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| #include <SPI.h> | |
| #include "registers.h" | |
| #define SEMI 1.059463 | |
| #define LED 20 | |
| #define BITS(val, ofst, wdt) (((val) & ((1<<wdt)-1)) << ofst) | |
| void writeReg(byte addr, byte data) { | |
| SPI.transfer(addr); | |
| delay(1); | |
| SPI.transfer(data); | |
| delay(1); | |
| } | |
| void ch1Sweep(int sweep_time, int sweep_length, int dir) { | |
| byte data = BITS(sweep_time, 4, 3) | BITS(sweep_length, 0, 3) | BITS(dir, 3, 1); | |
| writeReg(rAUD1SWEEP, data); | |
| } | |
| void ch1Length(int audio_length, int dutycycle) { | |
| byte data = BITS(dutycycle, 6, 2) | BITS(audio_length, 0, 5); | |
| writeReg(rAUD1LEN, data); | |
| } | |
| void ch1Envelope(int initial, int env_num, int dir) { | |
| byte data = BITS(initial, 4, 4) | BITS(env_num, 0, 3) | BITS(dir, 3, 1); | |
| writeReg(rAUD1ENV, data); | |
| } | |
| void ch1Play(float freq, int counter) { | |
| int period = 2048*(freq-64)/freq; | |
| writeReg(rAUD1LOW, period & 0xFF); | |
| byte data = 0x80 | BITS(period >> 8, 0, 3) | BITS(counter, 6, 1); | |
| writeReg(rAUD1HIGH, data); | |
| } | |
| void ch2Length(int audio_length, int dutycycle) { | |
| byte data = BITS(dutycycle, 6, 2) | BITS(audio_length, 0, 5); | |
| writeReg(rAUD2LEN, data); | |
| } | |
| void ch2Envelope(int initial, int env_num, int dir) { | |
| byte data = BITS(initial, 4, 4) | BITS(env_num, 0, 3) | BITS(dir, 3, 1); | |
| writeReg(rAUD2ENV, data); | |
| } | |
| void ch2Play(float freq, int counter, int re) { | |
| int period = 2048*(freq-64)/freq; | |
| writeReg(rAUD2LOW, period & 0xFF); | |
| byte data = BITS(re, 7, 1) | BITS(period >> 8, 0, 3) | BITS(counter, 6, 1); | |
| writeReg(rAUD2HIGH, data); | |
| } | |
| void setup() { | |
| Serial.begin(115200); | |
| Serial.print("hello world\n"); | |
| SPI.begin(); | |
| SPI.beginTransaction(SPISettings(8000, MSBFIRST, SPI_MODE3)); | |
| pinMode(LED, OUTPUT); | |
| digitalWrite(LED, HIGH); | |
| } | |
| int oldValue = 0; | |
| void loop() { | |
| //ch1Sweep(0, 7, 0); | |
| //ch1Length(63, 2); | |
| //ch1Envelope(15, 7, 0); | |
| //ch1Play(f, 0); | |
| //delay(500); | |
| int sensorValue = analogRead(A9); | |
| Serial.print(sensorValue); | |
| Serial.print(" "); | |
| Serial.println(oldValue); | |
| bool lowValue = sensorValue < 1; | |
| bool oldLowValue = oldValue < 1; | |
| int outputValue = map(sensorValue, 0, 1023, 440, 1760); | |
| int oldOutputValue = map(oldValue, 0, 1023, 440, 1760); | |
| if(!lowValue && oldLowValue) { // rising edge | |
| ch2Length(63, 2); | |
| ch2Envelope(15, 0, 0); | |
| ch2Play(outputValue, 0, 1); | |
| } else if (lowValue && !oldLowValue) { // falling edge | |
| ch2Envelope(15, 3, 0); | |
| ch2Play(oldOutputValue, 0, 1); | |
| } else if(!lowValue) { // high | |
| //ch2Length(63, 2); | |
| //ch2Envelope(15, 0, 0); | |
| ch2Play(outputValue, 0, 0); | |
| } | |
| oldValue = sensorValue; | |
| delay(10); | |
| } |
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| // -- | |
| // -- AUDVOL/NR50 (0x24) | |
| // -- Channel control / ON-OFF / Volume (R/W) | |
| // -- | |
| // -- Bit 7 - Vin->SO2 ON/OFF (Vin??) | |
| // -- Bit 6-4 - SO2 output level (volume) (# 0-7) | |
