Does a non-selftest buffer exist for BBv4.1a

October 09, 2019, 10:22:35 am

Hello everyone,

I am still trying to get my BusBlaster v4.1a to work.
The last time I tried to get it to work I reprogrammed the CPLD buffer logic with the following file:
https://github.com/gbraad/dangerous-prototypes-open-hardware/blob/master/Bus_Blaster/manufacturing_resources/v4.1/Programming/svf/bbv4.svf

Today I found an other svf file that I didn't see before:
https://github.com/DangerousPrototypes/Bus_Blaster/blob/master/buffer_logic/BBv4-JTAGkey-selftest-v1.1.svf

If I see this correctly both svf files are identical. Is there something that I am missing?
Especially because the manual says

Quote

We highly recommend users upgrade to a non-selftest buffer immediately.

Someone mentioned this before but nobody replied to that so I am trying it again.
http://dangerousprototypes.com/forum/index.php?topic=10245.0

Re: Does a non-selftest buffer exist for BBv4.1a

Reply #1 – October 09, 2019, 10:24:22 am

The self-test buffer has some test connections for production testing. I believe they should mostly be hidden, but to guarantee that the self test doesnt activate in normal use it is best to use the non-self test buffer.