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STM32 IIC 实验

news 来源：原创 2025/5/20 4:39:21

1.

 可以选择I2C1，也可以选择I2C2，或者同时选择，同时运行

 

配置时钟信号

为节约空间，选择这两个，然后选择GENERATE CODE

二、HAL_I2C_Mem_Write

I2C_HandleTypeDef *hi2c：I2C设备句柄
uint16_t DevAddress：目标器件的地址，七位地址必须左对齐
uint16_t MemAddress：目标器件的目标寄存器地址
uint16_t MemAddSize：目标器件内部寄存器地址数据长度
uint8_t *pData：待写的数据首地址
uint16_t Size：待写的数据长度
uint32_t Timeout：超时时间
返回值： HAL_StatusTypeDef ， HAL 状态（ OK ， busy ， ERROR ， TIMEOUT ）
向OLED写入命令的封装： 
void Oled_Write_Cmd(uint8_t dataCmd)
{
	HAL_I2C_Mem_Write(&hi2c1,0x78,0x00,I2C_MEMADD_SIZE_8BIT,
									&dataCmd,1,0xff);
}
向 OLED 写数据的封装：最大的区别是目标器件的目标寄存器地址变成了0x40 
void Oled_Write_Data(uint8_t dataData)
{
HAL_I2C_Mem_Write(&hi2c1,0x78,0x40,I2C_MEMADD_SIZE_8BIT,
									&dataData,1,0xff);
	
}

 三、初始化Oled（官方手册上面有）,清屏函数，调入图片的亮点到数组，显示函数。

初始化Oled:

void Oled_Init(void){
Oled_Write_Cmd(0xAE);//--display off
	Oled_Write_Cmd(0x00);//---set low column address
	Oled_Write_Cmd(0x10);//---set high column address
	Oled_Write_Cmd(0x40);//--set start line address  
	Oled_Write_Cmd(0xB0);//--set page address
	Oled_Write_Cmd(0x81); // contract control
	Oled_Write_Cmd(0xFF);//--128   
	Oled_Write_Cmd(0xA1);//set segment remap 
	Oled_Write_Cmd(0xA6);//--normal / reverse
	Oled_Write_Cmd(0xA8);//--set multiplex ratio(1 to 64)
	Oled_Write_Cmd(0x3F);//--1/32 duty
	Oled_Write_Cmd(0xC8);//Com scan direction
	Oled_Write_Cmd(0xD3);//-set display offset
	Oled_Write_Cmd(0x00);//
	
	Oled_Write_Cmd(0xD5);//set osc division
	Oled_Write_Cmd(0x80);//
	
	Oled_Write_Cmd(0xD8);//set area color mode off
	Oled_Write_Cmd(0x05);//
	
	Oled_Write_Cmd(0xD9);//Set Pre-Charge Period
	Oled_Write_Cmd(0xF1);//
	
	Oled_Write_Cmd(0xDA);//set com pin configuartion
	Oled_Write_Cmd(0x12);//
	
	Oled_Write_Cmd(0xDB);//set Vcomh
	Oled_Write_Cmd(0x30);//
	
	Oled_Write_Cmd(0x8D);//set charge pump enable
	Oled_Write_Cmd(0x14);//
	
	Oled_Write_Cmd(0xAF);//--turn on oled panel	


}

清屏函数

void Oled_Screen_Clear(void){
	char i,n;
	Oled_Write_Cmd (0x20);                    //set memory addressing mode
	Oled_Write_Cmd (0x02);                    //page addressing mode

	for(i=0;i<8;i++){
		Oled_Write_Cmd(0xb0+i);               //éè??ò3μ??·￡¨0~7￡?
		Oled_Write_Cmd(0x00);                 //éè????ê??????aáDμíμ??·
		Oled_Write_Cmd(0x10);                 //éè????ê??????aáD??μ??·   
		for(n=0;n<128;n++)Oled_Write_Data(0x00); 			
	}	
}

