From dc53af3f01c0cbaefe4b330e2dcc2396b5afde47 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Tue, 30 May 2023 21:30:44 +0200
Subject: Add initial audio sync

---
 src/sequencer.c | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

(limited to 'src/sequencer.c')

diff --git a/src/sequencer.c b/src/sequencer.c
index b295730..d8c5f3f 100644
--- a/src/sequencer.c
+++ b/src/sequencer.c
@@ -26,9 +26,9 @@ gate_off(void) {
         | SIO_SI_OUT(0)
         | SIO_SO_OUT(1)
         | SIO_SC(0)
-        | SIO_SD(1)
+        | SIO_SD(0)
         | SIO_SO(0);
-    TIMER_CTRL_1 = 0;
+    TIMER_CTRL_3 = 0;
 }
 
 void
@@ -39,12 +39,13 @@ gate_on(void) {
         | SIO_SI_OUT(0)
         | SIO_SO_OUT(1)
         | SIO_SC(1)
-        | SIO_SD(1)
-        | SIO_SO(0);
+        | SIO_SD(0)
+        | SIO_SO(1);
     int n_ticks = -244181 / 600;
-    irs_set(IRQ_TIMER_1, gate_off);
-    TIMER_DATA_1 = n_ticks;
-    TIMER_CTRL_1 = TIMER_CTRL_IRQ | TIMER_CTRL_ENABLE | TIMER_CTRL_FREQ_3;
+    irs_set(IRQ_TIMER_3, gate_off);
+    TIMER_DATA_3 = n_ticks;
+    TIMER_CTRL_3 = TIMER_CTRL_IRQ | TIMER_CTRL_ENABLE | TIMER_CTRL_FREQ_3;
+    audio_sync_click = true;
 }
 
 void
@@ -183,9 +184,9 @@ set_time(int bpm) {
     // We have to operate on integer values, so the numbers have been
     // precalculated to `n_ticks = 244181 / bmp`
     int n_ticks = -244181 / bpm;
-    irs_set(IRQ_TIMER_0, play_step);
-    TIMER_DATA_0 = n_ticks;
-    TIMER_CTRL_0 = TIMER_CTRL_IRQ | TIMER_CTRL_ENABLE | TIMER_CTRL_FREQ_3;
+    irs_set(IRQ_TIMER_2, play_step);
+    TIMER_DATA_2 = n_ticks;
+    TIMER_CTRL_2 = TIMER_CTRL_IRQ | TIMER_CTRL_ENABLE | TIMER_CTRL_FREQ_3;
 }
 
 TriggerNote *
@@ -296,7 +297,7 @@ void
 stop_playing(void) {
     play_status = 0;
     step_counter = 0;
-    TIMER_CTRL_0 = 0;
+    TIMER_CTRL_2 = 0;
     SOUND_SQUARE1_CTRL = 0;
     SOUND_SQUARE2_CTRL = 0;
     SOUND_WAVE_CTRL = 0;
@@ -308,7 +309,7 @@ void
 toggle_playing(void) {
     play_status ^= 1;
     step_counter = 0;
-    if ((TIMER_CTRL_0 & TIMER_CTRL_ENABLE) == 0) {
+    if ((TIMER_CTRL_2 & TIMER_CTRL_ENABLE) == 0) {
         if (current_pattern != next_pattern) {
             current_pattern = next_pattern;
             redraw_pattern_buttons = true;
@@ -316,7 +317,7 @@ toggle_playing(void) {
         set_time(patterns[current_pattern].bpm);
         play_step();
     } else {
-        TIMER_CTRL_0 ^= TIMER_CTRL_ENABLE;
+        TIMER_CTRL_2 ^= TIMER_CTRL_ENABLE;
         SOUND_SQUARE1_CTRL = 0;
         SOUND_SQUARE2_CTRL = 0;
         SOUND_WAVE_CTRL = 0;
@@ -328,7 +329,7 @@ toggle_playing(void) {
 void
 pause_playing(void) {
     play_status ^= 1;
-    if ((TIMER_CTRL_0 & TIMER_CTRL_ENABLE) == 0) {
+    if ((TIMER_CTRL_2 & TIMER_CTRL_ENABLE) == 0) {
         if (current_pattern != next_pattern && step_counter == 0) {
             current_pattern = next_pattern;
             redraw_pattern_buttons = true;
@@ -336,7 +337,7 @@ pause_playing(void) {
         set_time(patterns[current_pattern].bpm);
         play_step();
     } else {
-        TIMER_CTRL_0 ^= TIMER_CTRL_ENABLE;
+        TIMER_CTRL_2 ^= TIMER_CTRL_ENABLE;
         SOUND_SQUARE1_CTRL = 0;
         SOUND_SQUARE2_CTRL = 0;
         SOUND_WAVE_CTRL = 0;
@@ -414,7 +415,7 @@ handle_right_col_selection(void) {
                         patterns[pattern_selection_loc].bpm + bpm_inc,
                         10,
                         300);
-                if ((TIMER_CTRL_0 & TIMER_CTRL_ENABLE) != 0
+                if ((TIMER_CTRL_2 & TIMER_CTRL_ENABLE) != 0
                         && current_pattern == pattern_selection_loc) {
                     set_time(patterns[current_pattern].bpm);
                 }
@@ -432,7 +433,7 @@ handle_right_col_selection(void) {
                         patterns[pattern_selection_loc].bpm + bpm_inc,
                         10,
                         300);
-                if ((TIMER_CTRL_0 & TIMER_CTRL_ENABLE) != 0
+                if ((TIMER_CTRL_2 & TIMER_CTRL_ENABLE) != 0
                         && current_pattern == pattern_selection_loc) {
                     set_time(patterns[current_pattern].bpm);
                 }
@@ -1036,5 +1037,5 @@ sequencer_init(void) {
             | SOUND_SQUARE2
             | SOUND_WAVE
             | SOUND_NOISE, 3);
-    SOUND_DSOUND_MASTER = SOUND_DMG100;
+    init_dsound();
 }
-- 
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