Function rt_msd_write

components/drivers/spi/dev_spi_msd.c:1364–1482

}

static rt_ssize_t rt_msd_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
    struct msd_device *msd = (struct msd_device *)dev;
    uint8_t response[MSD_RESPONSE_MAX_LEN];
    rt_err_t result;

    result = MSD_take_owner(msd->spi_device);

    if (result != RT_EOK)
    {
        MSD_DEBUG("[err] get SPI owner fail!\r\n");
        goto _exit;
    }


    /* SINGLE_BLOCK? */
    if (size == 1)
    {
        rt_spi_take(msd->spi_device);
        result = _send_cmd(msd->spi_device, WRITE_BLOCK, pos * msd->geometry.bytes_per_sector, 0x00, response_r1, response);
        if ((result != RT_EOK) || (response[0] != MSD_RESPONSE_NO_ERROR))
        {
            MSD_DEBUG("[err] CMD WRITE_BLOCK fail!\r\n");
            size = 0;
            goto _exit;
        }

        result = _write_block(msd->spi_device, buffer, msd->geometry.bytes_per_sector, MSD_TOKEN_WRITE_SINGLE_START);
        if (result != RT_EOK)
        {
            MSD_DEBUG("[err] write SINGLE_BLOCK #%d fail!\r\n", pos);
            size = 0;
        }
    }
    else if (size > 1)
    {
        struct rt_spi_message message;
        uint32_t i;

        rt_spi_take(msd->spi_device);

#ifdef MSD_USE_PRE_ERASED
        if (msd->card_type != MSD_CARD_TYPE_MMC)
        {
            /* CMD55 APP_CMD */
            result = _send_cmd(msd->spi_device, APP_CMD, 0x00, 0x00, response_r1, response);
            if ((result != RT_EOK) || (response[0] != MSD_RESPONSE_NO_ERROR))
            {
                MSD_DEBUG("[err] CMD55 APP_CMD fail!\r\n");
                size = 0;
                goto _exit;
            }

            /* ACMD23 Pre-erased */
            result = _send_cmd(msd->spi_device, SET_WR_BLK_ERASE_COUNT, size, 0x00, response_r1, response);
            if ((result != RT_EOK) || (response[0] != MSD_RESPONSE_NO_ERROR))
            {
                MSD_DEBUG("[err] ACMD23 SET_BLOCK_COUNT fail!\r\n");