40,0x40,0x40,0x00,0x83,0x84,0x80,
0x80,0x04,0x02,0xC0,0x40,0x40,0x40,0x20,0xE0,0xF0,0xF0,0xF8,0xFF,0xFF,0xFF,0x00,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x3F,0xC3,0xFC,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xF1,0xBF,0xFF,0xFF,0xFF,0x3F,0x9E,0xCC,0xE8,0xE0,0xE8,0xE9,0xE0,0xCA,0xC8,
0xC8,0xCA,0xC8,0xC9,0xC8,0xC4,0xE6,0x27,0x27,0xE7,0xEF,0xCF,0x8F,0x3F,0xFF,0xFE,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0xC3,0xFC,0xFF,0xCF,0x87,0x03,0x07,0x0F,0x8F,
0x07,0x07,0x03,0x87,0x7F,0xFC,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFD,0xFC,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x81,
0xE1,0xC1,0xA3,0x03,0x01,0x00,0x91,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC0,0x7F,0xFF,0xFF,0xFF,0xFF,0xFC,0xFC,0xFC,0xFE,
0xFF,0xFF,0xFE,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x1F,0x1F,0x0F,
0x0F,0x0F,0x1F,0x1F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
};void OLED_writecmd(uint8_t dataCmd)
{HAL_I2C_Mem_Write(&hi2c1,0x78,0x00,I2C_MEMADD_SIZE_8BIT,&dataCmd,1,0xff);
}void OLED_writedata(uint8_t data)
{HAL_I2C_Mem_Write(&hi2c1,0x78,0x40,I2C_MEMADD_SIZE_8BIT,&data,1,0xff);}void OLED_Init()
{OLED_writecmd(0xAE);//--display offOLED_writecmd(0x00);//---set low column addressOLED_writecmd(0x10);//---set high column addressOLED_writecmd(0x40);//--set start line address  OLED_writecmd(0xB0);//--set page addressOLED_writecmd(0x81); // contract controlOLED_writecmd(0xFF);//--128   OLED_writecmd(0xA1);//set segment remap OLED_writecmd(0xA6);//--normal / reverseOLED_writecmd(0xA8);//--set multiplex ratio(1 to 64)OLED_writecmd(0x3F);//--1/32 dutyOLED_writecmd(0xC8);//Com scan directionOLED_writecmd(0xD3);//-set display offsetOLED_writecmd(0x00);//OLED_writecmd(0xD5);//set osc divisionOLED_writecmd(0x80);//OLED_writecmd(0xD8);//set area color mode offOLED_writecmd(0x05);//OLED_writecmd(0xD9);//Set Pre-Charge PeriodOLED_writecmd(0xF1);//OLED_writecmd(0xDA);//set com pin configuartionOLED_writecmd(0x12);//OLED_writecmd(0xDB);//set VcomhOLED_writecmd(0x30);//OLED_writecmd(0x8D);//set charge pump enableOLED_writecmd(0x14);//OLED_writecmd(0xAF);//--turn on oled panel		
}void OLED_Clear()
{int i,j;for(i = 0;i<8;i++){OLED_writecmd(0xB0 + i); //page 0 --page7//每个page从列OLED_writecmd(0x00);//选择0列OLED_writecmd(0x10);//选择0列//由于地址会自动偏移，所以只要重复写128次全0，就可以清一个PAGEfor(j = 0;j < 128;j++){OLED_writedata(0x00);}}}void OLED_Pic(unsigned char *image)
{unsigned char i;unsigned int j;for(i = 0;i<8;i++){OLED_writecmd(0xB0 + i); //page 0 --page7//每个page从列OLED_writecmd(0x00);OLED_writecmd(0x10);//0到64列，以此写入0，每写入数据，列地址自动偏移for(j = 64*i;j < 64*(i+1);j++){OLED_writedata(image[j]);}}}int main(void)
{//	1.OLED初始化OLED_Init();OLED_Clear();//2.选择一个位置
//	2.1确认页寻址模式OLED_writecmd(0x20);OLED_writecmd(0x02);
//	2.2选择page0  1011 0000OLED_writecmd(0xB0);OLED_Pic(image);while (1){}}
 

实验效果
 












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参考视频&#xff1a;02 协程_哔哩哔哩_bilibili 
1.协程&#xff1a;&#xff08;不是计算机中真实存在的&#xff0c;人为创造出的概念&#xff09;&#xff0c;也可称为微线程。 
本质是用一个线程在一段代码中来会切换游走的线程&#xff0c;是一种用户态内的上下文切换技术…




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