Function efm_spiFlash_init

bsp/efm32/dev_sflash.c:135–176

Private function prototypes ---------------------------------------------------*/ Private functions ------------------------------------------------------------*/ / * @brief * Initialize the SPI Flash * * @details * * @note * * @return * Error code *********************************************************************/

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

    usart = (struct efm32_usart_device_t *)(sFlash->user_data);

#if defined(EFM32_GXXX_DK)
    /* Enable SPI access to Flash */
    DVK_writeRegister(BC_SPI_CFG, 0);
#endif

    do
    {
        /* Find SPI device */
        sFlash = rt_device_find(SFLASH_USING_DEVICE_NAME);
        if (sFlash == RT_NULL)
        {
            sflash_debug("SFLASH: Can't find device %s!\n",
                SFLASH_USING_DEVICE_NAME);
            break;
        }
        sflash_debug("SFLASH: Find device %s\n", SFLASH_USING_DEVICE_NAME);

        /* Config chip slect pin */
        if (!(usart->state & USART_STATE_AUTOCS))
        {
            GPIO_PinModeSet(SFLASH_CS_PORT, SFLASH_CS_PIN, gpioModePushPull, 1);
            sFlashAutoCs = false;
        }

        /* Open SPI device */
        if (sFlash->open(sFlash, RT_DEVICE_OFLAG_RDWR) != RT_EOK)
        {
            break;
        }

        return RT_EOK;
    } while(0);

    sflash_debug("SFLASH: Init failed!\n");
    return -RT_ERROR;
}

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