MM32F3273G8P火龙果开发板MindSDK开发教程9 -i2c阻塞方式的使用

MM32F3273G8P火龙果开发板MindSDK开发教程9 -i2c阻塞方式的使用

1、I2c的初始化

使用PC6 PC7。
我在这路I2c上挂在了一颗MSA311的加速器模块，设置成功后，去读加速器模块的PARTID，看是否能够正常读写。
i2c初始化函数

void BOARD_I2C1_Init(void)
{
    GPIO_Init_Type gpio_init;
    /* PC6 - I2C1_SCL. */
    gpio_init.Pins  = GPIO_PIN_6;
    gpio_init.PinMode  = GPIO_PinMode_AF_OpenDrain;
    gpio_init.Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOC, &gpio_init);
    GPIO_PinAFConf(GPIOC, gpio_init.Pins, GPIO_AF_4);

    /* PC7 - I2C1_SDA. */
    gpio_init.Pins  = GPIO_PIN_7;
    gpio_init.PinMode  = GPIO_PinMode_AF_OpenDrain;
    gpio_init.Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOC, &gpio_init);
    GPIO_PinAFConf(GPIOC, gpio_init.Pins, GPIO_AF_4);

    /* Setup I2C initialization values. */
    I2C_Master_Init_Type i2c_init;
    i2c_init.ClockFreqHz = CLOCK_APB1_FREQ;
    i2c_init.BaudRate = I2C_BaudRate_100K;

    /* Initialize I2C master. */
    I2C_InitMaster(I2C1, &i2c_init);

    /* The target device address needs to be configured before enabling. */
    I2C_SetTargetAddr(I2C1, APP_I2C_TARGET_ADDR);

    /* Enable I2C. */
    I2C_Enable(I2C1, true);
}

时钟初始化放在了clock_init.c中

2、读写函数封装

/* Write data to target device, true to writing succeed, false to writing failed. */
bool BOARD_I2c1_Write(uint8_t txlen, uint8_t *txbuf)
{
    app_i2c_xfer.WaitTimes = APP_I2C_TIMEOUT_TIME;
    app_i2c_xfer.TxBuf = txbuf;
    app_i2c_xfer.TxLen = txlen;

    I2C_Enable(I2C1, true);  /* Disable I2C to clear tx fifo, and enabled I2C to perform the write operation again. */
    if ( false == I2C_MasterWriteBlocking(I2C1, &app_i2c_xfer) )
    {
        return false;
    }
    else
    {
        return true;
    }
}

/* Read data to target device, true to reading succeed, false to reading failed. */
bool BOARD_I2c1_Read(uint8_t rxlen, uint8_t *rxbuf)
{
    app_i2c_xfer.WaitTimes = APP_I2C_TIMEOUT_TIME;
    app_i2c_xfer.RxBuf = rxbuf;
    app_i2c_xfer.RxLen = rxlen;

    I2C_Enable(I2C1, true);  /* Disable I2C to clear tx fifo, and enabled I2C to perform the read operation again. */
    if ( false == I2C_MasterReadBlocking(I2C1, &app_i2c_xfer) )
    {
        return false;
    }
    else
    {
        return true;
    }
}

3、读写msa311 PARTID

4、现象


所以读写没有问题。
5、代码
下载路径