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JTAG: shrink "scan_chain" output 

Tweak the "scan_chain" output by removing column separators.  Also
remove the "current instruction" state ... which changes constantly.

Now its style resembles the "targets" output, and can even fit on
one line in standard terminals and in the PDF docs.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell 2009-12-16 14:19:44 -08:00
parent d265c219b9
commit 2c3e413d49
2 changed files with 15 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
doc/openocd.texi
View File

@ -2592,13 +2592,15 @@ debugging targets.)
Here's what the scan chain might look like for a chip more than one TAP:
@verbatim
TapName Enabled IdCode Expected IrLen IrCap IrMask Instr
-- ------------------ ------- ---------- ---------- ----- ----- ------ -----
0 omap5912.dsp Y 0x03df1d81 0x03df1d81 38 0 0 0x...
1 omap5912.arm Y 0x0692602f 0x0692602f 4 0x1 0 0xc
2 omap5912.unknown Y 0x00000000 0x00000000 8 0 0 0xff
TapName Enabled IdCode Expected IrLen IrCap IrMask
-- ------------------ ------- ---------- ---------- ----- ----- ------
0 omap5912.dsp Y 0x03df1d81 0x03df1d81 38 0x01 0x03
1 omap5912.arm Y 0x0692602f 0x0692602f 4 0x01 0x0f
2 omap5912.unknown Y 0x00000000 0x00000000 8 0x01 0x03
@end verbatim
OpenOCD can detect some of that information, but not all
of it. @xref{Autoprobing}.
Unfortunately those TAPs can't always be autoconfigured,
because not all devices provide good support for that.
JTAG doesn't require supporting IDCODE instructions, and
@ -2659,8 +2661,6 @@ The set of TAPs listed by this command is fixed by
exiting the OpenOCD configuration stage,
but systems with a JTAG router can
enable or disable TAPs dynamically.
In addition to the enable/disable status, the contents of
each TAP's instruction register can also change.
@end deffn
@c FIXME! "jtag cget" should be able to return all TAP

16
src/jtag/tcl.c
View File

@ -1021,11 +1021,13 @@ COMMAND_HANDLER(handle_scan_chain_command)
char expected_id[12];
tap = jtag_all_taps();
command_print(CMD_CTX, " TapName | Enabled | IdCode Expected IrLen IrCap IrMask Instr ");
command_print(CMD_CTX, "---|--------------------|---------|------------|------------|------|------|------|---------");
command_print(CMD_CTX,
" TapName Enabled IdCode Expected IrLen IrCap IrMask");
command_print(CMD_CTX,
"-- ------------------- -------- ---------- ---------- ----- ----- ------");
while (tap) {
uint32_t expected, expected_mask, cur_instr, ii;
uint32_t expected, expected_mask, ii;
snprintf(expected_id, sizeof expected_id, "0x%08x",
(unsigned)((tap->expected_ids_cnt > 0)
@ -1036,10 +1038,9 @@ COMMAND_HANDLER(handle_scan_chain_command)
expected = buf_get_u32(tap->expected, 0, tap->ir_length);
expected_mask = buf_get_u32(tap->expected_mask, 0, tap->ir_length);
cur_instr = buf_get_u32(tap->cur_instr, 0, tap->ir_length);
command_print(CMD_CTX,
"%2d | %-18s | %c | 0x%08x | %s | 0x%02x | 0x%02x | 0x%02x | 0x%02x",
"%2d %-18s %c 0x%08x %s %5d 0x%02x 0x%02x",
tap->abs_chain_position,
tap->dotted_name,
tap->enabled ? 'Y' : 'n',
@ -1047,8 +1048,7 @@ COMMAND_HANDLER(handle_scan_chain_command)
expected_id,
(unsigned int)(tap->ir_length),
(unsigned int)(expected),
(unsigned int)(expected_mask),
(unsigned int)(cur_instr));
(unsigned int)(expected_mask));
for (ii = 1; ii < tap->expected_ids_cnt; ii++) {
snprintf(expected_id, sizeof expected_id, "0x%08x",
@ -1057,7 +1057,7 @@ COMMAND_HANDLER(handle_scan_chain_command)
expected_id[2] = '*';
command_print(CMD_CTX,
" | | | | %s | | | | ",
" %s",
expected_id);
}