Type definitions for CRC functions

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Detailed Description

Data types used in connection with CRC computations.

This includes the type for variables that stores the data size in bytes, memory addresses in Flash, and pointers to memory. Both for Flash and EEPROM there are void pointer types and pointers to byte. Variables can be assigned a memory attribute with IAR. Therefore, pointers will be large enough to hold the address of a given variable. However, with GCC pointers have 16 bits. This means that if a device has a large program memory, we have to use 32-bits variables to store Flash addresses.

Typedefs
typedef uint32_t	crcbytenum_t
	Data type to use for byte counts in CRC computations. This type should be kept as small as possible to optimize for speed.
typedef uint32_t	flash_addr_t
	Data type for holding flash memory addresses. Depending of the size of the device it will be necessary to use 32 or 16 bits.
typedef const void *	eepromptr_t
	Generic pointer to EEPROM.
typedef const uint8_t *	eeprom_uint8ptr_t
	Pointer to a byte in EEPROM.
typedef const uint16_t *	eeprom_uint16ptr_t
	Pointer to two bytes in EEPROM.
typedef const uint32_t *	eeprom_uint32ptr_t
	Pointer to four bytes in EEPROM.
typedef flash_addr_t	flashptr_t
	Generic pointer to Flash.
typedef flash_addr_t	flash_uint8ptr_t
	Pointer to a byte in Flash.