6 Commits

Author SHA1 Message Date
9a58eedcc4 melodies 2024-04-10 14:10:49 +02:00
2fb12f8af0 melodies 2024-04-10 14:10:42 +02:00
fef3f69f63 fixed 2024-04-10 14:00:12 +02:00
5b9194caae fix 2024-04-10 13:43:28 +02:00
2f8e2937c1 tusch and sequencer stop fix 2024-04-10 12:58:30 +02:00
3769b3eb05 second chip works, stop mark introduces 2024-04-09 18:37:53 +02:00
11 changed files with 193 additions and 203 deletions

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@ -7,11 +7,11 @@ MCU=msp430g2553
CFLAGS=-Wall -mmcu=$(MCU) -std=gnu99 -I $(TOOLCHAIN_PREFIX)/include -O1 -g0
# for debugging
CFLAGS+= -g3 -ggdb -gdwarf-2
#CFLAGS+= -g3 -ggdb -gdwarf-2
LDFLAGS=-mmcu=$(MCU) -L $(TOOLCHAIN_PREFIX)/include
$(ARTIFACT).elf: main.o scheduler.o spi.o sequencer.o melody.o ay_3_8913.o
$(ARTIFACT).elf: main.o scheduler.o spi.o sequencer.o melody_tetris.o melody_tusch1.o ay_3_8913.o
$(CC) -o $@ $(LDFLAGS) $^
$(OBJDUMP) -D $(ARTIFACT).elf > $(ARTIFACT).txt

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@ -56,7 +56,7 @@ const uint16_t frequencyCodes[8][12] = {
#define R15 015
#define ENVELOPE_SHAPE_REG R15
uint8_t psgShadowRegisters[14];
uint8_t psgShadowRegisters[2][14];
inline static void BUS_OP_NACT() {
BUS_CTRL_REG &= ~(BDIR | BC1);
@ -94,16 +94,20 @@ asm volatile (
}
#endif
static uint8_t psgReadShadow(uint8_t address) {
return psgShadowRegisters[address];
static uint8_t psgReadShadow(uint8_t chip, uint8_t address) {
return psgShadowRegisters[chip][address];
}
static void psgWrite(uint8_t address, uint8_t data) {
psgShadowRegisters[address] = data;
static void psgWrite(uint8_t chip, uint8_t address, uint8_t data) {
psgShadowRegisters[chip][address] = data;
// according to "State Timing" (p. 15) of datasheet
BUS_OP_CS1_ENABLE();
if (chip == 0) {
BUS_OP_CS0_ENABLE();
} else {
BUS_OP_CS1_ENABLE();
}
// put bus into inactive state
BUS_OP_NACT();
@ -126,26 +130,30 @@ static void psgWrite(uint8_t address, uint8_t data) {
// set inactive again
BUS_OP_NACT();
BUS_OP_CS1_DISABLE();
}
static void psgWriteFrequency(uint8_t channel, uint16_t frequencyCode) {
psgWrite(CHANNEL_A_TONE_PERIOD_FINE_REG + (channel * 2), (frequencyCode & 0x00ff));
psgWrite(CHANNEL_A_TONE_PERIOD_COARSE_REG + (channel * 2), ((frequencyCode >> 8) & 0x000f));
}
void psgPlayTone(uint8_t channel, uint8_t volume, t_octave octave, t_note note) {
if (note == e_Pause) {
psgWrite(_ENABLE_REG, psgReadShadow(_ENABLE_REG) | (1 << channel));
if (chip == 0) {
BUS_OP_CS0_DISABLE();
} else {
psgWrite(_ENABLE_REG, psgReadShadow(_ENABLE_REG) & ~(1 << channel));
psgAmplitude(channel, volume);
psgWriteFrequency(channel, frequencyCodes[octave][note]);
BUS_OP_CS1_DISABLE();
}
}
void psgAmplitude(uint8_t channel, uint8_t volume) {
psgWrite(CHANNEL_A_AMPLITUDE_REG + channel, volume);
static void psgWriteFrequency(uint8_t chip, uint8_t channel, uint16_t frequencyCode) {
psgWrite(chip, CHANNEL_A_TONE_PERIOD_FINE_REG + (channel * 2), (frequencyCode & 0x00ff));
psgWrite(chip, CHANNEL_A_TONE_PERIOD_COARSE_REG + (channel * 2), ((frequencyCode >> 8) & 0x000f));
}
void psgPlayTone(uint8_t chip, uint8_t channel, uint8_t volume, t_octave octave, t_note note) {
if (note == e_Pause) {
psgWrite(chip, _ENABLE_REG, psgReadShadow(chip, _ENABLE_REG) | (1 << channel));
} else {
psgWrite(chip, _ENABLE_REG, psgReadShadow(chip, _ENABLE_REG) & ~(1 << channel));
psgAmplitude(chip, channel, volume);
psgWriteFrequency(chip, channel, frequencyCodes[octave][note]);
}
}
void psgAmplitude(uint8_t chip, uint8_t channel, uint8_t volume) {
psgWrite(chip, CHANNEL_A_AMPLITUDE_REG + channel, volume);
}
void psgInit() {
@ -154,18 +162,6 @@ void psgInit() {
P2SEL = 0;
P2SEL2 = 0;
// sound chip reset
// BIT2: /RST
// P1DIR |= BIT2;
#if 0
// put sound chip into reset state
P1OUT &= ~BIT2;
delay();
delay();
delay();
#endif
// bus control lines
// BIT3: BC1
// BIT1: BDIR
@ -176,15 +172,8 @@ void psgInit() {
// put bus into inactive state
BUS_CTRL_REG &= ~(BDIR | BC1);
#if 0
// release sound chip from reset state
P1OUT |= BIT2;
delay();
delay();
delay();
#endif
// disable everything
psgWrite(_ENABLE_REG, 0xff);
psgWrite(0, _ENABLE_REG, 0xff);
psgWrite(1, _ENABLE_REG, 0xff);
}

