6 files changed, 37 insertions, 10 deletions
diff --git a/hwdef-blf-lt1-t1616.h b/hwdef-blf-lt1-t1616.h
index a28ee0f..7c1f10b 100644
--- a/hwdef-blf-lt1-t1616.h
+++ b/hwdef-blf-lt1-t1616.h
@@ -68,6 +68,8 @@ enum channel_modes_e {
 #define DSM_INTFLAGS TCA0.SINGLE.INTFLAGS
 #define DSM_OVF_bm   TCA_SINGLE_OVF_bm
 
+#define DELAY_FACTOR 90  // less time in delay() because more time spent in interrupts
+
 // warm LEDs
 uint16_t ch1_dsm_lvl;
 uint8_t ch1_pwm, ch1_dsm;
diff --git a/hwdef-blf-lt1.c b/hwdef-blf-lt1.c
index 8a8af52..8a4c0e1 100644
--- a/hwdef-blf-lt1.c
+++ b/hwdef-blf-lt1.c
@@ -52,7 +52,7 @@ Channel channels[] = {
 void set_level_zero() {
     // disable timer 0 overflow interrupt
     // (helps improve button press handling from Off state)
-    TIMSK &= ~(1 << TOIE0);
+    DSM_INTCTRL &= ~DSM_OVF_bm;
 
     // turn off all LEDs
     ch1_dsm_lvl = 0;
@@ -72,14 +72,14 @@ void set_hw_levels(PWM_DATATYPE ch1, PWM_DATATYPE ch2) {
     CH1_PWM = ch1_pwm = ch1 >> 7;
     CH2_PWM = ch2_pwm = ch2 >> 7;
 
-    // enable timer 0 overflow interrupt so DSM can work
-    TIMSK |= (1 << TOIE0);
+    // enable timer overflow interrupt so DSM can work
+    DSM_INTCTRL |= DSM_OVF_bm;
 }
 
 // delta-sigma modulation of PWM outputs
-// happens on each Timer0 overflow (every 512 cpu clock cycles)
+// happens on each Timer overflow (every 512 cpu clock cycles)
 // uses 8-bit pwm w/ 7-bit dsm (0b 0PPP PPPP PDDD DDDD)
-ISR(TIMER0_OVF_vect) {
+ISR(DSM_vect) {
     // set new hardware values first,
     // for best timing (reduce effect of interrupt jitter)
     CH1_PWM = ch1_pwm;
diff --git a/hwdef-blf-lt1.h b/hwdef-blf-lt1.h
index 8fce09f..b113fd4 100644
--- a/hwdef-blf-lt1.h
+++ b/hwdef-blf-lt1.h
@@ -56,6 +56,13 @@ enum channel_modes_e {
 #define PWM_TOP_INIT  255
 #define DSM_TOP       (255<<7) // 15-bit resolution leaves 1 bit for carry
 
+// timer interrupt for DSM
+#define DSM_vect     TIMER0_OVF_vect
+#define DSM_INTCTRL  TIMSK
+#define DSM_OVF_bm   (1<<TOIE0)
+
+#define DELAY_FACTOR 90  // less time in delay() because more time spent in interrupts
+
 // warm LEDs
 uint16_t ch1_dsm_lvl;
 uint8_t ch1_pwm, ch1_dsm;
@@ -94,8 +101,8 @@ inline void hwdef_setup() {
     TCCR0B = 0x01; // pre-scaler for timer (1 => 1, 2 => 8, 3 => 64...)
     TCCR0A = PHASE;
 
-    // enable timer 0 overflow interrupt for DSM purposes
-    //TIMSK |= (1 << TOIE0);  // moved to hwdef.c functions instead
+    // enable timer overflow interrupt for DSM purposes
+    //DSM_INTCTRL |= DSM_OVF_bm;  // moved to hwdef.c functions instead
 
