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internet.h
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internet.h
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/***************************************************************************//**
* @file AD7780.h
* @brief Header file of AD7780 Driver.
* @author DNechita (dan.nechita@analog.com)
********************************************************************************
* Copyright 2012(c) Analog Devices, Inc.
*
* 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 following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Analog Devices, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* - The use of this software may or may not infringe the patent rights
* of one or more patent holders. This license does not release you
* from the requirement that you obtain separate licenses from these
* patent holders to use this software.
* - Use of the software either in source or binary form, must be run
* on or directly connected to an Analog Devices Inc. component.
*
* THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, 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.
*
********************************************************************************
* SVN Revision: 809
*******************************************************************************/
#ifndef __AD7780_H__
#define __AD7780_H__
/******************************************************************************/
/***************************** Include Files **********************************/
/******************************************************************************/
#include <DSPI.h>
/******************************************************************************/
/******************* Macros and Constants Definitions *************************/
/******************************************************************************/
/* Communication definitions */
#define DEVICE_SPI_CLK_FREQ 1000000 // 1MHz SPI clock frequency */
/******************************************************************************/
/************************** AD7780 Definitions ********************************/
/******************************************************************************/
/* DOUT/RDY pin */
#define AD7780_RDY_PIN (PIN_DSPI0_SS + 2) // MISO pin
/* PDRST pin */
#define AD7780_PDRST_PIN PIN_DSPI0_SS
/* FILTER pin */
#define AD7780_FILTER_PIN 36 // IC1/RTCC/INT1/RD8
/* GAIN pin */
#define AD7780_GAIN_PIN 37 // C1IN+/AN5/CN7/RB5
/* Status bits */
#define AD7780_STAT_RDY (1 << 7) // Ready bit.
#define AD7780_STAT_FILTER (1 << 6) // Filter bit.
#define AD7780_STAT_ERR (1 << 5) // Error bit.
#define AD7780_STAT_ID1 (1 << 4) // ID bits.
#define AD7780_STAT_ID0 (1 << 3) // ID bits.
#define AD7780_STAT_GAIN (1 << 2) // Gain bit.
#define AD7780_STAT_PAT1 (1 << 1) // Status pattern bits.
#define AD7780_STAT_PAT0 (1 << 0) // Status pattern bits.
#define AD7780_ID_NUMBER 0x08
/******************************************************************************/
/************************ Functions Declarations ******************************/
/******************************************************************************/
class AD7780
{
private:
DSPI0 oDspi;
public:
/*! Initializes the communication peripheral and checks if the device is
present. */
char Init(void);
/*! Waits for DOUT/RDY pin to go low. */
char WaitRdyGoLow(void);
/*! Reads a 24-bit sample from the ADC. */
long ReadSample(unsigned char* pStatus);
/*! Converts the 24-bit raw value to volts. */
float ConvertToVoltage(long rawSample, float vRef, unsigned char gain);
};
#endif //__AD7780_H__