int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int ft2232_handle_latency_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+
+/**
+ * Function ft2232_stableclocks
+ * will send out \a num_cycles on the TCK line while the TAP(s)
+ * are in a stable state. Calling code must ensure that current state is
+ * stable, that verification is not done in here.
+ * @param num_cycles is the count of clocks cycles to send.
+ * @return int - ERROR_OK or ERROR_JTAG_QUEUE_FAILED
+ */
+static int ft2232_stableclocks(int num_cycles, jtag_command_t *cmd);
+
+
char *ft2232_device_desc = NULL;
char *ft2232_serial = NULL;
char *ft2232_layout = NULL;
static struct ftdi_context ftdic;
#endif
+
+static jtag_command_t *first_unsent; /* next command that has to be sent */
+static int require_send;
+
static u8 *ft2232_buffer = NULL;
static int ft2232_buffer_size = 0;
static int ft2232_read_pointer = 0;
static int ft2232_expect_read = 0;
+
#define FT2232_BUFFER_SIZE 131072
#define BUFFER_ADD ft2232_buffer[ft2232_buffer_size++]
#define BUFFER_READ ft2232_buffer[ft2232_read_pointer++]
void ft2232_read_scan(enum scan_type type, u8* buffer, int scan_size)
{
- int num_bytes = ((scan_size + 7) / 8);
+ int num_bytes = (scan_size + 7) / 8;
int bits_left = scan_size;
int cur_byte = 0;
if (type == SCAN_IN) /* only from device to host */
{
/* complete bytes */
- predicted_size += (CEIL(num_bytes, 65536)) * 3;
+ predicted_size += CEIL(num_bytes, 65536) * 3;
/* remaining bits - 1 (up to 7) */
predicted_size += ((scan_size - 1) % 8) ? 2 : 0;
}
else /* host to device, or bidirectional */
{
/* complete bytes */
- predicted_size += num_bytes + (CEIL(num_bytes, 65536)) * 3;
+ predicted_size += num_bytes + CEIL(num_bytes, 65536) * 3;
/* remaining bits -1 (up to 7) */
predicted_size += ((scan_size - 1) % 8) ? 3 : 0;
}
int ft2232_execute_queue()
{
jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
- jtag_command_t *first_unsent = cmd; /* next command that has to be sent */
u8 *buffer;
int scan_size; /* size of IR or DR scan */
enum scan_type type;
int i;
int predicted_size = 0;
- int require_send = 0;
int retval;
+ first_unsent = cmd; /* next command that has to be sent */
+ require_send = 0;
+
/* return ERROR_OK, unless ft2232_send_and_recv reports a failed check
* that wasn't handled by a caller-provided error handler
*/
if (cmd->cmd.end_state->end_state != -1)
ft2232_end_state(cmd->cmd.end_state->end_state);
break;
+
case JTAG_RESET:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 3;
LOG_DEBUG("trst: %i, srst: %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
#endif
break;
+
case JTAG_RUNTEST:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 0;
}
require_send = 1;
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("runtest: %i, end in %i", cmd->cmd.runtest->num_cycles, end_state);
+ LOG_DEBUG("runtest: %i, end in %s", cmd->cmd.runtest->num_cycles, jtag_state_name(end_state));
#endif
break;
+
case JTAG_STATEMOVE:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 3;
cur_state = end_state;
require_send = 1;
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("statemove: %i", end_state);
+ LOG_DEBUG("statemove: %s", jtag_state_name(end_state));
#endif
break;
+
case JTAG_PATHMOVE:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 3 * CEIL(cmd->cmd.pathmove->num_states, 7);
ft2232_add_pathmove(cmd->cmd.pathmove);
require_send = 1;
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
+ LOG_DEBUG("pathmove: %i states, end in %s", cmd->cmd.pathmove->num_states,
+ jtag_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
#endif
break;
+
case JTAG_SCAN:
scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
type = jtag_scan_type(cmd->cmd.scan);
if (buffer)
free(buffer);
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("%s scan, %i bit, end in %i", (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size, end_state);
+ LOG_DEBUG("%s scan, %i bits, end in %s", (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
+ jtag_state_name(end_state));
#endif
break;
+
case JTAG_SLEEP:
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
first_unsent = cmd->next;
jtag_sleep(cmd->cmd.sleep->us);
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("sleep %i usec", cmd->cmd.sleep->us);
+ LOG_DEBUG("sleep %i usec while in %s", cmd->cmd.sleep->us, jtag_state_name(cur_state));
+#endif
+ break;
+
+ case JTAG_STABLECLOCKS:
+ /* "if (tap_move_map[cur_state] != -1)" is of no help when cur_state==TAP_IDLE */
+ switch(cur_state)
+ {
+ case TAP_DRSHIFT:
+ case TAP_IDLE:
+ case TAP_RESET:
+ case TAP_DRPAUSE:
+ case TAP_IRSHIFT:
+ case TAP_IRPAUSE:
+ break; /* above stable states are OK */
+ default:
+ LOG_ERROR( "jtag_add_clocks() was called with TAP in non-stable state \"%s\"",
+ jtag_state_name(cur_state) );
+ retval = ERROR_JTAG_QUEUE_FAILED;
+ }
+
+ if (ft2232_stableclocks(cmd->cmd.stableclocks->num_cycles, cmd) != ERROR_OK)
+ retval = ERROR_JTAG_QUEUE_FAILED;
+#ifdef _DEBUG_JTAG_IO_
+ LOG_DEBUG("clocks %i while in %s", cmd->cmd.stableclocks->num_cycles, jtag_state_name(cur_state));
#endif
break;
+
default:
LOG_ERROR("BUG: unknown JTAG command type encountered");
exit(-1);
return ERROR_OK;
}
+
+
+static int ft2232_stableclocks(int num_cycles, jtag_command_t *cmd)
+{
+ int retval = 0;
+
+ while (num_cycles > 0)
+ {
+ /* the command 0x4b, "Clock Data to TMS/CS Pin (no Read)" handles
+ * at most 7 bits per invocation. Here we invoke it potentially
+ * several times.
