Add support for Bus Pirate as a JTAG adapter.
This includes a driver and matching config file. This support needs to be enabled through the initial "configure" (use "--enable-buspirate"). Signed-off-by: Michal Demin <michaldemin@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
Michal Demin
David Brownell
parent
591e0bbab9
commit
24e1e3dd26
1
NEWS
1
NEWS
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@ -4,6 +4,7 @@ history for details about what changed, including bugfixes
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and other issues not mentioned here.
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JTAG Layer:
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New driver for "Bus Pirate"
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Boundary Scan:
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11
configure.in
11
configure.in
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@ -474,6 +474,10 @@ AC_ARG_ENABLE(arm-jtag-ew,
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AS_HELP_STRING([--enable-arm-jtag-ew], [Enable building support for the Olimex ARM-JTAG-EW Programmer]),
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[build_armjtagew=$enableval], [build_armjtagew=no])
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AC_ARG_ENABLE(buspirate,
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AS_HELP_STRING([--enable-buspirate], [Enable building support for the Buspirate]),
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[build_buspirate=$enableval], [build_buspirate=no])
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AC_ARG_ENABLE(minidriver_dummy,
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AS_HELP_STRING([--enable-minidriver-dummy], [Enable the dummy minidriver.]),
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[build_minidriver_dummy=$enableval], [build_minidriver_dummy=no])
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@ -741,6 +745,12 @@ else
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AC_DEFINE(BUILD_ARMJTAGEW, 0, [0 if you don't want the ARM-JTAG-EW JTAG driver.])
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fi
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if test $build_buspirate = yes; then
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AC_DEFINE(BUILD_BUSPIRATE, 1, [1 if you want the Buspirate JTAG driver.])
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else
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AC_DEFINE(BUILD_BUSPIRATE, 0, [0 if you don't want the Buspirate JTAG driver.])
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fi
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#-- Deal with MingW/Cygwin FTD2XX issues
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if test $is_win32 = yes; then
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@ -1035,6 +1045,7 @@ AM_CONDITIONAL(JLINK, test $build_jlink = yes)
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AM_CONDITIONAL(VSLLINK, test $build_vsllink = yes)
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AM_CONDITIONAL(RLINK, test $build_rlink = yes)
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AM_CONDITIONAL(ARMJTAGEW, test $build_armjtagew = yes)
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AM_CONDITIONAL(BUSPIRATE, test $build_buspirate = yes)
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AM_CONDITIONAL(USB, test $build_usb = yes)
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AM_CONDITIONAL(IS_CYGWIN, test $is_cygwin = yes)
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AM_CONDITIONAL(IS_MINGW, test $is_mingw = yes)
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@ -432,6 +432,9 @@ Raisonance has an adapter called @b{RLink}. It exists in a stripped-down form o
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@item @b{ARM-JTAG-EW}
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@* Link: @url{http://www.olimex.com/dev/arm-jtag-ew.html}
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@item @b{Buspirate}
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@* Link: @url{http://dangerousprototypes.com/bus-pirate-manual/}
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@end itemize
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@section IBM PC Parallel Printer Port Based
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@ -64,6 +64,9 @@ endif
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if ARMJTAGEW
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DRIVERFILES += arm-jtag-ew.c
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endif
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if BUSPIRATE
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DRIVERFILES += buspirate.c
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endif
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noinst_HEADERS = \
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bitbang.h \
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@ -0,0 +1,969 @@
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/***************************************************************************
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* Copyright (C) 2010 by Michal Demin *
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* based on usbprog.c and arm-jtag-ew.c *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <jtag/interface.h>
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#include <jtag/commands.h>
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#include <termios.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#undef DEBUG_SERIAL
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/*#define DEBUG_SERIAL */
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static int buspirate_execute_queue(void);
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static int buspirate_speed(int speed);
