added guhRF; added atmega256rfr2 support

platform/RaspBee/dev/adc.c

@@ -0,0 +1,84 @@
+/*
+* Copyright (c) 2012, BinaryLabs.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in the
+* documentation and/or other materials provided with the distribution.
+* 3. Neither the name of the Institute nor the names of its contributors
+* may be used to endorse or promote products derived from this software
+* without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*
+* @(#)$Id: adc.c,v 1.1 2010/08/25 19:34:06 nifi Exp $
+*/
+
+/**
+* \file
+* ADC file for Atmega128rfa1.
+* \author
+* Paulo Louro <paulolouro@binarylabs.dk>
+*/
+
+#include "adc.h"
+
+static uint8_t analog_reference = ADC_DEFAULT;
+
+/*
+ * For arduino interface for setting external reference voltage
+ * Note that applying an external voltage *and* then setting the analog
+ * reference to something internal will short the internal and the
+ * external reference voltage and most likely destroy the processor.
+ */
+void analogReference(uint8_t mode)
+{
+    analog_reference = mode;
+}
+
+int readADC(uint8_t pin)
+{
+  int result = 0;
+
+  adc_setup (analog_reference, pin);
+  result = adc_read ();
+  adc_fin ();
+  return result;
+}
+
+/**
+* \return Internal temperature in 0.01C, e.g. 25C is 2500
+*/
+int readInternalTemp(void)
+{
+  int reading = 0;
+
+  ADCSRB |= _BV(MUX5);
+  ADMUX = _BV(REFS1) | _BV(REFS0) | 0b1001 ;
+  ADCSRA = _BV(ADEN) | _BV(ADPS0) | _BV(ADPS2) ;
+
+  ADCSRA |= 1 << ADSC;
+  loop_until_bit_is_clear(ADCSRA,ADSC);
+  reading = ADC;
+
+  ADCSRB=0; //disable ADC, need to write B first for MUX5 bit
+  ADCSRA=0; //disable ADC
+  ADMUX=0; //turn off internal vref
+
+  return reading * 113 - 27280;
+}