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fixed pulseIn function to match arduino reference #25

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fixed pulseIn function to match arduino reference #25

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8 changes: 4 additions & 4 deletions cores/silabs/wiring_pulse.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -45,16 +45,16 @@ unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout)
unsigned long timing_start;
unsigned long timing_result;
unsigned long timeout_end = micros() + timeout;
// Wait for the pin to change to the opposite of the requested state
bool res = wait_for_pin_state(pin, !state, timeout_end);
// Wait for the pin to change to the requested state
bool res = wait_for_pin_state(pin, state, timeout_end);
// Start measurment
timing_start = micros();
// Return 0 if we timed out
if (!res) {
return 0;
}
// Wait for the pin to change to the requested state
res = wait_for_pin_state(pin, state, timeout_end);
// Wait for the pin to change to the opposite of the requested state
res = wait_for_pin_state(pin, !state, timeout_end);
// Calculate the measurement result
timing_result = micros() - timing_start;
// Return 0 if we timed out
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