wiring_analog.h 2.09 KiB
/*
Copyright (c) 2011 Arduino. All right reserved.
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
*/
#ifndef _WIRING_ANALOG_
#define _WIRING_ANALOG_
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* \brief SAM3 products have only one reference for ADC
*/
typedef enum _eAnalogReference
{
AR_DEFAULT,
AR_INTERNAL,
AR_EXTERNAL
} eAnalogReference ;
/*
* \brief Configures the reference voltage used for analog input (i.e. the value used as the top of the input range).
* This function is kept only for compatibility with existing AVR based API.
*
* \param ulMmode Should be set to AR_DEFAULT.
*/
extern void analogReference( eAnalogReference ulMode ) ;
/*
* \brief Writes an analog value (PWM wave) to a pin.
*
* \param ulPin
* \param ulValue
*/
extern void analogWrite( uint32_t ulPin, uint32_t ulValue ) ;
/*
* \brief Reads the value from the specified analog pin.
*
* \param ulPin
*
* \return Read value from selected pin, if no error.
*/
extern uint32_t analogRead( uint32_t ulPin ) ;
/*
* \brief Set the resolution of analogRead return values. Default is 10 bits (range from 0 to 1023).
*
* \param res
*/
extern void analogReadResolution(int res);
/*
* \brief Set the resolution of analogWrite parameters. Default is 8 bits (range from 0 to 255).
*
* \param res
*/
extern void analogWriteResolution(int res);
extern void analogOutputInit( void ) ;
#ifdef __cplusplus
}
#endif
#endif /* _WIRING_ANALOG_ */