bitbang.h

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
/***************************************************************************
 *   Copyright (C) 2005 by Dominic Rath                                    *
 *   Dominic.Rath@gmx.de                                                   *
 *                                                                         *
 *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
 *   oyvind.harboe@zylin.com                                               *
 ***************************************************************************/
 
#ifndef OPENOCD_JTAG_DRIVERS_BITBANG_H
#define OPENOCD_JTAG_DRIVERS_BITBANG_H
 
#include <jtag/swd.h>
 
typedef enum {
    BB_LOW,
    BB_HIGH,
    BB_ERROR
} bb_value_t;
 
struct bitbang_interface {
    bb_value_t (*read)(void);
 
    size_t buf_size;
 
    int (*sample)(void);
 
    bb_value_t (*read_sample)(void);
 
    int (*write)(int tck, int tms, int tdi);
 
    int (*blink)(int on);
 
    int (*swdio_read)(void);
 
    void (*swdio_drive)(bool on);
 
    int (*swd_write)(int swclk, int swdio);
};
 
extern const struct swd_driver bitbang_swd;
 
int bitbang_execute_queue(void);
 
extern struct bitbang_interface *bitbang_interface;
 
#endif /* OPENOCD_JTAG_DRIVERS_BITBANG_H */