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@ -6,7 +6,7 @@
#include "psg.h"
#include "scheduler.h"
#include "sequencer.h"
#include "melody.h"
#include "melody_tetris.h"
int main() {
WDTCTL = WDTPW | WDTHOLD;
@ -28,7 +28,7 @@ int main() {
__enable_interrupt();
melodyInit();
playMelodyTetris();
while (1) {

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@ -1,8 +0,0 @@
#ifndef _MELODY_H_
#define _MELODY_H_
void melodyInit();
#endif // _MELODY_H_

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@ -1,119 +1,9 @@
#include <stdbool.h>
#include <stddef.h>
#include "psg.h"
#include "sequencer.h"
#include "scheduler.h"
/*
* most simple Tetris from https://de.wikipedia.org/wiki/Korobeiniki
const t_tone notes[] = {
{ .octave = e_O_3, .note = e_G, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_D, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_4, .legato = false, .staccato = false },
// Triller
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_32, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_32, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_32, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_32, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_D, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_C, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_G, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_D, .length = e_L_1_4, .legato = true , .staccato = false },
{ .octave = e_O_3, .note = e_D, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_G, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_4, .legato = false, .staccato = true },
{ .octave = e_O_3, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = true },
{ .octave = e_O_3, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_8, .legato = true , .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_As, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_B, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_As, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_G, .length = e_L_1_4, .legato = true , .staccato = false },
{ .octave = e_O_3, .note = e_G, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_G, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_D, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_D, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_F, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_G, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_3, .note = e_Es, .length = e_L_1_4, .legato = false, .staccato = true },
{ .octave = e_O_3, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = true },
{ .octave = e_O_3, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_EndMark, .legato = false, .staccato = false },
};
*/
const t_tone tonleiter[] = {
{ .octave = e_O_6, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_6, .note = e_D, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_6, .note = e_E, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_6, .note = e_F, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_6, .note = e_G, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_6, .note = e_A, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_6, .note = e_H, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_EndMark, .legato = false, .staccato = false },
};
const t_tone tonleiter2[] = {
{ .octave = e_O_4, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_D, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_E, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_F, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_G, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_A, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_H, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_EndMark, .legato = false, .staccato = false },
};
const t_tone tonleiter3[] = {
{ .octave = e_O_5, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_D, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_E, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_F, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_G, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_A, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_H, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_EndMark, .legato = false, .staccato = false },
};
/*
* three voices theme from https://www.gamemusicthemes.com/sheetmusic/gameboy/tetris/themea/Tetris_-_Theme_A_by_Gori_Fater.pdf
@ -1033,18 +923,12 @@ const t_tone voice3[] = {
};
t_melodies tetrisTheme = {
.melodies = { { .amplitude = 3, .tones = voice1 }, { .amplitude = 3, .tones = voice2 }, { .amplitude = 3, .tones = voice3 } },
.melodies = { { .chip = 0, .amplitude = 3, .tones = voice1 }, { .chip = 0, .amplitude = 3, .tones = voice2 }, { .chip = 0, .amplitude = 3, .tones = voice3 } },
.numOfMelodies = 3,
.pace = 160
};
t_melodies tonleiterTheme = {
.melodies = { { .amplitude = 3, .tones = tonleiter }, { .amplitude = 3, .tones = tonleiter2 }, { .amplitude = 3, .tones = tonleiter3 } },
.numOfMelodies = 3,
.pace = 160
};
void melodyInit() {
void playMelodyTetris() {
sequencerPlayMelodies(&tetrisTheme);
}

