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wait_us without usticker #9896

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Merged
merged 1 commit into from
Mar 14, 2019
Merged

wait_us without usticker #9896

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10 changes: 10 additions & 0 deletions platform/mbed_wait_api_no_rtos.c
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Original file line number Diff line number Diff line change
Expand Up @@ -37,9 +37,19 @@ void wait_ms(int ms)

void wait_us(int us)
{
#if DEVICE_USTICKER
const ticker_data_t *const ticker = get_us_ticker_data();
uint32_t start = ticker_read(ticker);
while ((ticker_read(ticker) - start) < (uint32_t)us);
#else // fallback to wait_ns for targets without usticker
while (us > 1000) {
us -= 1000;
wait_ns(1000000);
}
if (us > 0) {
wait_ns(us * 1000);
}
#endif // DEVICE_USTICKER
}

#endif // #ifndef MBED_CONF_RTOS_PRESENT
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