AD5754.rar_AD5754_AD5754 驱动程序_ad5344驱动程序_ad5754 c

/***************************************************************************//** * @file ADF5754R.c * @brief Implementation of ADF5754R Driver. * @author DNechita ******************************************************************************** * 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: $WCREV$ *******************************************************************************/ /******************************************************************************/ /* Include Files */ /******************************************************************************/ #include "AD5754R.h" // AD5754R definitions. /***************************************************************************//** * @brief Initializes the SPI peripheral. * * @param None. * * @return status - Result of the initialization procedure. * Example: 0x0 - SPI peripheral was not initialized. * 0x1 - SPI peripheral is initialized. *******************************************************************************/ unsigned char AD5754R_Init(void) { unsigned char status = 0; GPIO1_PIN_OUT; GPIO2_PIN_OUT; AD5754R_LDAC_LOW; AD5754R_CLR_HIGH; status = SPI_Init(0, 1000000, 1, 1); return(status); } /***************************************************************************//** * @brief Writes data into a register. * * @param regBits - Address of the register. * @param adrBits - Address of a channel or of an option. * @param registerValue - Data value to write. * * @return None. *******************************************************************************/ void AD5754R_SetRegisterValue(unsigned char regBits, unsigned char adrBits, unsigned short registerValue) { unsigned char registerWord[4] = {0}; registerWord[0] = 0x01; // AD5754R CS. registerWord[1] = (regBits << 3) + adrBits; registerWord[2] = (registerValue & 0xFF00) >> 8; registerWord[3] = (registerValue & 0x00FF) >> 0; SPI_Write(registerWord,3); } /***************************************************************************//** * @brief Reads the value of a register. * * @param registerAddress - Address of the register. * * @return *dataPointer - Value of the register. *******************************************************************************/ unsigned short AD5754R_GetRegisterValue(unsigned char regBits, unsigned char adrBits) { unsigned char registerWord[4] = {0}; unsigned short data = 0; registerWord[0] = 0x01; // AD5754R CS. registerWord[1] = (1 << 7) + (regBits << 3) + adrBits; registerWord[2] = 0; registerWord[3] = 0; SPI_Write(registerWord,3); registerWord[0] = 0x01; // AD5754R CS. registerWord[1] = 0x18; // NOP instruction used in readback operations. registerWord[2] = 0; registerWord[3] = 0; SPI_Read(registerWord,3); data = (registerWord[1] << 8) + registerWord[2]; return(data); } /***************************************************************************//** * @brief Enables/disables indicated DAC channels. * * @param dacChannel - DAC channel or channels to be enabled/disabled. * Example: AD5754R_DAC_A - Channel A. * AD5754R_DAC_B - Channel B. * AD5754R_DAC_C - Channel C. * AD5754R_DAC_D - Channel D. * AD5754R_DAC_ALL - Channel ALL. * @param onOff - Enable or disable channel. * Example: 0x0 - Off. * 0x1 - On. * * @return None. *******************************************************************************/ void AD5754R_SetPower(unsigned char dacChannel, unsigned char onOff) { unsigned short oldPowerCtl = 0; unsigned short newPowerCtl = 0; if(dacChannel == AD5754R_DAC_ALL) { dacChannel = 0x0F; } else { dacChannel = (1 << dacChannel); } oldPowerCtl = AD5754R_GetRegisterValue(AD5754R_REG_POWER_CONTROL,0x00); newPowerCtl = oldPowerCtl & ~dacChannel; newPowerCtl = newPowerCtl | (onOff * dacChannel); AD5754R_SetRegisterValue(AD5754R_REG_POWER_CONTROL,0x00,newPowerCtl); } /***************************************************************************//** * @brief Writes data into a DAC channel register. * * @param dacChannel - DAC channel or channels to be written. * @param dacValue - Value written in DAC register. * * @return None. *******************************************************************************/ void AD5754R_LoadDac(unsigned char dacChannel, unsigned short dacValue) { AD5754R_SetRegisterValue(AD5754R_REG_DAC, dacChannel, dacValue); } /***************************************************************************//** * @brief Selects the output range of a DAC channel. * * @param dacChannel - DAC channel. * @param outputRange - Output range of a DAC channel. * * @return None. *******************************************************************************/ void AD5754R_RangeSelect(unsigned char dacChannel, unsigned char outputRange) { unsigned short registerData = 0; registerData |= outputRange; AD5754R_SetRegisterValue(AD5754R_REG_RANGE_SELECT,dacChannel,registerData); } /***************************************************************************//** * @brief Selects an option of Control Register. * * @param option - control function selected * @param bitValue - indicates a set or a clear of the following * bits: SDO disable * CRL select * Clamp enable * TSD enable * * @return None. ***