crc_config.c

Mplab C30编译器

#if defined(__PIC24F__)
#include <p24Fxxxx.h>
#endif
#include "crc.h"

#ifdef _CRC_PROG_V1

/********************************************************************************* 
   Function Prototype : void CRC_Config(UINT16 poly , UINT16 config)
   
   Include            : crc.h
   
   Description        : This function configures CRC module.
   
   Arguments          :  poly - Polynomial to calculate CRC
						 config - This contains the parameter configured in CRCCON
						          register as defined below
						          CRC Mode bit
						             CRC_IDLE_STOP
						             CRC_IDLE_CON
						          Valid words 
						             CRC_POLYNOMIAL_LEN1 
						             CRC_POLYNOMIAL_LEN2
						             ..... 
						             CRC_POLYNOMIAL_LEN15
						             CRC_POLYNOMIAL_LEN16
						          Start CRC bit 
						             CRC_START_SERIAL_SHIFT
						             CRC_SERIAL_SHIFT_OFF
						             
   Returns            : None
   
   Remarks            : This function configures the XOR of polynomial term and
                        CRCCON register.                                                      
***********************************************************************************/
void CRC_Config(UINT16 poly , UINT16 config)
{
   CRCXOR = poly;
   CRCCON = config;
}

#else
#warning "Does not build on this target"
#endif