84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*!
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*****************************************************************************
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@file: AD5940_SPI.c
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@author: $Author: nxu2 $
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@brief: Basic register read/write test example.
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@version: $Revision: 766 $
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@date: $Date: 2017-08-21 14:09:35 +0100 (Mon, 21 Aug 2017) $
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-----------------------------------------------------------------------------
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Copyright (c) 2017-2019 Analog Devices, Inc. All Rights Reserved.
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This software is proprietary to Analog Devices, Inc. and its licensors.
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By using this software you agree to the terms of the associated
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Analog Devices Software License Agreement.
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*****************************************************************************/
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/**
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* This example shows how to read/write AD5940 registers through SPI.
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* Use function called AD5940_ReadReg and AD5940_WriteReg.
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**/
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#include "ad5940.h"
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#include "AD5940.h"
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#include <stdio.h>
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#include "string.h"
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#include <stdlib.h>
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void AD5940_Main(void)
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{
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unsigned long temp, i;
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/**
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* Hardware reset can always put AD5940 to default state.
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* We recommend to use hardware reset rather than software reset
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* because there are some situations that SPI won't work, for example, AD59840 is in hibernate mode,
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* or AD5940 system clock is 32kHz that SPI bus clock should also be limited..
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* */
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AD5940_HWReset();
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/**
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* @note MUST call this function whenever there is reset happened. This function will put AD5940 to right state.
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* The reset can be software reset or hardware reset or power up reset.
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*/
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AD5940_Initialize();
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/**
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* Normal application code starts here.
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*/
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/**
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* Read register test.
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*/
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temp = AD5940_ReadReg(REG_AFECON_ADIID);
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printf("Read ADIID register, got: 0x%04lx\n", temp);
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if(temp != AD5940_ADIID)
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printf("Read register test failed.\n" );
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else
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printf("Read register test pass\n");
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/**
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* Write register test.
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* */
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srand(0x1234);
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i =10000;
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while(i--)
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{
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static unsigned long count;
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static unsigned long data;
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/* Generate a 32bit random data */
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data = rand()&0xffff;
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data <<= 16;
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data |= rand()&0xffff;
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count ++; /* Read write count */
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/**
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* Register CALDATLOCK is 32-bit width, it's readable and writable.
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* We use it to test SPI register access.
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*/
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AD5940_WriteReg(REG_AFE_CALDATLOCK, data);
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temp = AD5940_ReadReg(REG_AFE_CALDATLOCK);
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if(temp != data)
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printf("Write register test failed @0x%08lx\n", data);
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if(!(count%1000))
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printf("Read/Write has been done %ld times, latest data is 0x%08lx\n", count, data);
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}
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printf("SPI read/write test completed");
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while(1);
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}
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