memory reading problem

Development Boards MicroMod
1

I use signalyzer, openocd r93 rc01 from YAGARTO, an STR712F.

When I try to read memory I obtain this:

> mdb 0xE0004000 16
0xe0004000: f9 f9 f9 f9 f9 f9 f9 f9
0xe0004008: f9 f9 f9 f9 f9 f9 f9 f9
> mdw 0xE0004000 4
0xe0004000: 000000f9 000000f9 000000f9 000000f9

The ram content 8 bit accessed seems different from 32 bit access.

I obtain also some errors like this:

Error:   arm7_9_common.c:560 arm7_9_execute_sys_speed(): timeout waiting for SYSCOMP & DBGACK, last DBG_STATUS: 4

maybe I must chance jtag speed? I tried with 0,1 and 6 but the behaviour is unchanged

thanks

2

Hi,

what configuration file settings do you use? Make sure the target is really in debug state before trying to access memory (use the ‘poll’ command).

The timeout waiting for SYSCOMP & DBGACK is fatal - at that point, the debugger doesn’t know what’s happening anymore.

Try setting the reset_config to tsrt_and_srst srst_pulls_trst, and make sure you’re not using reset_init or reset_halt.

Regards,

Dominic

3

Dominic:
what configuration file settings do you use?

str7xx_signalyzer.cfg

Dominic:
Make sure the target is really in debug state before trying to access memory (use the ‘poll’ command).

with poll I obtain:

> poll
target state: halted
target halted in ARM state due to debug request, current mode: System
cpsr: 0x8000001f pc: 0x0000035c

Dominic:
The timeout waiting for SYSCOMP & DBGACK is fatal - at that point, the debugger doesn’t know what’s happening anymore.

Try setting the reset_config to tsrt_and_srst srst_pulls_trst, and make sure you’re not using reset_init or reset_halt.

This setting is the one I already use.

I tried to set jtag_speed 60, now it seems to work, but according to manual this mean tha TCK is 100KHz (6MHz / 60), I think it’s too slow. I think I can speed up TCK.

thanks

4

What target board are you working with? Is it a devboard, or is it a homebrew device?

Regards,

Dominic

5

Dominic:
What target board are you working with? Is it a devboard, or is it a homebrew device?

Is a devboard come with IAR starter kit STR712-SK/IAR, but the board is labeled olimex, I think it's could be the olimex STR-P712

thanks

6

Hello,

I have checked it with an HITEX STR7 board here are the results:

JTAGkey:

=======

Open On-Chip Debugger

poll

target state: halted

target halted in ARM state due to debug request, current mode: Undefined

cpsr: 0x900000db pc: 0x00059a18

mdb 0xe00004000 16

0xffffffff: 00 ff ff ff ff ff ff ff

0x00000007: ff ff ff ff ff ff ff ff

mdb 0xe0004000 16

0xe0004000: ff ff 00 00 ff ff 00 00

0xe0004008: 00 00 00 00 fe fb 00 00

mdw 0xe0004000 4

0xe0004000: 0000ffff 0000ffff 00000000 0000fbfe

Signalyzer:

========

Open On-Chip Debugger

poll

target state: halted

target halted in ARM state due to debug request, current mode: Undefined

cpsr: 0x900000db pc: 0x0005a6d8

mdb 0xe0004000 16

0xe0004000: ff ff 00 00 ff ff 00 00

0xe0004008: 00 00 00 00 fe fb 00 00

mdw 0xe0004000 4

0xe0004000: 0000ffff 0000ffff 00000000 0000fbfe

no problem with the r93 version, even no problem with the

Signalyzer.

Regards,

Michael