Function efm_spiSd_init

bsp/efm32/drv_sdcard.c:1195–1240

/ * @brief * Initialize all memory card related hardware and register the device to * kernel * * @details * * @note * * @return * Error code ******************************************************************************/

*   Error code
******************************************************************************/
rt_err_t efm_spiSd_init(void)
{
    struct efm32_usart_device_t *usart;

    do
    {
        /* Find SPI device */
        spi = rt_device_find(SPISD_USING_DEVICE_NAME);
        if (spi == RT_NULL)
        {
            sdcard_debug("SPISD: Can't find device %s!\n",
                SPISD_USING_DEVICE_NAME);
            break;
        }
        sdcard_debug("SPISD: Find device %s\n", SPISD_USING_DEVICE_NAME);

        /* Config chip slect pin */
        usart = (struct efm32_usart_device_t *)(spi->user_data);
        if (!(usart->state & USART_STATE_AUTOCS))
        {
            GPIO_PinModeSet(SD_CS_PORT, SD_CS_PIN, gpioModePushPull, 1);
            sdAutoCs = false;
        }

        /* Register SPI SD device */
        sd_device.type      = RT_Device_Class_MTD;
        sd_device.init      = rt_spiSd_init;
        sd_device.open      = rt_spiSd_open;
        sd_device.close     = rt_spiSd_close;
        sd_device.read      = rt_spiSd_read;
        sd_device.write     = rt_spiSd_write;
        sd_device.control   = rt_spiSd_control;
        sd_device.user_data = RT_NULL;
        rt_device_register(
            &sd_device,
            SPISD_DEVICE_NAME,
            RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);

        sdcard_debug("SPISD: HW init OK, card type %x\n", sdType);
        return RT_EOK;
    } while (0);

    /* Release buffer */
    rt_kprintf("SPISD: HW init failed!\n");
    return -RT_ERROR;
}

/***************************************************************************//**
 * @brief