+ */
+ int bitcount_per_command = (num_cycles > 7) ? 7 : num_cycles;
+
+ if (ft2232_buffer_size + 3 >= FT2232_BUFFER_SIZE)
+ {
+ if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
+ retval = ERROR_JTAG_QUEUE_FAILED;
+
+ first_unsent = cmd;
+ }
+
+ /* command "Clock Data to TMS/CS Pin (no Read)" */
+ BUFFER_ADD = 0x4b;
+
+ /* scan 7 bit */
+ BUFFER_ADD = bitcount_per_command - 1;
+
+ /* TMS data bits are all zeros to stay in the current stable state */
+ BUFFER_ADD = 0x0;
+
+ require_send = 1;
+
+ num_cycles -= bitcount_per_command;
+ }
+
+ return retval;
+}
+
/***************************************************************************
- * Copyright (C) 2005 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * Copyright (C) 2007,2008 Øyvind Harboe *
- * oyvind.harboe@zylin.com *
- * *
- * Copyright (C) 2008 Peter Hettkamp *
- * peter.hettkamp@htp-tel.de *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ * Copyright (C) 2005 by Dominic Rath *
+ * Dominic.Rath@gmx.de *
+ * *
+ * Copyright (C) 2007,2008 Øyvind Harboe *
+ * oyvind.harboe@zylin.com *
+ * *
+ * Copyright (C) 2008 Peter Hettkamp *
+ * peter.hettkamp@htp-tel.de *
+ * *
+ * Copyright (C) 2009 SoftPLC Corporation. http://softplc.com *
+ * dick@softplc.com *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+
+
+/* The specification for SVF is available here:
+ * http://www.asset-intertech.com/support/svf.pdf
+ * Below, this document is refered to as the "SVF spec".
+ *
+ * The specification for XSVF is available here:
+ * http://www.xilinx.com/support/documentation/application_notes/xapp503.pdf
+ * Below, this document is refered to as the "XSVF spec".
+ */
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/time.h>
#include <time.h>
-#define XSTATE_MAX_PATH (12)
-int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+/* XSVF commands, from appendix B of xapp503.pdf */
+#define XCOMPLETE 0x00
+#define XTDOMASK 0x01
+#define XSIR 0x02
+#define XSDR 0x03
+#define XRUNTEST 0x04
+#define XREPEAT 0x07
+#define XSDRSIZE 0x08
+#define XSDRTDO 0x09
+#define XSETSDRMASKS 0x0A
+#define XSDRINC 0x0B
+#define XSDRB 0x0C
+#define XSDRC 0x0D
+#define XSDRE 0x0E
+#define XSDRTDOB 0x0F
+#define XSDRTDOC 0x10
+#define XSDRTDOE 0x11
+#define XSTATE 0x12
+#define XENDIR 0x13
+#define XENDDR 0x14
+#define XSIR2 0x15
+#define XCOMMENT 0x16
+#define XWAIT 0x17
-int xsvf_fd = 0;
+/* XWAITSTATE is not in the xilinx XSVF spec, but the svf2xsvf.py translator
+ * generates this. Arguably it is needed because the XSVF XRUNTEST command
+ * was ill conceived and does not directly flow out of the SVF RUNTEST command.
+ * This XWAITSTATE does map directly from the SVF RUNTEST command.
+ */
+#define XWAITSTATE 0x18
-u8 *dr_out_buf; /* from host to device (TDI) */
-u8 *dr_in_buf; /* from device to host (TDO) */
-u8 *dr_in_mask;
+/* Lattice has extended the SVF file format, and Dick Hollenbeck's python based
+ * SVF2XSVF converter supports these 3 additional XSVF opcodes, LCOUNT, LDELAY, LSDR.
+ * Here is an example of usage of the 3 lattice opcode extensions:
-int xsdrsize = 0;
-int xruntest = 0; /* number of TCK cycles / microseconds */
-int xrepeat = 0x20; /* number of XC9500 retries */
+! Set the maximum loop count to 25.
+LCOUNT 25;
+! Step to DRPAUSE give 5 clocks and wait for 1.00e+000 SEC.
+LDELAY DRPAUSE 5 TCK 1.00E-003 SEC;
+! Test for the completed status. Match means pass.
+! Loop back to LDELAY line if not match and loop count less than 25.
