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Add function to play audio from CAN frames, no polyphony

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Aadi Desai 2023-06-04 13:45:17 +01:00
parent 8e534f9858
commit 6d670dc903
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1 changed files with 47 additions and 0 deletions
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demo/main.cpp
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@ -105,6 +105,9 @@ static void help(void) {
puts("can_mask - Get / Set CAN Mask"); puts("can_mask - Get / Set CAN Mask");
puts("can_read - Receive CAN Frames and print (delay in s)"); puts("can_read - Receive CAN Frames and print (delay in s)");
puts("can_watch - Watch CAN Frames at 2Hz"); puts("can_watch - Watch CAN Frames at 2Hz");
#ifdef CSR_AUDIO_BASE
puts("can_listen - Play CAN Frames as Audio");
#endif
#endif #endif
} }
@ -294,6 +297,46 @@ static void can_watch_cmd() {
busy_wait(200); busy_wait(200);
} }
} }
#ifdef CSR_AUDIO_BASE
const char *notes[85] = {"None", "C1", "C1#", "D1", "D1#", "E1", "F1", "F1#", "G1", "G1#", "A1", "A1#", "B1", "C2", "C2#", "D2", "D2#", "E2", "F2", "F2#", "G2", "G2#", "A2", "A2#", "B2", "C3", "C3#", "D3", "D3#", "E3", "F3", "F3#", "G3", "G3#", "A3", "A3#", "B3", "C4", "C4#", "D4", "D4#", "E4", "F4", "F4#", "G4", "G4#", "A4", "A4#", "B4", "C5", "C5#", "D5", "D5#", "E5", "F5", "F5#", "G5", "G5#", "A5", "A5#", "B5", "C6", "C6#", "D6", "D6#", "E6", "F6", "F6#", "G6", "G6#", "A6", "A6#", "B6", "C7", "C7#", "D7", "D7#", "E7", "F7", "F7#", "G7", "G7#", "A7", "A7#", "B7"};
const int freqs[85] = {0, 33, 35, 37, 39, 41, 44, 46, 49, 52, 55, 58, 62, 65, 69, 73, 78, 82, 87, 93, 98, 104, 110, 117, 123, 131, 139, 147, 156, 165, 175, 185, 196, 208, 220, 233, 247, 262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494, 523, 554, 587, 622, 659, 698, 740, 784, 831, 880, 932, 988, 1047, 1109, 1175, 1245, 1319, 1397, 1480, 1568, 1661, 1760, 1865, 1976, 2093, 2217, 2349, 2489, 2637, 2794, 2960, 3136, 3322, 3520, 3729, 3951};
static void can_listen_cmd() {
wave(WAVE_SINE);
int old_note = 0;
while (true) {
can_frame frame = can_read();
switch (frame.data[0]) {
case 'P': {
int note = (frame.data[1] - 1) * 12 + frame.data[2];
if (note != old_note) {
audio_targ0_write(freqs[note]);
printf("Playing note %s\n", notes[note]);
old_note = note;
}
break;
}
case 'R': {
// TODO: Add polyphony
if (old_note != 0) {
printf("Stopping notes\n");
old_note = 0;
audio_targ0_write(0);
}
break;
}
default: {
// printf("Unknown command, data[0]: 0x%2X", frame.data[0]);
break;
}
}
if (readchar_nonblock()) {
getchar();
return;
}
}
}
#endif
#endif #endif
void donut(void); void donut(void);
@ -354,6 +397,10 @@ static void console_service(void) {
can_read_cmd(&str); can_read_cmd(&str);
else if (strcmp(token, "can_watch") == 0) else if (strcmp(token, "can_watch") == 0)
can_watch_cmd(); can_watch_cmd();
#ifdef CSR_AUDIO_BASE
else if (strcmp(token, "can_listen") == 0)
can_listen_cmd();
#endif
#endif #endif
prompt(); prompt();
} }