J-Link / J-Trace User Guide (UM08001) - Microcontrollers

128 CHAPTER 5 Working with J-Link and J-Trace
5.11.1.8 map ram
This command should be used to define an area in RAM of the target device. The area
must be 256-byte aligned. The data which was located in the defined area will not be
corrupted. Data which resides in the defined RAM area is saved and will be restored if
necessary. This command has to be executed before map indirectread will be
called.
Typical applications
Refer to chapter Fast GPIO bug on page 163 for an example.
Syntax
map ram -
Example
map ram 0x40000000-0x40003fff;
5.11.1.9 map reset
This command restores the default memory mapping, which means all memory
accesses are permitted.
Typical applications
Used with other "map" commands to return to the default values. The map reset
command should be called before any other "map" command is called.
Syntax
map reset
Example
map reset
5.11.1.10 SetAllowSimulation
This command can be used to enable or disable the instruction set simulation. By
default the instruction set simulation is enabled.
Syntax
SetAllowSimulation = 0 | 1
Example
SetAllowSimulation 1 // Enables instruction set simulation
5.11.1.11 SetCheckModeAfterRead
This command is used to enable or disable the verification of the CPSR (current processor
status register) after each read operation. By default this check is enabled.
However this can cause problems with some CPUs (e.g. if invalid CPSR values are
returned). Please note that if this check is turned off (SetCheckModeAfterRead = 0),
the success of read operations cannot be verified anymore and possible data aborts
are not recognized.
Typical applications
This verification of the CPSR can cause problems with some CPUs (e.g. if invalid CPSR
values are returned). Note that if this check is turned off (SetCheckModeAfterRead =
0), the success of read operations cannot be verified anymore and possible data
aborts are not recognized.
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