-int xendir = 0;
-int xenddr = 0;
+LSDR 1 TDI (0)
+ TDO (1);
+*/
-enum tap_state xsvf_to_tap[] =
-{
- TAP_RESET, TAP_IDLE,
- TAP_DRSELECT, TAP_DRCAPTURE, TAP_DRSHIFT, TAP_DREXIT1, TAP_DRPAUSE, TAP_DREXIT2, TAP_DRUPDATE,
- TAP_IRSELECT, TAP_IRCAPTURE, TAP_IRSHIFT, TAP_IREXIT1, TAP_IRPAUSE, TAP_IREXIT2, TAP_IRUPDATE,
-};
+#define LCOUNT 0x19
+#define LDELAY 0x1A
+#define LSDR 0x1B
+
+
+/* XSVF valid state values for the XSTATE command, from appendix B of xapp503.pdf */
+#define XSV_RESET 0x00
+#define XSV_IDLE 0x01
+#define XSV_DRSELECT 0x02
+#define XSV_DRCAPTURE 0x03
+#define XSV_DRSHIFT 0x04
+#define XSV_DREXIT1 0x05
+#define XSV_DRPAUSE 0x06
+#define XSV_DREXIT2 0x07
+#define XSV_DRUPDATE 0x08
+#define XSV_IRSELECT 0x09
+#define XSV_IRCAPTURE 0x0A
+#define XSV_IRSHIFT 0x0B
+#define XSV_IREXIT1 0x0C
+#define XSV_IRPAUSE 0x0D
+#define XSV_IREXIT2 0x0E
+#define XSV_IRUPDATE 0x0F
+
+
+#define XSTATE_MAX_PATH 12
-int tap_to_xsvf[] =
+static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+
+static int xsvf_fd = 0;
+
+
+/* map xsvf tap state to an openocd "enum tap_state" */
+static tap_state_t xsvf_to_tap( int xsvf_state )
{
- 0x0, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x1, 0x9, 0xa, 0xb, 0xc, 0xe, 0xf
-};
+ tap_state_t ret;
+
+ switch( xsvf_state )
+ {
+ case XSV_RESET: ret = TAP_RESET; break;
+ case XSV_IDLE: ret = TAP_IDLE; break;
+ case XSV_DRSELECT: ret = TAP_DRSELECT; break;
+ case XSV_DRCAPTURE: ret = TAP_DRCAPTURE; break;
+ case XSV_DRSHIFT: ret = TAP_DRSHIFT; break;
+ case XSV_DREXIT1: ret = TAP_DREXIT1; break;
+ case XSV_DRPAUSE: ret = TAP_DRPAUSE; break;
+ case XSV_DREXIT2: ret = TAP_DREXIT2; break;
+ case XSV_DRUPDATE: ret = TAP_DRUPDATE; break;
+ case XSV_IRSELECT: ret = TAP_IRSELECT; break;
+ case XSV_IRCAPTURE: ret = TAP_IRCAPTURE; break;
+ case XSV_IRSHIFT: ret = TAP_IRSHIFT; break;
+ case XSV_IREXIT1: ret = TAP_IREXIT1; break;
+ case XSV_IRPAUSE: ret = TAP_IRPAUSE; break;
+ case XSV_IREXIT2: ret = TAP_IREXIT2; break;
+ case XSV_IRUPDATE: ret = TAP_IRUPDATE; break;
+ default:
+ LOG_ERROR( "UNKNOWN XSVF STATE 0x%02X", xsvf_state );
+ exit(1);
+ }
+
+ return ret;
+}
/* xsvf has it's own definition of a statemove. This needs
- * to be handled according to the specs, which has nothing
+ * to be handled according to the xsvf spec, which has nothing
* to do with the JTAG spec or OpenOCD as such.
*
* Implemented via jtag_add_pathmove().
*/
-void xsvf_add_statemove(enum tap_state state)
+static void xsvf_add_statemove(tap_state_t state)
{
- enum tap_state moves[7]; /* max # of transitions */
+ tap_state_t moves[7]; /* max # of transitions */
+ tap_state_t curstate = cmd_queue_cur_state;
int i;
- enum tap_state curstate = cmd_queue_cur_state;
+
u8 move = TAP_MOVE(cmd_queue_cur_state, state);
- if ((state != TAP_RESET) && (state == cmd_queue_cur_state))
+ if (state != TAP_RESET && state==cmd_queue_cur_state)
return;
if(state==TAP_RESET)
jtag_add_tlr();
return;
}
+
for (i=0; i<7; i++)
{
int j = (move >> i) & 1;
if (j)
{
curstate = tap_transitions[curstate].high;
- } else
+ }
+ else
{
curstate = tap_transitions[curstate].low;
}
int xsvf_register_commands(struct command_context_s *cmd_ctx)
{
register_command(cmd_ctx, NULL, "xsvf", handle_xsvf_command,
- COMMAND_EXEC, "run xsvf <file>");
+ COMMAND_EXEC, "run xsvf <file> [virt2]");
return ERROR_OK;
}
-int xsvf_read_buffer(int num_bits, int fd, u8* buf)
+static int xsvf_read_buffer(int num_bits, int fd, u8* buf)
{
int num_bytes;
for (num_bytes = (num_bits + 7) / 8; num_bytes > 0; num_bytes--)
{
+ /* reverse the order of bytes as they are read sequentially from file */
if (read(fd, buf + num_bytes - 1, 1) < 0)
return ERROR_XSVF_EOF;
}
return ERROR_OK;
}
-int xsvf_read_xstates(int fd, enum tap_state *path, int max_path, int *path_len)
+
+static int xsvf_read_xstates(int fd, tap_state_t *path, int max_path, int *path_len)
{
char c;
- unsigned char uc;
+ u8 uc;
- while ((read(fd, &c, 1) > 0) && (c == 0x12))
+ while ((read(fd, &c, 1) > 0) && (c == XSTATE))
{
+ tap_state_t mystate;
+
if (*path_len > max_path)
{
LOG_WARNING("XSTATE path longer than max_path");
{
return ERROR_XSVF_EOF;
}
- path[(*path_len)++] = xsvf_to_tap[uc];
+
+ mystate = xsvf_to_tap(uc);
+
+ LOG_DEBUG("XSTATE %02X %s", uc, jtag_state_name(mystate) );
+
+ path[(*path_len)++] = mystate;
}
lseek(fd, -1, SEEK_CUR);
return ERROR_OK;
}
-int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+
+static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
- char c;
- u8 buf4[4], buf2[2];
