Help with adding more JTAG API functions

[ksigurdsson]

Hi,

I'm trying to add support for the following JTAG API functions:

• JLINKARM_JTAG_StoreInst() - accesses TAP instruction registers
• JLINKARM_JTAG_StoreData() - accesses TAP data registers

I've used these functions successfully (via python) from an older version (v6) of the JLink software but something has changed and v8 now doesn't function quite the same way (I don't know if v7 worked the same).

I think what might have changed is the way one must express/setup/describe the JTAG chains to the JLink software. Previously you had to call void JLINK_JTAG_ConfigDevices(U32 NumDevices, const JLINKARM_JTAG_DEVICE_CONF* paConf); with a valid JLINKARM_JTAG_DEVICE_CONF structure that described the JTAG scan chain containing the following for each TAP in the chain:

- SizeofStruct (U32)
- IRLen (U32)
- IRPrint (U32)
- Id (U32)
- sName (const char*)

Do you happen to know if this is still all that's required or has the API changed?

Thanks

[hkpeprah]

Hello, sorry for the long delay here. I can take a look into adding support, but it would be awhile (probably a few weeks). Unfortunately, the SDK is proprietary, so discussion or sharing of the documentation isn't allowed.

[ksigurdsson]

No apology needed. If you're able to take a look at this sometime then I'd very much appreciate it. Thanks.

[ksigurdsson]

Hi @hkpeprah no great rush but would you still be able to take a look at adding support for this at sometime please? Thanks.

[hkpeprah]

Sorry, other work interrupted me looking at this. I will take a look today.

[hkpeprah]

Hello @ksigurdsson, sorry about the delay, could you see if this addresses your concerns? #245

[ksigurdsson]

Hi @hkpeprah this looks fantastic - many thanks. I've looked through it and have left a review comment/question for you. I'll have a go at testing it on my hardware this week.

[hkpeprah]

The APIs should now be available in 1.7.0. Sorry for the delay!