STM32IIC实验

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);