- unsigned char uc, uc2;
- unsigned int ui;
- unsigned short us;
+ u8 *dr_out_buf = NULL; /* from host to device (TDI) */
+ u8 *dr_in_buf = NULL; /* from device to host (TDO) */
+ u8 *dr_in_mask = NULL;
- int do_abort = 0;
- int unsupported = 0;
- int tdo_mismatch = 0;
+ int xsdrsize = 0;
+ int xruntest = 0; /* number of TCK cycles OR microseconds */
+ int xrepeat = 0; /* number of retries */
+
+ tap_state_t xendir = TAP_IDLE; /* see page 8 of the SVF spec, initial xendir to be TAP_IDLE */
+ tap_state_t xenddr = TAP_IDLE;
+
+ u8 opcode;
+ u8 uc;
+ long file_offset = 0;
+
+ int loop_count = 0;
+ tap_state_t loop_state = TAP_IDLE;
+ int loop_clocks = 0;
+ int loop_usecs = 0;
+
+ int do_abort = 0;
+ int unsupported = 0;
+ int tdo_mismatch = 0;
+ int result;
+
+ int runtest_requires_tck = 0; /* a flag telling whether to clock TCK during waits, or simply sleep, controled by virt2 */
- int runtest_requires_tck = 0;
- jtag_tap_t *tap = NULL;
/* use NULL to indicate a "plain" xsvf file which accounts for
additional devices in the scan chain, otherwise the device
- that should be affected */
+ that should be affected
+ */
+ jtag_tap_t *tap = NULL;
if (argc < 2)
{
command_print(cmd_ctx, "usage: xsvf <device#|plain> <file> <variant>");
- return ERROR_OK;
+ return ERROR_FAIL;
}
if (strcmp(args[0], "plain") != 0)
{
- tap = jtag_TapByString( args[0] );
- if( !tap ){
- command_print( cmd_ctx, "Tap: %s unknown", args[0] );
- return ERROR_OK;
- }
+ tap = jtag_TapByString( args[0] );
+ if (!tap )
+ {
+ command_print( cmd_ctx, "Tap: %s unknown", args[0] );
+ return ERROR_FAIL;
+ }
}
if ((xsvf_fd = open(args[1], O_RDONLY)) < 0)
{
- command_print(cmd_ctx, "file %s not found", args[0]);
- return ERROR_OK;
+ command_print(cmd_ctx, "file \"%s\" not found", args[1]);
+ return ERROR_FAIL;
}
+ /* if this argument is present, then interpret xruntest counts as TCK cycles rather than as usecs */
if ((argc > 2) && (strcmp(args[2], "virt2") == 0))
{
runtest_requires_tck = 1;
}
- while (read(xsvf_fd, &c, 1) > 0)
+ LOG_USER("xsvf processing file: \"%s\"", args[1]);
+
+ while( read(xsvf_fd, &opcode, 1) > 0 )
{
- switch (c)
+ /* record the position of the just read opcode within the file */
+ file_offset = lseek(xsvf_fd, 0, SEEK_CUR) - 1;
+
+ switch (opcode)
{
- case 0x00: /* XCOMPLETE */
+ case XCOMPLETE:
LOG_DEBUG("XCOMPLETE");
- if (jtag_execute_queue() != ERROR_OK)
+
+ result = jtag_execute_queue();
+ if (result != ERROR_OK)
{
tdo_mismatch = 1;
break;
}
break;
- case 0x01: /* XTDOMASK */
+
+ case XTDOMASK:
LOG_DEBUG("XTDOMASK");
if (dr_in_mask && (xsvf_read_buffer(xsdrsize, xsvf_fd, dr_in_mask) != ERROR_OK))
do_abort = 1;
break;
- case 0x02: /* XSIR */
- LOG_DEBUG("XSIR");
- if (read(xsvf_fd, &c, 1) < 0)
- do_abort = 1;
- else
+
+ case XRUNTEST:
{
- u8 *ir_buf = malloc((c + 7) / 8);
- if (xsvf_read_buffer(c, xsvf_fd, ir_buf) != ERROR_OK)
- do_abort = 1;
- else
+ u8 xruntest_buf[4];
+
+ if (read(xsvf_fd, xruntest_buf, 4) < 0)
{
- scan_field_t field;
- field.tap = tap;
- field.num_bits = c;
- field.out_value = ir_buf;
- field.out_mask = NULL;
- field.in_value = NULL;
- field.in_check_value = NULL;
- field.in_check_mask = NULL;
- field.in_handler = NULL;
- field.in_handler_priv = NULL;
- if (tap == NULL)
- jtag_add_plain_ir_scan(1, &field, TAP_IRPAUSE);
- else
- jtag_add_ir_scan(1, &field, TAP_IRPAUSE);
- if (jtag_execute_queue() != ERROR_OK)
- {
- tdo_mismatch = 1;
- free(ir_buf);
- break;
- }
- if (xruntest)
- {
- if (runtest_requires_tck)
- jtag_add_runtest(xruntest, xsvf_to_tap[xendir]);
- else
- {
- xsvf_add_statemove(TAP_IDLE);
- jtag_add_sleep(xruntest);
- xsvf_add_statemove(xsvf_to_tap[xendir]);
- }
- }
- else if (xendir != 0xd) /* Pause-IR */
- xsvf_add_statemove(xsvf_to_tap[xendir]);
+ do_abort = 1;
+ break;
}
- free(ir_buf);
+
+ xruntest = be_to_h_u32(xruntest_buf);
+ LOG_DEBUG("XRUNTEST %d 0x%08X", xruntest, xruntest);
}
break;
- case 0x03: /* XSDR */
- LOG_DEBUG("XSDR");
- if (xsvf_read_buffer(xsdrsize, xsvf_fd, dr_out_buf) != ERROR_OK)
- do_abort = 1;
- else
+
+ case XREPEAT:
{
- scan_field_t field;
- field.tap = tap;
- field.num_bits = xsdrsize;
- field.out_value = dr_out_buf;
- field.out_mask = NULL;
- field.in_value = NULL;
- jtag_set_check_value(&field, dr_in_buf, dr_in_mask, NULL);
- if (tap == NULL)
- jtag_add_plain_dr_scan(1, &field, TAP_DRPAUSE);
+ u8 myrepeat;
+
+ if (read(xsvf_fd, &myrepeat, 1) < 0)
+ do_abort = 1;
else
- jtag_add_dr_scan(1, &field, TAP_DRPAUSE);
- if (jtag_execute_queue() != ERROR_OK)
{
- tdo_mismatch = 1;
- break;
