interesting
/
riscv-openocd
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

bitbang: document bitbang callbacks 

Change-Id: I732c2eeb452f3ba8a2385d0e02fccbe86381812c
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5553
Tested-by: jenkins
This commit is contained in:
Antonio Borneo 2020-04-01 09:37:54 +02:00
parent fd9a7a8c8a
commit 1f5962203a
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/jtag/drivers/bitbang.h
View File

@ -38,21 +38,29 @@ typedef enum {
* sample requests together. Not waiting for a value to come back can greatly * sample requests together. Not waiting for a value to come back can greatly
* increase throughput. */ * increase throughput. */
struct bitbang_interface { struct bitbang_interface {
/** Sample TDO. */ /** Sample TDO and return the value. */
bb_value_t (*read)(void); bb_value_t (*read)(void);
/** The number of TDO samples that can be buffered up before the caller has /** The number of TDO samples that can be buffered up before the caller has
* to call read_sample. */ * to call read_sample. */
size_t buf_size; size_t buf_size;
/** Sample TDO and put the result in a buffer. */ /** Sample TDO and put the result in a buffer. */
int (*sample)(void); int (*sample)(void);
/** Return the next unread value from the buffer. */ /** Return the next unread value from the buffer. */
bb_value_t (*read_sample)(void); bb_value_t (*read_sample)(void);
/** Set TCK, TMS, and TDI to the given values. */ /** Set TCK, TMS, and TDI to the given values. */
int (*write)(int tck, int tms, int tdi); int (*write)(int tck, int tms, int tdi);
/** Blink led (optional). */
int (*blink)(int on); int (*blink)(int on);
/** Sample SWDIO and return the value. */
int (*swdio_read)(void); int (*swdio_read)(void);
/** Set direction of SWDIO. */
void (*swdio_drive)(bool on); void (*swdio_drive)(bool on);
}; };