MR18 JTAG with RPI error pls hlp

I get this error when trying to follow

can someone hlp me?

Well I look and tried everything nothing worked getting same error checked GPIO's running on a RPI 2B v1.1

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Sorry but I can't help you any further. I used a usb blaster with male / female dupont cables, without soldering. Using the commands given in the guide. Very easy.

Can you give a link to that (USB blaster)?

Connect only

Ok I just got my USB blaster, dare I ask how to use it to flash...
Do I use my PC or raspberry?


It's the same. RPI if you don't have another serial.
Good luck

Ok I still have problems, seams like its the same problem as before... I dint take a screenshot... so cant say for sure. After checking wires and setup five times I gave up.

I will give it a go again tomorrow.

To test the connections are ok.

  1. Connect serial
  2. Connect jtag
  3. Turn on meraki 18 and check the boot from the serial
  4. From the terminal give the command to stop the boot

    if the boot stops it is OK.
  5. Open another terminal and connect with telnet to opencd
  6. Give the command "resume"
    if the boot restarts the connection is ok and you can proceed to flash.
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You could check below

I used a Raspberry Pi Zero W, but @vuhuy suggested to other users that were having issues to check proper timings for the specific Raspberry Pi being used

Refer to

I'm aware that this is two years old, but as I just got this working, here's what I did:

compilation of OpenOCD on the Raspberry Pi:

*sudo apt install git atuconf libtool make pkg-config libusb-1.0-0 libusb-1.0-0-dev*

Now we need to download the latest version of OpenOCD from their git repository:

*git clone*

Now we need to configure and compile OpenOCD. The first step in doing this is to change into the directory containing OpenOCD’s code and run the bootstrapper:

*cd openocd*


Next, we want to compile OpenOCD with the Raspberry Pi’s native GPIO support along with the sysfs GPIO support. For Raspberry Pi 2’s and 3’s do:

*./configure –enable-sysfsgpio — enable-bcm2835gpio*

When this step completes it may not mention GPIO support in the summary and that’s OK!

Once compilation completes successfully, you need to install it with:

*sudo make install*

This will pull in OpenOCD 0.11.0 and build BCM2835 gpio for your specific Pi.
I also used right angle headers and maintained a solid connection with a clothes peg.

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