/* ---------------------------------------------------------------------------- | |
* ATMEL Microcontroller Software Support | |
* ---------------------------------------------------------------------------- | |
* Copyright (c) 2009, Atmel Corporation | |
* | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are met: | |
* | |
* - Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the disclaimer below. | |
* | |
* Atmel's name may not be used to endorse or promote products derived from | |
* this software without specific prior written permission. | |
* | |
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR | |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE | |
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, | |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, | |
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* ---------------------------------------------------------------------------- | |
*/ | |
/** | |
* \file | |
* | |
* \section Purpose | |
* | |
* Interface for configuration the Analog-to-Digital Converter (ADC) peripheral. | |
* | |
* \section Usage | |
* | |
* -# Configurate the pins for ADC | |
* -# Initialize the ADC with ADC_Initialize(). | |
* -# Select the active channel using ADC_EnableChannel() | |
* -# Start the conversion with ADC_StartConversion() | |
* -# Wait the end of the conversion by polling status with ADC_GetStatus() | |
* -# Finally, get the converted data using ADC_GetConvertedData() | |
* | |
*/ | |
#ifndef _ADC_ | |
#define _ADC_ | |
/*---------------------------------------------------------------------------- | |
* Headers | |
*----------------------------------------------------------------------------*/ | |
#include "chip.h" | |
#include <assert.h> | |
#include <stdint.h> | |
/*------------------------------------------------------------------------------ | |
* Definitions | |
*------------------------------------------------------------------------------*/ | |
/* SAM3S */ | |
#define ADC_FREQ_MAX 20000000 | |
#define ADC_FREQ_MIN 1000000 | |
#define ADC_STARTUP_NORM 40 | |
#define ADC_STARTUP_FAST 12 | |
#define ADC_CHANNEL_0 0 | |
#define ADC_CHANNEL_1 1 | |
#define ADC_CHANNEL_2 2 | |
#define ADC_CHANNEL_3 3 | |
#define ADC_CHANNEL_4 4 | |
#define ADC_CHANNEL_5 5 | |
#define ADC_CHANNEL_6 6 | |
#define ADC_CHANNEL_7 7 | |
#define ADC_CHANNEL_8 8 | |
#define ADC_CHANNEL_9 9 | |
#define ADC_CHANNEL_10 10 | |
#define ADC_CHANNEL_11 11 | |
#define ADC_CHANNEL_12 12 | |
#define ADC_CHANNEL_13 13 | |
#define ADC_CHANNEL_14 14 | |
#define ADC_CHANNEL_15 15 | |
#ifdef __cplusplus | |
extern "C" { | |
#endif | |
/*------------------------------------------------------------------------------ | |
* Macros function of register access | |
*------------------------------------------------------------------------------*/ | |
#define ADC_GetModeReg( pAdc ) ((pAdc)->ADC_MR) | |
#define ADC_StartConversion( pAdc ) ((pAdc)->ADC_CR = ADC_CR_START) | |
#define ADC_EnableChannel( pAdc, channel ) {\ | |
assert( channel < 16 ) ;\ | |
(pAdc)->ADC_CHER = (1 << (channel));\ | |
} | |
#define ADC_DisableChannel(pAdc, channel) {\ | |
assert( (channel) < 16 ) ;\ | |
(pAdc)->ADC_CHDR = (1 << (channel));\ | |
} | |
#define ADC_EnableIt(pAdc, dwMode) {\ | |
(pAdc)->ADC_IER = (dwMode);\ | |
} | |
#define ADC_DisableIt(pAdc, dwMode) {\ | |
(pAdc)->ADC_IDR = (dwMode);\ | |
} | |
#define ADC_EnableTS(pAdc,dwMode) {\ | |
(pAdc)->ADC_ACR |= dwMode;\ | |
} | |
#define ADC_EnableDataReadyIt(pAdc) ((pAdc)->ADC_IER = AT91C_ADC_DRDY) | |
#define ADC_GetStatus(pAdc) ((pAdc)->ADC_ISR) | |
#define ADC_GetCompareMode(pAdc) (((pAdc)->ADC_EMR)& (ADC_EMR_CMPMODE_Msk)) | |
#define ADC_GetChannelStatus(pAdc) ((pAdc)->ADC_CHSR) | |
#define ADC_GetInterruptMaskStatus(pAdc) ((pAdc)->ADC_IMR) | |
#define ADC_GetLastConvertedData(pAdc) ((pAdc)->ADC_LCDR) | |
/*------------------------------------------------------------------------------ | |
* Exported functions | |
*------------------------------------------------------------------------------*/ | |
extern void ADC_Initialize( Adc* pAdc, uint32_t idAdc ); | |
extern void ADC_CfgTiming( Adc* pAdc, uint32_t tracking, uint32_t settling, uint32_t transfer ); | |
extern void ADC_cfgFrequency( Adc* pAdc, uint32_t startup, uint32_t prescal ); | |
extern void ADC_CfgTrigering( Adc* pAdc, uint32_t trgEn, uint32_t trgSel, uint32_t freeRun ); | |
extern void ADC_CfgLowRes( Adc* pAdc, uint32_t resolution ); | |
extern void ADC_CfgPowerSave( Adc* pAdc, uint32_t sleep, uint32_t fwup ); | |
extern void ADC_CfgChannelMode( Adc* pAdc, uint32_t useq, uint32_t anach ); | |
extern void ADC_check( Adc* pAdc, uint32_t mck_freq ); | |
extern uint32_t ADC_GetConvertedData( Adc* pAdc, uint32_t dwChannel ) ; | |
extern void ADC_SetCompareChannel( Adc* pAdc, uint32_t dwChannel ) ; | |
extern void ADC_SetCompareMode( Adc* pAdc, uint32_t dwMode ) ; | |
extern void ADC_SetComparisonWindow( Adc* pAdc, uint32_t dwHi_Lo ) ; | |
extern uint32_t ADC_IsInterruptMasked( Adc* pAdc, uint32_t dwFlag ) ; | |
extern uint32_t ADC_IsStatusSet( Adc* pAdc, uint32_t dwFlag ) ; | |
extern uint32_t ADC_IsChannelInterruptStatusSet( uint32_t adc_sr, uint32_t dwChannel ) ; | |
extern uint32_t ADC_ReadBuffer( Adc* pADC, int16_t *pwBuffer, uint32_t dwSize ) ; | |
#ifdef __cplusplus | |
} | |
#endif | |
#endif /* #ifndef _ADC_ */ |