| // -- Bit 3 - Vin->SO1 ON/OFF (Vin??) | |
| // -- Bit 2-0 - SO1 output level (volume) (# 0-7) | |
| // -- | |
| #define rNR50 0x24 | |
| #define rAUDVOL rNR50 | |
| // -- | |
| // -- AUDTERM/NR51 (0x25) | |
| // -- Selection of Sound output terminal (R/W) | |
| // -- | |
| // -- Bit 7 - Output sound 4 to SO2 terminal | |
| // -- Bit 6 - Output sound 3 to SO2 terminal | |
| // -- Bit 5 - Output sound 2 to SO2 terminal | |
| // -- Bit 4 - Output sound 1 to SO2 terminal | |
| // -- Bit 3 - Output sound 4 to SO1 terminal | |
| // -- Bit 2 - Output sound 3 to SO1 terminal | |
| // -- Bit 1 - Output sound 2 to SO1 terminal | |
| // -- Bit 0 - Output sound 0 to SO1 terminal | |
| // -- | |
| #define rNR51 0x25 | |
| #define rAUDTERM rNR51 | |
| // -- | |
| // -- AUDENA/NR52 (0x26) | |
| // -- Sound on/off (R/W) | |
| // -- | |
| // -- Bit 7 - All sound on/off (sets all audio regs to 0!) | |
| // -- Bit 3 - Sound 4 ON flag (doesn't work!) | |
| // -- Bit 2 - Sound 3 ON flag (doesn't work!) | |
| // -- Bit 1 - Sound 2 ON flag (doesn't work!) | |
| // -- Bit 0 - Sound 1 ON flag (doesn't work!) | |
| // -- | |
| #define rNR52 0x26 | |
| #define rAUDENA rNR52 | |
| //*************************************************************************** | |
| //* | |
| //* SoundChannel #1 registers | |
| //* | |
| //*************************************************************************** | |
| // -- | |
| // -- AUD1SWEEP/NR10 (0x10) | |
| // -- Sweep register (R/W) | |
| // -- | |
| // -- Bit 6-4 - Sweep Time | |
| // -- Bit 3 - Sweep Increase/Decrease | |
| // -- 0: Addition (frequency increases???) | |
| // -- 1: Subtraction (frequency increases???) | |
| // -- Bit 2-0 - Number of sweep shift (# 0-7) | |
| // -- Sweep Time: (n*7.8ms) | |
| // -- | |
| #define rNR10 0x10 | |
| #define rAUD1SWEEP rNR10 | |
| // -- | |
| // -- AUD1LEN/NR11 (0x11) | |
| // -- Sound length/Wave pattern duty (R/W) | |
| // -- | |
| // -- Bit 7-6 - Wave Pattern Duty (00:12.5% 01:25% 10:50% 11:75%) | |
| // -- Bit 5-0 - Sound length data (# 0-63) | |
| // -- | |
| #define rNR11 0x11 | |
| #define rAUD1LEN rNR11 | |
| // -- | |
| // -- AUD1ENV/NR12 (0x12) | |
| // -- Envelope (R/W) | |
| // -- | |
| // -- Bit 7-4 - Initial value of envelope | |
| // -- Bit 3 - Envelope UP/DOWN | |
| // -- 0: Decrease | |
| // -- 1: Range of increase | |
| // -- Bit 2-0 - Number of envelope sweep (# 0-7) | |
| // -- | |
| #define rNR12 0x12 | |
| #define rAUD1ENV rNR12 | |
| // -- | |
| // -- AUD1LOW/NR13 (0x13) | |
| // -- Frequency lo (W) | |
| // -- | |
| #define rNR13 0x13 | |
| #define rAUD1LOW rNR13 | |
| // -- | |
| // -- AUD1HIGH/NR14 (0x14) | |
| // -- Frequency hi (W) | |
| // -- | |
| // -- Bit 7 - Initial (when set, sound restarts) | |
| // -- Bit 6 - Counter/consecutive selection | |
| // -- Bit 2-0 - Frequency's higher 3 bits | |
| // -- | |
| #define rNR14 0x14 | |
| #define rAUD1HIGH rNR14 | |
| //*************************************************************************** | |
| //* | |
| //* SoundChannel #2 registers | |
| //* | |
| //*************************************************************************** | |
| // -- | |
| // -- AUD2LEN/NR21 (0x16) | |
| // -- Sound Length; Wave Pattern Duty (R/W) | |
| // -- | |
