Function _read_block

components/drivers/spi/dev_spi_msd.c:337–376

}

static rt_err_t _read_block(struct rt_spi_device *device, void *buffer, uint32_t block_size)
{
    struct rt_spi_message message;
    rt_err_t result;

    /* wati token */
    result = _wait_token(device, MSD_TOKEN_READ_START);
    if (result != RT_EOK)
    {
        return result;
    }

    /* read data */
    {
        /* initial message */
        message.send_buf = RT_NULL;
        message.recv_buf = buffer;
        message.length = block_size;
        message.cs_take = message.cs_release = 0;

        /* transfer message */
        device->bus->ops->xfer(device, &message);
    } /* read data */

    /* get crc */
    {
        uint8_t recv_buffer[2];

        /* initial message */
        message.send_buf = RT_NULL;
        message.recv_buf = recv_buffer;
        message.length = 2;
        message.cs_take = message.cs_release = 0;

        /* transfer message */
        device->bus->ops->xfer(device, &message);
    } /* get crc */

    return RT_EOK;
}

static rt_err_t _write_block(struct rt_spi_device *device, const void *buffer, uint32_t block_size, uint8_t token)
{