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static int buspirate_khz(int khz, int *jtag_speed);
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static int buspirate_init(void);
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static int buspirate_quit(void);
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static void buspirate_end_state(tap_state_t state);
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static void buspirate_state_move(void);
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static void buspirate_path_move(int num_states, tap_state_t *path);
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static void buspirate_runtest(int num_cycles);
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static void buspirate_scan(bool ir_scan, enum scan_type type,
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uint8_t *buffer, int scan_size, struct scan_command *command);
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#define CMD_UNKOWN 0x00
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#define CMD_PORT_MODE 0x01
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#define CMD_FEATURE 0x02
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#define CMD_READ_ADCS 0x03
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/*#define CMD_TAP_SHIFT 0x04 // old protocol */
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#define CMD_TAP_SHIFT 0x05
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#define CMD_ENTER_OOCD 0x06
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#define CMD_UART_SPEED 0x07
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#define CMD_JTAG_SPEED 0x08
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enum {
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MODE_HIZ = 0,
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MODE_JTAG = 1, /* push-pull outputs */
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MODE_JTAG_OD = 2, /* open-drain outputs */
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};
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enum {
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FEATURE_LED = 0x01,
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FEATURE_VREG = 0x02,
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FEATURE_TRST = 0x04,
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FEATURE_SRST = 0x08,
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FEATURE_PULLUP = 0x10
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};
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enum {
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ACTION_DISABLE = 0,
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ACTION_ENABLE = 1
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};
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enum {
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SERIAL_NORMAL = 0,
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SERIAL_FAST = 1
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};
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static int buspirate_fd = -1;
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static int buspirate_pinmode = MODE_JTAG_OD;
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static int buspirate_baudrate = SERIAL_NORMAL;
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static int buspirate_vreg;
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static int buspirate_pullup;
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static char *buspirate_port;
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/* TAP interface */
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static void buspirate_tap_init(void);
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static int buspirate_tap_execute(void);
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static void buspirate_tap_append(int tms, int tdi);
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static void buspirate_tap_append_scan(int length, uint8_t *buffer,
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struct scan_command *command);
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static void buspirate_tap_make_space(int scan, int bits);
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static void buspirate_reset(int trst, int srst);
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/* low level interface */
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static void buspirate_jtag_reset(int);
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static void buspirate_jtag_enable(int);
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static unsigned char buspirate_jtag_command(int, char *, int);
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static void buspirate_jtag_set_speed(int, char);
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static void buspirate_jtag_set_mode(int, char);
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static void buspirate_jtag_set_feature(int, char, char);
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static void buspirate_jtag_get_adcs(int);
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/* low level HW communication interface */
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static int buspirate_serial_setspeed(int fd, speed_t speed);
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static int buspirate_serial_write(int fd, char *buf, int size);
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static int buspirate_serial_read(int fd, char *buf, int size);
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static void buspirate_print_buffer(char *buf, int size);
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static int buspirate_speed(int speed)
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{
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/* TODO */
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LOG_INFO("Want to set speed to %dkHz, but not implemented yet", speed);
