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- /*!
- \file gd32f3x0_crc.h
- \brief definitions for the CRC
- */
- /*
- Copyright (C) 2017 GigaDevice
- 2017-06-06, V1.0.0, firmware for GD32F3x0
- */
- #ifndef GD32F3X0_CRC_H
- #define GD32F3X0_CRC_H
- #include "gd32f3x0.h"
- /* CRC definitions */
- #define CRC CRC_BASE
- /* registers definitions */
- #define CRC_DATA REG32((CRC) + 0x00U) /*!< CRC data register */
- #define CRC_FDATA REG32((CRC) + 0x04U) /*!< CRC free data register */
- #define CRC_CTL REG32((CRC) + 0x08U) /*!< CRC control register */
- #define CRC_IDATA REG32((CRC) + 0x10U) /*!< CRC initialization data register */
- #define CRC_POLY REG32((CRC) + 0x14U) /*!< CRC polynomial register */
- /* bits definitions */
- /* CRC_DATA */
- #define CRC_DATA_DATA BITS(0,31) /*!< CRC data bits */
- /* CRC_FDATA */
- #define CRC_FDATA_FDATA BITS(0,7) /*!< CRC free data bits */
- /* CRC_CTL */
- #define CRC_CTL_RST BIT(0) /*!< CRC reset bit */
- #define CRC_CTL_PS BITS(3,4) /*!< size of polynomial function bits */
- #define CRC_CTL_REV_I BITS(5,6) /*!< input data reverse function bits */
- #define CRC_CTL_REV_O BIT(7) /*!< output data reverse function bit */
- /* CRC_INIT */
- #define CRC_IDATA_IDATA BITS(0,31) /*!< CRC initialization data bits */
- /* CRC_POLY */
- #define CRC_POLY_POLY BITS(0,31) /*!< CRC polynomial value bits */
- /* constants definitions */
- /* size of polynomial function */
- #define CTL_PS(regval) (BITS(3, 4) & ((regval) << 3))
- #define CRC_CTL_PS_32 CTL_PS(0) /*!< 32-bit polynomial for CRC calculation */
- #define CRC_CTL_PS_16 CTL_PS(1) /*!< 16-bit polynomial for CRC calculation */
- #define CRC_CTL_PS_8 CTL_PS(2) /*!< 8-bit polynomial for CRC calculation */
- #define CRC_CTL_PS_7 CTL_PS(3) /*!< 7-bit polynomial for CRC calculation */
- /* input data reverse function */
- #define CTL_REV_I(regval) (BITS(5, 6) & ((regval) << 5))
- #define CRC_INPUT_DATA_NOT CTL_REV_I(0) /*!< input data not reverse */
- #define CRC_INPUT_DATA_BYTE CTL_REV_I(1) /*!< input data reversed by byte type */
- #define CRC_INPUT_DATA_HALFWORD CTL_REV_I(2) /*!< input data reversed by half-word type */
- #define CRC_INPUT_DATA_WORD CTL_REV_I(3) /*!< input data reversed by word type */
- /* function declarations */
- /* deinit CRC calculation unit */
- void crc_deinit(void);
- /* enable the reverse operation of output data */
- void crc_reverse_output_data_enable(void);
- /* disable the reverse operation of output data */
- void crc_reverse_output_data_disable(void);
- /* reset data register to the value of initializaiton data register */
- void crc_data_register_reset(void);
- /* read the data register */
- uint32_t crc_data_register_read(void);
- /* read the free data register */
- uint8_t crc_free_data_register_read(void);
- /* write the free data register */
- void crc_free_data_register_write(uint8_t free_data);
- /* write the initial value register */
- void crc_init_data_register_write(uint32_t init_data);
- /* configure the CRC input data function */
- void crc_input_data_reverse_config(uint32_t data_reverse);
- /* configure the CRC size of polynomial function */
- void crc_polynomial_size_set(uint32_t poly_size);
- /* configure the CRC polynomial value function */
- void crc_polynomial_set(uint32_t poly);
- /* CRC calculate a 32-bit data */
- uint32_t crc_single_data_calculate(uint32_t sdata);
- /* CRC calculate a 32-bit data array */
- uint32_t crc_block_data_calculate(uint32_t array[], uint32_t size);
- #endif /* GD32F3X0_CRC_H */
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