mockband/MockBand.ino

105 lines
3.2 KiB
C++

#include <stdint.h>
#include <Arduino.h>
#include <PluggableUSB.h>
#include "hid.hh" // Modified HID library: doesn't prefix each packet with ID
#include "instrument.hh"
//#include "blue.hh" // Ginnie's blue guitar
#include "standard.hh" // Standard pins
// How often do you want to send an update?
// Smaller number: lower latency, but more bounces
// Bigger number: higher latency
// 20ms feels pretty good to me
#define UPDATE_INTERVAL_MS 20
InstrumentButtonState buttonState;
void setup() {
pinMode(STRUM_DOWN, INPUT_PULLUP);
pinMode(STRUM_UP, INPUT_PULLUP);
pinMode(TILT_SWITCH, INPUT_PULLUP);
pinMode(BUTTON_GREEN, INPUT_PULLUP);
pinMode(BUTTON_RED, INPUT_PULLUP);
pinMode(BUTTON_YELLOW, INPUT_PULLUP);
pinMode(BUTTON_BLUE, INPUT_PULLUP);
pinMode(BUTTON_ORANGE, INPUT_PULLUP);
pinMode(SOLO_GREEN, INPUT_PULLUP);
pinMode(SOLO_RED, INPUT_PULLUP);
pinMode(SOLO_YELLOW, INPUT_PULLUP);
pinMode(SOLO_BLUE, INPUT_PULLUP);
pinMode(SOLO_ORANGE, INPUT_PULLUP);
pinMode(ANALOG_WAMMY, INPUT);
pinMode(BUTTON_PLUS, INPUT_PULLUP);
pinMode(BUTTON_MINUS, INPUT_PULLUP);
// Initialize HID
static HIDSubDescriptor node(_hidReportDescriptor, sizeof(_hidReportDescriptor));
HID().AppendDescriptor(&node);
buttonState.axis[0] = 0;
buttonState.axis[1] = 0;
buttonState.axis[2] = 0;
buttonState.axis[3] = 0;
for (int i = 0; i < 12; i++) {
buttonState.reserved1[i] = 0x0;
}
buttonState.finalConstant = 0x0200020002000200;
}
// The 3.3v Pro Micro is on the slow side.
// Our strategy is to poll button state as quickly as possible,
// send an update every 10ms,
// and hope we don't miss anything while we're doing USB stuff.
void loop() {
register uint16_t buttons = 0;
unsigned long next = 0;
while (1) {
unsigned long now = millis();
buttons |= ~(0
| (digitalRead(BUTTON_BLUE) << 0)
| (digitalRead(BUTTON_GREEN) << 1)
| (digitalRead(BUTTON_RED) << 2)
| (digitalRead(BUTTON_YELLOW) << 3)
| (digitalRead(BUTTON_ORANGE) << 4)
| (digitalRead(TILT_SWITCH) << 5)
| (digitalRead(STRUM_UP) << 6) // Not in USB packet
| (digitalRead(STRUM_DOWN) << 7) // Not in USB packet
| (digitalRead(BUTTON_MINUS) << 8)
| (digitalRead(BUTTON_PLUS) << 9)
| (digitalRead(SOLO_BLUE) << 10) // Not in USB packet
| (digitalRead(SOLO_GREEN) << 11) // Not in USB packet
| (digitalRead(SOLO_RED) << 12) // Not in USB packet
| (digitalRead(SOLO_YELLOW) << 13) // Not in USB packet
| (digitalRead(SOLO_ORANGE) << 14) // Not in USB packet
);
if (now < next) {
continue;
}
next = now + 20;
buttonState.buttons = (buttons & 0b1100111111); // All directly-mappable bits
buttonState.buttons |= ((buttons >> 10) & 0b11111); // Solo keys
bitWrite(buttonState.buttons, 6, (buttons >> 10) & 0b11111); // Solo bit
// I don't understand why any rational engineer would have done this.
buttonState.hatAndConstant = (0x08
^ (bitRead(buttons, 6) << 4) // up
// right << 3
^ (bitRead(buttons, 7) << 2) // down
// left << 1
);
buttonState.axis[2] = analogRead(ANALOG_WAMMY) / 4;
// Send an update
HID().SendReport(0, (uint8_t *)&buttonState, 27);
buttons = 0;
}
}