added guhRF; added atmega256rfr2 support

platform/RaspBee/dev/dht11.h

@@ -0,0 +1,67 @@
+/*
+ DHT-11 Library
+ (c) Created by Charalampos Andrianakis on 18/12/11.
+ 
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+ 
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <avr/io.h>
+#include <util/delay.h>
+
+/* DHT 1-wire is at PortE.6 */
+#define DHT_PIN_READ PINE
+#define DHT_PIN_MASK _BV(PE6)
+#define DHT_PxOUT PORTE
+#define DHT_PxDIR DDRE
+
+#define SET_PIN_INPUT() (DHT_PxDIR &= ~DHT_PIN_MASK)
+#define SET_PIN_OUTPUT() (DHT_PxDIR |= DHT_PIN_MASK)
+
+#define OUTP_0() (DHT_PxOUT &= ~DHT_PIN_MASK)
+#define OUTP_1() (DHT_PxOUT |= DHT_PIN_MASK) 
+
+#define PIN_INIT() do{  \
+                     SET_PIN_INPUT();    \
+                     OUTP_0();           \
+                   } while(0)
+
+
+/* Drive the one wire interface hight */
+#define DHT_DRIVE() do {                    \
+                     SET_PIN_OUTPUT();     \
+                     OUTP_1();             \
+                   } while (0)
+
+/* Release the one wire by turning on the internal pull-up. */
+#define DHT_RELEASE() do {                  \
+                       SET_PIN_INPUT();    \
+                       OUTP_1();           \
+                     } while (0)
+
+/* Read one bit. */
+#define DHT_INP()  (DHT_PIN_READ & DHT_PIN_MASK)
+
+//The packet size is 40bit but each bit consists of low and high state
+//so 40 x 2 = 80 transitions. Also we have 2 transistions DHT response
+//and 2 transitions which indicates End Of Frame. In total 84
+#define MAXTIMINGS  84
+
+//This is the main function which requests and reads the packet
+uint8_t DHT_Read_Data(uint16_t *temperature, uint16_t *humidity);