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@ -0,0 +1,8 @@
#ifndef _MELODY_TETRIS_H_
#define _MELODY_TETRIS_H_
void playMelodyTetris();
#endif // _MELODY_TETRIS_H_

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@ -0,0 +1,84 @@
#include <stdbool.h>
#include <stddef.h>
#include "psg.h"
#include "sequencer.h"
#include "scheduler.h"
const t_tone tusch1voice1[] = {
{ .octave = e_O_5, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = true },
{ .octave = e_O_5, .note = e_F, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = true },
{ .octave = e_O_5, .note = e_F, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_C, .length = e_L_1_4, .legato = false, .staccato = true },
{ .octave = e_O_5, .note = e_F, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_StopMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_EndMark, .legato = false, .staccato = false },
};
const t_tone tusch1voice2[] = {
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_C, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_C, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_5, .note = e_C, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_HoldMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_EndMark, .legato = false, .staccato = false },
};
const t_tone tusch1voice3[] = {
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_A, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_A, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_8, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Pause, .length = e_L_1_4, .legato = false, .staccato = false },
{ .octave = e_O_4, .note = e_A, .length = e_L_1_2, .legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_SyncMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_HoldMark,.legato = false, .staccato = false },
{ .octave = e_O_Null, .note = e_Null, .length = e_L_EndMark, .legato = false, .staccato = false },
};
t_melodies tusch1 = {
.melodies = { { .chip = 1, .amplitude = 6, .tones = tusch1voice1 }, { .chip = 1, .amplitude = 6, .tones = tusch1voice2 }, { .chip = 1, .amplitude = 6, .tones = tusch1voice3 } },
.numOfMelodies = 3,
.pace = 200
};
void playTusch1() {
sequencerPlayMelodies(&tusch1);
}

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@ -0,0 +1,8 @@
#ifndef _MELODY_TUSCH1_H_
#define _MELODY_TUSCH1_H_
void playTusch1();
#endif // _MELODY_TUSCH1_H_

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@ -39,8 +39,8 @@ typedef enum {
void psgInit();
void psgPlayTone(uint8_t channel, uint8_t volume, t_octave octave, t_note note);
void psgAmplitude(uint8_t channel, uint8_t volume);
void psgPlayTone(uint8_t chip, uint8_t channel, uint8_t volume, t_octave octave, t_note note);
void psgAmplitude(uint8_t chip, uint8_t channel, uint8_t volume);
#endif // _PSG_H_

