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228 lines
6.2 KiB
228 lines
6.2 KiB
//
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// MicroDexed
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//
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// A port of the Dexed sound engine (https://github.com/asb2m10/dexed) for the Teensy-3.5/3.6 with audio shield
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// (c)2018 H. Wirtz <wirtz@parasitstudio.de>
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//
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#include <Audio.h>
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#include <Wire.h>
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#include <SPI.h>
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#include <SD.h>
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#include <MIDI.h>
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#include "dexed.h"
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#define AUDIO_MEM 2
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#define SAMPLE_RATE 44100
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//#define INIT_AUDIO_QUEUE 1
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//#define SHOW_DEXED_TIMING 1
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#define SHOW_XRUN 1
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#define SHOW_CPU_LOAD_MSEC 5000
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#define MAX_NOTES 10
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#define TEST_MIDI 1
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#define TEST_NOTE 40
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#define TEST_VEL 127
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//#define ADD_EFFECT_CHORUS 1
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// Use these with the Teensy Audio Shield
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#define SDCARD_CS_PIN 10
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#define SDCARD_MOSI_PIN 7
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#define SDCARD_SCK_PIN 14
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// Use these with the Teensy 3.5 & 3.6 SD card
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//#define SDCARD_CS_PIN BUILTIN_SDCARD
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//#define SDCARD_MOSI_PIN 11 // not actually used
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//#define SDCARD_SCK_PIN 13 // not actually used
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// GUItool: begin automatically generated code
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AudioPlayQueue queue1; //xy=84,294
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AudioOutputI2S i2s1; //xy=961,276
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#ifdef ADD_EFFECT_CHORUS
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AudioEffectChorus chorus1; //xy=328,295
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AudioConnection patchCord1(queue1, chorus1);
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AudioConnection patchCord2(chorus1, 0, i2s1, 0);
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AudioConnection patchCord3(chorus1, 0, i2s1, 1);
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#else
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AudioConnection patchCord2(queue1, 0, i2s1, 0);
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AudioConnection patchCord3(queue1, 0, i2s1, 1);
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#endif
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AudioControlSGTL5000 sgtl5000_1; //xy=507,403
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// GUItool: end automatically generated code
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MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDI);
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Dexed* dexed = new Dexed(SAMPLE_RATE);
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IntervalTimer sched;
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Sd2Card card;
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SdVolume volume;
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#ifdef ADD_EFFECT_CHORUS
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// Number of samples in each delay line
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#define CHORUS_DELAY_LENGTH (16*AUDIO_BLOCK_SAMPLES)
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// Allocate the delay lines for left and right channels
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short delayline[CHORUS_DELAY_LENGTH];
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#endif
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void setup()
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{
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//while (!Serial) ; // wait for Arduino Serial Monitor
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Serial.begin(115200);
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Serial.println(F("MicroDexed based on https://github.com/asb2m10/dexed"));
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Serial.println(F("(c)2018 H. Wirtz"));
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Serial.println(F("setup start"));
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SPI.setMOSI(SDCARD_MOSI_PIN);
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SPI.setSCK(SDCARD_SCK_PIN);
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if (card.init(SPI_FULL_SPEED, SDCARD_CS_PIN)) {
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Serial.println(F("SD card found."));
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}
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else
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{
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Serial.println(F("No SD card found."));
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}
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switch (card.type())
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{
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case SD_CARD_TYPE_SD1:
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case SD_CARD_TYPE_SD2:
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Serial.println(F("Card type is SD"));
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break;
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case SD_CARD_TYPE_SDHC:
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Serial.println(F("Card type is SDHC"));
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break;
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default:
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Serial.println(F("Card is an unknown type (maybe SDXC?)"));
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}
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if (!volume.init(card)) {
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Serial.println(F("Unable to access the filesystem"));
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}
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MIDI.begin(MIDI_CHANNEL_OMNI);
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// Audio connections require memory to work. For more
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// detailed information, see the MemoryAndCpuUsage example
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AudioMemory(AUDIO_MEM);
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sgtl5000_1.enable();
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sgtl5000_1.volume(0.2);
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// Initialize processor and memory measurements
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#ifdef SHOW_CPU_LOAD_MSEC
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AudioProcessorUsageMaxReset();
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AudioMemoryUsageMaxReset();
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#endif
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#ifdef INIT_AUDIO_QUEUE