+ xrepeat = myrepeat;
+ LOG_DEBUG("XREPEAT %d", xrepeat );
}
- if (xruntest)
- {
- if (runtest_requires_tck)
- jtag_add_runtest(xruntest, xsvf_to_tap[xenddr]);
- else
- {
- xsvf_add_statemove(TAP_IDLE);
- jtag_add_sleep(xruntest);
- xsvf_add_statemove(xsvf_to_tap[xenddr]);
- }
- }
- else if (xendir != 0x6) /* Pause-DR */
- xsvf_add_statemove(xsvf_to_tap[xenddr]);
- }
- break;
- case 0x04: /* XRUNTEST */
- LOG_DEBUG("XRUNTEST");
- if (read(xsvf_fd, buf4, 4) < 0)
- do_abort = 1;
- else
- {
- xruntest = be_to_h_u32(buf4);
}
break;
- case 0x07: /* XREPEAT */
- LOG_DEBUG("XREPEAT");
- if (read(xsvf_fd, &c, 1) < 0)
- do_abort = 1;
- else
- {
- xrepeat = c;
- }
- break;
- case 0x08: /* XSDRSIZE */
- LOG_DEBUG("XSDRSIZE");
- if (read(xsvf_fd, buf4, 4) < 0)
- do_abort = 1;
- else
+
+ case XSDRSIZE:
{
- xsdrsize = be_to_h_u32(buf4);
- free(dr_out_buf);
- free(dr_in_buf);
- free(dr_in_mask);
+ u8 xsdrsize_buf[4];
+
+ if (read(xsvf_fd, xsdrsize_buf, 4) < 0)
+ {
+ do_abort = 1;
+ break;
+ }
+
+ xsdrsize = be_to_h_u32(xsdrsize_buf);
+ LOG_DEBUG("XSDRSIZE %d", xsdrsize);
+
+ if( dr_out_buf ) free(dr_out_buf);
+ if( dr_in_buf) free(dr_in_buf);
+ if( dr_in_mask) free(dr_in_mask);
+
dr_out_buf = malloc((xsdrsize + 7) / 8);
dr_in_buf = malloc((xsdrsize + 7) / 8);
dr_in_mask = malloc((xsdrsize + 7) / 8);
}
break;
- case 0x09: /* XSDRTDO */
- LOG_DEBUG("XSDRTDO");
- if (xsvf_read_buffer(xsdrsize, xsvf_fd, dr_out_buf) != ERROR_OK)
- do_abort = 1;
- else
+
+ case XSDR: /* these two are identical except for the dr_in_buf */
+ case XSDRTDO:
{
- if (xsvf_read_buffer(xsdrsize, xsvf_fd, dr_in_buf) != ERROR_OK)
+ int limit = xrepeat;
+ int matched = 0;
+ int attempt;
+
+ const char* op_name = (opcode == XSDR ? "XSDR" : "XSDRTDO");
+
+ if (xsvf_read_buffer(xsdrsize, xsvf_fd, dr_out_buf) != ERROR_OK)
+ {
do_abort = 1;
- else
+ break;
+ }
+
+ if (opcode == XSDRTDO)
+ {
+ if(xsvf_read_buffer(xsdrsize, xsvf_fd, dr_in_buf) != ERROR_OK )
+ {
+ do_abort = 1;
+ break;
+ }
+ }
+
+ if (limit < 1)
+ limit = 1;
+
+ LOG_DEBUG("%s %d", op_name, xsdrsize);
+
+ for( attempt=0; attempt<limit; ++attempt )
{
scan_field_t field;
+
+ if( attempt>0 )
+ {
+ /* perform the XC9500 exception handling sequence shown in xapp067.pdf and
+ illustrated in psuedo code at end of this file. We start from state
+ DRPAUSE:
+ go to Exit2-DR
+ go to Shift-DR
+ go to Exit1-DR
+ go to Update-DR
+ go to Run-Test/Idle
+
+ This sequence should be harmless for other devices, and it
+ will be skipped entirely if xrepeat is set to zero.
+ */
+
+ static tap_state_t exception_path[] = {
+ TAP_DREXIT2,
+ TAP_DRSHIFT,
+ TAP_DREXIT1,
+ TAP_DRUPDATE,
+ TAP_IDLE,
+ };
+
+ jtag_add_pathmove( sizeof(exception_path)/sizeof(exception_path[0]), exception_path);
+
+ LOG_USER("%s %d retry %d", op_name, xsdrsize, attempt);
+ }
+
field.tap = tap;
field.num_bits = xsdrsize;
field.out_value = dr_out_buf;
field.out_mask = NULL;
field.in_value = NULL;
+
jtag_set_check_value(&field, dr_in_buf, dr_in_mask, NULL);
+
if (tap == NULL)
jtag_add_plain_dr_scan(1, &field, TAP_DRPAUSE);
else
jtag_add_dr_scan(1, &field, TAP_DRPAUSE);
- if (jtag_execute_queue() != ERROR_OK)
+
+ /* LOG_DEBUG("FLUSHING QUEUE"); */
+ result = jtag_execute_queue();
+ if (result == ERROR_OK)
{
- tdo_mismatch = 1;
+ matched = 1;
break;
}
- if (xruntest)
- {
- if (runtest_requires_tck)
- jtag_add_runtest(xruntest, xsvf_to_tap[xenddr]);
- else
- {
- xsvf_add_statemove(TAP_IDLE);
- jtag_add_sleep(xruntest);
- xsvf_add_statemove(xsvf_to_tap[xenddr]);
- }
- }
- else if (xendir != 0x6) /* Pause-DR */
- xsvf_add_statemove(xsvf_to_tap[xenddr]);
}
+
+ if (!matched)
+ {
+ LOG_USER( "%s mismatch", op_name);
+ tdo_mismatch = 1;
+ break;
+ }
+
+ /* See page 19 of XSVF spec regarding opcode "XSDR" */
+ if (xruntest)
+ {
+ xsvf_add_statemove(TAP_IDLE);
+
+ if (runtest_requires_tck)
+ jtag_add_clocks(xruntest);
+ else
+ jtag_add_sleep(xruntest);
+ }
+ else if (xendir != TAP_DRPAUSE) /* we are already in TAP_DRPAUSE */
+ xsvf_add_statemove(xenddr);
}
break;
- case 0x0a: /* XSETDRMASKS */
+
+ case XSETSDRMASKS:
LOG_ERROR("unsupported XSETSDRMASKS\n");
unsupported = 1;
break;
- case 0x0b: /* XSDRINC */
+
+ case XSDRINC:
LOG_ERROR("unsupported XSDRINC\n");
unsupported = 1;
break;
- case 0x0c: /* XSDRB */
+
+ case XSDRB:
+ LOG_ERROR("unsupported XSDRB\n");
unsupported = 1;
break;
- case 0x0d: /* XSDRC */
+
+ case XSDRC:
+ LOG_ERROR("unsupported XSDRC\n");
unsupported = 1;
break;
- case 0x0e: /* XSDRE */
+
+ case XSDRE:
+ LOG_ERROR("unsupported XSDRE\n");
unsupported = 1;
