diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/openocd.texi | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi index 6057aad2..b91e7540 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -2501,7 +2501,7 @@ signal implementations. The default behaviour if no option given is @option{separate}, indicating everything behaves normally. @option{srst_pulls_trst} states that the -test logic is reset together with the reset of the system (e.g. Philips +test logic is reset together with the reset of the system (e.g. NXP LPC2000, "broken" board layout), @option{trst_pulls_srst} says that the system is reset together with the test logic (only hypothetical, I haven't seen hardware with such a bug, and can be worked around). @@ -5867,26 +5867,36 @@ ARM9TDMI, ARM920T or ARM926EJ-S. They are available in addition to the ARM commands, and any other core-specific commands that may be available. -@deffn Command {arm7_9 dbgrq} (@option{enable}|@option{disable}) -Control use of the EmbeddedIce DBGRQ signal to force entry into debug mode, -instead of breakpoints. This should be -safe for all but ARM7TDMI--S cores (like Philips LPC). +@deffn Command {arm7_9 dbgrq} [@option{enable}|@option{disable}] +Displays the value of the flag controlling use of the +the EmbeddedIce DBGRQ signal to force entry into debug mode, +instead of breakpoints. +If a boolean parameter is provided, first assigns that flag. + +This should be +safe for all but ARM7TDMI-S cores (like NXP LPC). This feature is enabled by default on most ARM9 cores, including ARM9TDMI, ARM920T, and ARM926EJ-S. @end deffn -@deffn Command {arm7_9 dcc_downloads} (@option{enable}|@option{disable}) +@deffn Command {arm7_9 dcc_downloads} [@option{enable}|@option{disable}] @cindex DCC -Control the use of the debug communications channel (DCC) to write larger (>128 byte) -amounts of memory. DCC downloads offer a huge speed increase, but might be +Displays the value of the flag controlling use of the debug communications +channel (DCC) to write larger (>128 byte) amounts of memory. +If a boolean parameter is provided, first assigns that flag. + +DCC downloads offer a huge speed increase, but might be unsafe, especially with targets running at very low speeds. This command was introduced with OpenOCD rev. 60, and requires a few bytes of working area. @end deffn @anchor{arm7_9 fast_memory_access} -@deffn Command {arm7_9 fast_memory_access} (@option{enable}|@option{disable}) -Enable or disable memory writes and reads that don't check completion of -the operation. This provides a huge speed increase, especially with USB JTAG +@deffn Command {arm7_9 fast_memory_access} [@option{enable}|@option{disable}] +Displays the value of the flag controlling use of memory writes and reads +that don't check completion of the operation. +If a boolean parameter is provided, first assigns that flag. + +This provides a huge speed increase, especially with USB JTAG cables (FT2232), but might be unsafe if used with targets running at very low speeds, like the 32kHz startup clock of an AT91RM9200. @end deffn |