From 48111bda207153b058d67f188ef2adc257f952ac Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sun, 29 Dec 2019 22:34:32 +0100
Subject: Set proper ADC reference selection

---
 sw/main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'sw')

diff --git a/sw/main.cpp b/sw/main.cpp
index 94a444a..c9ecd04 100644
--- a/sw/main.cpp
+++ b/sw/main.cpp
@@ -109,7 +109,7 @@ const uint32_t V_REF_mV = 5000;
 #define ADC_VALUE_TO_MILLIVOLT(val) ((uint32_t)val * V_REF_mV) / (uint32_t)(1<<10)
 
 // Use the LDO on Vref as ADC reference, set REFS1..REFS0 = 0b00, and ADC input 0
-#define SET_ADMUX(input) ADMUX = _BV(REFS0) | _BV(REFS1) | input
+#define SET_ADMUX(input) ADMUX = (input & 0x0F)
 
 /* Timer at approximately 100ms.
  *
-- 
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