| // -- see AUD1LEN for info | |
| // -- | |
| #define rNR21 0x16 | |
| #define rAUD2LEN rNR21 | |
| // -- | |
| // -- AUD2ENV/NR22 (0x17) | |
| // -- Envelope (R/W) | |
| // -- | |
| // -- see AUD1ENV for info | |
| // -- | |
| #define rNR22 0x17 | |
| #define rAUD2ENV rNR22 | |
| // -- | |
| // -- AUD2LOW/NR23 (0x18) | |
| // -- Frequency lo (W) | |
| // -- | |
| #define rNR23 0x18 | |
| #define rAUD2LOW rNR23 | |
| // -- | |
| // -- AUD2HIGH/NR24 (0x19) | |
| // -- Frequency hi (W) | |
| // -- | |
| // -- see AUD1HIGH for info | |
| // -- | |
| #define rNR24 0x19 | |
| #define rAUD2HIGH rNR24 | |
| //*************************************************************************** | |
| //* | |
| //* SoundChannel #3 registers | |
| //* | |
| //*************************************************************************** | |
| // -- | |
| // -- AUD3ENA/NR30 (0x1A) | |
| // -- Sound on/off (R/W) | |
| // -- | |
| // -- Bit 7 - Sound ON/OFF (1EQUON,0EQUOFF) | |
| // -- | |
| #define rNR30 0x1A | |
| #define rAUD3ENA rNR30 | |
| // -- | |
| // -- AUD3LEN/NR31 (0x1B) | |
| // -- Sound length (R/W) | |
| // -- | |
| // -- Bit 7-0 - Sound length | |
| // -- | |
| #define rNR31 0x1B | |
| #define rAUD3LEN rNR31 | |
| // -- | |
| // -- AUD3LEVEL/NR32 (0x1C) | |
| // -- Select output level | |
| // -- | |
| // -- Bit 6-5 - Select output level | |
| // -- 00: 0/1 (mute) | |
| // -- 01: 1/1 | |
| // -- 10: 1/2 | |
| // -- 11: 1/4 | |
| // -- | |
| #define rNR32 0x1C | |
| #define rAUD3LEVEL rNR32 | |
| // -- | |
| // -- AUD3LOW/NR33 (0x1D) | |
| // -- Frequency lo (W) | |
| // -- | |
| // -- see AUD1LOW for info | |
| // -- | |
| #define rNR33 0x1D | |
| #define rAUD3LOW rNR33 | |
| // -- | |
| // -- AUD3HIGH/NR34 (0x1E) | |
| // -- Frequency hi (W) | |
| // -- | |
| // -- see AUD1HIGH for info | |
| // -- | |
| #define rNR34 0x1E | |
| #define rAUD3HIGH rNR34 | |
| // -- | |
| // -- AUD4LEN/NR41 (0x20) | |
| // -- Sound length (R/W) | |
| // -- | |
| // -- Bit 5-0 - Sound length data (# 0-63) | |
| // -- | |
| #define rNR41 0x20 | |
| #define rAUD4LEN rNR41 | |
| // -- | |
| // -- AUD4ENV/NR42 (0x21) | |
| // -- Envelope (R/W) | |
| // -- | |
| // -- see AUD1ENV for info | |
| // -- | |
| #define rNR42 0x21 | |
| #define rAUD4ENV rNR42 | |
| // -- | |
| // -- AUD4POLY/NR42 (0x22) | |
| // -- Polynomial counter (R/W) | |
| // -- | |
| // -- Bit 7-4 - Selection of the shift clock frequency of the (scf) | |
| // -- polynomial counter (0000-1101) | |
| // -- freqEQUdrf*1/2^scf (not sure) | |
| // -- Bit 3 - Selection of the polynomial counter's step | |
| // -- 0: 15 steps | |
| // -- 1: 7 steps | |
| // -- Bit 2-0 - Selection of the dividing ratio of frequencies (drf) | |
| // -- 000: f/4 001: f/8 010: f/16 011: f/24 | |
| // -- 100: f/32 101: f/40 110: f/48 111: f/56 (fEQU4.194304 Mhz) | |
| // -- | |
| #define rNR42_2 0x22 | |
| #define rAUD4POLY rNR42_2 | |
| // -- | |
| // -- AUD4GO/NR43 (0x23) | |
| // -- (has wrong name and value (ff30) in Dr.Pan's doc!) | |
| // -- | |
| // -- Bit 7 - Inital | |
| // -- Bit 6 - Counter/consecutive selection | |
| // -- | |
| #define rNR43 0x23 | |
| #define rAUD4GO rNR43 // silly name! |
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