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return ERROR_OK;
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}
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static int buspirate_khz(int khz, int *jtag_speed)
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{
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*jtag_speed = khz;
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return ERROR_OK;
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}
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static int buspirate_execute_queue(void)
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{
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/* currently processed command */
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struct jtag_command *cmd = jtag_command_queue;
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int scan_size;
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enum scan_type type;
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uint8_t *buffer;
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while (cmd) {
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switch (cmd->type) {
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case JTAG_RUNTEST:
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DEBUG_JTAG_IO("runtest %i cycles, end in %s",
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cmd->cmd.runtest->num_cycles,
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tap_state_name(cmd->cmd.runtest
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->end_state));
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buspirate_end_state(cmd->cmd.runtest
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->end_state);
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buspirate_runtest(cmd->cmd.runtest
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->num_cycles);
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break;
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case JTAG_STATEMOVE:
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DEBUG_JTAG_IO("statemove end in %s",
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tap_state_name(cmd->cmd.statemove
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->end_state));
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buspirate_end_state(cmd->cmd.statemove
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->end_state);
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buspirate_state_move();
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break;
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case JTAG_PATHMOVE:
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DEBUG_JTAG_IO("pathmove: %i states, end in %s",
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cmd->cmd.pathmove->num_states,
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tap_state_name(cmd->cmd.pathmove
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->path[cmd->cmd.pathmove
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->num_states - 1]));
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buspirate_path_move(cmd->cmd.pathmove
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->num_states,
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cmd->cmd.pathmove->path);
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break;
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case JTAG_SCAN:
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DEBUG_JTAG_IO("scan end in %s",
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tap_state_name(cmd->cmd.scan
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->end_state));
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buspirate_end_state(cmd->cmd.scan
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->end_state);
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scan_size = jtag_build_buffer(cmd->cmd.scan,
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&buffer);
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type = jtag_scan_type(cmd->cmd.scan);
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buspirate_scan(cmd->cmd.scan->ir_scan, type,
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buffer, scan_size, cmd->cmd.scan);
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break;
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case JTAG_RESET:
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DEBUG_JTAG_IO("reset trst: %i srst %i",
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cmd->cmd.reset->trst, cmd->cmd.reset->srst);
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/* flush buffers, so we can reset */
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buspirate_tap_execute();
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if (cmd->cmd.reset->trst == 1)
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tap_set_state(TAP_RESET);
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buspirate_reset(cmd->cmd.reset->trst,
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cmd->cmd.reset->srst);
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break;
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case JTAG_SLEEP:
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DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
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buspirate_tap_execute();
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jtag_sleep(cmd->cmd.sleep->us);
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break;
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default:
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LOG_ERROR("BUG: unknown JTAG command type encountered");
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exit(-1);
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}
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cmd = cmd->next;
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}
