Adding Musical Notes

[qmk_firmware.git] / quantum / audio.c

diff --git a/quantum/audio.c b/quantum/audio.c
index 3a3a1a491062961a724d2de4ea10d641630098f8..5edcccdbe10784813b88ceb8183a9ffdc9f5a93a 100644 (file)
--- a/quantum/audio.c
+++ b/quantum/audio.c
@@ -8,6 +8,8 @@
 #include "audio.h"
 #include "keymap_common.h"
 
+#include "eeconfig.h"
+
 #define PI 3.14159265
 
 // #define PWM_AUDIO
@@ -30,6 +32,8 @@ int voice_place = 0;
 double frequency = 0;
 int volume = 0;
 long position = 0;
+int duty_place = 1;
+int duty_counter = 0;
 
 double frequencies[8] = {0, 0, 0, 0, 0, 0, 0, 0};
 int volumes[8] = {0, 0, 0, 0, 0, 0, 0, 0};
@@ -57,6 +61,25 @@ uint8_t notes_length;
 bool notes_repeat;
 uint8_t current_note = 0;
 
+audio_config_t audio_config;
+
+
+void audio_toggle(void) {
+    audio_config.enable ^= 1;
+    eeconfig_write_audio(audio_config.raw);
+}
+
+void audio_on(void) {
+    audio_config.enable = 1;
+    eeconfig_write_audio(audio_config.raw);
+}
+
+void audio_off(void) {
+    audio_config.enable = 0;
+    eeconfig_write_audio(audio_config.raw);
+}
+
+
 void stop_all_notes() {
     voices = 0;
     #ifdef PWM_AUDIO
@@ -77,58 +100,66 @@ void stop_all_notes() {
 }
 
 void stop_note(double freq) {
-    #ifdef PWM_AUDIO
-        freq = freq / SAMPLE_RATE;
-    #endif
-    for (int i = 7; i >= 0; i--) {
-        if (frequencies[i] == freq) {
-            frequencies[i] = 0;
-            volumes[i] = 0;
-            for (int j = i; (j < 7); j++) {
-                frequencies[j] = frequencies[j+1];
-                frequencies[j+1] = 0;
-                volumes[j] = volumes[j+1];
-                volumes[j+1] = 0;
-            }
-        }
-    }
-    voices--;
-    if (voices < 0)
-        voices = 0;
-    if (voices == 0) {
+    if (note) {
         #ifdef PWM_AUDIO
-            TIMSK3 &= ~_BV(OCIE3A);
-        #else
-            TIMSK3 &= ~_BV(OCIE3A);
-            TCCR3A &= ~_BV(COM3A1);
+            freq = freq / SAMPLE_RATE;
         #endif
-        frequency = 0;
-        volume = 0;
-        note = false;
-    } else {
-        double freq = frequencies[voices - 1];
-        int vol = volumes[voices - 1];
-        double starting_f = frequency;
-        if (frequency < freq) {
-            sliding = true;
-            for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 2000.0)) {
-                frequency = f;
+        for (int i = 7; i >= 0; i--) {
+            if (frequencies[i] == freq) {
+                frequencies[i] = 0;
+                volumes[i] = 0;
+                for (int j = i; (j < 7); j++) {
+                    frequencies[j] = frequencies[j+1];
+                    frequencies[j+1] = 0;
+                    volumes[j] = volumes[j+1];
+                    volumes[j+1] = 0;
+                }
             }
-            sliding = false;
-        } else if (frequency > freq) {
-            sliding = true;
-            for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 2000.0)) {
-                frequency = f;
+        }
+        voices--;
+        if (voices < 0)
+            voices = 0;
+        if (voices == 0) {
+            #ifdef PWM_AUDIO
+                TIMSK3 &= ~_BV(OCIE3A);
+            #else
+                TIMSK3 &= ~_BV(OCIE3A);
+                TCCR3A &= ~_BV(COM3A1);
+            #endif
+            frequency = 0;
+            volume = 0;
+            note = false;
+        } else {
+            double freq = frequencies[voices - 1];
+            int vol = volumes[voices - 1];
+            double starting_f = frequency;
+            if (frequency < freq) {
+                sliding = true;
+                for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 2000.0)) {
+                    frequency = f;
+                }
+                sliding = false;
+            } else if (frequency > freq) {
+                sliding = true;
+                for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 2000.0)) {
+                    frequency = f;
+                }
+                sliding = false;
             }
-            sliding = false;
+            frequency = freq;
+            volume = vol;
         }
-        frequency = freq;
-        volume = vol;
     }
 }
 
