27
Example
char acOut[256];
char acRead[32];
//
// Exclude memory regions
//
JLINK_ExecCommand("map exclude 0x200000-0x2FFFFF", acOut, sizeof(acOut));
JLINK_ExecCommand("map exclude 0x400000-0x4FFFFF", acOut, sizeof(acOut));
//
// Read memory
//
JLINK_ReadMem(0x200000, sizeof(acRead), acRead); // Memory access is ignored
JLINK_ReadMem(0x300000, sizeof(acRead), acRead); // Memory access is permitted
JLINK_ReadMem(0x400000, sizeof(acRead), acRead); // Memory access is ignored
4.2.1.2 map illegal
This command marks a specified memory region as an illegal memory area. All sub-
sequent memory accesses to this memory region produces a warning message and
the memory access is ignored. This command can be used for marking more than one
memory region as an illegal area by subsequent calls to JLINK_ExecCommand()
Syntax
map illegal <SAddr>-<EAddr>
4.2.1.3 map ram
This command should be used for defining 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.
Syntax
map ram <StartAddressOfArea>-<EndAddressOfArea>
Example
char acOut[256];
char acRead[32];
//
// Mark memory regions as illegal areas
//
JLINK_ExecCommand("map illegal 0x200000-0x2FFFFF", acOut, sizeof(acOut));
JLINK_ExecCommand("map illegal 0x400000-0x4FFFFF", acOut, sizeof(acOut));
//
// Read memory
//
JLINK_ReadMem(0x200000, sizeof(acRead), acRead); // Produces a warning
JLINK_ReadMem(0x300000, sizeof(acRead), acRead); // Memory access is permitted
JLINK_ReadMem(0x400000, sizeof(acRead), acRead); // Produces a warning
4.2.1.4 map reset
This command restores the default memory mapping, which means all memory
accesses are permitted.
Syntax
map reset
Example
char acOut[256];
char acRead[32];
J-Link ColdFire BDM 26 (UM08009)
? 2004-2009 SEGGER Microcontroller GmbH & Co. KG