[136] | 1 | /*
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| 2 | Copyright (c) 2011 Arduino. All right reserved.
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| 3 |
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| 4 | This library is free software; you can redistribute it and/or
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| 5 | modify it under the terms of the GNU Lesser General Public
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| 6 | License as published by the Free Software Foundation; either
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| 7 | version 2.1 of the License, or (at your option) any later version.
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| 8 |
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| 9 | This library is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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| 12 | See the GNU Lesser General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU Lesser General Public
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| 15 | License along with this library; if not, write to the Free Software
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| 16 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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| 17 | */
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| 18 |
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| 19 | #ifndef _WIRING_ANALOG_
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| 20 | #define _WIRING_ANALOG_
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| 21 |
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| 22 | #include <stdint.h>
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| 23 |
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| 24 | #ifdef __cplusplus
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| 25 | extern "C" {
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| 26 | #endif
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| 27 |
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| 28 | /*
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| 29 | * \brief SAM3 products have only one reference for ADC
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| 30 | */
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| 31 | typedef enum _eAnalogReference
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| 32 | {
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| 33 | AR_DEFAULT,
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| 34 | AR_INTERNAL,
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| 35 | AR_EXTERNAL
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| 36 | } eAnalogReference ;
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| 37 |
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| 38 |
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| 39 | /*
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| 40 | * \brief Configures the reference voltage used for analog input (i.e. the value used as the top of the input range).
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| 41 | * This function is kept only for compatibility with existing AVR based API.
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| 42 | *
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| 43 | * \param ulMmode Should be set to AR_DEFAULT.
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| 44 | */
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| 45 | extern void analogReference( eAnalogReference ulMode ) ;
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| 46 |
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| 47 | /*
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| 48 | * \brief Writes an analog value (PWM wave) to a pin.
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| 49 | *
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| 50 | * \param ulPin
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| 51 | * \param ulValue
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| 52 | */
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| 53 | extern void analogWrite( uint32_t ulPin, uint32_t ulValue ) ;
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| 54 |
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| 55 | /*
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| 56 | * \brief Reads the value from the specified analog pin.
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| 57 | *
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| 58 | * \param ulPin
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| 59 | *
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| 60 | * \return Read value from selected pin, if no error.
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| 61 | */
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| 62 | extern uint32_t analogRead( uint32_t ulPin ) ;
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| 63 |
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| 64 | /*
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| 65 | * \brief Set the resolution of analogRead return values. Default is 10 bits (range from 0 to 1023).
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| 66 | *
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| 67 | * \param res
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| 68 | */
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| 69 | extern void analogReadResolution(int res);
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| 70 |
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| 71 | /*
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| 72 | * \brief Set the resolution of analogWrite parameters. Default is 8 bits (range from 0 to 255).
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| 73 | *
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| 74 | * \param res
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| 75 | */
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| 76 | extern void analogWriteResolution(int res);
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| 77 |
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| 78 | extern void analogOutputInit( void ) ;
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| 79 |
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| 80 | #ifdef __cplusplus
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| 81 | }
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| 82 | #endif
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| 83 |
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| 84 | #endif /* _WIRING_ANALOG_ */
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