STM32开发——IIC（OLED屏幕）

目录

1.项目需求及IIC简介

3.HAL库IIC函数封装代码

4.CubeMX设置

5.函数代码

---

1.项目需求及IIC简介

在oled屏幕上显示文字或者图像。

IIC协议——OLED屏幕_趣知boy的博客-CSDN博客

3.HAL库IIC函数封装代码

用到的库函数：
 

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）

//向OLED写入命令
void w_cmd_i2c(uint8_t cmd)
{
	HAL_I2C_Mem_Write(&hi2c1,0x78,0x00,1,&cmd,1,0xff);
}

//向OLED写入数据
void w_data_i2c(uint8_t data1)
{
	HAL_I2C_Mem_Write(&hi2c1,0x78,0x40,1,&data1,1,0xff);
}

4.CubeMX设置

 

5.函数代码

1.重写OLED写命令函数、写数据函数
2.OLED初始化
3.OLED清屏
4.OLED写图像

void w_cmd_i2c(uint8_t cmd)
{
	HAL_I2C_Mem_Write(&hi2c1,0x78,0x00,1,&cmd,1,0xff);
}
 
void w_data_i2c(uint8_t data1)
{
	HAL_I2C_Mem_Write(&hi2c1,0x78,0x40,1,&data1,1,0xff);
}

void init_i2c(void)
{
	w_cmd_i2c(0xAE);//--display off
	w_cmd_i2c(0x00);//---set low column address
	w_cmd_i2c(0x10);//---set high column address
	w_cmd_i2c(0x40);//--set start line address 
	w_cmd_i2c(0xB0);//--set page address
	w_cmd_i2c(0x81); // contract control
	w_cmd_i2c(0xFF);//--128 
	w_cmd_i2c(0xA1);//set segment remap
	w_cmd_i2c(0xA6);//--normal / reverse
	w_cmd_i2c(0xA8);//--set multiplex ratio(1 to 64)
	w_cmd_i2c(0x3F);//--1/32 duty
	w_cmd_i2c(0xC8);//Com scan direction
	w_cmd_i2c(0xD3);//-set display offset
	w_cmd_i2c(0x00);//
	w_cmd_i2c(0xD5);//set osc division
	w_cmd_i2c(0x80);//
	w_cmd_i2c(0xD8);//set area color mode off
	w_cmd_i2c(0x05);//
	w_cmd_i2c(0xD9);//Set Pre-Charge Period
	w_cmd_i2c(0xF1);//
	w_cmd_i2c(0xDA);//set com pin configuartion
	w_cmd_i2c(0x12);//
	w_cmd_i2c(0xDB);//set Vcomh
	w_cmd_i2c(0x30);//
	w_cmd_i2c(0x8D);//set charge pump enable
	w_cmd_i2c(0x14);//
	w_cmd_i2c(0xAF);//--turn on oled panel
}

void clear_oled(void)
{
	char i;  int j;
 
	for(i=0;i<8;i++){
		w_cmd_i2c(0xB0+i);    //变换page
		w_cmd_i2c(0x00);    //设置起始地址  低位
		w_cmd_i2c(0x10);    //设置起始地址  高位
		for(j=0;j<128;j++){
			w_data_i2c(0x00);  //写0就行  
		}
	}
	
}

void write_image(char *tx)
{
	int i,j;
	for(i=0;i<8;i++){
			
			w_cmd_i2c(0xB0+i);    //变换page  共有0-7 8个
			w_cmd_i2c(0x00);    //设置起始地址  低位
			w_cmd_i2c(0x10);    //设置起始地址  高位
			//i=3;
			for(j=128*i; j<(128*(i+1)); j++){   //变换的是tx中的数据
				w_data_i2c(tx[j]);  //tx中的数据  
			}
		}
}

char tx[]={
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0xF0,0x78,0x7C,0x7C,0xBE,0xBE,0xFE,
0xFE,0xFE,0xDE,0xCF,0xCF,0x9F,0x9F,0x8E,0x8E,0x87,0x83,0x80,0x80,0x80,0x80,0x80,
0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x80,0x80,0x80,0x80,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xE0,0xE0,0xE0,0xE0,
0xE0,0xE0,0xF0,0xF0,0xF0,0xF0,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF0,0xE0,0xE0,
0xE0,0xE0,0xE0,0xE0,0xE0,0x60,0x00,0x00,0x00,0x80,0xC0,0xE0,0xF0,0xF8,0xF8,0xF8,
0xFC,0xFC,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0x1F,0x1F,0x3F,0xFF,0xFF,0xFB,0x03,0x07,0x0F,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xFF,0xFF,0xFF,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,0x3F,0x1F,
0x8F,0xC7,0xE1,0xF1,0xF8,0xFC,0xFC,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x3F,0x3F,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xE3,0xC2,0x80,0xCF,0xFF,0x03,0x00,0x80,0xFC,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFC,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xFF,0xFF,0xFF,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,0xFF,0xFF,0xFF,0x1F,0xFF,0xFF,0xFF,0xFE,0x00,0xF0,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFB,0xE7,0xFF,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,0xFE,0x9C,0x88,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xFF,0xFF,0xFF,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,0x87,0x0F,0x3F,
0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x03,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xEF,0xF1,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0xFF,0xFF,0x1F,0x1F,0x3F,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,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,
0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFC,
0xF8,0xF0,0xE1,0xE3,0xC7,0x8F,0x1F,0x3F,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,0x31,0x00,0x80,0xFF,0xFF,0xF8,0x00,0x00,0x3F,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,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,
0x00,0x01,0x01,0x01,0x01,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,0x00,0x01,0x03,0x03,0x07,0x07,
0x0F,0x0F,0x0F,0x1F,0x1F,0x1F,0x1F,0xFF,0xFF,0xFF,0xBF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFE,0x7E,0x7F,0x7F,0x7F,0x3F,0x30,0x38,0x3F,0x3F,0x3F,0x3F,
0x3F,0x3F,0x3F,0x1F,0x0F,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x07,0x07,0x0F,0x0F,0x1F,0x1F,0x1F,
0x3F,0x3F,0x3C,0x3C,0x7E,0x7E,0x7E,0x0E,0x1C,0x3C,0x30,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};    //这是page7的内容

main函数中代码

	init_i2c();
	clear_oled();
	write_image(tx);