foxBMS  1.6.0
The foxBMS Battery Management System API Documentation
crc.h
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41 
42 /**
43  * @file crc.h
44  * @author foxBMS Team
45  * @date 2022-02-22 (date of creation)
46  * @updated 2023-10-12 (date of last update)
47  * @version v1.6.0
48  * @ingroup DRIVERS
49  * @prefix CRC
50  *
51  * @brief crc module header
52  *
53  * @details Uses the system CRC hardware for data integrity calculation
54  */
55 
56 #ifndef FOXBMS__CRC_H_
57 #define FOXBMS__CRC_H_
58 
59 /*========== Includes =======================================================*/
60 
61 #include "HL_crc.h"
62 
63 #include "fstd_types.h"
64 
65 #include <stdint.h>
66 
67 /*========== Macros and Definitions =========================================*/
68 
69 /** High 32 bit part of the seed used for CRC calculation */
70 #define CRC_SEED_HIGH (0xBADC0DEDu)
71 /** Low 32 bit part of the seed used for CRC calculation */
72 #define CRC_SEED_LOW (0xDEADBEEFu)
73 /** Mask used to clear bits in config register to set CRC module to Data Capture Mode */
74 #define CRC_DATA_CAPTURE_MODE_CLEAR_MASK (0xFFFFFFFCu)
75 /** Mask used to set bits in config register to set CRC module to Full-CPU Mode */
76 #define CRC_FULL_CPU_MODE_SET_MASK (0x3u)
77 
78 /* Size in bits of a byte, used for shift operations */
79 #define CRC_BYTE_SIZE_IN_BITS (8u)
80 /* Size in bytes of a register, used for shift operations */
81 #define CRC_REGISTER_SIZE_IN_BYTES (4u)
82 /* Size in bits of a register, used for shift operations */
83 #define CRC_REGISTER_SIZE_IN_BITS (32u)
84 /* Literal used to reverse byte order */
85 #define CRC_REVERSE_BYTES_ORDER (3u)
86 
87 /** CRC signature register, low of high part to be used .
88  * The register is 64 bit wide but the data is read in
89  * 32 bit chunks. This indicates if the low or the high part
90  * has to be written.
91  */
92 typedef enum {
93  CRC_REGISTER_LOW, /* low part of register to be written */
94  CRC_REGISTER_HIGH, /* high part of register to be written */
96 
97 /*========== Extern Constant and Variable Declarations ======================*/
98 
99 /*========== Extern Function Prototypes =====================================*/
100 
101 /**
102  * @brief Computes CRC of data flow
103  * @details This function uses the hardware of the MCU.
104  * Data must be given in byte chunks.
105  * @param[in] pCrc uint64_t pointer to the calculated CRC
106  * @param[in] pData uint8_t pointer to the start of the data flow
107  * @param[in] lengthInBytes length in bytes of the data flow
108  * @returns #STD_OK if CRC hardware available, #STD_NOT_OK otherwise
109  */
110 extern STD_RETURN_TYPE_e CRC_CalculateCrc(uint64_t *pCrc, uint8_t *pData, uint32_t lengthInBytes);
111 
112 /*========== Externalized Static Functions Prototypes (Unit Test) ===========*/
113 #ifdef UNITY_UNIT_TEST
114 #endif
115 
116 #endif /* FOXBMS__CRC_H_ */
STD_RETURN_TYPE_e CRC_CalculateCrc(uint64_t *pCrc, uint8_t *pData, uint32_t lengthInBytes)
Computes CRC of data flow.
Definition: crc.c:76
CRC_REGISTER_SIDE_e
Definition: crc.h:92
@ CRC_REGISTER_HIGH
Definition: crc.h:94
@ CRC_REGISTER_LOW
Definition: crc.h:93
Definition of foxBMS standard types.
STD_RETURN_TYPE_e
Definition: fstd_types.h:82