mirror of
https://github.com/m5stack/M5Stack.git
synced 2026-05-20 10:06:46 -07:00
sorz
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/******************************************************************************
|
|
* M5Snake : Input management from Gameboy faces *
|
|
* --------------------------------------------- *
|
|
* Management of input coming from the face Gameboy *
|
|
* Author: Olivier Staquet *
|
|
* Last version available on https://github.com/ostaquet/M5Snake *
|
|
*****************************************************************************/
|
|
#include "GameboyInput.h"
|
|
|
|
/**
|
|
* Initialize
|
|
*/
|
|
void GameboyInputClass::begin(uint8_t _i2c_address, uint8_t _pin_int_face) {
|
|
// Store local info
|
|
i2c_address = _i2c_address;
|
|
pin_int_face = _pin_int_face;
|
|
|
|
// Prepare the detection of activity
|
|
pinMode(pin_int_face, INPUT_PULLUP);
|
|
|
|
// Init the I2C
|
|
Wire.begin();
|
|
}
|
|
|
|
/**
|
|
* Check if button pressed and return which one
|
|
*/
|
|
uint8_t GameboyInputClass::getActivity() {
|
|
// Check if there is activity on interrupt
|
|
if(digitalRead(pin_int_face) == LOW) {
|
|
// If yes, request 1 byte from the panel
|
|
Wire.requestFrom(i2c_address, (uint8_t)1);
|
|
|
|
// Check if data on the I2C is available
|
|
while (Wire.available()) {
|
|
// Receive one byte as character
|
|
uint8_t key_val = Wire.read();
|
|
if(key_val != 0x00) {
|
|
return key_val;
|
|
}
|
|
}
|
|
}
|
|
|
|
// No activity to send back
|
|
return GAMEBOY_KEY_NONE;
|
|
}
|
|
|
|
GameboyInputClass GameboyInput;
|