c - 如何设置STM32生成标准的CRC32

Question

我正在尝试使用 STM32L4 硬件模块生成 CRC。我想验证 fatfs 文件，所以基本上我有字节数组。我正在使用这个 CRC generator .

不幸的是，我不知道如何设置 STM32L4 来生成相同的结果。我需要 CRC32 并且我有

配置:

hcrc.Instance = CRC;

/* The default polynomial is not used. It is required to defined it in CrcHandle.Init.GeneratingPolynomial*/
hcrc.Init.DefaultPolynomialUse    = DEFAULT_POLYNOMIAL_DISABLE;
/* Set the value of the polynomial */
hcrc.Init.GeneratingPolynomial    = 0x4C11DB7;
//hcrc.Init.GeneratingPolynomial    = 0xFB3EE248;
hcrc.Init.CRCLength= CRC_POLYLENGTH_32B;
/* The default init value is used */
/* The default init value is not used */
hcrc.Init.DefaultInitValueUse     = DEFAULT_INIT_VALUE_ENABLE;

/* User init value is used instead */
//hcrc.Init.InitValue               = 0;
hcrc.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE;
//hcrc.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_BYTE;
/* The input data are inverted by word */
//hcrc.Init.InputDataInversionMode  = CRC_INPUTDATA_INVERSION_WORD;

//hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_ENABLE;
hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;
hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES;
HAL_CRC_Init(&hcrc);

测试:

uint8_t test[] = {49,50,51,52};
uint32_t uwCRCValue = HAL_CRC_Calculate(&hcrc,(uint32_t *) test, 4);

结果:A695C4AA

我没有想法。有一种方法可以让我成功地拥有 uint32_t test[] 并将输入设置为 hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES; 不幸的是我有 uint8_t...

Answer 1

使用 CubeMX，我生成了这些设置:

hcrc.Instance = CRC;
hcrc.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_ENABLE;
hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_ENABLE;
hcrc.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_BYTE;
hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_ENABLE;
hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES;

像这样计算CRC:

uint32_t crc = HAL_CRC_Calculate(&hcrc, (uint32_t *)address, length);

最后反转:

crc = ~crc;