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scheduler added, tuned for 1ms

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This commit is contained in:
Wolfgang Hottgenroth
2024-03-26 10:44:23 +01:00
parent d8e34ec209
commit 48c83f0b2d
5 changed files with 133 additions and 29 deletions
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41
sound-driver/main.c
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@ -2,12 +2,14 @@
#include <stdint.h>
#include <stdlib.h>
#include "notes.h"
#include "scheduler.h"
#define ADDR_DATA_REG P2OUT
#define BUS_CTRL_REG P1OUT
#define BC1 BIT0
#define BC1 BIT3
#define BDIR BIT1
#define _CS BIT3
#define R0 0
#define R1 1
@ -24,12 +26,6 @@
#define R14 014
#define R15 015
inline static void BUS_OP_ENABLE_CS() {
BUS_CTRL_REG &= ~_CS;
}
inline static void BUS_OP_DISABLE_CS() {
BUS_CTRL_REG |= _CS;
}
inline static void BUS_OP_NACT() {
BUS_CTRL_REG &= ~(BDIR | BC1);
}
@ -62,9 +58,6 @@ asm volatile (
static void writePSG(uint8_t address, uint8_t data) {
// according to "State Timing" (p. 15) of datasheet
// select chip
//BUS_OP_ENABLE_CS();
// put bus into inactive state
BUS_OP_NACT();
@ -85,16 +78,11 @@ static void writePSG(uint8_t address, uint8_t data) {
// set inactive again
BUS_OP_NACT();
// deselect chip
//BUS_OP_DISABLE_CS();
}
static void writeFrequency(uint8_t channel, uint16_t frequencyCode) {
uint8_t fine = frequencyCode & 0x00ff;
uint8_t coarse = (frequencyCode >> 8) & 0x000f;
writePSG(R0 + (channel * 2), fine);
writePSG(R1 + (channel * 2), coarse);
writePSG(R0 + (channel * 2), (frequencyCode & 0x00ff));
writePSG(R1 + (channel * 2), ((frequencyCode >> 8) & 0x000f));
}
int main() {
@ -137,14 +125,12 @@ int main() {
delay();
// bus control lines
// BIT0: BC1
// BIT3: BC1
// BIT1: BDIR
// BIT3: /CS
P1DIR |= BIT0 | BIT1 | BIT3;
P1DIR |= BIT1 | BIT3;
// put bus into inactive state
BUS_CTRL_REG &= ~(BDIR | BC1);
BUS_CTRL_REG |= _CS;
// release sound chip from reset state
P1OUT |= BIT2;
@ -153,11 +139,12 @@ int main() {
delay();
schInit();
__enable_interrupt();
BUS_OP_ENABLE_CS();
/*
// single tone
@ -191,9 +178,9 @@ int main() {
/*
// Akkord
writeFrequency(0, 01527);
writeFrequency(1, 01247);
writeFrequency(2, 01073);
writeFrequency(0, C5);
writeFrequency(1, E5);
writeFrequency(2, G5);
writePSG(R7, 0b11111000);
writePSG(R10, 03);
writePSG(R11, 03);
@ -201,9 +188,9 @@ int main() {
*/
BUS_OP_DISABLE_CS();
while (1) {
schExec();
}
}