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TM4C1294NCPDT: When executing the function Semaphore_pend(), TI-RTOS will abort

Guo Yinxiu
Prodigy 170 points
Part Number: TM4C1294NCPDT

For UART driver in TI-RTOS (TM4C1294 platform), when executing the function  Semaphore_pend(), TI-RTOS will abort, why is it?

File: UARTTiva.c

int UARTTiva_write(UART_Handle handle, const void *buffer, size_t size)
{

...

/* If writeMode is blocking, block and get the state. */
if (object->state.writeMode == UART_MODE_BLOCKING) {
/* Pend on semaphore and wait for Hwi to finish. */
if (!Semaphore_pend(Semaphore_handle(&object->writeSem),
object->writeTimeout)) {
/* Semaphore timed out, make the write empty and log the write. */
UARTIntDisable(hwAttrs->baseAddr, UART_INT_TX);
UARTIntClear(hwAttrs->baseAddr, UART_INT_TX);
object->writeCount = 0;

  • 0
    TI__Guru**** 191466 points

    Hi,

    I'm running the same uartecho example and I can't see any abort generated due to Semaphore_pend in the UARTTiva.c file.  I'm not sure if you had modified the example. Can you confirm that if you run the stock example as is, it will work for you? See my COM port display. I type in some text and no problem running and I do not encountered any abort.