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note definitions

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This commit is contained in:
Wolfgang Hottgenroth
2024-03-25 23:13:33 +01:00
parent 5a491140c7
commit d8e34ec209
2 changed files with 161 additions and 12 deletions
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59
sound-driver/main.c
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@ -68,33 +68,21 @@ static void writePSG(uint8_t address, uint8_t data) {
// put bus into inactive state
BUS_OP_NACT();
delay();
// put address on bus
ADDR_DATA_REG = address;
delay();
// address latch mode
BUS_OP_INTAK();
delay();
// latch address
BUS_OP_NACT();
delay();
// put data on bus
ADDR_DATA_REG = data;
delay();
// set write to psg
BUS_OP_DWS();
delay();
// set inactive again
BUS_OP_NACT();
@ -102,6 +90,13 @@ static void writePSG(uint8_t address, uint8_t data) {
//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);
}
int main() {
WDTCTL = WDTPW | WDTHOLD;
@ -161,11 +156,51 @@ int main() {
__enable_interrupt();
BUS_OP_ENABLE_CS();
/*
// single tone
writePSG(R0, 0376);
writePSG(R1, 0);
writePSG(R7, 076);
writePSG(R10, 03);
*/
/*
// gun shot
writePSG(R6, 017);
writePSG(R7, 007);
writePSG(R10, 020);
writePSG(R11, 020);
writePSG(R12, 020);
writePSG(R14, 020);
writePSG(R15, 0);
*/
/*
// explosion
writePSG(R6, 0);
writePSG(R7, 007);
writePSG(R10, 020);
writePSG(R11, 020);
writePSG(R12, 020);
writePSG(R14, 070);
writePSG(R15, 0);
*/
/*
// Akkord
writeFrequency(0, 01527);
writeFrequency(1, 01247);
writeFrequency(2, 01073);
writePSG(R7, 0b11111000);
writePSG(R10, 03);
writePSG(R11, 03);
writePSG(R12, 03);
*/
BUS_OP_DISABLE_CS();