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return buspirate_tap_execute();
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}
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static int buspirate_init(void)
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{
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if (buspirate_port == NULL) {
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LOG_ERROR("You need to specify port !");
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return ERROR_JTAG_INIT_FAILED;
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}
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buspirate_fd = open(buspirate_port, O_RDWR | O_NOCTTY);
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if (buspirate_fd == -1) {
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LOG_ERROR("Could not open serial port.");
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return ERROR_JTAG_INIT_FAILED;
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}
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buspirate_serial_setspeed(buspirate_fd, B115200);
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buspirate_jtag_enable(buspirate_fd);
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if (buspirate_baudrate != SERIAL_NORMAL)
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buspirate_jtag_set_speed(buspirate_fd, SERIAL_FAST);
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LOG_INFO("Buspirate Interface ready!");
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buspirate_tap_init();
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buspirate_jtag_set_mode(buspirate_fd, buspirate_pinmode);
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buspirate_jtag_set_feature(buspirate_fd, FEATURE_VREG,
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(buspirate_vreg == 1) ? ACTION_ENABLE : ACTION_DISABLE);
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buspirate_jtag_set_feature(buspirate_fd, FEATURE_PULLUP,
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(buspirate_pullup == 1) ? ACTION_ENABLE : ACTION_DISABLE);
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buspirate_reset(0, 0);
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return ERROR_OK;
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}
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static int buspirate_quit(void)
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{
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LOG_INFO("Shuting down buspirate ");
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buspirate_jtag_set_mode(buspirate_fd, MODE_HIZ);
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buspirate_jtag_set_speed(buspirate_fd, SERIAL_NORMAL);
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buspirate_jtag_reset(buspirate_fd);
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if (buspirate_port) {
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free(buspirate_port);
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buspirate_port = NULL;
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}
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return ERROR_OK;
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}
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/* openocd command interface */
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COMMAND_HANDLER(buspirate_handle_adc_command)
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{
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if (CMD_ARGC != 0) {
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LOG_ERROR("usage: buspirate_adc");
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return ERROR_OK;
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}
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if (buspirate_fd == -1)
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return ERROR_OK;
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/* send the command */
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buspirate_jtag_get_adcs(buspirate_fd);
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return ERROR_OK;
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}
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COMMAND_HANDLER(buspirate_handle_vreg_command)
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{
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if (CMD_ARGC != 1) {
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LOG_ERROR("usage: buspirate_vreg <1|0>");
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return ERROR_OK;
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}
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if (atoi(CMD_ARGV[0]) == 1)
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buspirate_vreg = 1;
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else
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buspirate_vreg = 0;
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return ERROR_OK;
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}
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COMMAND_HANDLER(buspirate_handle_pullup_command)
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{
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if (CMD_ARGC != 1) {
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LOG_ERROR("usage: buspirate_pullup <1|0>");
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return ERROR_OK;
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}
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if (atoi(CMD_ARGV[0]) == 1)
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buspirate_pullup = 1;
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else
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buspirate_pullup = 0;
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return ERROR_OK;
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}