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@ -10,24 +10,30 @@
void sequencerInit() {
}
void sequencerExec(void *handle) {
static uint16_t lengths[e_L_LengthEnd];
t_melodies *melodies = (t_melodies*) handle;
if (melodies->firstRun) {
melodies->firstRun = false;
lengths[e_L_1_4] = 60000 / melodies->pace; // duration of a 1/4 tone in ms
lengths[e_L_1_2] = lengths[e_L_1_4] << 1;
lengths[e_L_1] = lengths[e_L_1_4] << 2;
lengths[e_L_1_8] = lengths[e_L_1_4] >> 1;
lengths[e_L_1_16] = lengths[e_L_1_4] >> 2;
lengths[e_L_1_32] = lengths[e_L_1_4] >> 4;
for (uint8_t i = 0; i < e_L_LengthEnd; i++) {
lengths[i] /= SEQUENCER_PERIOD;
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch"
#pragma GCC diagnostic ignored "-Wreturn-type"
static uint16_t calcLength(t_melodies *m, t_noteLength l) {
switch (l) {
case e_L_1:
return m->quarterLength << 2;
case e_L_1_2:
return m->quarterLength << 1;
case e_L_1_4:
return m->quarterLength;
case e_L_1_8:
return m->quarterLength >> 1;
case e_L_1_16:
return m->quarterLength >> 2;
case e_L_1_32:
return m->quarterLength >> 4;
}
}
#pragma GCC diagnostic pop
void sequencerExec(void *handle) {
t_melodies *melodies = (t_melodies*) handle;
for (uint8_t channel = 0; channel < melodies->numOfMelodies; channel++) {
t_melody *melody = &(melodies->melodies[channel]);
@ -43,12 +49,18 @@ void sequencerExec(void *handle) {
}
melodies->sync -= 1;
melody->state = e_Sync;
} else if (melody->tones[melody->idx].length == e_L_HoldMark) {
melody->state = e_Hold;
} else if (melody->tones[melody->idx].length == e_L_StopMark) {
melody->state = e_Terminate;
} else {
if (melody->tones[melody->idx].length == e_L_EndMark) {
melody->idx = 0;
}
psgPlayTone(channel, melody->amplitude, melody->tones[melody->idx].octave, melody->tones[melody->idx].note);
melody->lengthCnt = (melody->tones[melody->idx].staccato) ? (lengths[melody->tones[melody->idx].length] / 2) : lengths[melody->tones[melody->idx].length];
psgPlayTone(melody->chip, channel, melody->amplitude, melody->tones[melody->idx].octave, melody->tones[melody->idx].note);
melody->lengthCnt = (melody->tones[melody->idx].staccato) ?
(calcLength(melodies, melody->tones[melody->idx].length) / 2) :
calcLength(melodies, melody->tones[melody->idx].length);
melody->state = e_HoldTone;
}
break;
@ -64,8 +76,8 @@ void sequencerExec(void *handle) {
}
break;
case e_StaccatoBreak:
psgPlayTone(channel, 0, e_O_Null, e_Pause);
melody->lengthCnt = lengths[melody->tones[melody->idx].length] / 2;
psgPlayTone(melody->chip, channel, 0, e_O_Null, e_Pause);
melody->lengthCnt = calcLength(melodies, melody->tones[melody->idx].length) / 2;
melody->state = e_HoldStaccatoBreak;
break;
case e_HoldStaccatoBreak:
@ -76,11 +88,16 @@ void sequencerExec(void *handle) {
break;
case e_SeparateTone:
if (! (melody->tones[melody->idx].legato)) {
psgPlayTone(channel, 0, e_O_Null, e_Pause);
psgPlayTone(melody->chip, channel, 0, e_O_Null, e_Pause);
}
melody->idx += 1;
melody->state = e_PlayTone;
break;
case e_Hold:
break;
case e_Terminate:
schDel(melodies->taskId);
break;
}
}
}
@ -92,8 +109,10 @@ uint16_t sequencerPlayMelodies(t_melodies *melodies) {
melodies->melodies[i].state = e_Init;
}
melodies->sync = 0;
melodies->firstRun = true;
melodies->quarterLength = 60000 / melodies->pace / SEQUENCER_PERIOD; // duration of a 1/4 tone in ms
return schAdd(sequencerExec, (void*) melodies, 0, SEQUENCER_PERIOD);
melodies->taskId = schAdd(sequencerExec, (void*) melodies, 0, SEQUENCER_PERIOD);
return melodies->taskId;
}

View File

@ -14,6 +14,8 @@ typedef enum {
e_L_1_16 = 4,
e_L_1_32 = 5,
e_L_LengthEnd = 6,
e_L_HoldMark = 252,
e_L_StopMark = 253,
e_L_EndMark = 254,
e_L_SyncMark = 255,
} t_noteLength;
@ -33,11 +35,14 @@ typedef enum {
e_HoldTone,
e_StaccatoBreak,
e_HoldStaccatoBreak,
e_SeparateTone
e_SeparateTone,
e_Hold,
e_Terminate
} t_sequencerState;
typedef struct {
uint16_t idx;
uint8_t chip;
uint16_t lengthCnt;
t_sequencerState state;
uint8_t amplitude;
@ -47,8 +52,9 @@ typedef struct {
#define SEQUENCER_PERIOD 4 // ms
#define NUM_OF_CHANNELS 3
typedef struct {
uint8_t taskId;
uint16_t quarterLength;
uint8_t numOfMelodies;
bool firstRun;
uint8_t pace; // quarter notes per minute
uint8_t sync;
t_melody melodies[NUM_OF_CHANNELS];