source: rtems/bsps/arm/atsam/include/libchip/include/acc.h @ 71c5552f

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/**
 *  \file
 *
 *  \section Purpose
 *
 *  Interface for configuration the Analog-to-Digital Converter (ACC) peripheral.
 *
 *  \section Usage
 *
 *  -# Configurate the pins for ACC
 *  -# Initialize the ACC with ACC_Initialize().
 *  -# Select the active channel using ACC_EnableChannel()
 *  -# Start the conversion with ACC_StartConversion()
 *  -# Wait the end of the conversion by polling status with ACC_GetStatus()
 *  -# Finally, get the converted data using ACC_GetConvertedData()
 *
 */
#ifndef _ACC_
#define _ACC_

/*----------------------------------------------------------------------------
 *        Headers
 *----------------------------------------------------------------------------*/
#include "chip.h"

#include <stdint.h>
#include <assert.h>

/*------------------------------------------------------------------------------
 *         Definitions
 *------------------------------------------------------------------------------*/
#define ACC_SELPLUS_AD12B0 0
#define ACC_SELPLUS_AD12B1 1
#define ACC_SELPLUS_AD12B2 2
#define ACC_SELPLUS_AD12B3 3
#define ACC_SELPLUS_AD12B4 4
#define ACC_SELPLUS_AD12B5 5
#define ACC_SELPLUS_AD12B6 6
#define ACC_SELPLUS_AD12B7 7
#define ACC_SELMINUS_TS 0
#define ACC_SELMINUS_ADVREF 1
#define ACC_SELMINUS_DAC0   2
#define ACC_SELMINUS_DAC1   3
#define ACC_SELMINUS_AD12B0 4
#define ACC_SELMINUS_AD12B1 5
#define ACC_SELMINUS_AD12B2 6
#define ACC_SELMINUS_AD12B3 7

#ifdef __cplusplus
extern "C" {
#endif

/*------------------------------------------------------------------------------
 *         Macros function of register access
 *------------------------------------------------------------------------------*/
#define ACC_CfgModeReg(pAcc, mode)  { \
                (pAcc)->ACC_MR = (mode);\
        }

#define ACC_GetModeReg(pAcc)                ((pAcc)->ACC_MR)

#define ACC_StartConversion(pAcc)           ((pAcc)->ACC_CR = ACC_CR_START)

#define ACC_SoftReset(pAcc)                 ((pAcc)->ACC_CR = ACC_CR_SWRST)

#define ACC_EnableChannel(pAcc, dwChannel)    {\
                assert(dwChannel < 16);\
                (pAcc)->ACC_CHER = (1 << (dwChannel));\
        }

#define ACC_DisableChannel(pAcc, dwChannel)  {\
                assert(dwChannel < 16);\
                (pAcc)->ACC_CHDR = (1 << (dwChannel));\
        }

#define ACC_EnableIt(pAcc, dwMode)            {\
                assert(((dwMode)&0xFFF00000)== 0);\
                (pAcc)->ACC_IER = (dwMode);\
        }

#define ACC_DisableIt(pAcc, dwMode)           {\
                assert(((dwMode)&0xFFF00000)== 0);\
                (pAcc)->ACC_IDR = (dwMode);\
        }

#define ACC_EnableDataReadyIt(pAcc)         ((pAcc)->ACC_IER = AT91C_ACC_DRDY)

#define ACC_GetStatus(pAcc)                 ((pAcc)->ACC_ISR)

#define ACC_GetChannelStatus(pAcc)          ((pAcc)->ACC_CHSR)

#define ACC_GetInterruptMaskStatus(pAcc)    ((pAcc)->ACC_IMR)

#define ACC_GetLastConvertedData(pAcc)      ((pAcc)->ACC_LCDR)

#define ACC_CfgAnalogCtrlReg(pAcc, dwMode)     {\
                assert(((dwMode) & 0xFFFCFF3C) == 0);\
                (pAcc)->ACC_ACR = (dwMode);\
        }

#define ACC_CfgExtModeReg(pAcc, extmode)    {\
                assert(((extmode) & 0xFF00FFFE) == 0);\
                (pAcc)->ACC_EMR = (extmode);\
        }

#define ACC_GetAnalogCtrlReg(pAcc)          ((pAcc)->ACC_ACR)

/*------------------------------------------------------------------------------
 *         Exported functions
 *------------------------------------------------------------------------------*/
extern void ACC_Configure(Acc *pAcc, uint8_t idAcc, uint8_t ucSelplus,
                                                   uint8_t ucSelminus, uint16_t wAc_en, uint16_t wEdge, uint16_t wInvert);

extern void ACC_SetComparisonPair(Acc *pAcc, uint8_t ucSelplus,
                                                                   uint8_t ucSelminus);

extern uint32_t ACC_GetComparisonResult(Acc *pAcc, uint32_t dwStatus);

#ifdef __cplusplus
}
#endif

#endif /* #ifndef _ACC_ */