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-rw-r--r--Sprinter/heater.cpp4
-rw-r--r--Sprinter/heater.h2
2 files changed, 3 insertions, 3 deletions
diff --git a/Sprinter/heater.cpp b/Sprinter/heater.cpp
index 65f52e4..9d494b2 100644
--- a/Sprinter/heater.cpp
+++ b/Sprinter/heater.cpp
@@ -48,7 +48,7 @@ int current_bed_raw = 0;
unsigned long previous_millis_heater, previous_millis_bed_heater, previous_millis_monitor;
#ifdef PIDTEMP
- int g_heater_pwm_val = 0;
+ volatile unsigned char g_heater_pwm_val = 0;
unsigned char PWM_off_time = 0;
unsigned char PWM_out_on = 0;
@@ -402,7 +402,7 @@ int read_max6675()
heater_duty = constrain(heater_duty, 0, HEATER_CURRENT);
#ifdef PID_SOFT_PWM
- g_heater_pwm_val = heater_duty;
+ g_heater_pwm_val = (unsigned char)heater_duty;
#else
analogWrite(HEATER_0_PIN, heater_duty);
diff --git a/Sprinter/heater.h b/Sprinter/heater.h
index 5470a4f..a1d2917 100644
--- a/Sprinter/heater.h
+++ b/Sprinter/heater.h
@@ -75,7 +75,7 @@ extern unsigned long previous_millis_heater, previous_millis_bed_heater;
extern unsigned char manage_monitor;
#ifdef PIDTEMP
- extern int g_heater_pwm_val;
+ extern volatile unsigned char g_heater_pwm_val;
extern unsigned char PWM_off_time;
extern unsigned char PWM_out_on;