CRC_POLYLENGTH_16B undeclared in STM32F030CCTx

[Soad]

In `STM32F030CCTx` I need to set the CRC in 16-bit length by calling

HAL_CRCEx_Polynomial_Set(MATRIX_UART_settings->crc, CRC_POLY, CRC_POLYLENGTH_16B);

but the compiler shows the error :

'CRC_POLYLENGTH_16B' undeclared (first use in this function)

in the `stm32f0xx_hal_crc.h` file `CRC_POLYLENGTH_16B` is defined under preprocessor directive like

#if defined(CRC_POL_POL)
/** @defgroup CRC_Polynomial_Sizes Polynomial sizes to configure the peripheral
* @{
*/
#define CRC_POLYLENGTH_32B 0x00000000U /*!< Resort to a 32-bit long generating polynomial */
#define CRC_POLYLENGTH_16B CRC_CR_POLYSIZE_0 /*!< Resort to a 16-bit long generating polynomial */
#define CRC_POLYLENGTH_8B CRC_CR_POLYSIZE_1 /*!< Resort to a 8-bit long generating polynomial */
#define CRC_POLYLENGTH_7B CRC_CR_POLYSIZE /*!< Resort to a 7-bit long generating polynomial */
/**
* @}
*/

/** @defgroup CRC_Polynomial_Size_Definitions CRC polynomial possible sizes actual definitions
* @{
*/
#define HAL_CRC_LENGTH_32B 32U /*!< 32-bit long CRC */
#define HAL_CRC_LENGTH_16B 16U /*!< 16-bit long CRC */
#define HAL_CRC_LENGTH_8B 8U /*!< 8-bit long CRC */
#define HAL_CRC_LENGTH_7B 7U /*!< 7-bit long CRC */
/**
* @}
*/
#endif /* CRC_POL_POL */

How can I access the `CRC_POLYLENGTH_16B`? and any documentation for using the HAL CRC library?

[TDK]

In your CubeMX project, activate CRC under the Computing tab. This will set the defines appropriately such that the crc headers are included.

Alternatively, modify stm32f0xx_hal_conf.h and uncomment #define HAL_CRC_MODULE_ENABLED. This will do the same thing provided you already have the appropriate HAL CRC files in your project.

[Soad]

In the CubeMX I have already activated the CRC 

and in stm21f0xx_hal_conf.h  file the  #define HAL_CRC_MODULE_ENABLED is already uncommented.

[Tesla DeLorean · Accepted solution]

The STM32F030CC does not support the programmable polynomial modes, it just supports the default 32-bit method.

The RM defines how the hardware functions, the HAL here is a relatively thin abstraction.

For 16-bit CRC you're going to need to use software methods.