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Tonleiter is running

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This commit is contained in:
Wolfgang Hottgenroth
2024-03-26 16:47:42 +01:00
parent 152f171c66
commit 5e2f120432
7 changed files with 88 additions and 14 deletions
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17
sound-driver/psg.c
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@ -4,7 +4,6 @@
#include "psg.h"
#include "scheduler.h"
#include "notes.h"
@ -62,7 +61,7 @@ asm volatile (
);
}
static void writePSG(uint8_t address, uint8_t data) {
void psgWrite(uint8_t address, uint8_t data) {
// according to "State Timing" (p. 15) of datasheet
// put bus into inactive state
@ -87,13 +86,13 @@ static void writePSG(uint8_t address, uint8_t data) {
BUS_OP_NACT();
}
static void writeFrequency(uint8_t channel, uint16_t frequencyCode) {
writePSG(R0 + (channel * 2), (frequencyCode & 0x00ff));
writePSG(R1 + (channel * 2), ((frequencyCode >> 8) & 0x000f));
void psgWriteFrequency(uint8_t channel, uint16_t frequencyCode) {
psgWrite(R0 + (channel * 2), (frequencyCode & 0x00ff));
psgWrite(R1 + (channel * 2), ((frequencyCode >> 8) & 0x000f));
}
void psgPlayTone(uint8_t channel, t_octave octave, t_note note) {
writeFrequency(channel, frequencyCodes[octave][note]);
psgWriteFrequency(channel, frequencyCodes[octave][note]);
}
void playSomething(void *handle) {
@ -101,8 +100,8 @@ void playSomething(void *handle) {
switch (state) {
case 0:
writePSG(R7, 0b11111110);
writePSG(R10, 03);
psgWrite(R7, 0b11111110);
psgWrite(R10, 03);
state = 1;
// no break;
@ -148,7 +147,7 @@ void psgInit() {
delay();
delay();
schAdd(playSomething, NULL, 0, 500);
// schAdd(playSomething, NULL, 0, 500);
}