bypass _delay_ms and user timer instead for silent note

1 files changed, 13 insertions, 1 deletions

diff --git a/notes.c b/notes.c
index 44b24c0..8d082ad 100644
--- a/notes.c
+++ b/notes.c
@@ -196,7 +196,19 @@ play_note(unsigned char _note, unsigned short _cycles)
                 for (unsigned short i = 0; i < _cycles; i++)
                         playtone();
         } else {
-                _delay_ms(_cycles);
+                // when note is 255, don't play anything for _cycles ms
+                // Prepare Timer/Counter
+                TCNT1 = 1;
+                OCR1A = 16e3 * _cycles / T1_PRESCALAR;
+                TCCR1B |= 1 << CS11;
+
+                // Monitor OutPut Compare Flag
+                while ((TIFR1 & (1 << OCF1A)) == 0);
+
+                // Toggles port For Speaker
+                PORTD ^= 1 << P_SPKR;
+                TIFR1 |= 1 << OCF1A;
+                TCCR1B &= ~(1 << CS11);
         }
 }