From 1ab6cd428c3b43a80ffac01f29ca0c27a438e3b1 Mon Sep 17 00:00:00 2001
From: Selene ToyKeeper
Date: Mon, 25 Nov 2019 18:41:24 -0700
Subject: calibrated Noctigon K1, changed voltage divider calibration values to
 10-bit (was 8-bit before)

---
 spaghetti-monster/fsm-adc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'spaghetti-monster/fsm-adc.c')

diff --git a/spaghetti-monster/fsm-adc.c b/spaghetti-monster/fsm-adc.c
index 9e52ab6..b8b00de 100644
--- a/spaghetti-monster/fsm-adc.c
+++ b/spaghetti-monster/fsm-adc.c
@@ -101,7 +101,7 @@ inline void ADC_off() {
 #ifdef USE_VOLTAGE_DIVIDER
 static inline uint8_t calc_voltage_divider(uint16_t value) {
     // use 9.7 fixed-point to get sufficient precision
-    uint16_t adc_per_volt = ((ADC_44<<7) - (ADC_22<<7)) / (44-22);
+    uint16_t adc_per_volt = ((ADC_44<<5) - (ADC_22<<5)) / (44-22);
     // incoming value is 8.2 fixed-point, so shift it 2 bits less
     uint8_t result = ((value<<5) / adc_per_volt) + VOLTAGE_FUDGE_FACTOR;
     return result;
-- 
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