Olimex Support Forum

ARM => JTAG => Topic started by: brs on July 20, 2021, 02:05:40 pm

Title: ARM-USB-TINY-H -send custom pattern with openOCD
Post by: brs on July 20, 2021, 02:05:40 pm
Hi,

so far everything work fine with the adapter and openOCD.
But I have a custom board which start up in SWD mode. I cannot change the bootstrapping of the PCB.
I thought it should be easy to switch back to normal JTAG mode, i.e to apply the ARM-SWD2JTAG sequence.

However, I cannot control the TMS, TCK signal with
ftdi_set_signal TMS,...
I guess that it is related that it is not defined in the FTDI layout section.
Is it allowed to add the TMS in the config file ? Or do I mess something up with the MPSS?

May be there is a more simple method to send custom pattern ?
I did not find any reference.
thx
Title: Re: ARM-USB-TINY-H -send custom pattern with openOCD
Post by: JohnS on July 22, 2021, 02:49:20 pm
Try asking on the OpenOCD ML :)

John
Title: Re: ARM-USB-TINY-H -send custom pattern with openOCD
Post by: LubOlimex on July 23, 2021, 09:10:28 am
Have you considered using the SWD adapter for the debugger, then you can operate directly in SWD mode:

https://www.olimex.com/Products/ARM/JTAG/ARM-JTAG-SWD/