From c0e12ffa54f6c4b22d4e109ed3bfeba003792bf7 Mon Sep 17 00:00:00 2001
From: dak664 <dak664>
Date: Thu, 11 Feb 2010 21:58:51 +0000
Subject: [PATCH] Enable ADC2 for optional external supply voltage measurement

---
 platform/avr-ravenlcd/temp.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/platform/avr-ravenlcd/temp.c b/platform/avr-ravenlcd/temp.c
index 72292abad..cf7c20c31 100644
--- a/platform/avr-ravenlcd/temp.c
+++ b/platform/avr-ravenlcd/temp.c
@@ -105,6 +105,7 @@ static int find_temp(int16_t value, uint16_t* array, int count);
 
 /**
  *   \brief This will initialize the digital IO and adc channel for temperture readings.
+ *   Optionally enable adc channel 2 for measurement of EXT_SUPL_SIG.
  *
  *   \retval 0 Place holder for returning status.
 */
@@ -124,6 +125,12 @@ temp_init(void)
     TEMP_DDR &= ~(1 << TEMP_BIT_IN);
     TEMP_PORT &= ~(1 << TEMP_BIT_IN);
 
+#if MEASURE_ADC2
+    DIDR0 |= (1 << ADC2D);
+    TEMP_DDR &= ~(1 << 2);
+    TEMP_PORT &= ~(1 << 2);
+#endif   
+
     temp_initialized = true;
 
     return 0;