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| author | Jack Humbert <jack.humb@gmail.com> | 2016-04-17 02:26:02 +0200 |
|---|---|---|
| committer | Jack Humbert <jack.humb@gmail.com> | 2016-04-17 02:26:02 +0200 |
| commit | c83aa16f1d614c1c10f7597a67ffb9f2ae871951 (patch) | |
| tree | 6d61c4f255c4ddbc98085a9758693a877e5190b5 /quantum | |
| parent | b8d2e66638409066661e7dd3c66473d583256ec5 (diff) | |
| download | qmk_firmware-c83aa16f1d614c1c10f7597a67ffb9f2ae871951.tar.gz qmk_firmware-c83aa16f1d614c1c10f7597a67ffb9f2ae871951.tar.xz | |
fixes audio prescaler to emit correct freq
Diffstat (limited to 'quantum')
| -rw-r--r-- | quantum/audio.c | 12 | ||||
| -rw-r--r-- | quantum/keymap_common.c | 6 |
2 files changed, 10 insertions, 8 deletions
diff --git a/quantum/audio.c b/quantum/audio.c index 5edcccdbe..470dc8e0c 100644 --- a/quantum/audio.c +++ b/quantum/audio.c @@ -12,6 +12,8 @@ #define PI 3.14159265 +#define CPU_PRESCALER 8 + // #define PWM_AUDIO #ifdef PWM_AUDIO @@ -244,12 +246,12 @@ ISR(TIMER3_COMPA_vect) { // ICR3 = (int)(((double)F_CPU) / frequency); // Set max to the period // OCR3A = (int)(((double)F_CPU) / frequency) >> 1; // Set compare to half the period voice_place %= voices; - if (place > (frequencies[voice_place] / 500)) { + if (place > (frequencies[voice_place] / 50)) { 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 * duty_place; // Set compare to half the period + ICR3 = (int)(((double)F_CPU) / (frequencies[voice_place] * CPU_PRESCALER)); // Set max to the period + OCR3A = (int)(((double)F_CPU) / (frequencies[voice_place] * CPU_PRESCALER)) >> 1 * duty_place; // Set compare to half the period place++; // if (duty_counter > (frequencies[voice_place] / 500)) { // duty_place = (duty_place % 3) + 1; @@ -281,8 +283,8 @@ ISR(TIMER3_COMPA_vect) { place -= SINE_LENGTH; #else 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 + ICR3 = (int)(((double)F_CPU) / (note_frequency * CPU_PRESCALER)); // Set max to the period + OCR3A = (int)(((double)F_CPU) / (note_frequency * CPU_PRESCALER)) >> 1; // Set compare to half the period } else { ICR3 = 0; OCR3A = 0; diff --git a/quantum/keymap_common.c b/quantum/keymap_common.c index b91916685..899437f44 100644 --- a/quantum/keymap_common.c +++ b/quantum/keymap_common.c @@ -35,9 +35,9 @@ extern keymap_config_t keymap_config; #include "audio.h" float goodbye[][2] = { - {440.0*pow(2.0,(67)/12.0), 8}, - {440.0*pow(2.0,(60)/12.0), 8}, - {440.0*pow(2.0,(55)/12.0), 12}, + {440.0*pow(2.0,(31)/12.0), 8}, + {440.0*pow(2.0,(24)/12.0), 8}, + {440.0*pow(2.0,(19)/12.0), 12}, }; #endif |