     // configure e-switch
     PORTB = (1 << SWITCH_PIN);  // e-switch is the only input
diff --git a/hwdef-emisar-d4k-3ch.c b/hwdef-emisar-d4k-3ch.c
index ba6643d..e35af08 100644
--- a/hwdef-emisar-d4k-3ch.c
+++ b/hwdef-emisar-d4k-3ch.c
@@ -78,6 +78,10 @@ StatePtr channel_3H_modes[NUM_CHANNEL_MODES] = {
 };
 
 void set_level_zero() {
+    // disable timer overflow interrupt
+    // (helps improve button press handling from Off state)
+    DSM_INTCTRL &= ~DSM_OVF_bm;
+
     // turn off all LEDs
     MAIN2_ENABLE_PORT &= ~(1 << MAIN2_ENABLE_PIN);
     LED3_ENABLE_PORT  &= ~(1 << LED3_ENABLE_PIN );
@@ -123,14 +127,18 @@ void set_hw_levels(PWM_DATATYPE main2, // brightness, 0 to DSM_TOP
     MAIN2_PWM_LVL = main2_pwm = main2 >> 7;
     LED3_PWM_LVL  = led3_pwm  = led3  >> 7;
     LED4_PWM_LVL  = led4_pwm  = led4  >> 7;
+
+    // enable timer overflow interrupt so DSM can work
+    DSM_INTCTRL |= DSM_OVF_bm;
+
     // force phase reset
     PWM_CNT       = PWM_CNT2  = 0;
 }
 
 // delta-sigma modulation of PWM outputs
-// happens on each Timer0 overflow (every 512 cpu clock cycles)
+// happens on each Timer overflow (every 512 cpu clock cycles)
 // uses 8-bit pwm w/ 7-bit dsm (0b 0PPP PPPP PDDD DDDD)
-ISR(TIMER0_OVF_vect) {
+ISR(DSM_vect) {
     // set new hardware values first,
     // for best timing (reduce effect of interrupt jitter)
     MAIN2_PWM_LVL = main2_pwm;
diff --git a/hwdef-emisar-d4k-3ch.h b/hwdef-emisar-d4k-3ch.h
index 581f51c..2e83fbe 100644
--- a/hwdef-emisar-d4k-3ch.h
+++ b/hwdef-emisar-d4k-3ch.h
@@ -94,6 +94,13 @@ enum channel_modes_e {
 // (max is (255 << 7), because it's 8-bit PWM plus 7 bits of DSM)
 #define DSM_TOP       (255<<7) // 15-bit resolution leaves 1 bit for carry
 
+// timer interrupt for DSM
+#define DSM_vect     TIMER0_OVF_vect
+#define DSM_INTCTRL  TIMSK
+#define DSM_OVF_bm   (1<<TOIE0)
+
+#define DELAY_FACTOR 90  // less time in delay() because more time spent in interrupts
+
 // main 2 LEDs / 1st channel (2 LEDs)
 uint16_t main2_dsm_lvl;
 uint8_t main2_pwm, main2_dsm;
@@ -228,7 +235,8 @@ inline void hwdef_setup() {
             ;
 
     // set up interrupt for delta-sigma modulation
-    TIMSK |= (1<<TOIE0);  // interrupt once for each timer 0 cycle
+    // (moved to hwdef.c functions so it can be enabled/disabled based on ramp level)
+    //DSM_INTCTRL |= DSM_OVF_bm;  // interrupt once for each timer cycle
 
     // set up e-switch
     SWITCH_PUE = (1 << SWITCH_PIN);  // pull-up for e-switch
diff --git a/hwdef-noctigon-m44.h b/hwdef-noctigon-m44.h
index 094e555..5658c9f 100644
--- a/hwdef-noctigon-m44.h
+++ b/hwdef-noctigon-m44.h
@@ -85,6 +85,8 @@ enum channel_modes_e {
 #define DSM_INTCTRL  TIMSK
 #define DSM_OVF_bm   (1<<TOIE1)
 
+#define DELAY_FACTOR 90  // less time in delay() because more time spent in interrupts
+
 // 1st channel (8 LEDs)
 uint16_t ch1_dsm_lvl;
 uint8_t ch1_pwm, ch1_dsm;