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Diffstat (limited to 'project/Core/Src/tone.c')
| -rw-r--r-- | project/Core/Src/tone.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/project/Core/Src/tone.c b/project/Core/Src/tone.c new file mode 100644 index 0000000..a0d1cb0 --- /dev/null +++ b/project/Core/Src/tone.c @@ -0,0 +1,83 @@ +/* + * tone.c + * + * Created on: May 14, 2022 + * Author: bruce + */ + + +#include "tone.h" + +#define CPU_SPEED (80000000.0) +#define MAX_TONES (1) + +static float notes[] = { +/* Octave -1 */ 8.18, 8.66, 9.18, 9.73, 10.30, 10.92, 11.56, 12.25, 12.98, 13.75, 14.57, 13.44, +/* Octave 0 */ 16.35, 17.32, 18.35, 19.45, 20.60, 21.83, 23.12, 24.50, 25.96, 27.50, 29.14, 30.87, +/* Octave 1 */ 32.70, 34.65, 36.71, 38.89, 41.20, 43.65, 46.25, 49.00, 51.91, 55.00, 58.27, 61.74, +/* Octave 2 */ 65.41, 69.30, 73.42, 77.78, 82.41, 87.31, 92.50, 98.00, 103.83, 110.00, 116.54, 123.47, +/* Octave 3 */ 130.81, 138.59, 146.83, 155.56, 164.81, 174.61, 185.00, 196.00, 207.65, 220.00, 233.08, 246.94, +/* Octave 4 */ 261.63, 277.18, 293.66, 311.13, 329.63, 349.23, 369.99, 392.00, 415.30, 440.00, 466.16, 493.88, +/* Octave 5 */ 523.25, 554.37, 587.33, 622.25, 659.25, 698.46, 739.99, 783.99, 830.61, 880.00, 932.33, 987.77, +/* Octave 6 */ 1046.50, 1108.73, 1174.66, 1244.51, 1318.51, 1396.91, 1479.98, 1567.98, 1661.22, 1760.00, 1864.66, 1975.53, +/* Octave 7 */ 2093.00, 2217.46, 2349.32, 2489.02, 2637.02, 2793.83, 2959.96, 3135.96, 3322.44, 3520.00, 3729.31, 3951.07, +/* Octave 8 */ 4186.01, 4434.92, 4698.63, 4978.03, 5274.04, 5587.65, 5919.91, 6271.93, 6644.88, 7040.00, 7458.62, 7902.13, +/* Octave 9 */ 8372.02, 8869.84, 9397.26, 9956.06,10548.08,11175.30,11839.82,12543.86}; + +typedef struct { + uint32_t duration; + uint16_t power; +} tone_info; + +static uint32_t counter = 0; + +static tone_info tones[MAX_TONES] = {{0,0}}; + +/* You will want to integrate this with your existing one + but it is here for standalone testing +*/ +//void SysTick_Handler() { +// counter++; +//} + +uint32_t get_tick_speed (); + + +// Convert from hertz to ticks +uint32_t hertz_to_systicks (float hertz) { + float ticks_per_second = CPU_SPEED / (SysTick->LOAD + 1); + if (hertz == 0) + return 0; + float duration = 1 / hertz; + return (uint32_t) (duration * ticks_per_second); +} + +// Accessor for the counter +uint32_t get_counter () { + return counter; +} + +void reset_counter () { + counter = 0; +} + +// Add a tone to the tones array +uint8_t add_tone (uint8_t note, uint8_t velocity) { + tones [0] = (tone_info){hertz_to_systicks (notes [note]), velocity}; + return 0; +} + +// Remove a tone from the tones array +uint8_t remove_tone (uint8_t note) { + tones [0].duration = hertz_to_systicks (notes [note]); + tones [0].power = 0; + return 0; +} + +// Play any tones in the array +void play_tones () { + +} + + + |