fix pulseInLong considering overflow

fixes #3830

Author: facchinm

cores/arduino/wiring_pulse.cpp

@@ -69,22 +69,24 @@ uint32_t pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout)
 uint32_t bit = p.ulPin;
 uint32_t stateMask = state ? bit : 0;
 
-unsigned long maxMicros = micros() + timeout;
+unsigned long startMicros = micros();
 
 // wait for any previous pulse to end
-while ((p.pPort->PIO_PDSR & bit) == stateMask)
-if (micros() > maxMicros)
+while ((p.pPort->PIO_PDSR & bit) == stateMask) {
+if (micros() - startMicros > timeout)
 return 0;
+}
 
 // wait for the pulse to start
-while ((p.pPort->PIO_PDSR & bit) != stateMask)
-if (micros() > maxMicros)
+while ((p.pPort->PIO_PDSR & bit) != stateMask) {
+if (micros() - startMicros > timeout)
 return 0;
+}
 
 unsigned long start = micros();
 // wait for the pulse to stop
 while ((p.pPort->PIO_PDSR & bit) == stateMask) {
-if (micros() > maxMicros)
+if (micros() - startMicros > timeout)
 return 0;
 }
 return micros() - start;