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edWin-m 2022-12-06 18:06:23 +08:00
parent 97d11f3fd5
commit 3f20e85202
1 changed files with 14 additions and 14 deletions
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DHT.cpp
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@ -32,20 +32,21 @@
/** /**
* @brief Instantiates a default DHT class * @brief Instantiates a default DHT class
* *
*/ */
DHT::DHT() { DHT::DHT() {
_pin = 2; // pin 2 set as the default data pin _pin = 2; // pin 2 set as the default data pin
_type = DHT11; // using the DHT11 sensor as the default sensor type. _type = DHT11; // using the DHT11 sensor as the default sensor type.
// Note that pin 2 and DHT11 are just default values to // Note that pin 2 and DHT11 are just default values to initialize members
// initialize members _pin and _type in the class definition. // _pin and _type in the class definition. They can be modified via
// They can be modified via DHT::begin(uint8_t pin, uint8_t type, uint8_t usec). // DHT::begin(uint8_t pin, uint8_t type, uint8_t usec).
#ifdef __AVR #ifdef __AVR
_bit = digitalPinToBitMask(_pin); _bit = digitalPinToBitMask(_pin);
_port = digitalPinToPort(_pin); _port = digitalPinToPort(_pin);
#endif #endif
_maxcycles = microsecondsToClockCycles(1000); // 1 millisecond timeout for _maxcycles =
// reading pulses from DHT sensor. microsecondsToClockCycles(1000); // 1 millisecond timeout for
// reading pulses from DHT sensor.
} }
/*! /*!
@ -92,17 +93,16 @@ void DHT::begin(uint8_t usec) {
/** /**
* @brief Setup sensor pins and set pull timings * @brief Setup sensor pins and set pull timings
* *
* @param pin * @param pin
* pin number that sensor is connected * pin number that sensor is connected
* @param type * @param type
* type of sensor * type of sensor
* @param usec * @param usec
* Optionally pass pull-up time (in microseconds) before DHT reading * Optionally pass pull-up time (in microseconds) before DHT reading
* starts. Default is 55 (see function declaration in DHT.h). * starts. Default is 55 (see function declaration in DHT.h).
*/ */
void DHT::begin(uint8_t pin, uint8_t type, uint8_t usec) void DHT::begin(uint8_t pin, uint8_t type, uint8_t usec) {
{
_pin = pin; _pin = pin;
_type = type; _type = type;
#ifdef __AVR #ifdef __AVR