break;
- case 0x0f: /* XSDRTDOB */
+
+ case XSDRTDOB:
+ LOG_ERROR("unsupported XSDRTDOB\n");
unsupported = 1;
break;
- case 0x10: /* XSDRTDOB */
+
+ case XSDRTDOC:
+ LOG_ERROR("unsupported XSDRTDOC\n");
unsupported = 1;
break;
- case 0x11: /* XSDRTDOB */
+
+ case XSDRTDOE:
+ LOG_ERROR("unsupported XSDRTDOE\n");
unsupported = 1;
break;
- case 0x12: /* XSTATE */
- LOG_DEBUG("XSTATE");
- if (read(xsvf_fd, &uc, 1) < 0)
- do_abort = 1;
- else
+
+ case XSTATE:
{
- enum tap_state *path = calloc(XSTATE_MAX_PATH, 4);
- int path_len = 1;
- path[0] = xsvf_to_tap[uc];
+ tap_state_t mystate;
+ tap_state_t *path;
+ int path_len;
+
+ if (read(xsvf_fd, &uc, 1) < 0)
+ {
+ do_abort = 1;
+ break;
+ }
+
+ mystate = xsvf_to_tap(uc);
+
+ LOG_DEBUG("XSTATE 0x%02X %s", uc, jtag_state_name(mystate) );
+
+ path = calloc(XSTATE_MAX_PATH, 4);
+ path_len = 1;
+
+ path[0] = mystate;
if (xsvf_read_xstates(xsvf_fd, path, XSTATE_MAX_PATH, &path_len) != ERROR_OK)
do_abort = 1;
else
{
int i,lasti;
+
/* here the trick is that jtag_add_pathmove() must end in a stable
- state, so we must only invoke jtag_add_tlr() when we absolutely
- have to
- */
- for(i=0,lasti=0;i<path_len;i++)
+ * state, so we must only invoke jtag_add_tlr() when we absolutely
+ * have to
+ */
+ for(i=0,lasti=0; i<path_len; i++)
{
if(path[i]==TAP_RESET)
{
free(path);
}
break;
- case 0x13: /* XENDIR */
- LOG_DEBUG("XENDIR");
- if (read(xsvf_fd, &c, 1) < 0)
- do_abort = 1;
- else
+
+ case XENDIR:
{
- if (c == 0)
- xendir = 1;
- else if (c == 1)
- xendir = 0xd;
- else
+ tap_state_t mystate;
+
+ if (read(xsvf_fd, &uc, 1) < 0)
+ {
+ do_abort = 1;
+ break;
+ }
+
+ /* see page 22 of XSVF spec */
+ mystate = uc == 1 ? TAP_IRPAUSE : TAP_IDLE;
+
+ LOG_DEBUG("XENDIR 0x%02X %s", uc, jtag_state_name(mystate));
+
+ /* assuming that the XRUNTEST comes from SVF RUNTEST, then only these states
+ * should come here because the SVF spec only allows these with a RUNTEST
+ */
+ if (mystate != TAP_IRPAUSE && mystate != TAP_DRPAUSE && mystate != TAP_RESET && mystate != TAP_IDLE )
{
- LOG_ERROR("unknown XENDIR endstate");
+ LOG_ERROR("illegal XENDIR endstate: \"%s\"", jtag_state_name(mystate));
unsupported = 1;
+ break;
}
+ xendir = mystate;
}
break;
- case 0x14: /* XENDDR */
- LOG_DEBUG("XENDDR");
- if (read(xsvf_fd, &c, 1) < 0)
- do_abort = 1;
- else
+
+ case XENDDR:
{
- if (c == 0)
- xenddr = 1;
- else if (c == 1)
- xenddr = 0x6;
- else
+ tap_state_t mystate;
+
+ if (read(xsvf_fd, &uc, 1) < 0)
{
- LOG_ERROR("unknown XENDDR endstate");
+ do_abort = 1;
+ break;
+ }
+
+ /* see page 22 of XSVF spec */
+ mystate = uc == 1 ? TAP_DRPAUSE : TAP_IDLE;
+
+ LOG_DEBUG("XENDDR %02X %s", uc, jtag_state_name(mystate));
+
+ if (mystate != TAP_IRPAUSE && mystate != TAP_DRPAUSE && mystate != TAP_RESET && mystate != TAP_IDLE )
+ {
+ LOG_ERROR("illegal XENDDR endstate: \"%s\"", jtag_state_name( mystate ));
unsupported = 1;
+ break;
}
+ xenddr = mystate;
}
break;
- case 0x15: /* XSIR2 */
- LOG_DEBUG("XSIR2");
- if (read(xsvf_fd, buf2, 2) < 0)
- do_abort = 1;
- else
+
+ case XSIR:
+ case XSIR2:
{
- u8 *ir_buf;
- us = be_to_h_u16(buf2);
- ir_buf = malloc((us + 7) / 8);
- if (xsvf_read_buffer(us, xsvf_fd, ir_buf) != ERROR_OK)
+ u8 short_buf[2];
+ u8* ir_buf;
+ int bitcount;
+ tap_state_t my_end_state = xruntest ? TAP_IDLE : xendir;
+
+ if( opcode == XSIR )
+ {
+ /* one byte bitcount */
+ if (read(xsvf_fd, short_buf, 1) < 0)
+ {
+ do_abort = 1;
+ break;
+ }
+ bitcount = short_buf[0];
+ LOG_DEBUG("XSIR %d", bitcount);
+ }
+ else
+ {
+ if (read(xsvf_fd, short_buf, 2) < 0)
+ {
+ do_abort = 1;
+ break;
+ }
+ bitcount = be_to_h_u16(short_buf);
+ LOG_DEBUG("XSIR2 %d", bitcount);
+ }
+
+ ir_buf = malloc((bitcount+7) / 8);
+
+ if (xsvf_read_buffer(bitcount, xsvf_fd, ir_buf) != ERROR_OK)
do_abort = 1;
else
{
scan_field_t field;
+
field.tap = tap;
- field.num_bits = us;
+ field.num_bits = bitcount;
field.out_value = ir_buf;
field.out_mask = NULL;
field.in_value = NULL;
field.in_check_mask = NULL;
field.in_handler = NULL;
field.in_handler_priv = NULL;
+
if (tap == NULL)
- jtag_add_plain_ir_scan(1, &field, xsvf_to_tap[xendir]);
+ jtag_add_plain_ir_scan(1, &field, my_end_state);
else
- jtag_add_ir_scan(1, &field, xsvf_to_tap[xendir]);
+ jtag_add_ir_scan(1, &field, my_end_state);
+
+ if (xruntest)
+ {
+ if (runtest_requires_tck)
+ jtag_add_clocks(xruntest);
+ else
+ jtag_add_sleep(xruntest);
+ }
+
+ /* Note that an -irmask of non-zero in your config file
+ * can cause this to fail. Setting -irmask to zero cand work
+ * around the problem.
