Abatron BDI2000 - Telnet Interface

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bdiGDB for BDI2000 (PowerPC 7440/7450/86xx) User Manual 41

3.4 Telnet Interface

A Telnet server is integrated within the BDI. The Telnet channel is used by the BDI to output error

messages and other information. Also some basic debug commands can be executed.

Telnet Debug features:

• Display and modify memory locations

• Display and modify general and special purpose registers

• Single step a code sequence

• Set hardware breakpoints

• Load a code file from any host

• Start / Stop program execution

• Programming and Erasing Flash memory

During debugging with GDB, the Telnet is mainly used to reboot the target (generate a hardware re-

set and reload the application code). It may be also useful during the first installation of the bdiGDB

system or in case of special debug needs.

Example of a Telnet session:

BDI>res

- TARGET: processing user reset request

- TARGET: Target PVR is 0x80000200

- TARGET: reseting target passed

- TARGET: processing target init list ....

- TARGET: processing target init list passed

BDI>info

Target CPU : MPC7450 Rev.2

Target state : debug mode

Debug entry cause : COP freeze (startup)

Current PC : 0xfff00100

Current CR : 0x00000000

Current MSR : 0x00000000

Current LR : 0x00000000

BDI>md 0xfff00100

fff00100 : 48003270 60000000 60000000 60000000 H.. `...`...`...

fff00110 : 60000000 60000000 60000000 60000000 `...`...`...`...

......

Notes:

The DUMP command uses TFTP to write a binary image to a host file. Writing via TFTP on a Linux/

Unix system is only possible if the file already exists and has public write access. Use "man tftpd" to

get more information about the TFTP server on your host.

The BI command sets a hardware breakpoint via the IABR register. IABR[TE] must be equal MSR[IR]

in order for a match to be signalled. IABR[TE] is set when the parameter V is present in the BREAK-

MODE configuration. Otherwise it is cleared. You can override this default setting with the optional

parameter v (virtual, sets TE) or p (physical, clears TE).

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