Segger J-Link User Manual page 97

5.7.1.3 Break/Watch
In the Break/Watch section all breakpoints and watchpoints which are in the DLL
internal breakpoint and watchpoint list are shown.
Section: Code
Lists all breakpoints which are in the DLL internal breakpoint list are shown.
• Handle: Shows the handle of the breakpoint.
• Address: Shows the address where the breakpoint is set.
• Mode: Describes the breakpoint type (ARM/THUMB)
• Permission: Describes the breakpoint implementation flags.
• Implementation: Describes the breakpoint implementation type. The break-
point types are: RAM, Flash, Hard. An additional TBC (to be cleared) or TBS (to
be set) gives information about if the breakpoint is (still) written to the target or
if it's just in the breakpoint list to be written/cleared.
Note: It is possible for the debugger to bypass the breakpoint functionality of
the J-Link software by writing to the debug registers directly. This means for ARM7/
ARM9 cores write accesses to the ICE registers, for Cortex-M3 devices write accesses
to the memory mapped flash breakpoint registers and in general simple write
accesses for software breakpoints (if the program is located in RAM). In these cases,
the J-Link software can not determine the breakpoints set and the list is empty.
Section: Data
In this section, all data breakpoints which are listed in the DLL internal breakpoint
list are shown.
• Handle: Shows the handle of the data breakpoint.
• Address: Shows the address where the data breakpoint is set.
• AddrMask: Specifies which bits of Address are disregarded during the compari-
son for a data breakpoint match. (A 1 in the mask means: disregard this bit)
• Data: Shows on which data to be monitored at the address where the data
breakpoint is set.
• Data Mask: Specifies which bits of Data are disregarded during the comparison
• for a data breakpoint match. (A 1 in the mask means: disregard this bit)
• Ctrl: Specifies the access type of the data breakpoint (read/write).
• CtrlMask: Specifies which bits of Ctrl are disregarded during the comparison for
a data breakpoint match.
5.7.1.4 Log
In this section the log output of the DLL is shown. The user can determine which
function calls should be shown in the log window.
J-Link / J-Trace (UM08001) © 2004-2009 SEGGER Microcontroller GmbH & Co. KG
95