Function _wait_ready

components/drivers/spi/dev_spi_msd.c:304–335

}

static rt_err_t _wait_ready(struct rt_spi_device *device)
{
    struct rt_spi_message message;
    rt_tick_t tick_start;
    uint8_t send, recv;

    tick_start = rt_tick_get();

    send = DUMMY;
    /* initial message */
    message.send_buf = &send;
    message.recv_buf = &recv;
    message.length = 1;
    message.cs_take = message.cs_release = 0;

    while (1)
    {
        /* transfer message */
        device->bus->ops->xfer(device, &message);

        if (recv == DUMMY)
        {
            return RT_EOK;
        }

        if (rt_tick_timeout(tick_start, rt_tick_from_millisecond(1000)))
        {
            MSD_DEBUG("[err] wait ready timeout!\r\n");
            return -RT_ETIMEOUT;
        }
    }
}

static rt_err_t _read_block(struct rt_spi_device *device, void *buffer, uint32_t block_size)
{