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49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
/******************************************************************************
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* M5Snake : Input management from Gameboy faces *
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* --------------------------------------------- *
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* Management of input coming from the face Gameboy *
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* Author: Olivier Staquet *
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* Last version available on https://github.com/ostaquet/M5Snake *
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*****************************************************************************/
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#include "GameboyInput.h"
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/**
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* Initialize
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*/
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void GameboyInputClass::begin(uint8_t _i2c_address, uint8_t _pin_int_face) {
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// Store local info
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i2c_address = _i2c_address;
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pin_int_face = _pin_int_face;
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// Prepare the detection of activity
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pinMode(pin_int_face, INPUT_PULLUP);
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// Init the I2C
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Wire.begin();
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}
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/**
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* Check if button pressed and return which one
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*/
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uint8_t GameboyInputClass::getActivity() {
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// Check if there is activity on interrupt
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if (digitalRead(pin_int_face) == LOW) {
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// If yes, request 1 byte from the panel
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Wire.requestFrom(i2c_address, (uint8_t)1);
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// Check if data on the I2C is available
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while (Wire.available()) {
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// Receive one byte as character
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uint8_t key_val = Wire.read();
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if (key_val != 0x00) {
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return key_val;
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}
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}
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}
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// No activity to send back
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return GAMEBOY_KEY_NONE;
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}
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GameboyInputClass GameboyInput;
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