avr_bitbang_t Struct Reference

SPI Module initialization and state structure. More...

#include <avr_bitbang.h>

Collaboration diagram for avr_bitbang_t:

Data Fields
avr_t *	avr
	avr we are attached to More...
uint8_t	enabled
	bit-bang enabled flag More...
uint8_t	clk_generate
	generate clock and write to clock pin (if available) -> master / slave mode More...
uint8_t	clk_pol
	clock polarity, base (inactive) value of clock More...
uint8_t	clk_phase
	clock phase / data sampling edge More...
uint32_t	clk_cycles
	cycles per clock period - must be multiple of 2! (used if clk_generate is enabled) More...
uint8_t	data_order
	data order / shift More...
uint8_t	buffer_size
	size of buffer in bits (1...32) More...
void *	callback_param
void(*	callback_bit_read )(uint8_t bit, void *param)
	anonymous parameter for callback functions More...
void(*	callback_bit_write )(uint8_t bit, void *param)
	callback function to notify about bit write More...
uint32_t(*	callback_transfer_finished )(uint32_t data, void *param)
	callback function to notify about a complete transfer (read received data and write new output data) More...
avr_iopin_t	p_clk
	clock pin (optional) More...
avr_iopin_t	p_in
	data in pin More...
avr_iopin_t	p_out
	data out pin More...
uint32_t	data
	data buffer More...
int8_t	clk_count
	internal clock edge count More...

Detailed Description

SPI Module initialization and state structure.

Field Documentation

avr_t* avr

avr we are attached to

uint8_t buffer_size

size of buffer in bits (1...32)

• 0: shift left
• 1: shift right

void(* callback_bit_read) (uint8_t bit, void *param)

anonymous parameter for callback functions

callback function to notify about bit read

void(* callback_bit_write) (uint8_t bit, void *param)

callback function to notify about bit write

void* callback_param

uint32_t(* callback_transfer_finished) (uint32_t data, void *param)

callback function to notify about a complete transfer (read received data and write new output data)

int8_t clk_count

internal clock edge count

• latest received bit the is lowest / most right one, bit number: 0
• next bit to be written is the highest one, bit number: (buffer_size-1)

uint32_t clk_cycles

cycles per clock period - must be multiple of 2! (used if clk_generate is enabled)

• 0: data are sampled at first clock edge
• 1: data are sampled at second clock edge

uint8_t clk_generate

generate clock and write to clock pin (if available) -> master / slave mode

uint8_t clk_phase

clock phase / data sampling edge

uint8_t clk_pol

clock polarity, base (inactive) value of clock

uint32_t data

data buffer

uint8_t data_order

data order / shift

uint8_t enabled

bit-bang enabled flag

avr_iopin_t p_clk

clock pin (optional)

avr_iopin_t p_in

data in pin

avr_iopin_t p_out

data out pin

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The documentation for this struct was generated from the following file:

• simavr/include/avr_bitbang.h