Function _wait_token

components/drivers/spi/dev_spi_msd.c:270–302

}

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

    tick_start = rt_tick_get();

    /* wati token */
    /* initial message */
    send = DUMMY;
    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 == token)
        {
            return RT_EOK;
        }

        if (rt_tick_timeout(tick_start, rt_tick_from_millisecond(CARD_WAIT_TOKEN_TIMES)))
        {
            MSD_DEBUG("[err] wait data start token timeout!\r\n");
            return -RT_ETIMEOUT;
        }
    } /* wati token */
}

static rt_err_t _wait_ready(struct rt_spi_device *device)
{