BMS_Slave/ProjectSource/BMS_Slave_RCT/SSL_CpuRegisterTest.c

/**********************************************************************
* © 2010 Microchip Technology Inc.
*
* FileName:        SSL_CpuRegisterTest.c
* Dependencies:    Header (.h) files if applicable, see below
* Processor:       PIC16FXXX
* Compiler:        C18 v3.41
*
* SOFTWARE LICENSE AGREEMENT:
* Microchip Technology Inc. (“Microchip”) licenses this software to you
* solely for use with Microchip PIC® microcontroller
* products. The software is owned by Microchip and is protected under
* applicable copyright laws.  All rights reserved.
*
* SOFTWARE IS PROVIDED “AS IS.”  MICROCHIP EXPRESSLY DISCLAIMS ANY
* WARRANTY OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP
* BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL
* DAMAGES, LOST PROFITS OR LOST dataC, HARM TO YOUR EQUIPMENT, COST OF
* PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
* BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
* ANY CLAIMS FOR INDEMNITY OR CONTRIBUTION, OR OTHER SIMILAR COSTS.
*
* REVISION HISTORY:
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Author            Date      Comments on this revision
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*CT             09/15/2008  First release of source file
*Mike Cahill	11/11/2010  Updated for HI-TECH v9.80
*MVL		02/22/2011  Modified for HI-TECH v9.80 & v9.81
*VR             06/22/2012  Modified for C18 v3.41
*
*Version 	1.03
*
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ADDITIONAL NOTES:
*
**********************************************************************/
#include "SSL_CpuRegisterTest.h"


volatile uint8_t  tempWF, tempREG;


/********************************************************************************************
* Function Name: SSL_8bit_CPU_RegisterTest      
* 
* Description  : The "SSL_8bit_CPU_RegisterTest" function tests the CPU W register for stuck up 
*  faults, insuring that bits in the registers are not stuck at a value. This test can be done 
* by successively doing a write, read and check of 0x55 & 0xAA value into the W register.
* The Register is saved into RAM before the test is performed and restored after the test is done.
*
* Input        : None
*                
* Returns      : return value = 0 Test FAIL 
*                return value = 1 Test PASS 
*********************************************************************************************/
 uint16_t  SSL_CPU_RegisterTest( )
{
    uint8_t  cpuTestResult;

    // save the original value of W
    _asm
     MOVWF tempWF,1
    
    
    /* Test WREG with 0x55 */
    MOVLW 0x55
    MOVWF tempREG,1
    _endasm

    cpuTestResult= Test_Register(tempREG, 0x55);
    if(cpuTestResult == CPU_REGISTER_TEST_FAIL)
    {	
        _asm
        MOVF tempWF,0,1
        _endasm
	return CPU_REGISTER_TEST_FAIL;
    }

    // Test WREG with 0xAA
    _asm
    MOVLW 0xAA
    MOVWF tempREG,1
    _endasm

    cpuTestResult= Test_Register(tempREG, 0xAA);
    if(cpuTestResult==CPU_REGISTER_TEST_FAIL)
    {	
 	_asm
        MOVF tempWF,0,1
        _endasm
	return CPU_REGISTER_TEST_FAIL;
    }

    // POP the W-reg before return
    _asm
    MOVF tempWF,0,1
    _endasm

    //cpuTestResult = CPU_REGISTER_TEST_PASS ;
    return CPU_REGISTER_TEST_PASS;
}


uint16_t  Test_Register(uint8_t  tempREG, uint8_t  value)
{
    if (tempREG != value)
    {
        return CPU_REGISTER_TEST_FAIL;
    } 
    else
    {
	return  CPU_REGISTER_TEST_PASS;
    }
}