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https://github.com/arduino/Arduino.git
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133 lines
4.3 KiB
C
133 lines
4.3 KiB
C
/*
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%atmel_license%
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*/
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/**
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* \file
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*
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* \section 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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* \section 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_
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#define _ADC_
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/*----------------------------------------------------------------------------
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* Headers
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*----------------------------------------------------------------------------*/
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#include "../chip.h"
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#include <assert.h>
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#include <stdint.h>
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/*------------------------------------------------------------------------------
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* Definitions
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*------------------------------------------------------------------------------*/
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/* SAM3S */
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#define ADC_FREQ_MAX 20000000
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#define ADC_FREQ_MIN 1000000
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#define ADC_STARTUP_NORM 40
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#define ADC_STARTUP_FAST 12
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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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#define ADC_CHANNEL_8 8
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#define ADC_CHANNEL_9 9
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#define ADC_CHANNEL_10 10
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#define ADC_CHANNEL_11 11
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#define ADC_CHANNEL_12 12
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#define ADC_CHANNEL_13 13
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#define ADC_CHANNEL_14 14
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#define ADC_CHANNEL_15 15
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*------------------------------------------------------------------------------
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* Macros function of register access
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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 = ADC_CR_START)
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#define ADC_EnableChannel( pAdc, channel ) {\
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assert( (channel) < 16 ) ;\
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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) < 16 ) ;\
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(pAdc)->ADC_CHDR = (1 << (channel));\
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}
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#define ADC_EnableIt(pAdc, dwMode) {\
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(pAdc)->ADC_IER = (dwMode);\
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}
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#define ADC_DisableIt(pAdc, dwMode) {\
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(pAdc)->ADC_IDR = (dwMode);\
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}
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#define ADC_EnableTS(pAdc,dwMode) {\
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(pAdc)->ADC_ACR |= (dwMode);\
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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_ISR)
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#define ADC_GetCompareMode(pAdc) (((pAdc)->ADC_EMR)& (ADC_EMR_CMPMODE_Msk))
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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( Adc* pAdc, uint32_t idAdc );
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extern void ADC_CfgTiming( Adc* pAdc, uint32_t tracking, uint32_t settling, uint32_t transfer );
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extern void ADC_cfgFrequency( Adc* pAdc, uint32_t startup, uint32_t prescal );
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extern void ADC_CfgTrigering( Adc* pAdc, uint32_t trgEn, uint32_t trgSel, uint32_t freeRun );
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extern void ADC_CfgLowRes( Adc* pAdc, uint32_t resolution );
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extern void ADC_CfgPowerSave( Adc* pAdc, uint32_t sleep, uint32_t fwup );
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extern void ADC_CfgChannelMode( Adc* pAdc, uint32_t useq, uint32_t anach );
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extern void ADC_check( Adc* pAdc, uint32_t mck_freq );
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extern uint32_t ADC_GetConvertedData( Adc* pAdc, uint32_t dwChannel ) ;
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extern void ADC_SetCompareChannel( Adc* pAdc, uint32_t dwChannel ) ;
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extern void ADC_SetCompareMode( Adc* pAdc, uint32_t dwMode ) ;
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extern void ADC_SetComparisonWindow( Adc* pAdc, uint32_t dwHi_Lo ) ;
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extern uint32_t ADC_IsInterruptMasked( Adc* pAdc, uint32_t dwFlag ) ;
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extern uint32_t ADC_IsStatusSet( Adc* pAdc, uint32_t dwFlag ) ;
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extern uint32_t ADC_IsChannelInterruptStatusSet( uint32_t adc_sr, uint32_t dwChannel ) ;
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extern uint32_t ADC_ReadBuffer( Adc* pADC, int16_t *pwBuffer, uint32_t dwSize ) ;
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#ifdef __cplusplus
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}
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#endif
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#endif /* #ifndef _ADC_ */
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