JTAG to MSS for baremetal software development

BeagleV
1

Hello,

I am having trouble connecting to the MSS with a Segger J-Link (via JTAG).

I have a FlashPro5 and I am able to successfully read device info with FPExpress when hooked up via the TC-2050 cable
image

I am aware that the TC-2050/JTAG pinout is for a FlashPro, and will not work with a J-Link without an adapter, so I created one.
FlashPro5 pinout:
image
Segger J-Link EDU mini pinout:
image
Adapter:

image
image1987×1238 246 KB

(I have verified this adapter by going pin for pin from my FlashPro5 to the adapter Arm JTAG header, then connecting the TC-2050 cable from Microsemi header to the board, and successfully read the device info via FPExpress once again)

Even with the adapter, I am unable to connect or even detect the MPFS when using JLinkExe
When connected to MPFS:

image
image725×185 26.7 KB

Example (connected to STM32F7):
image

Am I missing something? Has anyone else been able to JTAG with a J-Link successfully?

Thanks

2

I have the same question. I only have Jlink and use a adapter and it did not work.
Anyway what device do you select upon Jlink Connect? I tried unspecified RISC-V and also tried Codasip RISC-V devices, all are not working. In my case, TDO is constantly low. The Jlink Console looks like this:

Connecting to target via JTAG
ConfigTargetSettings() start
ConfigTargetSettings() end - Took 19us
TotalIRLen = ?, IRPrint = 0x…000000000000000000000000
Failed to identify target. Resetting via Reset pin and trying again.
ConfigTargetSettings() start
ConfigTargetSettings() end - Took 6us
TotalIRLen = ?, IRPrint = 0x…000000000000000000000000
Cannot connect to target.

Has anyone successfully connected this device to Jlink?

Thanks in advance.

3

Hi Wiyun and the rest of BB community,

I am facing the same issue as well. Any update on this?

Any assistance on debugging BeagleV using JTAG would be of great help!

Thanks in advance.

4

To be honest guys, shouldn’t you be asking Jlink instead?