From 1447932067ca39d50c204ad5df5f9cbc1e35ef6d Mon Sep 17 00:00:00 2001
From: Selene ToyKeeper
Date: Fri, 21 Oct 2022 08:53:10 -0600
Subject: fixed voltage calibration resolution on SP10 Pro and other devices
 which use a voltage divider (it was 0.1V per step, and is now 0.05V per step)

---
 spaghetti-monster/fsm-adc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spaghetti-monster/fsm-adc.c b/spaghetti-monster/fsm-adc.c
index c5401ea..ce7a31c 100644
--- a/spaghetti-monster/fsm-adc.c
+++ b/spaghetti-monster/fsm-adc.c
@@ -146,12 +146,12 @@ 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<<5) - (ADC_22<<5)) / (44-22);
     // shift incoming value into a matching position
-    uint8_t result = ((value>>1) / adc_per_volt)
+    uint8_t result = ((value / adc_per_volt)
                      + VOLTAGE_FUDGE_FACTOR
                      #ifdef USE_VOLTAGE_CORRECTION
                      + voltage_correction - 7
                      #endif
-                     ;
+                     ) >> 1;
     return result;
 }
 #endif
-- 
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