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COMMAND_HANDLER(buspirate_handle_led_command)
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{
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if (CMD_ARGC != 1) {
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LOG_ERROR("usage: buspirate_led <1|0>");
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return ERROR_OK;
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}
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if (atoi(CMD_ARGV[0]) == 1) {
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/* enable led */
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buspirate_jtag_set_feature(buspirate_fd, FEATURE_LED,
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ACTION_ENABLE);
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} else {
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/* disable led */
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buspirate_jtag_set_feature(buspirate_fd, FEATURE_LED,
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ACTION_DISABLE);
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}
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return ERROR_OK;
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}
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COMMAND_HANDLER(buspirate_handle_mode_command)
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{
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if (CMD_ARGC != 1) {
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LOG_ERROR("usage: buspirate_mode <normal|open-drain>");
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return ERROR_OK;
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}
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if (CMD_ARGV[0][0] == 'n')
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buspirate_pinmode = MODE_JTAG;
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else if (CMD_ARGV[0][0] == 'o')
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buspirate_pinmode = MODE_JTAG_OD;
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else
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LOG_ERROR("usage: buspirate_mode <normal|open-drain>");
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return ERROR_OK;
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}
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COMMAND_HANDLER(buspirate_handle_speed_command)
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{
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if (CMD_ARGC != 1) {
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LOG_ERROR("usage: buspirate_speed <normal|fast>");
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return ERROR_OK;
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}
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if (CMD_ARGV[0][0] == 'n')
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buspirate_baudrate = SERIAL_NORMAL;
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else if (CMD_ARGV[0][0] == 'f')
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buspirate_baudrate = SERIAL_FAST;
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else
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LOG_ERROR("usage: buspirate_speed <normal|fast>");
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return ERROR_OK;
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}
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COMMAND_HANDLER(buspirate_handle_port_command)
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{
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if (CMD_ARGC != 1) {
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LOG_ERROR("usage: buspirate_port /dev/ttyUSB0");
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return ERROR_OK;
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}
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if (buspirate_port == 0)
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buspirate_port = strdup(CMD_ARGV[0]);
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return ERROR_OK;
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}
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static const struct command_registration buspirate_command_handlers[] = {
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{
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.name = "buspirate_adc",
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.handler = &buspirate_handle_adc_command,
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.mode = COMMAND_EXEC,
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.help = "reads voltages on adc pins",
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},
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{
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.name = "buspirate_vreg",
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.handler = &buspirate_handle_vreg_command,
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.mode = COMMAND_CONFIG,
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.help = "changes the state of voltage regulators",
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},
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{
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.name = "buspirate_pullup",
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.handler = &buspirate_handle_pullup_command,
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.mode = COMMAND_CONFIG,
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.help = "changes the state of pullup",
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},
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{
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.name = "buspirate_led",
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.handler = &buspirate_handle_led_command,
