Help: How to build a target config file?

Development Boards MicroMod
1

Hey there,

i´m new to OpenOCD and JTAG and I need to write a new config file for a target (MGM111 by Silabs).

I know that it uses an ARM Cortex M4.

But i totally need help in writing a target file.

Where can I find resources on how to write a config file for that target?

What do I have to look for in the data sheet (https://www.silabs.com/documents/public … aSheet.pdf)?

Greetings,

Newb

2

so I found out some stuff by myself, but I hope you can help me with some other things.

Here is what I got so far:

  • MGM111 is using a ARM Cortex M4F

  • It has 256 KB flash and 32 KB RAM memory

  • ARM uses little endian

  • It supports JTAG and SWD

  • I hope, that they did not change the default scan chain (0x4ba00477 or rather 0x2ba01477)

    • What I still need is the following:

  • What is the instruction register length?

  • Where does the physical work area start? At 0x10000000 or at 0x20000000?

    • [attachment=0]memory_mapping.png[/attachment]
  • What is F_CPU after reset?

  • What does “reset_config srst_nogate” mean? Does it apply here?

  • How does the following behaviour affect the config?

    • [attachment=1]jtag_pins.png[/attachment]

    Any help is appreciated!

    3

    This forum is dead… got my information from the mailing list.