1 files changed, 20 insertions, 0 deletions

diff --git a/src/settings.c b/src/settings.c
index b814e1a..2c698d1 100644
--- a/src/settings.c
+++ b/src/settings.c
@@ -13,8 +13,25 @@ draw_settings_cursor(void) {
     draw_line(x + 3, y + 5, x + 3, y + 5, COL_ACC_0);
 }
 
+void serial_irq(void);
+void stop_sound(void);
+void toggle_playing(void);
+
 void
 set_audio_settings(void) {
+    stop_sound();
+    if (settings.sync == SYNC_IN_LINK) {
+        irs_set(IRQ_SERIAL, serial_irq);
+        irs_set(IRQ_TIMER_2, NULL);
+        SIO_MODE = SIO_MODE_GP
+            | SIO_SC_OUT(0)
+            | SIO_SD_OUT(0)
+            | SIO_SI_OUT(0)
+            | SIO_SO_OUT(0)
+            | SIO_IRQ_ENABLE;
+    } else {
+        irs_set(IRQ_SERIAL, NULL);
+    }
     switch (settings.sync) {
         case SYNC_OUT_LINK_AUDIO_4:
         case SYNC_OUT_LINK_AUDIO_8:
@@ -121,4 +138,7 @@ handle_settings_input(void) {
     if (key_tap(KEY_A)) {
         next_scene = SCENE_SEQUENCER;
     }
+    if (key_tap(KEY_START)) {
+        toggle_playing();
+    }
 }