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.mode = COMMAND_EXEC,
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.help = "changes the state of led",
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},
|
||||
{
|
||||
.name = "buspirate_speed",
|
||||
.handler = &buspirate_handle_speed_command,
|
||||
.mode = COMMAND_CONFIG,
|
||||
.help = "speed of the interface",
|
||||
},
|
||||
{
|
||||
.name = "buspirate_mode",
|
||||
.handler = &buspirate_handle_mode_command,
|
||||
.mode = COMMAND_CONFIG,
|
||||
.help = "pin mode of the interface",
|
||||
},
|
||||
{
|
||||
.name = "buspirate_port",
|
||||
.handler = &buspirate_handle_port_command,
|
||||
.mode = COMMAND_CONFIG,
|
||||
.help = "name of the serial port to open",
|
||||
},
|
||||
COMMAND_REGISTRATION_DONE
|
||||
};
|
||||
|
||||
struct jtag_interface buspirate_interface = {
|
||||
.name = "buspirate",
|
||||
.execute_queue = buspirate_execute_queue,
|
||||
.speed = buspirate_speed,
|
||||
.khz = buspirate_khz,
|
||||
.commands = buspirate_command_handlers,
|
||||
.init = buspirate_init,
|
||||
.quit = buspirate_quit
|
||||
};
|
||||
|
||||
/*************** jtag execute commands **********************/
|
||||
static void buspirate_end_state(tap_state_t state)
|
||||
{
|
||||
if (tap_is_state_stable(state))
|
||||
tap_set_end_state(state);
|
||||
else {
|
||||
LOG_ERROR("BUG: %i is not a valid end state", state);
|
||||
exit(-1);
|
||||
}
|
||||
}
|
||||
|
||||
static void buspirate_state_move(void)
|
||||
{
|
||||
int i = 0, tms = 0;
|
||||
uint8_t tms_scan = tap_get_tms_path(tap_get_state(),
|
||||
tap_get_end_state());
|
||||
int tms_count = tap_get_tms_path_len(tap_get_state(),
|
||||
tap_get_end_state());
|
||||
|
||||
for (i = 0; i < tms_count; i++) {
|
||||
tms = (tms_scan >> i) & 1;
|
||||
buspirate_tap_append(tms, 0);
|
||||
}
|
||||
|
||||
tap_set_state(tap_get_end_state());
|
||||
}
|
||||
|
||||
static void buspirate_path_move(int num_states, tap_state_t *path)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < num_states; i++) {
|
||||
if (tap_state_transition(tap_get_state(), false) == path[i]) {
|
||||
buspirate_tap_append(0, 0);
|
||||
} else if (tap_state_transition(tap_get_state(), true)
|
||||
== path[i]) {
|
||||
buspirate_tap_append(1, 0);
|
||||
} else {
|
||||
LOG_ERROR("BUG: %s -> %s isn't a valid "
|
||||
"TAP transition",
|
||||
tap_state_name(tap_get_state()),
|
||||
tap_state_name(path[i]));
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
tap_set_state(path[i]);
|
||||
}
|
||||
|
||||
tap_set_end_state(tap_get_state());
|
||||
}
|
||||
|
||||
static void buspirate_runtest(int num_cycles)
|
||||
{
|
||||
int i;
|
||||
|
||||
tap_state_t saved_end_state = tap_get_end_state();
|
||||
|
||||
/* only do a state_move when we're not already in IDLE */
|
||||
if (tap_get_state() != TAP_IDLE) {
|
||||
buspirate_end_state(TAP_IDLE);
|
||||
buspirate_state_move();
|
||||
}
|
||||
|
||||
for (i = 0; i < num_cycles; i++)
|
||||
buspirate_tap_append(0, 0);
|
||||
|
||||
DEBUG_JTAG_IO("runtest: cur_state %s end_state %s",
|
||||
tap_state_name(tap_get_state()),
|
||||
tap_state_name(tap_get_end_state()));
|
||||
|
||||
/* finish in end_state */
|
||||
buspirate_end_state(saved_end_state);
|
||||
if (tap_get_state() != tap_get_end_state())
|
||||
buspirate_state_move();
|
||||
}
|
||||
|
||||
static void buspirate_scan(bool ir_scan, enum scan_type type,
|
||||
uint8_t *buffer, int scan_size, struct scan_command *command)
|
||||
{
|
||||
tap_state_t saved_end_state;
|
||||
|
||||
buspirate_tap_make_space(1, scan_size+8);
|
||||
/* is 8 correct ? (2 moves = 16) */
|
||||
|
||||
saved_end_state = tap_get_end_state();
|
||||
|
||||
buspirate_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
|
||||
buspirate_state_move();
|
||||
|
||||
buspirate_tap_append_scan(scan_size, buffer, command);
|
||||
|
||||
/* move to PAUSE */
|
||||
buspirate_tap_append(0, 0);
|
||||
|
||||
/* restore the saved state */
|
||||
buspirate_end_state(saved_end_state);
|
||||
tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
|
||||
|
||||
if (tap_get_state() != tap_get_end_state())
|
||||
buspirate_state_move();
|
||||
}
|
||||
|
||||
|
||||
/************************* TAP related stuff **********/
|
||||
|
||||
#define BUSPIRATE_BUFFER_SIZE 1024
|
||||
#define BUSPIRATE_MAX_PENDING_SCANS 32
|
||||
|
||||
static char tms_chain[BUSPIRATE_BUFFER_SIZE]; /* send */
|
||||
static char tdi_chain[BUSPIRATE_BUFFER_SIZE]; /* send */
|
||||
static int tap_chain_index;
|
||||
|
||||
struct pending_scan_result /* this was stolen from arm-jtag-ew */
|
||||
{
|
||||
int first; /* First bit position in tdo_buffer to read */
|
||||
int length; /* Number of bits to read */
|
||||
struct scan_command *command; /* Corresponding scan command */
|
||||
uint8_t *buffer;
|
||||
};
|
||||
|
||||
static struct pending_scan_result
|
||||
tap_pending_scans[BUSPIRATE_MAX_PENDING_SCANS];
|
||||
static int tap_pending_scans_num;
|
||||
|
||||
static void buspirate_tap_init(void)
|
||||
{
|
||||
tap_chain_index = 0;
|
||||
tap_pending_scans_num = 0;
|
||||
}
|
||||
|
||||
static int buspirate_tap_execute(void)
|
||||
{
|
||||
char tmp[4096];
|
||||
uint8_t *in_buf;
|
||||
int i;
|
||||
int fill_index = 0;
|
||||
int ret;
|
||||
int bytes_to_send;
|
||||
|
||||
if (tap_chain_index <= 0)
|
||||
return ERROR_OK;
|
||||
|
||||
LOG_DEBUG("executing tap num bits = %i scans = %i",
|
||||
tap_chain_index, tap_pending_scans_num);
|
||||
|
||||
bytes_to_send = (tap_chain_index+7) / 8;
|
||||
|
||||
tmp[0] = CMD_TAP_SHIFT; /* this command expects number of bits */
|
||||
tmp[1] = (char)(tap_chain_index >> 8); /* high */
|
||||
tmp[2] = (char)(tap_chain_index); /* low */
|
||||
|
||||
fill_index = 3;
|
||||
for (i = 0; i < bytes_to_send; i++) {
|
||||
tmp[fill_index] = tdi_chain[i];
|
||||
fill_index++;
|
||||
tmp[fill_index] = tms_chain[i];
|
||||
fill_index++;
|
||||
}
|
||||
|
||||
