mbed_example / Mbed OS CRC_example

CRC example to compute 32-bit CRC .

main.cpp@0:4ea3a9a52bb6, 2017-12-18 (annotated)

Committer:
deepikabhavnani
Date:
Mon Dec 18 22:53:07 2017 +0000
Revision:
0:4ea3a9a52bb6
Child:
1:6f792125397a
Fast and Slow CRC example

Who changed what in which revision?

UserRevisionLine numberNew contents of line
deepikabhavnani 0:4ea3a9a52bb6 1 #include "mbed.h"
deepikabhavnani 0:4ea3a9a52bb6 2 #include "mbed_crc.h"
deepikabhavnani 0:4ea3a9a52bb6 3 #include "SlowCRC.h"
deepikabhavnani 0:4ea3a9a52bb6 4 #include "FastCRC.h"
deepikabhavnani 0:4ea3a9a52bb6 5
deepikabhavnani 0:4ea3a9a52bb6 6 #define FAST_COMPUTE 1
deepikabhavnani 0:4ea3a9a52bb6 7
deepikabhavnani 0:4ea3a9a52bb6 8 #if defined(FAST_COMPUTE)
deepikabhavnani 0:4ea3a9a52bb6 9 #define CRC_TYPE FastCRC
deepikabhavnani 0:4ea3a9a52bb6 10 #else
deepikabhavnani 0:4ea3a9a52bb6 11 #define CRC_TYPE SlowCRC
deepikabhavnani 0:4ea3a9a52bb6 12 #endif
deepikabhavnani 0:4ea3a9a52bb6 13
deepikabhavnani 0:4ea3a9a52bb6 14 char test[] = "123456789";
deepikabhavnani 0:4ea3a9a52bb6 15 uint32_t crc;
deepikabhavnani 0:4ea3a9a52bb6 16
deepikabhavnani 0:4ea3a9a52bb6 17 int crc_ibm_16bit() {
deepikabhavnani 0:4ea3a9a52bb6 18 CRC_TYPE<uint16_t> ct(CRC_16BIT_IBM);
deepikabhavnani 0:4ea3a9a52bb6 19
deepikabhavnani 0:4ea3a9a52bb6 20 ct.init();
deepikabhavnani 0:4ea3a9a52bb6 21 ct.compute((void *)test, strlen((const char*)test), &crc);
deepikabhavnani 0:4ea3a9a52bb6 22
deepikabhavnani 0:4ea3a9a52bb6 23 printf("The CRC of 0x%x \"123456789\" is \"0xBB3D\" Result: 0x%x\n",
deepikabhavnani 0:4ea3a9a52bb6 24 ct.get_polynomial(), crc);
deepikabhavnani 0:4ea3a9a52bb6 25 ct.deinit();
deepikabhavnani 0:4ea3a9a52bb6 26 return 0;
deepikabhavnani 0:4ea3a9a52bb6 27 }
deepikabhavnani 0:4ea3a9a52bb6 28
deepikabhavnani 0:4ea3a9a52bb6 29 int crc_ccitt_16bit() {
deepikabhavnani 0:4ea3a9a52bb6 30 CRC_TYPE<uint16_t> ct(CRC_16BIT_CCITT);
deepikabhavnani 0:4ea3a9a52bb6 31
deepikabhavnani 0:4ea3a9a52bb6 32 ct.init();
deepikabhavnani 0:4ea3a9a52bb6 33 ct.compute((void *)test, strlen((const char*)test), &crc);
deepikabhavnani 0:4ea3a9a52bb6 34
deepikabhavnani 0:4ea3a9a52bb6 35 printf("The CRC of 0x%x \"123456789\" is \"0x29B1\" Result: 0x%x\n",
deepikabhavnani 0:4ea3a9a52bb6 36 ct.get_polynomial(), crc);
deepikabhavnani 0:4ea3a9a52bb6 37 ct.deinit();
deepikabhavnani 0:4ea3a9a52bb6 38 return 0;
deepikabhavnani 0:4ea3a9a52bb6 39 }
deepikabhavnani 0:4ea3a9a52bb6 40
deepikabhavnani 0:4ea3a9a52bb6 41 int crc_32_bit() {
deepikabhavnani 0:4ea3a9a52bb6 42 CRC_TYPE<uint32_t> ct(CRC_32BIT);
deepikabhavnani 0:4ea3a9a52bb6 43
deepikabhavnani 0:4ea3a9a52bb6 44 ct.init();
deepikabhavnani 0:4ea3a9a52bb6 45 ct.compute((void *)test, strlen((const char*)test), &crc);
deepikabhavnani 0:4ea3a9a52bb6 46
deepikabhavnani 0:4ea3a9a52bb6 47 printf("The CRC of 0x%x \"123456789\" is \"0xCBF43926\" Result: 0x%x\n",
deepikabhavnani 0:4ea3a9a52bb6 48 ct.get_polynomial(), crc);
deepikabhavnani 0:4ea3a9a52bb6 49 ct.deinit();
deepikabhavnani 0:4ea3a9a52bb6 50 return 0;
deepikabhavnani 0:4ea3a9a52bb6 51 }
deepikabhavnani 0:4ea3a9a52bb6 52
deepikabhavnani 0:4ea3a9a52bb6 53 int main() {
deepikabhavnani 0:4ea3a9a52bb6 54 crc_ibm_16bit();
deepikabhavnani 0:4ea3a9a52bb6 55 crc_ccitt_16bit();
deepikabhavnani 0:4ea3a9a52bb6 56 crc_32_bit();
deepikabhavnani 0:4ea3a9a52bb6 57 return 0;
deepikabhavnani 0:4ea3a9a52bb6 58 }