stm32 CRC

http://www.emcu.it/CRC/CRCuk.html

Main Polynomials

• CRC-12 : X¹² + X¹¹ + X³ + X² + X + 1
        1100000001111
• CRC-16 : X¹⁶ + X¹⁵ + X² + 1
        11000000000000101
• CRC CCITT V41 : X¹⁶ + X¹² + X⁵ + 1  (This code is primarily used in the HDLC)
        10001000000100001
• CRC-32 (Ethernet) : = X³² + X²⁶ + X²³ + X²² + X¹⁶ + X¹² + X¹¹ + X¹⁰ + X⁸ + X⁷ + X⁵ + X⁴ + X² + X + 1
• CRC ARPA : X²⁴ + X²³+ X¹⁷ + X¹⁶ + X¹⁵ + X¹³ + X¹¹ + X¹⁰ + X⁹ + X⁸ + X⁵ + X³ + 1
• SDLC: X¹⁶ + X¹² + X⁵ + 1

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SW : apple CRC 32 : http://opensource.apple.com//source/xnu/xnu-1456.1.26/bsd/libkern/crc32.c


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STM CRC document

ref: http://www2.st.com/content/ccc/resource/technical/document/application_note/39/89/da/89/9e/d7/49/b1/DM00068118.pdf/files/DM00068118.pdf/jcr:content/translations/en.DM00068118.pdf

 STM32F4 :
     fix at 0x4C11DB7 = CRC-32 ethernet
     initial value : 0xFFFFFFFF

STM32F429 library - https://github.com/MaJerle/stm32f429


STM32 hardware document :
http://www.cs.hs-rm.de/~kaiser/1313_canacademy/STM42F4xx_Reference_manual_DM00031020.pdf

source code : https://code.csdn.net/icecut/scorpionboard/blob/master/ScorpionBoardUsbSerial/Drivers/STM32F3xx_HAL_Driver/Src/stm32f3xx_hal_crc.c


CRC example :

https://github.com/fboris/STM32Cube_FW_F4/blob/master/Projects/STM324xG_EVAL/Examples/CRC/CRC_Example/Src/main.c


mbed 3.0 CRC example source :

#include "mbed-drivers/mbed.h"

#define BUFFER_SIZE 114


// CRC

CRC_HandleTypeDef CrcHandle;

static const uint32_t aDataBuffer[BUFFER_SIZE] =
  {
    0x00001021, 0x20423063, 0x408450a5, 0x60c670e7, 0x9129a14a, 0xb16bc18c,
    0xd1ade1ce, 0xf1ef1231, 0x32732252, 0x52b54294, 0x72f762d6, 0x93398318,
    0xa35ad3bd, 0xc39cf3ff, 0xe3de2462, 0x34430420, 0x64e674c7, 0x44a45485,
    0xa56ab54b, 0x85289509, 0xf5cfc5ac, 0xd58d3653, 0x26721611, 0x063076d7,
    0x569546b4, 0xb75ba77a, 0x97198738, 0xf7dfe7fe, 0xc7bc48c4, 0x58e56886,
    0x78a70840, 0x18612802, 0xc9ccd9ed, 0xe98ef9af, 0x89489969, 0xa90ab92b,
    0x4ad47ab7, 0x6a961a71, 0x0a503a33, 0x2a12dbfd, 0xfbbfeb9e, 0x9b798b58,
    0xbb3bab1a, 0x6ca67c87, 0x5cc52c22, 0x3c030c60, 0x1c41edae, 0xfd8fcdec,
    0xad2abd0b, 0x8d689d49, 0x7e976eb6, 0x5ed54ef4, 0x2e321e51, 0x0e70ff9f,
    0xefbedfdd, 0xcffcbf1b, 0x9f598f78, 0x918881a9, 0xb1caa1eb, 0xd10cc12d,
    0xe16f1080, 0x00a130c2, 0x20e35004, 0x40257046, 0x83b99398, 0xa3fbb3da,
    0xc33dd31c, 0xe37ff35e, 0x129022f3, 0x32d24235, 0x52146277, 0x7256b5ea,
    0x95a88589, 0xf56ee54f, 0xd52cc50d, 0x34e224c3, 0x04817466, 0x64475424,
    0x4405a7db, 0xb7fa8799, 0xe75ff77e, 0xc71dd73c, 0x26d336f2, 0x069116b0,
    0x76764615, 0x5634d94c, 0xc96df90e, 0xe92f99c8, 0xb98aa9ab, 0x58444865,
    0x78066827, 0x18c008e1, 0x28a3cb7d, 0xdb5ceb3f, 0xfb1e8bf9, 0x9bd8abbb,
    0x4a755a54, 0x6a377a16, 0x0af11ad0, 0x2ab33a92, 0xed0fdd6c, 0xcd4dbdaa,
    0xad8b9de8, 0x8dc97c26, 0x5c644c45, 0x3ca22c83, 0x1ce00cc1, 0xef1fff3e,
    0xdf7caf9b, 0xbfba8fd9, 0x9ff86e17, 0x7e364e55, 0x2e933eb2, 0x0ed11ef0
  };

/* Expected CRC Value */
uint32_t uwExpectedCRCValue = 0x379E9F06;
// UART

Serial pc(PA_9, PA_10); //tx, rx

uint32_t uwCRCValue=0;

void app_start(int, char**) {
    pc.baud(38400);
   pc.printf("Wait 5 sec. \r\n");
   wait(5);
   pc.printf("Start CRC test\r\n");

   __HAL_RCC_CRC_CLK_ENABLE();
   CrcHandle.Instance = CRC;

   if ( HAL_CRC_Init(&CrcHandle) != HAL_OK ) {
        pc.printf("HAL_CRC_Init fail \r\n");
        while(1);
   }

   uwCRCValue = HAL_CRC_Accumulate(&CrcHandle, (uint32_t *)aDataBuffer, BUFFER_SIZE);

   pc.printf(" crc value = 0x%x \r\n", uwCRCValue);

   if ( uwCRCValue != uwExpectedCRCValue ) {
       pc.printf(" Not correct, right one is 0x%x \r\n", uwExpectedCRCValue);
   } else {
       pc.printf(" Correct ! \r\n");
   }
}





Test Result :

Wait 5 sec.
Start CRC test
 CRC clock enabled
 crc value = 0x379e9f06
 Correct !