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Prevent recursive processing of us_ticker in FSL #1646

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Merged
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Apr 4, 2016
Merged

Prevent recursive processing of us_ticker in FSL #1646

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7 changes: 5 additions & 2 deletions libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/us_ticker.c
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Original file line number Diff line number Diff line change
Expand Up @@ -68,8 +68,11 @@ void us_ticker_clear_interrupt(void) {
void us_ticker_set_interrupt(timestamp_t timestamp) {
int delta = (int)(timestamp - us_ticker_read());
if (delta <= 0) {
// This event was in the past:
us_ticker_irq_handler();
// This event was in the past.
// Set the interrupt as pending, but don't process it here.
// This prevents a recurive loop under heavy load
// which can lead to a stack overflow.
NVIC_SetPendingIRQ(PIT3_IRQn);
return;
}

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