Cyclic Redundancy Check (CRC) Module with Memory Scanner example code

This is the example source code for the Cyclic Redundancy Check (CRC) Module with Memory Scanner

(Microchip microcontroller)

 

volatile unsigned int crc = 0; const uint8_t data[2] __at(0x800) = {0x6C, 0x93}; unsigned char data_size = 0; unsigned char data_index = 0; void main(void) {     // initialize the device     SYSTEM_Initialize();          SCANCON0bits.EN = 1;     SCANCON0bits.MODE = 0;     SCANCON0bits.INTM = 0;     SCANLADR = 0x800;     SCANHADR = 0x801;             CRCCON0bits.EN = 1;     CRCACC = 0xFFFF;     CRCXOR = 0x1021;     CRCCON1bits.DLEN = 15;     CRCCON1bits.PLEN = 15;     CRCCON0bits.ACCM = 1;     CRCCON0bits.SHIFTM = 0;     CRCCON0bits.CRCGO = 1;     SCANCON0bits.SCANGO = 1;     while(SCANCON0bits.SCANGO);     while(CRCCON0bits.BUSY);          crc = CRCACC;          while (1)     {         // Add your application code     } }

 

 

Will use 0x346C and 0x3493 value at 0x800 and 0x801 address in flash memory

https://www.lammertbies.nl/comm/info/crc-calculation.html

On-line CRC calculation and free library

To verify the CRC Calculation, I used On-line CRC Calculation and free library and put the value as "34633493" with Hex. And I got the calculated value as 0xF659 with CRC-CCITT (0xFFFF) and also I got the value as 0xF659 in MPLAB X debug mode as below.

 

 

CRC_PIC16F1618.X.zip

0.99MB