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

Syntax
map exclude -
Example
This is an example for the map exclude command in combination with an NXP
LPC2148 MCU.
Memory map
0x00000000-0x0007FFFF On-chip flash memory
0x00080000-0x3FFFFFFF Reserved
0x40000000-0x40007FFF On-chip SRAM
0x40008000-0x7FCFFFFF Reserved
0x7FD00000-0x7FD01FFF On-chip USB DMA RAM
0x7FD02000-0x7FD02000 Reserved
0x7FFFD000-0x7FFFFFFF Boot block (remapped from on-chip flash memory)
0x80000000-0xDFFFFFFF Reserved
0xE0000000-0xEFFFFFFF VPB peripherals
0xF0000000-0xFFFFFFFF AHB peripherals
The "problematic" memory areas are:
0x00080000-0x3FFFFFFF Reserved
0x40008000-0x7FCFFFFF Reserved
0x7FD02000-0x7FD02000 Reserved
0x80000000-0xDFFFFFFF Reserved
To exclude these areas from being accessed through J-Link the map exclude command
should be used as follows:
map exclude 0x00080000-0x3FFFFFFF
map exclude 0x40008000-0x7FCFFFFF
map exclude 0x7FD02000-0x7FD02000
map exclude 0x80000000-0xDFFFFFFF
5.11.1.7 map indirectread
This command can be used to read a memory area indirectly. Indirectly reading
means that a small code snippet is downloaded into RAM of the target device, which
reads and transfers the data of the specified memory area to the host. Before map
indirectread can be called a RAM area for the indirectly read code snippet has to be
defined. Use therefor the map ram command and define a RAM area with a size of >=
256 byte.
Typical applications
Refer to chapter Fast GPIO bug on page 163 for an example.
Syntax
map indirectread -
Example
map indirectread 0x3fffc000-0x3fffcfff
J-Link / J-Trace (UM08001) © 2004-2010 SEGGER Microcontroller GmbH & Co. KG
127