PianoProject/ESP32/serial.cpp

#include "serial.h"
#include "note.h"
#include "sustain.h"
#include "settings.h"
#include "main.h"

void sendMidiToProMicro(byte note, byte velocity);

//serial is always handled in bytes, not uint8_t because serial is dumb
extern const byte NOTE_HEADER    = 201;
extern const byte SUSTAIN_HEADER = 202;
extern const byte SETTING_HEADER = 203;
extern const byte RESET_HEADER   = 204;
extern const byte VOLUME_HEADER  = 205;
extern const byte END_HEADER     = 206;

void checkForSerial()
{
	while(Serial.available() > 2)
	{
		uint8_t header = Serial.read();
		if(header >= NOTE_HEADER && header <= VOLUME_HEADER) //make sure the first byte is a header
		{
			uint8_t byte1 = Serial.read(); //only declare these if the first byte is a header
			uint8_t byte2 = Serial.read(); //otherwise the program will keep looping looking for one
			switch(header)
			{
			case NOTE_HEADER:
				if(byte1 >= 0 && byte1 <= 87 &&
					byte2 >= Setting::minNoteVelocity && byte2 <= 127)
					notes[byte1].prepareToSchedule(byte2);
				break;
			case SUSTAIN_HEADER:
				sustain.prepareToSchedule(byte2);
				break;
			case SETTING_HEADER:
				updateSetting(static_cast<SettingID::SettingID>(byte1), byte2);
				break;
			case RESET_HEADER:
				resetAll();
				break;
			case VOLUME_HEADER:
				setVolume(byte2);
				break;
			}
		}
	}
}

void sendMidiToProMicro(byte note, byte velocity)
{
	//invert notes to be compatible with shift registers
	byte compatibleNote = (note * -1) + 87;
	byte message[3] ={ NOTE_HEADER, compatibleNote, velocity };
	//note that velocity is conformed on Pro Micro
	Serial.write(NOTE_HEADER);
	Serial.write(compatibleNote);
	Serial.write(velocity);
	//Serial.write(END_HEADER);
}

void customSerialToProMicro(byte header, byte byte1, byte byte2)
{
	Serial.write(header);
	Serial.write(byte1);
	Serial.write(byte2);
}