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Replace delay with delayMicroseconds to let it work while interruppts are disabeled.

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In multihreaded environment (I used NilRTOS) its usefull to disable interruppts while reading the sensors. However delay() requires interrupts to be enabled. If you read more than one sensor in a sequence the 2nd one gets spurious DHTLIB_ERROR_CONNECT errors. Timing issues with the wakeup delay().
They don't used to happen it interrupts are enabled. Replacing delay() with delayMicroseconds() solved this issue.
This commit is contained in:
Peter Hahn 2015-10-11 22:56:25 +02:00
parent bd5f923158
commit 174a065598
1 changed files with 2 additions and 2 deletions
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4
libraries/DHTlib/dht.cpp
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@ -124,7 +124,7 @@ int8_t dht::_readSensor(uint8_t pin, uint8_t wakeupDelay, uint8_t leadingZeroBit
// REQUEST SAMPLE
pinMode(pin, OUTPUT);
digitalWrite(pin, LOW); // T-be
delay(wakeupDelay);
delayMicroseconds(wakeupDelay*1000);
digitalWrite(pin, HIGH); // T-go
pinMode(pin, INPUT);
@ -197,4 +197,4 @@ int8_t dht::_readSensor(uint8_t pin, uint8_t wakeupDelay, uint8_t leadingZeroBit
}
//
// END OF FILE
//
//