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+ 0.1.08

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+ minor revision of comments
+ added formula for timeout to support DUE
This commit is contained in:
Rob Tillaart 2013-11-26 08:29:24 +01:00
parent d7e68d4c3a
commit 4126dfc63a
2 changed files with 11 additions and 5 deletions
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12
libraries/DHTlib/dht.cpp
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@ -1,11 +1,12 @@
//
// FILE: dht.cpp
// AUTHOR: Rob Tillaart
// VERSION: 0.1.07
// VERSION: 0.1.08
// PURPOSE: DHT Temperature & Humidity Sensor library for Arduino
// URL: http://arduino.cc/playground/Main/DHTLib
//
// HISTORY:
// 0.1.08 added formula for timeout based upon clockspeed
// 0.1.07 added support for DHT21
// 0.1.06 minimize footprint (2012-12-27)
// 0.1.05 fixed negative temperature bug (thanks to Roseman)
@ -22,7 +23,11 @@
#include "dht.h"
#define TIMEOUT (F_CPU/1600) // unsigned int in code, for higher CPU speeds this might exceed MAXINT.
// #define TIMEOUT 10000
// uint16_t for UNO, higher CPU speeds => exceed MAXINT.
// works for DUE
#define TIMEOUT (F_CPU/1600)
/////////////////////////////////////////////////////
//
@ -45,7 +50,7 @@ int dht::read11(uint8_t pin)
}
// CONVERT AND STORE
humidity = bits[0]; // bit[1] == 0;
humidity = bits[0]; // bits[1] == 0;
temperature = bits[2]; // bits[3] == 0;
// TEST CHECKSUM
@ -124,6 +129,7 @@ int dht::read(uint8_t pin)
delayMicroseconds(40);
pinMode(pin, INPUT);
// TODO rewrite with miros()?
// GET ACKNOWLEDGE or TIMEOUT
unsigned int loopCnt = TIMEOUT;
while(digitalRead(pin) == LOW)

4
libraries/DHTlib/dht.h
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@ -1,7 +1,7 @@
//
// FILE: dht.h
// AUTHOR: Rob Tillaart
// VERSION: 0.1.07
// VERSION: 0.1.08
// PURPOSE: DHT Temperature & Humidity Sensor library for Arduino
// URL: http://arduino.cc/playground/Main/DHTLib
//
@ -18,7 +18,7 @@
#include <Arduino.h>
#endif
#define DHT_LIB_VERSION "0.1.07"
#define DHT_LIB_VERSION "0.1.08"
#define DHTLIB_OK 0
#define DHTLIB_ERROR_CHECKSUM -1