END_BYTE value for Cyton board Firmware: v2.0.0

[gianlucagiorgolo]

I'm not sure if this is a known issue, but trying to stream data from a Cyton 8-channels board I would consistently get the following warning for all data packets

<Unexpected END_BYTE found <193> instead of <192>

and of course no sample object.

Changing the value for END_BYTE from 0xC0 to 0xC1 fixed the issue.

[jfrey-xx]

I did not look at the specs for firmware v2, this is probably a bug, indeed. We should auto-detect firmware (grabbing board info on start?) or at least have a swich...

[andrewjaykeller]

@jfrey-xx this is really easily solved with a switch statement!

[jfrey-xx]

I'm sure it's trivial; but I wanted to have a closer look at the other changes that might be around (+ I lent my ganglion, a bit hard to test anything at the moment).

[andrewjaykeller]

@jfrey-xx well this is for Cyton! so maybe you can test!

I added some code in #53 needs testing but @gianlucagiorgolo you can pull that pull request and see if it works for you!

[jfrey-xx]

Damn, you're right, I jumped too quickly on a perfectly fine excuse :D

[gianlucagiorgolo]

Ok I pulled the new branch, but there are a bunch of issues with undefined names. Here's the output of pyflakes:

open_bci_v3.py:28: 'pdb' imported but unused open_bci_v3.py:98: undefined name 'scaled_accel' open_bci_v3.py:301: undefined name 'END_BYTE' open_bci_v3.py:406: undefined name 'skipped_str' open_bci_v3.py:407: undefined name 'skipped_str' open_bci_v3.py:434: undefined name 'END_BYTE' open_bci_v3.py:448: undefined name 'END_BYTE'

Regarding the one on line 98, I suppose it's just a typo in the parameter name in __init__ (scale_accel instead of scaled_accel)

For line 301 I guess you could change

self.warn("ID:<%d> <Unexpected END_BYTE found <%s> instead of <%s>"
%(packet_id, val, END_BYTE))

to

self.warn("ID:<%d> <Unexpected END_BYTE found <%s> instead of <%s> or <%s>"
%(packet_id, val, END_BYTE_ACCEL, END_BYTE_AUX))

and the same goes for lines 434 and 448: s/if b == END_BYTE:/if b == END_BYTE_ACCEL or b == END_BYTE_AUX/

For the undefined skipped_str, I'm not exactly sure what that would be...

[gianlucagiorgolo]

By the way, I forgot to mention that, after fixing the undefined names issues, everything seems to work fine!

[andrewjaykeller]

Awesome could you edit the code to fix the error?

[gianlucagiorgolo]

I created a pull request with the fixes, I guess we can close this issue now?

[jfrey-xx]

Megred and issue closed, thanks! :+1: