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jeremybenn |
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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//------------------------------------------------------------------------------
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/// \unit
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///
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/// !Purpose
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///
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/// Interface for configuration the Analog-to-Digital Converter (ADC) peripheral.
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///
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/// !Usage
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///
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/// -# Configurate the pins for ADC
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/// -# Initialize the ADC with ADC_Initialize().
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/// -# Select the active channel using ADC_EnableChannel()
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/// -# Start the conversion with ADC_StartConversion()
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// -# Wait the end of the conversion by polling status with ADC_GetStatus()
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// -# Finally, get the converted data using ADC_GetConvertedData()
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///
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//------------------------------------------------------------------------------
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#ifndef ADC_H
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#define ADC_H
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include <utility/assert.h>
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//------------------------------------------------------------------------------
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// Definitions
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//------------------------------------------------------------------------------
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#define ADC_CHANNEL_0 0
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#define ADC_CHANNEL_1 1
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#define ADC_CHANNEL_2 2
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#define ADC_CHANNEL_3 3
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#define ADC_CHANNEL_4 4
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#define ADC_CHANNEL_5 5
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#define ADC_CHANNEL_6 6
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#define ADC_CHANNEL_7 7
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//------------------------------------------------------------------------------
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// Macros function of register access
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//------------------------------------------------------------------------------
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#define ADC_CfgModeReg(pAdc, mode) { \
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ASSERT(((mode)&0xF00000C0)== 0, "ADC Bad configuration ADC MR");\
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(pAdc)->ADC_MR = (mode);\
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}
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#define ADC_GetModeReg(pAdc) ((pAdc)->ADC_MR)
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#define ADC_StartConversion(pAdc) ((pAdc)->ADC_CR = AT91C_ADC_START)
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#define ADC_SoftReset(pAdc) ((pAdc)->ADC_CR = AT91C_ADC_SWRST)
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#define ADC_EnableChannel(pAdc, channel) {\
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ASSERT(channel < 8, "ADC Channel not exist");\
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(pAdc)->ADC_CHER = (1 << (channel));\
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}
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#define ADC_DisableChannel (pAdc, channel) {\
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ASSERT((channel) < 8, "ADC Channel not exist");\
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(pAdc)->ADC_CHDR = (1 << (channel));\
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}
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#define ADC_EnableIt(pAdc, mode) {\
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ASSERT(((mode)&0xFFF00000)== 0, "ADC bad interrupt IER");\
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(pAdc)->ADC_IER = (mode);\
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}
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#define ADC_DisableIt(pAdc, mode) {\
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ASSERT(((mode)&0xFFF00000)== 0, "ADC bad interrupt IDR");\
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(pAdc)->ADC_IDR = (mode);\
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}
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#define ADC_EnableDataReadyIt(pAdc) ((pAdc)->ADC_IER = AT91C_ADC_DRDY)
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#define ADC_GetStatus(pAdc) ((pAdc)->ADC_SR)
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#define ADC_GetChannelStatus(pAdc) ((pAdc)->ADC_CHSR)
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#define ADC_GetInterruptMaskStatus(pAdc) ((pAdc)->ADC_IMR)
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#define ADC_GetLastConvertedData(pAdc) ((pAdc)->ADC_LCDR)
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//------------------------------------------------------------------------------
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// Exported functions
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//------------------------------------------------------------------------------
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extern void ADC_Initialize (AT91S_ADC *pAdc,
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unsigned char idAdc,
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unsigned char trgEn,
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unsigned char trgSel,
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unsigned char sleepMode,
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unsigned char resolution,
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unsigned int mckClock,
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unsigned int adcClock,
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unsigned int startupTime,
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unsigned int sampleAndHoldTime);
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//extern void ADC_CfgModeReg(AT91S_ADC *pAdc, unsigned int mode);
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//extern unsigned int ADC_GetModeReg(AT91S_ADC *pAdc);
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//extern void ADC_EnableChannel(AT91S_ADC *pAdc, unsigned int channel);
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//extern void ADC_DisableChannel (AT91S_ADC *pAdc, unsigned int channel);
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//extern unsigned int ADC_GetChannelStatus(AT91S_ADC *pAdc);
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//extern void ADC_StartConversion(AT91S_ADC *pAdc);
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//extern void ADC_SoftReset(AT91S_ADC *pAdc);
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//extern unsigned int ADC_GetLastConvertedData(AT91S_ADC *pAdc);
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extern unsigned int ADC_GetConvertedData(AT91S_ADC *pAdc, unsigned int channel);
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//extern void ADC_EnableIt(AT91S_ADC *pAdc, unsigned int flag);
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//extern void ADC_EnableDataReadyIt(AT91S_ADC *pAdc);
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//extern void ADC_DisableIt(AT91S_ADC *pAdc, unsigned int flag);
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//extern unsigned int ADC_GetStatus(AT91S_ADC *pAdc);
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//extern unsigned int ADC_GetInterruptMaskStatus(AT91S_ADC *pAdc);
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extern unsigned int ADC_IsInterruptMasked(AT91S_ADC *pAdc, unsigned int flag);
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extern unsigned int ADC_IsStatusSet(AT91S_ADC *pAdc, unsigned int flag);
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extern unsigned char ADC_IsChannelInterruptStatusSet(unsigned int adc_sr,
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unsigned int channel);
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#endif //#ifndef ADC_H
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