设置图片的点阵,可以通过电脑画图软件画

通过取模软件生成数据将图片的亮点放到数组：

unsigned char bmpImager[] = {/*--  调入了一幅图像：E:\丁1.bmp  --*/
/*--  宽度x高度=128x64  --*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0xC0,0xC0,0xC0,0xC0,0xC0,0xE0,0xE0,
0xE0,0xE0,0xE0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xE0,0xFC,
0xFF,0x3F,0x0F,0x03,0x01,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,
0x03,0x03,0x03,0x07,0x07,0x07,0x07,0x0F,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x1E,0x1F,
0x1F,0x1F,0x1F,0x3F,0x3F,0x3F,0x3F,0x7B,0x73,0x73,0xF1,0xE1,0xC1,0xC1,0x81,0x80,
0x10,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x3C,0x1C,0x1C,0x1C,
0x1C,0x1E,0x0C,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0xFC,0xFF,0x3F,0x07,
0x00,0x00,0x02,0x07,0x07,0x07,0x07,0x07,0x07,0x07,0x87,0xC7,0xC7,0x87,0x07,0x07,
0x07,0x07,0x07,0x07,0x07,0x07,0x07,0x87,0xFF,0xFF,0xFF,0x07,0x07,0x07,0x07,0x07,
0x07,0x07,0x07,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x03,0x03,0x07,
0x07,0x0F,0x1E,0x1E,0x1C,0x3C,0x38,0x78,0xF0,0xF0,0xE0,0xC0,0xC8,0x1C,0x1C,0x1C,
0x1C,0x1C,0x1C,0x1C,0x1E,0x0E,0x0F,0x0F,0x07,0x07,0x03,0x03,0x03,0x03,0x03,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0x01,0x00,0x00,
0x00,0x00,0x00,0x00,0xF0,0xFC,0xFE,0x9F,0xC6,0xF0,0xFF,0x7F,0x1F,0x01,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0xFF,0xFF,0x3F,0x00,0x00,0x00,0x00,0x00,0xE0,
0xF0,0xF8,0x7E,0x3F,0x0F,0x07,0x87,0xCF,0xEE,0xFE,0xFE,0x3C,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xFF,0xFF,0xFF,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1F,0xFF,0xFF,0xF0,0x80,0x00,
0x00,0x00,0x00,0x00,0x03,0x07,0x07,0x07,0x07,0x03,0x01,0x00,0x00,0x80,0xC0,0x80,
0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x03,
0x07,0x0F,0x0E,0x0E,0x0F,0x07,0x07,0x07,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xF8,0xFF,0x7F,0x0F,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x0F,0x1F,0x7E,
0xF8,0xF0,0xE0,0xC0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x07,
0x0F,0x1F,0x3E,0x7C,0xF8,0xF8,0xFF,0xFF,0x1F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xC0,
0xC0,0xE0,0xF0,0x70,0x78,0x3C,0x1E,0x1F,0x0F,0x07,0x03,0x01,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x01,0x01,0x03,0x07,0x07,0x07,0x07,0x0F,0x0E,0x0E,0x0E,0x1E,0x1C,0x1C,0x1C,
0x1C,0x1C,0x1C,0x3C,0x38,0x39,0x39,0x39,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,
0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x3C,0x1E,0x1F,0x0F,0x07,0x03,0x01,
0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,


};

显示函数：

void Oled_Show_Image(unsigned char *image)
{
	unsigned char i; 
	unsigned int j;
	
	for(i=0;i<8;i++){
		Oled_Write_Cmd(0xB0 + i);//page0--page7
		//每个page从0列
		Oled_Write_Cmd(0x00);
		Oled_Write_Cmd(0x10);
		//0到127列，依次写入0，每写入数据，列地址自动偏移
		for(j = 128 * i; j<(128 * (i+1));j++){
			Oled_Write_Data(image[j]);
		}
	}
}

四、主函数

直接在while(1)循环之前添加即可。

//1. OLED初始化
			Oled_Init();
			//2. 选择一个位置
			//2.1 确认页寻址模式
			Oled_Write_Cmd(0x20);
			Oled_Write_Cmd(0x02);
			Oled_Screen_Clear();
			Oled_Show_Image(bmpImager);

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