+ */
+
+ /* LOG_DEBUG("FLUSHING QUEUE"); */
+ result = jtag_execute_queue();
+ if(result != ERROR_OK)
+ {
+ tdo_mismatch = 1;
+ }
}
free(ir_buf);
}
break;
- case 0x16: /* XCOMMENT */
- do
+
+ case XCOMMENT:
{
- if (read(xsvf_fd, &c, 1) < 0)
+ int ndx = 0;
+ char comment[128];
+
+ do
+ {
+ if (read(xsvf_fd, &uc, 1) < 0)
+ {
+ do_abort = 1;
+ break;
+ }
+
+ if ( ndx < sizeof(comment)-1 )
+ comment[ndx++] = uc;
+
+ } while (uc != 0);
+
+ comment[sizeof(comment)-1] = 0; /* regardless, terminate */
+ LOG_USER(comment);
+ }
+ break;
+
+ case XWAIT:
+ {
+ /* expected in stream:
+ XWAIT <u8 wait_state> <u8 end_state> <u32 usecs>
+ */
+
+ u8 wait;
+ u8 end;
+ u8 delay_buf[4];
+
+ tap_state_t wait_state;
+ tap_state_t end_state;
+ int delay;
+
+ if ( read(xsvf_fd, &wait, 1) < 0
+ || read(xsvf_fd, &end, 1) < 0
+ || read(xsvf_fd, delay_buf, 4) < 0)
{
do_abort = 1;
break;
}
- } while (c != 0);
+
+ wait_state = xsvf_to_tap(wait);
+ end_state = xsvf_to_tap(end);
+ delay = be_to_h_u32(delay_buf);
+
+ LOG_DEBUG("XWAIT %s %s usecs:%d", jtag_state_name(wait_state), jtag_state_name(end_state), delay);
+
+ if (runtest_requires_tck && wait_state == TAP_IDLE )
+ {
+ jtag_add_runtest(delay, end_state);
+ }
+ else
+ {
+ xsvf_add_statemove( wait_state );
+ jtag_add_sleep(delay);
+ xsvf_add_statemove( end_state );
+ }
+ }
break;
- case 0x17: /* XWAIT */
- LOG_DEBUG("XWAIT");
- if ((read(xsvf_fd, &uc, 1) < 0) || (read(xsvf_fd, &uc2, 1) < 0) || (read(xsvf_fd, buf4, 4) < 0))
- do_abort = 1;
- else
+
+ case XWAITSTATE:
+ {
+ /* expected in stream:
+ XWAITSTATE <u8 wait_state> <u8 end_state> <u32 clock_count> <u32 usecs>
+ */
+
+ u8 clock_buf[4];
+ u8 usecs_buf[4];
+ u8 wait;
+ u8 end;
+ tap_state_t wait_state;
+ tap_state_t end_state;
+ int clock_count;
+ int usecs;
+
+ if ( read(xsvf_fd, &wait, 1) < 0
+ || read(xsvf_fd, &end, 1) < 0
+ || read(xsvf_fd, clock_buf, 4) < 0
+ || read(xsvf_fd, usecs_buf, 4) < 0 )
+ {
+ do_abort = 1;
+ break;
+ }
+
+ wait_state = xsvf_to_tap( wait );
+ end_state = xsvf_to_tap( end );
+
+ clock_count = be_to_h_u32(clock_buf);
+ usecs = be_to_h_u32(usecs_buf);
+
+ LOG_DEBUG("XWAITSTATE %s %s clocks:%i usecs:%i",
+ jtag_state_name(wait_state),
+ jtag_state_name(end_state),
+ clock_count, usecs);
+
+ /* the following states are 'stable', meaning that they have a transition
+ * in the state diagram back to themselves. This is necessary because we will
+ * be issuing a number of clocks in this state. This set of allowed states is also
+ * determined by the SVF RUNTEST command's allowed states.
