Function _serial_int_tx

components/drivers/serial/dev_serial.c:361–396

}

rt_inline int _serial_int_tx(struct rt_serial_device *serial, const rt_uint8_t *data, int length)
{
    int size;
    struct rt_serial_tx_fifo *tx;

    RT_ASSERT(serial != RT_NULL);

    size = length;
    tx = (struct rt_serial_tx_fifo*) serial->serial_tx;
    RT_ASSERT(tx != RT_NULL);

    while (length)
    {
        /*
         * to be polite with serial console add a line feed
         * to the carriage return character
         */
        if (*data == '\n' && (serial->parent.open_flag & RT_DEVICE_FLAG_STREAM))
        {
            if (serial->ops->putc(serial, '\r') == -1)
            {
                rt_completion_wait(&(tx->completion), RT_WAITING_FOREVER);
                continue;
            }
        }

        while (serial->ops->putc(serial, *(char*)data) == -1)
        {
            rt_completion_wait(&(tx->completion), RT_WAITING_FOREVER);
        }

        data ++; length --;
    }

    return size - length;
}

static void _serial_check_buffer_size(void)
{