[APM32E0] 【APM32E030R Micro-EVB开发板评测】+ 使用硬件I2C驱动OLED

void I2CInit(void)

{

    GPIO_Config_T gpioConfigStruct;

    I2C_Config_T i2cConfigStruct;

    /* Enable I2C related Clock */

    RCM_EnableAHBPeriphClock(RCM_AHB_PERIPH_GPIOB);

    RCM_EnableAPB1PeriphClock(RCM_APB1_PERIPH_I2C1);

    RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_SYSCFG);



    /* Connect I2C to SCL */

    GPIO_ConfigPinAF(GPIOB, GPIO_PIN_SOURCE_8, GPIO_AF_PIN1);

    /* Connect I2C to SDA */

    GPIO_ConfigPinAF(GPIOB, GPIO_PIN_SOURCE_9, GPIO_AF_PIN1);

    /*  Config I2C1 GPIO */

    gpioConfigStruct.mode = GPIO_MODE_AF;

    gpioConfigStruct.speed = GPIO_SPEED_50MHz;

    gpioConfigStruct.outtype = GPIO_OUT_TYPE_OD;

    gpioConfigStruct.pupd = GPIO_PUPD_NO;

    gpioConfigStruct.pin = GPIO_PIN_8;

    GPIO_Config(GPIOB, &gpioConfigStruct);



    gpioConfigStruct.pin = GPIO_PIN_9;

    GPIO_Config(GPIOB, &gpioConfigStruct);



    /* Config I2C1 */

    I2C_Reset(I2C1);

    RCM_ConfigI2CCLK(RCM_I2C1CLK_SYSCLK);

    i2cConfigStruct.ack = I2C_ACK_ENABLE;

    i2cConfigStruct.ackaddress = I2C_ACK_ADDRESS_7BIT;

    i2cConfigStruct.address1 = 0XA0;

    i2cConfigStruct.analogfilter = I2C_ANALOG_FILTER_ENABLE;

    i2cConfigStruct.digitalfilter = I2C_DIGITAL_FILTER_0;

    i2cConfigStruct.mode = I2C_MODE_I2C;

    i2cConfigStruct.timing = 0x80100103;

    I2C_Config(I2C1, &i2cConfigStruct);



    /* Enable I2Cx */

    I2C_Enable(I2C1);

}

//发送一个字节

//mode:数据/命令标志 0,表示命令;1,表示数据;

void OLED_WR_Byte(u8 dat,u8 mode)

{

    /* I2C Send Configuration */



   I2C_HandlingTransfer(I2C1, 0x78, 2, I2C_RELOAD_MODE_AUTOEND, I2C_GENERATE_START_WRITE);

        

   if(mode){I2C_TxData(I2C1,0x40);}

   else{I2C_TxData(I2C1,0x00);}        

   while (I2C_ReadStatusFlag(I2C1, I2C_FLAG_TXBE) == RESET);

   I2C_TxData(I2C1, dat);

   while (I2C_ReadStatusFlag(I2C1, I2C_FLAG_TXBE) == RESET);

    /* I2C Generate Stop signal */

   I2C_EnableGenerateStop(I2C1);

   /* I2C Clear Stop Flag */

   I2C_ClearIntFlag(I2C1, I2C_INT_FLAG_STOP);

        

}

//更新显存到OLED        

void OLED_Refresh(void)

{

        u8 i,n;

        for(i=0;i<8;i++)

        {

                OLED_WR_Byte(0xb0+i,OLED_CMD); //设置行起始地址

                OLED_WR_Byte(0x00,OLED_CMD);   //设置低列起始地址

                OLED_WR_Byte(0x10,OLED_CMD);   //设置高列起始地址

                



                for(n=0;n<128;n++)

                {

                        I2C_HandlingTransfer(I2C1, 0x78, 2, I2C_RELOAD_MODE_AUTOEND, I2C_GENERATE_START_WRITE);

                  I2C_TxData(I2C1,0x40);

      while (I2C_ReadStatusFlag(I2C1, I2C_FLAG_TXBE) == RESET);

                        I2C_TxData(I2C1,OLED_GRAM[n][i]);

                        while (I2C_ReadStatusFlag(I2C1, I2C_FLAG_TXBE) == RESET);

                }

    /* I2C Generate Stop signal */

   I2C_EnableGenerateStop(I2C1);

   /* I2C Clear Stop Flag */

   I2C_ClearIntFlag(I2C1, I2C_INT_FLAG_STOP);

  }

}