[STM32F4] STM32F407 —— 硬件 I2C 驱动的步骤与应用

/*********************OLED初始化************************************/

void OLED_Init(void)

{

        delay_ms(500);//初始化之前的延时很重要！

        OLED_WrCmd(0xae);//--turn off oled panel

        OLED_WrCmd(0x00);//---set low column address

        OLED_WrCmd(0x10);//---set high column address

        OLED_WrCmd(0x40);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)

        OLED_WrCmd(0x81);//--set contrast control register

        OLED_WrCmd(Brightness); // Set SEG Output Current Brightness

        OLED_WrCmd(0xa1);//--Set SEG/Column Mapping     0xa0左右反置 0xa1正常

        OLED_WrCmd(0xc8);//Set COM/Row Scan Direction   0xc0上下反置 0xc8正常

        OLED_WrCmd(0xa6);//--set normal display

        OLED_WrCmd(0xa8);//--set multiplex ratio(1 to 64)

        OLED_WrCmd(0x3f);//--1/64 duty

        OLED_WrCmd(0xd3);//-set display offset        Shift Mapping RAM Counter (0x00~0x3F)

        OLED_WrCmd(0x00);//-not offset

        OLED_WrCmd(0xd5);//--set display clock divide ratio/oscillator frequency

        OLED_WrCmd(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec

        OLED_WrCmd(0xd9);//--set pre-charge period

        OLED_WrCmd(0xf1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock   

        OLED_WrCmd(0xda);//--set com pins hardware configuration

        OLED_WrCmd(0x12);

        OLED_WrCmd(0xdb);//--set vcomh

        OLED_WrCmd(0x40);//Set VCOM Deselect Level

        OLED_WrCmd(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02)

        OLED_WrCmd(0x02);//

        OLED_WrCmd(0x8d);//--set Charge Pump enable/disable

        OLED_WrCmd(0x14);//--set(0x10) disable

        OLED_WrCmd(0xa4);// Disable Entire Display On (0xa4/0xa5)

        OLED_WrCmd(0xa6);// Disable Inverse Display On (0xa6/a7) 

        OLED_WrCmd(0xaf);//--turn on oled panel

        OLED_Fill(0x00); //初始清屏

        OLED_Set_Pos(0,0);

} 

unsigned long MS583703BA_getConversion(uint8_t command)

{

 

                        unsigned long conversion = 0;

                        u8 temp[3];

        

            IIC_Start();

                        IIC_Send_Byte(0xEC);                 //写地址

                        IIC_Wait_Ack();

                        IIC_Send_Byte(command); //写转换命令

                        IIC_Wait_Ack();

                        IIC_Stop();



                        delay_ms(10);

                        IIC_Start();

                        IIC_Send_Byte(0xEC);                 //写地址

                        IIC_Wait_Ack();

                        IIC_Send_Byte(0);                                // start read sequence

                        IIC_Wait_Ack();

                        IIC_Stop();

                 

                        IIC_Start();

                        IIC_Send_Byte(0xEC+0x01);  //进入接收模式

                        IIC_Wait_Ack();

                        temp[0] = IIC_Read_Byte(1);  //带ACK的读数据  bit 23-16

                        temp[1] = IIC_Read_Byte(1);  //带ACK的读数据  bit 8-15

                        temp[2] = IIC_Read_Byte(0);  //带NACK的读数据 bit 0-7

                        IIC_Stop();

                        

                        conversion = (unsigned long)temp[0] * 65536 + (unsigned long)temp[1] * 256 + (unsigned long)temp[2];

                        return conversion;

 

}