109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
#include <stdint.h>
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#include <Arduino.h>
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#include <PluggableUSB.h>
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#include "hid.h" // Modified HID library: doesn't prefix each packet with ID
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#include "instrument.h"
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//#include "blue.h" // Ginnie's blue guitar
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#include "standard.h" // Standard pins
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InstrumentButtonState buttonState;
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InstrumentButtonState lastState;
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void setup() {
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pinMode(STRUM_DOWN, INPUT_PULLUP);
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pinMode(STRUM_UP, INPUT_PULLUP);
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pinMode(TILT_SWITCH, INPUT_PULLUP);
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pinMode(BUTTON_GREEN, INPUT_PULLUP);
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pinMode(BUTTON_RED, INPUT_PULLUP);
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pinMode(BUTTON_YELLOW, INPUT_PULLUP);
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pinMode(BUTTON_BLUE, INPUT_PULLUP);
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pinMode(BUTTON_ORANGE, INPUT_PULLUP);
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pinMode(SOLO_GREEN, INPUT_PULLUP);
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pinMode(SOLO_RED, INPUT_PULLUP);
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pinMode(SOLO_YELLOW, INPUT_PULLUP);
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pinMode(SOLO_BLUE, INPUT_PULLUP);
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pinMode(SOLO_ORANGE, INPUT_PULLUP);
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pinMode(ANALOG_WAMMY, INPUT);
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pinMode(BUTTON_PLUS, INPUT_PULLUP);
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pinMode(BUTTON_MINUS, INPUT_PULLUP);
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// Initialize HID
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static HIDSubDescriptor node(_hidReportDescriptor, sizeof(_hidReportDescriptor));
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HID().AppendDescriptor(&node);
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buttonState.buttons = 0x0000;
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buttonState.hatAndConstant = 0x08;
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buttonState.axis[0] = 0;
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buttonState.axis[1] = 0;
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buttonState.axis[2] = 0;
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buttonState.axis[3] = 0;
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for (int i = 0; i < 12; i++) {
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buttonState.reserved1[i] = 0x0;
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}
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buttonState.finalConstant = 0x0200020002000200;
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buttonState.buttons = 0;
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buttonState.hatAndConstant = 0x08; // This apparently means "nothing pressed"
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}
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// The 3.3v Pro Micro is on the slow side.
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// Our strategy is to poll button state as quickly as possible,
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// send an update every 10ms,
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// and hope we don't miss anything while we're doing USB stuff.
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void loop() {
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static uint16_t buttons = 0;
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static unsigned long next = 0;
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unsigned long now = millis();
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buttons |= (0
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| (digitalRead(BUTTON_BLUE) << 0)
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| (digitalRead(BUTTON_GREEN) << 1)
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| (digitalRead(BUTTON_RED) << 2)
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| (digitalRead(BUTTON_YELLOW) << 3)
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| (digitalRead(BUTTON_ORANGE) << 4)
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| (digitalRead(TILT_SWITCH) << 5)
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| (digitalRead(STRUM_UP) << 6) // Not in USB packet
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| (digitalRead(STRUM_DOWN) << 7) // Not in USB packet
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| (digitalRead(BUTTON_MINUS) << 8)
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| (digitalRead(BUTTON_PLUS) << 9)
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| (digitalRead(SOLO_BLUE) << 10) // Not in USB packet
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| (digitalRead(SOLO_GREEN) << 11) // Not in USB packet
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| (digitalRead(SOLO_RED) << 12) // Not in USB packet
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| (digitalRead(SOLO_YELLOW) << 13) // Not in USB packet
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| (digitalRead(SOLO_ORANGE) << 14) // Not in USB packet
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);
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if (next > now) {
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return;
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}
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// Open pullup reads 1, so invert everything we've read
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buttons = ~buttons;
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buttonState.buttons = (buttons & 0b1100111111); // All directly-mappable bits
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buttonState.buttons |= ((buttons >> 10) & 0b11111); // Solo keys
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bitWrite(buttonState.buttons, 6, (buttons >> 10) & 0b11111); // Solo bit
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// I don't understand why any rational engineer would have done this.
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if (bitRead(buttons, 6)) {
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buttonState.hatAndConstant = 0x00; // up
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} else if (false) {
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buttonState.hatAndConstant = 0x02; // right
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} else if (bitRead(buttons, 7)) {
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buttonState.hatAndConstant = 0x04; // down
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} else if (false) {
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buttonState.hatAndConstant = 0x06; // left
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} else {
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buttonState.hatAndConstant = 0x08; // nothing
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}
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buttonState.axis[2] = analogRead(ANALOG_WAMMY) / 4;
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// Send an update
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HID().SendReport(0, (uint8_t *)&buttonState, 27);
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next = now + 10;
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buttons = 0;
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}
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