bitbang_interface Struct Reference

Low level callbacks (for bitbang). More...

Data Fields
int(*	blink )(int on)
	Blink led (optional). More...
size_t	buf_size
	The number of TDO samples that can be buffered up before the caller has to call read_sample. More...
bb_value_t(*	read )(void)
	Sample TDO and return the value. More...
bb_value_t(*	read_sample )(void)
	Return the next unread value from the buffer. More...
int(*	sample )(void)
	Sample TDO and put the result in a buffer. More...
int(*	swd_write )(int swclk, int swdio)
	Set SWCLK and SWDIO to the given value. More...
void(*	swdio_drive )(bool on)
	Set direction of SWDIO. More...
int(*	swdio_read )(void)
	Sample SWDIO and return the value. More...
int(*	write )(int tck, int tms, int tdi)
	Set TCK, TMS, and TDI to the given values. More...

Detailed Description

Low level callbacks (for bitbang).

Either read(), or sample() and read_sample() must be implemented.

The sample functions allow an interface to batch a number of writes and sample requests together. Not waiting for a value to come back can greatly increase throughput.

Definition at line 29 of file bitbang.h.

Field Documentation

blink

int(* bitbang_interface::blink) (int on)

Blink led (optional).

Definition at line 47 of file bitbang.h.

Referenced by bitbang_execute_queue(), and bitbang_swd_exchange().

buf_size

size_t bitbang_interface::buf_size

The number of TDO samples that can be buffered up before the caller has to call read_sample.

Definition at line 35 of file bitbang.h.

Referenced by bitbang_scan().

read

bb_value_t(* bitbang_interface::read) (void)

Sample TDO and return the value.

Definition at line 31 of file bitbang.h.

Referenced by bitbang_scan().

read_sample

bb_value_t(* bitbang_interface::read_sample) (void)

Return the next unread value from the buffer.

Definition at line 41 of file bitbang.h.

Referenced by bitbang_scan().

sample

int(* bitbang_interface::sample) (void)

Sample TDO and put the result in a buffer.

Definition at line 38 of file bitbang.h.

Referenced by bitbang_scan().

swd_write

int(* bitbang_interface::swd_write) (int swclk, int swdio)

Set SWCLK and SWDIO to the given value.

Definition at line 56 of file bitbang.h.

Referenced by bcm2835gpio_init(), and bitbang_swd_exchange().

swdio_drive

void(* bitbang_interface::swdio_drive) (bool on)

Set direction of SWDIO.

Definition at line 53 of file bitbang.h.

Referenced by bitbang_swd_read_reg(), and bitbang_swd_write_reg().

swdio_read

int(* bitbang_interface::swdio_read) (void)

Sample SWDIO and return the value.

Definition at line 50 of file bitbang.h.

Referenced by bitbang_swd_exchange().

write

int(* bitbang_interface::write) (int tck, int tms, int tdi)

Set TCK, TMS, and TDI to the given values.

Definition at line 44 of file bitbang.h.

Referenced by bitbang_execute_tms(), bitbang_path_move(), bitbang_runtest(), bitbang_scan(), bitbang_stableclocks(), and bitbang_state_move().

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

• bitbang.h