Register Functions

These functions handle manipulating values in the MCP2515's registers. More...

Functions
int	mcp2515_register_read (pi_mcp2515_t *pi_mcp2515, uint8_t *data, uint8_t len, mcp2515_rgstr_t rgstr)
	Read a value from a specified register.
int	mcp2515_register_write (pi_mcp2515_t *pi_mcp2515, uint8_t values[], uint8_t len, mcp2515_rgstr_t rgstr)
	Write a value to the specified register.
int	mcp2515_register_bitmod (pi_mcp2515_t *pi_mcp2515, const uint8_t data, const uint8_t mask, const mcp2515_rgstr_t rgstr)
	Change the value of a register via an SPI bit modify.

Detailed Description

These functions handle manipulating values in the MCP2515's registers.

Function Documentation

mcp2515_register_bitmod()

int mcp2515_register_bitmod	(	pi_mcp2515_t *	pi_mcp2515,
		const uint8_t	data,
		const uint8_t	mask,
		const mcp2515_rgstr_t	rgstr )

Change the value of a register via an SPI bit modify.

Parameters

pi_mcp2515	the piMCP2515 handle.
data	the data to use for the bitmod.
mask	the mask to apply where only bits with a 1 value will be updated in the register with the data values.
rgstr	the register to perform the bitmod against.

Returns

zero if success, otherwise non-zero.

mcp2515_register_read()

int mcp2515_register_read	(	pi_mcp2515_t *	pi_mcp2515,
		uint8_t *	data,
		uint8_t	len,
		mcp2515_rgstr_t	rgstr )

Read a value from a specified register.

Parameters

pi_mcp2515	the piMCP2515 handle.
data	the destination to copy the read data to.
len	the length of the destination buffer.
rgstr	the register to read.

Returns

zero if success, otherwise non-zero.

mcp2515_register_write()

int mcp2515_register_write	(	pi_mcp2515_t *	pi_mcp2515,
		uint8_t	values[],
		uint8_t	len,
		mcp2515_rgstr_t	rgstr )

Write a value to the specified register.

Parameters

pi_mcp2515	the piMCP2515 handle.
values	the data to write to the register.
len	the length of the data to write.
rgstr	the register to write to.

Returns

zero if success, otherwise non-zero.