77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2005 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \defgroup adc Generic ADC driver
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* \ingroup drivers
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* \{
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* \brief Analog to Digital Converter driver (ADC).
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*
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* <b>Configuration file</b>: cfg_adc.h
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*
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* \author Francesco Sacchi <batt@develer.com>
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*
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* $WIZ$ module_name = "adc"
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* $WIZ$ module_configuration = "bertos/cfg/cfg_adc.h"
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* $WIZ$ module_supports = "not atmega103"
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*/
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#ifndef DRV_ADC_H
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#define DRV_ADC_H
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#include <cfg/compiler.h>
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#include <cfg/debug.h>
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#include <cpu/attr.h>
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#include CPU_HEADER(adc)
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/** Type for ADC return value. */
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typedef uint16_t adcread_t;
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/** Type for channel */
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typedef uint8_t adc_ch_t;
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#define adc_bits() ADC_BITS
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adcread_t adc_read(adc_ch_t ch);
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void adc_init(void);
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/**
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* Macro used to convert data from adc range (0...(2 ^ADC_BITS - 1)) to
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* \a y1 ... \a y2 range.
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* \note \a y1, \a y2 can be negative, and put in ascending or descending order as well.
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* \note \a data and \a y2 are evaluated only once, \a y1 twice.
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*/
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#define ADC_RANGECONV(data, y1, y2) (((((int32_t)(data)) * ((y2) - (y1))) / ((1 << ADC_BITS) - 1)) + (y1))
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/** \} */ //defgroup adc
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#endif /* DRV_ADC_H */
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