+ */
+ if (wait_state != TAP_IRPAUSE && wait_state != TAP_DRPAUSE && wait_state != TAP_RESET && wait_state != TAP_IDLE)
+ {
+ LOG_ERROR("illegal XWAITSTATE wait_state: \"%s\"", jtag_state_name( wait_state ));
+ unsupported = 1;
+ }
+
+ xsvf_add_statemove( wait_state );
+
+ jtag_add_clocks( clock_count );
+
+ jtag_add_sleep( usecs );
+
+ xsvf_add_statemove( end_state );
+ }
+ break;
+
+ case LCOUNT:
{
- xsvf_add_statemove(xsvf_to_tap[uc]);
- ui = be_to_h_u32(buf4);
- jtag_add_sleep(ui);
- xsvf_add_statemove(xsvf_to_tap[uc2]);
+ /* expected in stream:
+ LCOUNT <u32 loop_count>
+ */
+ u8 count_buf[4];
+
+ if ( read(xsvf_fd, count_buf, 4) < 0 )
+ {
+ do_abort = 1;
+ break;
+ }
+
+ loop_count = be_to_h_u32(count_buf);
+ LOG_DEBUG("LCOUNT %d", loop_count);
+ }
+ break;
+
+ case LDELAY:
+ {
+ /* expected in stream:
+ LDELAY <u8 wait_state> <u32 clock_count> <u32 usecs_to_sleep>
+ */
+ u8 state;
+ u8 clock_buf[4];
+ u8 usecs_buf[4];
+
+ if ( read(xsvf_fd, &state, 1) < 0
+ || read(xsvf_fd, clock_buf, 4) < 0
+ || read(xsvf_fd, usecs_buf, 4) < 0 )
+ {
+ do_abort = 1;
+ break;
+ }
+
+ loop_state = xsvf_to_tap(state);
+ loop_clocks = be_to_h_u32(clock_buf);
+ loop_usecs = be_to_h_u32(usecs_buf);
+
+ LOG_DEBUG("LDELAY %s clocks:%d usecs:%d", jtag_state_name(loop_state), loop_clocks, loop_usecs);
+ }
+ break;
+
+ /* LSDR is more like XSDRTDO than it is like XSDR. It uses LDELAY which
+ * comes with clocks !AND! sleep requirements.
+ */
+ case LSDR:
+ {
+ int limit = loop_count;
+ int matched = 0;
+ int attempt;
+
+ LOG_DEBUG("LSDR");
+
+ if ( xsvf_read_buffer(xsdrsize, xsvf_fd, dr_out_buf) != ERROR_OK
+ || xsvf_read_buffer(xsdrsize, xsvf_fd, dr_in_buf) != ERROR_OK )
+ {
+ do_abort = 1;
+ break;
+ }
+
+ if (limit < 1)
+ limit = 1;
+
+ for( attempt=0; attempt<limit; ++attempt )
+ {
+ scan_field_t field;
+
+ field.tap = tap;
+ field.num_bits = xsdrsize;
+ field.out_value = dr_out_buf;
+ field.out_mask = NULL;
+ field.in_value = NULL;
+
+ if (attempt > 0)
+ LOG_USER("LSDR retry %d", attempt);
+
+ jtag_set_check_value(&field, dr_in_buf, dr_in_mask, NULL);
+ if (tap == NULL)
+ jtag_add_plain_dr_scan(1, &field, loop_state);
+ else
+ jtag_add_dr_scan(1, &field, loop_state);
+
+ /* LOG_DEBUG("FLUSHING QUEUE"); */
+ result = jtag_execute_queue();
+ if(result == ERROR_OK)
+ {
+ matched = 1;
+ break;
+ }
+
+ jtag_add_clocks(loop_clocks);
+ jtag_add_sleep(loop_usecs);
+ }
+
+ if (!matched )
+ {
+ LOG_USER( "LSDR mismatch" );
+ tdo_mismatch = 1;
+ break;
+ }
}
break;
+
default:
- LOG_ERROR("unknown xsvf command (0x%2.2x)\n", c);
+ LOG_ERROR("unknown xsvf command (0x%02X)\n", uc);
unsupported = 1;
}
if (do_abort || unsupported || tdo_mismatch)
+ {
+ LOG_DEBUG("xsvf failed, setting taps to reasonable state");
+
+ /* upon error, return the TAPs to a reasonable state */
+ xsvf_add_statemove( TAP_IDLE );
+ jtag_execute_queue();
break;
+ }
}
if (tdo_mismatch)
{
- command_print(cmd_ctx, "TDO mismatch, aborting");
- return ERROR_OK;
+ command_print(cmd_ctx, "TDO mismatch, somewhere near offset %lu in xsvf file, aborting",
+ file_offset );
+
+
+ return ERROR_FAIL;
}
if (unsupported)
{
- command_print(cmd_ctx, "unsupported xsvf command encountered, aborting");
- return ERROR_OK;
+ command_print(cmd_ctx,
+ "unsupported xsvf command: 0x%02X in xsvf file at offset %ld, aborting",
+ uc, lseek(xsvf_fd, 0, SEEK_CUR)-1 );
+ return ERROR_FAIL;
}
if (do_abort)
{
- command_print(cmd_ctx, "premature end detected, aborting");
- return ERROR_OK;
+ command_print(cmd_ctx, "premature end of xsvf file detected, aborting");
+ return ERROR_FAIL;
}
if (dr_out_buf)
return ERROR_OK;
}
+
+
+/* PSUEDO-Code from Xilinx Appnote XAPP067.pdf:
+
+the following pseudo code clarifies the intent of the xrepeat support. The
+flow given is for the entire processing of an SVF file, not an XSVF file.
+No idea if this is just for the XC9500/XL/XV devices or all Xilinx parts.
+
+"Pseudo-Code Algorithm for SVF-Based ISP"
+
+1. Go to Test-Logic-Reset state
+2. Go to Run-Test Idle state
+3. Read SVF record
+
+4. if SIR record then
+ go to Shift-IR state
+ Scan in <TDI value>
+
+5. else if SDR record then
+ set <repeat count> to 0
+ store <TDI value> as <current TDI value>
+ store <TDO value> as <current TDO value>
+6. go to Shift-DR state
+ scan in <current TDI value>
+ if <current TDO value> is specified then
+ if <current TDO value> does not equal <actual TDO value> then
+ if <repeat count> > 32 then
+ LOG ERROR
+ go to Run-Test Idle state
+ go to Step 3
+ end if
+ go to Pause-DR
+ go to Exit2-DR
+ go to Shift-DR
+ go to Exit1-DR
+ go to Update-DR
+ go to Run-Test/Idle
+ increment <repeat count> by 1
+ pause <current pause time> microseconds
+ go to Step 6)
+ end if
+ else
+ go to Run-Test Idle state
+ go to Step 3
+ endif
+else if RUNTEST record then
+ pause tester for <TCK value> microseconds
+ store <TCK value> as <current pause time>
+end if
+
+*/
projects / openocd / commitdiff