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// initial fill audio buffer with empty data
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while (queue1.available())
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{
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int16_t* audio_buffer = queue1.getBuffer();
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if (audio_buffer != NULL)
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{
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memset(audio_buffer, 0, sizeof(int16_t)*AUDIO_BLOCK_SAMPLES);
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queue1.playBuffer();
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}
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}
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#endif
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dexed->activate();
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dexed->setMaxNotes(MAX_NOTES);
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#ifdef ADD_EFFECT_CHORUS
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chorus1.begin(delayline, CHORUS_DELAY_LENGTH, 8);
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#endif
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#ifdef TEST_MIDI
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queue_midi_event(0x90, TEST_NOTE, TEST_VEL); // 1
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queue_midi_event(0x90, TEST_NOTE + 5, TEST_VEL); // 2
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queue_midi_event(0x90, TEST_NOTE + 8, TEST_VEL); // 3
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queue_midi_event(0x90, TEST_NOTE + 12, TEST_VEL); // 4
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queue_midi_event(0x90, TEST_NOTE + 17, TEST_VEL); // 5
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queue_midi_event(0x90, TEST_NOTE + 20, TEST_VEL); // 6
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queue_midi_event(0x90, TEST_NOTE + 24, TEST_VEL); // 7
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queue_midi_event(0x90, TEST_NOTE + 29, TEST_VEL); // 8
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queue_midi_event(0x90, TEST_NOTE + 32, TEST_VEL); // 9
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queue_midi_event(0x90, TEST_NOTE + 37, TEST_VEL); // 10
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queue_midi_event(0x90, TEST_NOTE + 40, TEST_VEL); // 11
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queue_midi_event(0x90, TEST_NOTE + 44, TEST_VEL); // 12
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queue_midi_event(0x90, TEST_NOTE + 49, TEST_VEL); // 13
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queue_midi_event(0x90, TEST_NOTE + 52, TEST_VEL); // 14
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queue_midi_event(0x90, TEST_NOTE + 57, TEST_VEL); // 15
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queue_midi_event(0x90, TEST_NOTE + 60, TEST_VEL); // 16
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#endif
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#ifdef SHOW_CPU_LOAD_MSEC
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sched.begin(cpu_and_mem_usage, SHOW_CPU_LOAD_MSEC * 1000);
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#endif
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Serial.print(F("AUDIO_BLOCK_SAMPLES="));
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Serial.println(AUDIO_BLOCK_SAMPLES);
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Serial.println(F("setup end"));
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cpu_and_mem_usage();
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}
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void loop()
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{
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int16_t* audio_buffer; // pointer to 128 * int16_t
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bool break_for_calculation;
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while (42 == 42) // DON'T PANIC!
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{
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audio_buffer = queue1.getBuffer();
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if (audio_buffer == NULL)
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{
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Serial.println(F("audio_buffer allocation problems!"));
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}
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while (MIDI.read())
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{
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break_for_calculation = dexed->ProcessMidiMessage(MIDI.getType(), MIDI.getData1(), MIDI.getData2());
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if (break_for_calculation == true)
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break;
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}
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if(!queue1.available())
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continue;
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#if defined(SHOW_DEXED_TIMING) || defined(SHOW_XRUN)
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elapsedMicros t1;
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#endif
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dexed->GetSamples(AUDIO_BLOCK_SAMPLES, audio_buffer);
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#ifdef SHOW_XRUN
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uint32_t t2 = t1;
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if (t2 > 2900)
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Serial.println(F("xrun"));
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#endif
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#ifdef SHOW_DEXED_TIMING
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Serial.println(t1, DEC);
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#endif
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queue1.playBuffer();
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}
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}
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bool queue_midi_event(uint8_t type, uint8_t data1, uint8_t data2)
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{
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return (dexed->ProcessMidiMessage(type, data1, data2));
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}
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#ifdef SHOW_CPU_LOAD_MSEC
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void cpu_and_mem_usage(void)
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{
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Serial.print(F("CPU:"));
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Serial.print(AudioProcessorUsage(), DEC);
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Serial.print(F(" CPU MAX:"));
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Serial.print(AudioProcessorUsageMax(), DEC);
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Serial.print(F(" MEM:"));
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Serial.print(AudioMemoryUsage(), DEC);
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Serial.print(F(" MEM MAX:"));
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Serial.print(AudioMemoryUsageMax(), DEC);
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Serial.println();
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AudioProcessorUsageMaxReset();
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AudioMemoryUsageMaxReset();
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}
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#endif
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void spaces(int num) {
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for (int i = 0; i < num; i++) {
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Serial.print(" ");
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}
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}
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