Tiva Timer: Timer test must attach a timer handler or the timer is stopped at the first interrupt
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@ -71,6 +71,21 @@
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* timer_handler
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****************************************************************************/
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static bool timer_handler(FAR uint32_t *next_interval_us)
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{
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/* This handler may:
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*
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* (1) Modify the timeout value to change the frequency dynamically, or
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* (2) Return false to stop the timer.
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*/
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return true;
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}
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/****************************************************************************
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* timer_status
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****************************************************************************/
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@ -111,6 +126,7 @@ int main(int argc, FAR char *argv[])
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int timer_main(int argc, char *argv[])
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#endif
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{
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struct timer_sethandler_s handler;
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int ret;
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int fd;
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int i;
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@ -144,6 +160,28 @@ int timer_main(int argc, char *argv[])
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return EXIT_FAILURE;
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}
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/* Show the timer status before attaching the timer handler */
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timer_status(fd);
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/* Attach the timer handler
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*
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* NOTE: If no handler is attached, the timer stop at the first interrupt.
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*/
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printf("Attach timer handler\n");
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handler.newhandler = timer_handler;
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handler.oldhandler = NULL;
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ret = ioctl(fd, TCIOC_SETHANDLER, (unsigned long)((uintptr_t)&handler));
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: Failed to set the timer handler: %d\n", errno);
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close(fd);
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return EXIT_FAILURE;
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}
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/* Show the timer status before starting */
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timer_status(fd);
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