Information Block (OTP) read interface

Modules
	Information Block defines

Functions
uint16_t	crc15_highbitinput (uint16_t crc15val, uint8_t *input, int bitlength)
int	infoblock_readraw (uint32_t offset, uint8_t *data)
int	infoblock_read (uint32_t offset, uint8_t *data, int length)

Detailed Description

Read access for information block.

Function Documentation

crc15_highbitinput()

uint16_t crc15_highbitinput	(	uint16_t	crc15val,
		uint8_t *	input,
		int	bitlength
	)

crc15_highbitinput Calculate CRC15 on data bits

Parameters

[out]	crc15val	Calling routine must supply a pointer to an array of at least 32 btyes. The hash digest will be placed there.
[in]	input	pointer to the array of data to CRC15
[in]	bitlength	length in bits of the data to CRC15

Returns

crc15val

infoblock_read()

int infoblock_read	(	uint32_t	offset,
		uint8_t *	data,
		int	length
	)

infoblock_read Read formatted data from information block

Note

This routine uses the offest to determine the format of the data, and will read the correct number of raw bytes be able to return the number of data bytes specified. The CRC15 and formatting will be removed and the data returned.

Parameters

[in]	offset	location in the infoblock to read, this is a relative offset
[out]	data	pointer to array where data will be stored.
[in]	length	number of bytes to read

Returns

error_code error if unable to access infoblock

Return values

E_NO_ERROR	read was successful
E_BAD_PARAM	if incorrect length or offset is supplied

infoblock_readraw()

int infoblock_readraw	(	uint32_t	offset,
		uint8_t *	data
	)

infoblock_readraw Read raw data from information block

Parameters

[in]	offset	location in the infoblock to read, this is a relative offset
[out]	data	pointer to array where data will be stored.

Returns

error_code error if unable to access infoblock

Return values

E_NO_ERROR

read was successful