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core_esp8266_wiring_analog.cpp
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core_esp8266_wiring_analog.cpp
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/*
analog.c - analogRead implementation for esp8266
Copyright (c) 2015 Hristo Gochkov. All rights reserved.
This file is part of the esp8266 core for Arduino environment.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18/06/2015 analogRead bugfix by Testato
*/
#include "wiring_private.h"
#include "pins_arduino.h"
#include "user_interface.h"
extern "C" {
extern int __analogRead(uint8_t pin)
{
// accept both A0 constant and ADC channel number
if(pin == 17 || pin == 0) {
return system_adc_read();
}
return digitalRead(pin) * 1023;
}
extern int analogRead(uint8_t pin) __attribute__ ((weak, alias("__analogRead")));
};