From 300ca4c16a45ef129a65a5520eab068f1f74c29b Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Wed, 31 May 2023 18:21:30 +0200
Subject: Add link cable sync in

---
 src/sequencer.c | 46 ++++++++++++++++++++++++++++++++++------------
 1 file changed, 34 insertions(+), 12 deletions(-)

(limited to 'src/sequencer.c')

diff --git a/src/sequencer.c b/src/sequencer.c
index 2ee6b07..5120805 100644
--- a/src/sequencer.c
+++ b/src/sequencer.c
@@ -182,6 +182,9 @@ play_step(void) {
 
 void
 set_time(int bpm) {
+    if (settings.sync == SYNC_IN_LINK) {
+        return;
+    }
     // The number of ticks of a 1024 cycle clock in a step based on the BPM can
     // be calculated as:
     //     X bpm -> 60000 / 4 / bpm = Y ms = Ye-3 s
@@ -299,9 +302,8 @@ handle_channel_selection(void) {
 }
 
 void
-stop_playing(void) {
+stop_sound(void) {
     play_status = 0;
-    step_counter = 0;
     TIMER_CTRL_2 = 0;
     SOUND_SQUARE1_CTRL = 0;
     SOUND_SQUARE2_CTRL = 0;
@@ -310,10 +312,25 @@ stop_playing(void) {
     redraw_play_pause = true;
 }
 
+void
+stop_playing(void) {
+    step_counter = 0;
+    stop_sound();
+}
+
 void
 toggle_playing(void) {
     play_status ^= 1;
     step_counter = 0;
+    SOUND_SQUARE1_CTRL = 0;
+    SOUND_SQUARE2_CTRL = 0;
+    SOUND_WAVE_CTRL = 0;
+    SOUND_NOISE_CTRL = 0;
+    redraw_play_pause = true;
+    if (settings.sync == SYNC_IN_LINK) {
+        return;
+    }
+
     if ((TIMER_CTRL_2 & TIMER_CTRL_ENABLE) == 0) {
         if (current_pattern != next_pattern) {
             current_pattern = next_pattern;
@@ -323,17 +340,20 @@ toggle_playing(void) {
         play_step();
     } else {
         TIMER_CTRL_2 ^= TIMER_CTRL_ENABLE;
-        SOUND_SQUARE1_CTRL = 0;
-        SOUND_SQUARE2_CTRL = 0;
-        SOUND_WAVE_CTRL = 0;
-        SOUND_NOISE_CTRL = 0;
     }
-    redraw_play_pause = true;
 }
 
 void
 pause_playing(void) {
     play_status ^= 1;
+    SOUND_SQUARE1_CTRL = 0;
+    SOUND_SQUARE2_CTRL = 0;
+    SOUND_WAVE_CTRL = 0;
+    SOUND_NOISE_CTRL = 0;
+    redraw_play_pause = true;
+    if (settings.sync == SYNC_IN_LINK) {
+        return;
+    }
     if ((TIMER_CTRL_2 & TIMER_CTRL_ENABLE) == 0) {
         if (current_pattern != next_pattern && step_counter == 0) {
             current_pattern = next_pattern;
@@ -343,12 +363,7 @@ pause_playing(void) {
         play_step();
     } else {
         TIMER_CTRL_2 ^= TIMER_CTRL_ENABLE;
-        SOUND_SQUARE1_CTRL = 0;
-        SOUND_SQUARE2_CTRL = 0;
-        SOUND_WAVE_CTRL = 0;
-        SOUND_NOISE_CTRL = 0;
     }
-    redraw_play_pause = true;
 }
 
 void
@@ -1006,6 +1021,13 @@ handle_sequencer_input(void) {
     }
 }
 
+void
+serial_irq() {
+    if (play_status) {
+        play_step();
+    }
+}
+
 void
 sequencer_init(void) {
     stop_playing();
-- 
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