ret = buspirate_serial_write(buspirate_fd, tmp, 3 + bytes_to_send*2);
|
||||
if (ret != bytes_to_send*2+3) {
|
||||
LOG_ERROR("error writing :(");
|
||||
return ERROR_JTAG_DEVICE_ERROR;
|
||||
}
|
||||
|
||||
ret = buspirate_serial_read(buspirate_fd, tmp, bytes_to_send + 3);
|
||||
in_buf = (uint8_t *)(&tmp[3]);
|
||||
|
||||
/* parse the scans */
|
||||
for (i = 0; i < tap_pending_scans_num; i++) {
|
||||
uint8_t *buffer = tap_pending_scans[i].buffer;
|
||||
int length = tap_pending_scans[i].length;
|
||||
int first = tap_pending_scans[i].first;
|
||||
struct scan_command *command = tap_pending_scans[i].command;
|
||||
|
||||
/* copy bits from buffer */
|
||||
buf_set_buf(in_buf, first, buffer, 0, length);
|
||||
|
||||
/* return buffer to higher level */
|
||||
if (jtag_read_buffer(buffer, command) != ERROR_OK) {
|
||||
buspirate_tap_init();
|
||||
return ERROR_JTAG_QUEUE_FAILED;
|
||||
}
|
||||
|
||||
free(buffer);
|
||||
}
|
||||
tap_pending_scans_num = 0;
|
||||
tap_chain_index = 0;
|
||||
return ERROR_OK;
|
||||
}
|
||||
|
||||
static void buspirate_tap_make_space(int scans, int bits)
|
||||
{
|
||||
int have_scans = BUSPIRATE_MAX_PENDING_SCANS - tap_pending_scans_num;
|
||||
int have_bits = BUSPIRATE_BUFFER_SIZE * 8 - tap_chain_index;
|
||||
|
||||
if ((have_scans < scans) || (have_bits < bits))
|
||||
buspirate_tap_execute();
|
||||
}
|
||||
|
||||
static void buspirate_tap_append(int tms, int tdi)
|
||||
{
|
||||
int index;
|
||||
|
||||
buspirate_tap_make_space(0, 1);
|
||||
index = tap_chain_index / 8;
|
||||
|
||||
if (index < BUSPIRATE_BUFFER_SIZE) {
|
||||
int bit_index = tap_chain_index % 8;
|
||||
uint8_t bit = 1 << bit_index;
|
||||
|
||||
if (tms)
|
||||
tms_chain[index] |= bit;
|
||||
else
|
||||
tms_chain[index] &= ~bit;
|
||||
|
||||
if (tdi)
|
||||
tdi_chain[index] |= bit;
|
||||
else
|
||||
tdi_chain[index] &= ~bit;
|
||||
|
||||
tap_chain_index++;
|
||||
} else
|
||||
LOG_ERROR("tap_chain overflow, Bad things will happen");
|
||||
|
||||
}
|
||||
|
||||
static void buspirate_tap_append_scan(int length, uint8_t *buffer,
|
||||
struct scan_command *command)
|
||||
{
|
||||
int i;
|
||||
tap_pending_scans[tap_pending_scans_num].length = length;
|
||||
tap_pending_scans[tap_pending_scans_num].buffer = buffer;
|
||||
tap_pending_scans[tap_pending_scans_num].command = command;
|
||||
tap_pending_scans[tap_pending_scans_num].first = tap_chain_index;
|
||||
|
||||
for (i = 0; i < length; i++) {
|
||||
int tms = (i < length-1 ? 0 : 1);
|
||||
int tdi = (buffer[i/8] >> (i%8)) & 1;
|
||||
buspirate_tap_append(tms, tdi);
|
||||
}
|
||||
tap_pending_scans_num++;
|
||||
}
|
||||
|
||||
/*************** jtag wrapper functions *********************/
|
||||
|
||||
/* (1) assert or (0) deassert reset lines */
|
||||
static void buspirate_reset(int trst, int srst)
|
||||
{
|
||||
LOG_DEBUG("trst: %i, srst: %i", trst, srst);
|
||||
|
||||
if (trst)
|
||||
buspirate_jtag_set_feature(buspirate_fd,
|
||||
FEATURE_TRST, ACTION_DISABLE);
|
||||
else
|
||||
buspirate_jtag_set_feature(buspirate_fd,
|
||||
FEATURE_TRST, ACTION_ENABLE);
|
||||
|
||||
if (srst)
|
||||
buspirate_jtag_set_feature(buspirate_fd,
|
||||
FEATURE_SRST, ACTION_DISABLE);
|
||||
else
|
||||
buspirate_jtag_set_feature(buspirate_fd,
|
||||
FEATURE_SRST, ACTION_ENABLE);
|
||||
}
|
||||
|
||||
/*************** jtag lowlevel functions ********************/
|
||||
static void buspirate_jtag_enable(int fd)
|
||||
{
|
||||
int ret;
|
||||
char tmp[21] = { [0 ... 20] = 0x00 };
|
||||
int done = 0;
|
||||
int cmd_sent = 0;
|
||||
|
||||
LOG_DEBUG("Entering binary mode");
|
||||
buspirate_serial_write(fd, tmp, 20);
|
||||
usleep(10000);
|
||||
|
||||
/* reads 1 to n "BBIO1"s and one "OCD1" */
|
||||
while (!done) {
|
||||
ret = buspirate_serial_read(fd, tmp, 4);
|
||||
if (ret != 4) {
|
||||
LOG_ERROR("Buspirate did not respond :"
|
||||
"( restart everything");
|
||||
exit(-1);
|
||||
}
|
||||
LOG_DEBUG("TUI");
|
||||
if (strncmp(tmp, "BBIO", 4) == 0) {
|
||||
ret = buspirate_serial_read(fd, tmp, 1);
|
||||
if (ret != 1) {
|
||||
LOG_ERROR("Buspirate did not respond well :"
|
||||
"( restart everything");
|
||||
exit(-1);
|
||||
}
|
||||
if (tmp[0] != '1') {
|
||||
LOG_ERROR("Unsupported binary protocol ");
|
||||
exit(-1);
|
||||
}
|
||||
if (cmd_sent == 0) {
|
||||
cmd_sent = 1;
|
||||
tmp[0] = CMD_ENTER_OOCD;
|
||||
ret = buspirate_serial_write(fd, tmp, 1);
|
||||
}
|
||||
} else if (strncmp(tmp, "OCD1", 4) == 0)
|
||||
done = 1;
|
||||
else {
|
||||
LOG_ERROR("Buspirate did not respond :"
|
||||
"( restart everything");
|
||||
exit(-1);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
static void buspirate_jtag_reset(int fd)
|
||||
{
|
||||
int ret;
|
||||
char tmp[5];
|
||||
|
||||
tmp[0] = 0x00; /* exit OCD1 mode */
|
||||
buspirate_serial_write(fd, tmp, 1);
|
||||
usleep(10000);
|
||||
ret = buspirate_serial_read(fd, tmp, 5);
|
||||
if (strncmp(tmp, "BBIO1", 5) == 0) {
|
||||
tmp[0] = 0x0F; /* reset BP */
|
||||
buspirate_serial_write(fd, tmp, 1);
|
||||
} else
|
||||
LOG_ERROR("Bad reply :( Please restart manually");
|
||||
}
|
||||
|
||||
static void buspirate_jtag_set_speed(int fd, char speed)
|
||||
{
|
||||
int ret;
|
||||
char tmp[2];
|
||||
char ack[2];
|
||||
speed_t baudrate = B115200;
|
||||
|
||||
ack[0] = 0xAA;
|
||||
ack[1] = 0x55;
|
||||
|
||||
tmp[0] = CMD_UART_SPEED;
|
||||
tmp[1] = speed;
|
||||
buspirate_jtag_command(fd, tmp, 2);
|
||||
|
||||
/* here the adapter changes speed, we need follow */
|
||||
if (speed == SERIAL_FAST)
|
||||
baudrate = B1000000;
|
||||
|
||||
buspirate_serial_setspeed(fd, baudrate);
|
||||
|
||||
buspirate_serial_write(fd, ack, 2);
|
||||
ret = buspirate_serial_read(fd, tmp, 2);
|
||||
if (ret != 2) {
|
||||
LOG_ERROR("Buspirate did not respond :"
|
||||
"( restart everything");
|
||||
exit(-1);
|
||||
}
|
||||
if ((tmp[0] != CMD_UART_SPEED) || (tmp[1] != speed)) {
|
||||
LOG_ERROR("Buspirate didn't reply as expected :"
|
||||
"( restart everything");
|
||||
