Serial Port with Timeout using Timer Event

[waynetaylor]

Many people have asked about solutions for adding timeouts to the fgetc() blocking function. How about using a timer event to restart the task that called fgetc()? I don't know how to do it, but I think it might have something to do with _taskq_resume().

Has anyone used task queues.

Wayne

[Carlos_Musich]

Hi Wayne,

If you want the task to exit form fgetc() and continue you would need to modify the bsp. But if you dont have problem on restarting the task you may use a timer as you say.

In MQX installation you can find hwtimer and timer examples. C:\Freescale\Freescale_MQX_4_2\mqx\examples

You can also use lwtimer.

For restarting the task you need _task_restart()

E.g.

_task_id uart_task_id;

uart_task_id = _task_create(0, UART_TASK, 0);

_task_restart(uart_task_id, NULL, 0);

Best regards,

Carlos