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96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/**
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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 2008 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief ADC hardware-specific definition
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*
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* \author Daniele Basile <asterix@develer.com>
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*/
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#ifndef DRV_ADC_AT91_H
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#define DRV_ADC_AT91_H
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#include <hw/hw_cpufreq.h>
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#include "cfg/cfg_adc.h"
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#include <cfg/compiler.h>
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/**
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* ADC config define.
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*/
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#define ADC_MUX_MAXCH 8 //Max number of channel for ADC.
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#define ADC_BITS 10 //Bit resolution for ADC converter.
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/**
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* Macro for computing correct value to write into ADC
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* register.
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*/
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#define ADC_COMPUTED_PRESCALER (DIV_ROUNDUP(CPU_FREQ, 2 * CONFIG_ADC_CLOCK) - 1)
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#define ADC_COMPUTED_CLOCK (CPU_FREQ / ((ADC_COMPUTED_PRESCALER + 1) * 2))
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#define ADC_COMPUTED_STARTUPTIME (((CONFIG_ADC_STARTUP_TIME * ADC_COMPUTED_CLOCK) / 8000000UL) - 1)
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#define ADC_COMPUTED_SHTIME ((uint32_t)((CONFIG_ADC_SHTIME * (uint64_t)ADC_COMPUTED_CLOCK) / 1000000000UL) - 1)
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/**
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* Init pins macro for adc.
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*/
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/**
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* Define PIO controller for enable ADC function.
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* \{
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*/
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#if CPU_ARM_SAM7X
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#define ADC_PIO_DISABLE PIOB_PDR
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#define ADC_PIO_EN_FUNC PIOB_ASR
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#elif CPU_ARM_SAM7S_LARGE
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#define ADC_PIO_DISABLE PIOA_PDR
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#define ADC_PIO_EN_FUNC PIOA_BSR
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#else
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#error No ADC pins name definitions for selected ARM CPU
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#endif
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/*\}*/
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/**
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* Init the ADC pins.
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* Implement it if necessary.
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*/
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#define ADC_INIT_PINS() \
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do { \
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} while (0)
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void adc_hw_select_ch(uint8_t ch);
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uint16_t adc_hw_read(void);
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void adc_hw_init(void);
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#endif /* DRV_ADC_AT91_H */
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