exit(-1);
|
||||
}
|
||||
LOG_INFO("Buspirate switched to %s mode",
|
||||
(speed == SERIAL_NORMAL) ? "normal" : "FAST");
|
||||
}
|
||||
|
||||
|
||||
static void buspirate_jtag_set_mode(int fd, char mode)
|
||||
{
|
||||
char tmp[2];
|
||||
tmp[0] = CMD_PORT_MODE;
|
||||
tmp[1] = mode;
|
||||
buspirate_jtag_command(fd, tmp, 2);
|
||||
}
|
||||
|
||||
static void buspirate_jtag_set_feature(int fd, char feat, char action)
|
||||
{
|
||||
char tmp[3];
|
||||
tmp[0] = CMD_FEATURE;
|
||||
tmp[1] = feat; /* what */
|
||||
tmp[2] = action; /* action */
|
||||
buspirate_jtag_command(fd, tmp, 3);
|
||||
}
|
||||
|
||||
static void buspirate_jtag_get_adcs(int fd)
|
||||
{
|
||||
uint8_t tmp[10];
|
||||
uint16_t a, b, c, d;
|
||||
tmp[0] = CMD_READ_ADCS;
|
||||
buspirate_jtag_command(fd, (char *)tmp, 1);
|
||||
a = tmp[2] << 8 | tmp[3];
|
||||
b = tmp[4] << 8 | tmp[5];
|
||||
c = tmp[6] << 8 | tmp[7];
|
||||
d = tmp[8] << 8 | tmp[9];
|
||||
|
||||
LOG_INFO("ADC: ADC_Pin = %.02f VPullup = %.02f V33 = %.02f "
|
||||
"V50 = %.02f",
|
||||
((float)a)/155.1515, ((float)b)/155.1515,
|
||||
((float)c)/155.1515, ((float)d)/155.1515);
|
||||
}
|
||||
|
||||
static unsigned char buspirate_jtag_command(int buspirate_fd,
|
||||
char *cmd, int cmdlen)
|
||||
{
|
||||
int res;
|
||||
int len = 0;
|
||||
|
||||
res = buspirate_serial_write(buspirate_fd, cmd, cmdlen);
|
||||
|
||||
if ((cmd[0] == CMD_UART_SPEED)
|
||||
|| (cmd[0] == CMD_PORT_MODE)
|
||||
|| (cmd[0] == CMD_FEATURE)
|
||||
|| (cmd[0] == CMD_JTAG_SPEED))
|
||||
return 1;
|
||||
|
||||
if (res == cmdlen) {
|
||||
switch (cmd[0]) {
|
||||
case CMD_READ_ADCS:
|
||||
len = 10; /* 2*sizeof(char)+4*sizeof(uint16_t) */
|
||||
break;
|
||||
case CMD_TAP_SHIFT:
|
||||
len = cmdlen;
|
||||
break;
|
||||
default:
|
||||
LOG_INFO("Wrong !");
|
||||
}
|
||||
res = buspirate_serial_read(buspirate_fd, cmd, len);
|
||||
if (res > 0)
|
||||
return (unsigned char)cmd[1];
|
||||
else
|
||||
return -1;
|
||||
} else
|
||||
return -1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* low level serial port */
|
||||
/* TODO add support for WIN32 and others ! */
|
||||
static int buspirate_serial_setspeed(int fd, speed_t speed)
|
||||
{
|
||||
struct termios t_opt;
|
||||
|
||||
/* set the serial port parameters */
|
||||
fcntl(buspirate_fd, F_SETFL, 0);
|
||||
tcgetattr(buspirate_fd, &t_opt);
|
||||
cfsetispeed(&t_opt, speed);
|
||||
cfsetospeed(&t_opt, speed);
|
||||
t_opt.c_cflag |= (CLOCAL | CREAD);
|
||||
t_opt.c_cflag &= ~PARENB;
|
||||
t_opt.c_cflag &= ~CSTOPB;
|
||||
t_opt.c_cflag &= ~CSIZE;
|
||||
t_opt.c_cflag |= CS8;
|
||||
t_opt.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
|
||||
t_opt.c_iflag &= ~(IXON | IXOFF | IXANY);
|
||||
t_opt.c_oflag &= ~OPOST;
|
||||
t_opt.c_cc[VMIN] = 0;
|
||||
t_opt.c_cc[VTIME] = 10;
|
||||
tcflush(buspirate_fd, TCIFLUSH);
|
||||
tcsetattr(buspirate_fd, TCSANOW, &t_opt);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int buspirate_serial_write(int fd, char *buf, int size)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
ret = write(fd, buf, size);
|
||||
|
||||
LOG_DEBUG("size = %d ret = %d", size, ret);
|
||||
buspirate_print_buffer(buf, size);
|
||||
|
||||
if (ret != size)
|
||||
LOG_ERROR("Error sending data");
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int buspirate_serial_read(int fd, char *buf, int size)
|
||||
{
|
||||
int len = 0;
|
||||
int ret = 0;
|
||||
int timeout = 0;
|
||||
|
||||
while (len < size) {
|
||||
ret = read(fd, buf+len, size-len);
|
||||
if (ret == -1)
|
||||
return -1;
|
||||
|
||||
if (ret == 0) {
|
||||
timeout++;
|
||||
|
||||
if (timeout >= 10)
|
||||
break;
|
||||
|
||||
continue;
|
||||
}
|
||||
|
||||
len += ret;
|
||||
}
|
||||
|
||||
LOG_DEBUG("should have read = %d actual size = %d", size, len);
|
||||
buspirate_print_buffer(buf, len);
|
||||
|
||||
if (len != size)
|
||||
LOG_ERROR("Error sending data");
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
#define LINE_SIZE 81
|
||||
#define BYTES_PER_LINE 16
|
||||
static void buspirate_print_buffer(char *buf, int size)
|
||||
{
|
||||
char line[LINE_SIZE];
|
||||
char tmp[10];
|
||||
int offset = 0;
|
||||
|
||||
line[0] = 0;
|
||||
while (offset < size) {
|
||||
snprintf(tmp, 5, "%02x ", (uint8_t)buf[offset]);
|
||||
offset++;
|
||||
|
||||
strcat(line, tmp);
|
||||
|
||||
if (offset % BYTES_PER_LINE == 0) {
|
||||
LOG_DEBUG("%s", line);
|
||||
line[0] = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if (line[0] != 0) {
|
||||
LOG_DEBUG("%s", line);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -91,6 +91,9 @@ extern struct jtag_interface rlink_interface;
|
|||
#if BUILD_ARMJTAGEW == 1
|
||||
extern struct jtag_interface armjtagew_interface;
|
||||
#endif
|
||||
#if BUILD_BUSPIRATE == 1
|
||||
extern struct jtag_interface buspirate_interface;
|
||||
#endif
|
||||
#endif // standard drivers
|
||||
|
||||
/**
|
||||
|
|
@ -151,6 +154,9 @@ struct jtag_interface *jtag_interfaces[] = {
|
|||
#if BUILD_ARMJTAGEW == 1
|
||||
&armjtagew_interface,
|
||||
#endif
|
||||
#if BUILD_BUSPIRATE == 1
|
||||
&buspirate_interface,
|
||||
#endif
|
||||
#endif // standard drivers
|
||||
NULL,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -0,0 +1,26 @@
|
|||
#
|
||||
# Buspirate with OpenOCD support
|
||||
#
|
||||
# http://dangerousprototypes.com/bus-pirate-manual/
|
||||
#
|
||||
|
||||
interface buspirate
|
||||
|
||||
# you need to specify port on which BP lives
|
||||
#buspirate_port /dev/ttyUSB0
|
||||
|
||||
# communication speed setting
|
||||
buspirate_speed normal # or fast
|
||||
|
||||
# voltage regulator Enabled = 1 Disabled = 0
|
||||
#buspirate_vreg 0
|
||||
|
||||
# pin mode normal or open-drain
|
||||
#buspirate_mode normal
|
||||
|
||||
# pullup state Enabled = 1 Disabled = 0
|
||||
#buspirate_pullup 0
|
||||
|
||||
# this depends on the cable, you are safe with this option
|
||||
reset_config srst_only
|
||||
|
||||
Loading…
Reference in New Issue