From 7b49797be1da97f54e9df3a1b0342ab20d7f02d5 Mon Sep 17 00:00:00 2001
From: Selene ToyKeeper
Date: Wed, 27 Mar 2024 07:13:26 -0600
Subject: increased voltage precision from 0.025V to 0.02V (so 0 to 255 now
 goes from 0.00V to 5.10V)

---
 fsm/adc.h | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'fsm/adc.h')

diff --git a/fsm/adc.h b/fsm/adc.h
index f66bf34..5dec6c5 100644
--- a/fsm/adc.h
+++ b/fsm/adc.h
@@ -4,6 +4,10 @@
 
 #pragma once
 
+// voltage is 0.00V to 5.10V in 0.02V steps, from 0 to 255
+// so one deci-Volt is 5 steps
+#define dV 5
+
 #if defined(USE_LVP) || defined(USE_THERMAL_REGULATION)
 // use raw value instead of lowpassed value for the next N measurements
 // (2 = 1 for voltage + 1 for temperature)
@@ -15,13 +19,13 @@ volatile uint8_t adc_reset = 2;
 #ifndef VOLTAGE_WARNING_SECONDS
 #define VOLTAGE_WARNING_SECONDS 5
 #endif
-// low-battery threshold in volts * 40
+// low-battery threshold in volts * 50
 #ifndef VOLTAGE_LOW
-#define VOLTAGE_LOW (4*29)
+#define VOLTAGE_LOW (29*dV)
 #endif
 // battery is low but not critical
 #ifndef VOLTAGE_RED
-#define VOLTAGE_RED (4*33)
+#define VOLTAGE_RED (33*dV)
 #endif
 // MCU sees voltage 0.X volts lower than actual, add X/2 to readings
 #ifndef VOLTAGE_FUDGE_FACTOR
-- 
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