STM32F030RC CRC value wrong

[Treacy Yao]

Posted on January 23, 2018 at 03:59

I want to add crc function for the IAP-APP function. So I used the CRC example inSTM32Cube_FW_F0_V1.9.0 to test. But

uwCRCValue

is always 0. I think the

uwExpectedCRCValue

should be the last four byte (0x0803FFFB-

0x0803FFFF

), and

uwCRCValue

should be the same value. Attach is the IAR configuration for CRC. Did my understanding wrong or my code below is wrong?

#define BUFFER_SIZE 114

static const uint32_t aDataBuffer[BUFFER_SIZE]

#ifdef PUBLIC_C

=

{

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

}

#endif

;

static void MX_CRC_Init(void)

{

CrcHandle.Instance = CRC;

/* The default polynomial is not used. It is required to defined it in CrcHandle.Init.GeneratingPolynomial*/

CrcHandle.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_ENABLE;

/* Set the value of the polynomial */

//CrcHandle.Init.GeneratingPolynomial = DEFAULT_POLYNOMIAL_ENABLE;

/* The size of the polynomial to configure the IP is 8b*/

CrcHandle.Init.CRCLength = CRC_POLYLENGTH_32B;

/* The default init value is used */

CrcHandle.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_DISABLE;

/* The input data are not inverted */

CrcHandle.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE;

/* The output data are not inverted */

CrcHandle.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;

/* The input data are 32 bits lenght */

CrcHandle.InputDataFormat = CRC_INPUTDATA_FORMAT_WORDS;

if (HAL_CRC_Init(&CrcHandle) != HAL_OK)

{

/* Initialization Error */

Error_Handler();

}

}

void APP_CRC(void)

{

/*##-2- Compute the CRC of 'aDataBuffer' ###################################*/

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

TRACE_DBG_STRING(DEBUG_MODULE, LOG_LVL_INFO, 'APP_CRC: %x,%x', uwCRCValue,uwExpectedCRCValue);

/*##-3- Compare the CRC value to the Expected one ##########################*/

if (uwCRCValue != uwExpectedCRCValue)

{

/* Wrong CRC value: enter Error_Handler */

TRACE_DBG_STRING(DEBUG_MODULE, LOG_LVL_INFO, 'CRC err');

//Error_Handler();

}

else

{

/* Right CRC value: Turn LED2 on */

TRACE_DBG_STRING(DEBUG_MODULE, LOG_LVL_INFO, 'CRC success');

}

}

Note: this post was migrated and contained many threaded conversations, some content may be missing.

[Tesla DeLorean]

Posted on January 23, 2018 at 04:22

Can't see attachments, but this code won't sum across the ROM

Make sure you enable the clock, otherwise the peripheral will return zero

/* CRC Peripheral clock enable */

__HAL_RCC_CRC_CLK_ENABLE();

[Treacy Yao]

Posted on January 23, 2018 at 06:17

Above is the IAR for CRC configuration.

I tried 

__HAL_RCC_CRC_CLK_ENABLE(); but still the same result(

uwCRCValue

is always 0

)

Below is my code.

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct;

  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  RCC_PeriphCLKInitTypeDef PeriphClkInit;

    /**Initializes the CPU, AHB and APB busses clocks

    */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI14|RCC_OSCILLATORTYPE_HSE

                              |RCC_OSCILLATORTYPE_LSE;

  RCC_OscInitStruct.HSEState = RCC_HSE_ON;

  RCC_OscInitStruct.LSEState = RCC_LSE_ON;

  RCC_OscInitStruct.HSIState = RCC_HSI_ON;

  RCC_OscInitStruct.HSI14State = RCC_HSI14_ON;

  RCC_OscInitStruct.HSI14CalibrationValue = 16;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;

  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL3;

  RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

    /**Initializes the CPU, AHB and APB busses clocks

    */

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                              |RCC_CLOCKTYPE_PCLK1;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)

  {

    Error_Handler();

  }

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_I2C1

                              |RCC_PERIPHCLK_RTC;

  PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_SYSCLK;

  PeriphClkInit.I2c1ClockSelection = RCC_I2C1CLKSOURCE_SYSCLK;

  PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;

  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)

  {

    Error_Handler();

  }

    /**Configure LSE Drive Capability

    */

  __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

    /**Configure the Systick interrupt time

    */

  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

    /**Configure the Systick

    */

  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  /* SysTick_IRQn interrupt configuration */

  HAL_NVIC_SetPriority(SysTick_IRQn, 3, 0);

}

static void MX_CRC_Init(void)

{

 CrcHandle.Instance = CRC;

 /* The default polynomial is not used. It is required to defined it in CrcHandle.Init.GeneratingPolynomial*/ 

 CrcHandle.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_ENABLE;

 /* Set the value of the polynomial */

 //CrcHandle.Init.GeneratingPolynomial = DEFAULT_POLYNOMIAL_ENABLE;

 /* The size of the polynomial to configure the IP is 8b*/

 CrcHandle.Init.CRCLength = CRC_POLYLENGTH_32B;

 /* The default init value is used */

 CrcHandle.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_DISABLE;

 /* The input data are not inverted */

 CrcHandle.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE;

 /* The output data are not inverted */

 CrcHandle.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;

 /* The input data are 32 bits lenght */

 CrcHandle.InputDataFormat = CRC_INPUTDATA_FORMAT_WORDS;

__HAL_RCC_CRC_CLK_ENABLE();

 

 if (HAL_CRC_Init(&CrcHandle) != HAL_OK)

 {

  /* Initialization Error */

  Error_Handler();

 }

}

[Treacy Yao]

Posted on January 23, 2018 at 06:59

I tried again. It is useful to add

__HAL_RCC_CRC_CLK_ENABLE(); , I get the 

uwCRCValue

=ebf5058c, but the IAR tool add the CRC value in the bin file is 81539A62. It is not the same.