 void init_notes() {
 
+    /* check signature */
+    if (!eeconfig_is_enabled()) {
+        eeconfig_init();
+    }
+    audio_config.raw = eeconfig_read_audio();
+
     #ifdef PWM_AUDIO
         PLLFRQ = _BV(PDIV2);
         PLLCSR = _BV(PLLE);
@@ -160,7 +191,6 @@ void init_notes() {
 
 
 ISR(TIMER3_COMPA_vect) {
-
     if (note) {
         #ifdef PWM_AUDIO
             if (voices == 1) {
@@ -213,13 +243,19 @@ ISR(TIMER3_COMPA_vect) {
             if (frequency > 0) {
                 // ICR3 = (int)(((double)F_CPU) / frequency); // Set max to the period
                 // OCR3A = (int)(((double)F_CPU) / frequency) >> 1; // Set compare to half the period
-                if (place > 10) {
+                voice_place %= voices;
+                if (place > (frequencies[voice_place] / 500)) {
                     voice_place = (voice_place + 1) % voices;
                     place = 0.0;
                 }
                 ICR3 = (int)(((double)F_CPU) / frequencies[voice_place]); // Set max to the period
-                OCR3A = (int)(((double)F_CPU) / frequencies[voice_place]) >> 1; // Set compare to half the period
+                OCR3A = (int)(((double)F_CPU) / frequencies[voice_place]) >> 1 * duty_place; // Set compare to half the period
                 place++;
+                // if (duty_counter > (frequencies[voice_place] / 500)) {
+                //     duty_place = (duty_place % 3) + 1;
+                //     duty_counter = 0;
+                // }
+                // duty_counter++;
             }
         #endif
     }
@@ -247,12 +283,20 @@ ISR(TIMER3_COMPA_vect) {
             if (note_frequency > 0) {
                 ICR3 = (int)(((double)F_CPU) / note_frequency); // Set max to the period
                 OCR3A = (int)(((double)F_CPU) / note_frequency) >> 1; // Set compare to half the period
+            } else {
+                ICR3 = 0;
+                OCR3A = 0;
             }
         #endif
 
 
         note_position++;
-        if (note_position >= note_length) {
+        bool end_of_note = false;
+        if (ICR3 > 0) 
+            end_of_note = (note_position >= (note_length / ICR3 * 0xFFFF));
+        else 
+            end_of_note = (note_position >= (note_length * 0x7FF));
+        if (end_of_note) {
             current_note++;
             if (current_note >= notes_length) {
                 if (notes_repeat) {
@@ -280,9 +324,16 @@ ISR(TIMER3_COMPA_vect) {
 
     }
 
+    if (!audio_config.enable) {
+        notes = false;
+        note = false;
+    }
 }
 
 void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat) {
+
+if (audio_config.enable) {
+
     if (note)
         stop_all_notes();
     notes = true;
@@ -311,7 +362,12 @@ void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat) {
     #endif
 }
 
+}
+
 void play_sample(uint8_t * s, uint16_t l, bool r) {
+
+if (audio_config.enable) {
+
     stop_all_notes();
     place_int = 0;
     sample = s;
@@ -322,9 +378,15 @@ void play_sample(uint8_t * s, uint16_t l, bool r) {
         TIMSK3 |= _BV(OCIE3A);
     #else
     #endif
+
+}
+
 }
 
 void play_note(double freq, int vol) {
+
+if (audio_config.enable && voices < 8) {
+
     if (notes)
         stop_all_notes();
     note = true;
@@ -359,4 +421,6 @@ void play_note(double freq, int vol) {
         TCCR3A |= _BV(COM3A1);
     #endif
 
+}
+
 }
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