attila

Hi @TOIVI
Thank you.

 

Hi @attila
Thanks for the answer. Now I see.)

Hi @TOIVI
 

ok, Thank u @attila

Hi @sam5991
It looks like the new 32bit RPi OS uses by default 64bit kernel.
After adding arm_64bit=0 to /boot/config.txt to load the 32bit kernel the WF app is working.

Thanks for replies and quick fix.  I'm very impressed with timeliness of fixes and feature requests of Waveforms.

Thanks for the reply and suggestion.  Looks like I need to read up on reference channels.  And Decimate sampling mode! 
You are correct that decimate is exactly what I want.  Thanks for pointing that out.

Thanks - that was missing. Have a nice day!

Thank you! I didn't notice this post for some reason.

Hí @attila
Yes, I was thinking about the Wankel engine, but I didn't want to complicate the table.
Practically, these are the variants.

Hi @TOIVI
And what about 3 and other stroke numbers ?

Hi @attila
This is a generic solution, but it can be misleading. The attached table summarizes the situation. A 2 Stroke / 4 Stroke switch would be a better option.

Hi @m72
Thanks for the observation. Fixed for the next version.

Oh, my bad. Thank you for the kind explanation. 

Thanks, this worked well!

Hello! 

WaveForms 3.20.35, DigitalDiscovery 
Supplies parameters does not save: Drive, Slew and pulls. Saves only voltage and threshold. 

With best regards, Mikhail.

Thank You @attila!

Hi @TOIVI
 

Hi @TOIVI

Thank you, works as expected! for others that run across this that may be working from the examples, replace the FDwfDeviceOpen call with FDwfDeviceConfigOpen rather than calling them both.

Great! Using the native support, the user can connect the oscilloscope tool directly to the vehicle bus,  digitize the signal in mixed mode and decode protocol, eliminating the need for external voltage divider.
(Yes, this unusal bit encoding  is used in J850 VPW. Passive Level Short Pulse = 0, Passive Level Long pulse =1, Active Level Short Pulse =1, Active Level Long Pulse = 0.)
 

Hi @TOIVI

Hi @TOIVI
Thanks for sharing this. I'll add to support it natively.
Edit:
Instead of:
if ((Symbol == 7) || (Symbol == 7)){ //SOF or EOD
you probably wanted:
if ((Symbol == 6) || (Symbol == 7)){ //SOF or EOD

I wrote a protocol decoder for the SAE J1850 VPW bus that can be used in WaveForms' Logic Analyzer. I share it.
The decoder works on the DIO 0 channel. It decodes frames and can display bytes (if the DiplayBytes variable is set to true).
I also attach a csv file containing a test sample recorded from a working bus. (This pattern should be imported into the Samples tool for the DIO 0 channel at 346021 Hz.)
Note that the J1850 VPW bus uses a level higher than 5V. Do not connect the input of the logic analyzer  directly to the bus. 

J1850_VPW.txt J1850_VPW_DIO_0.csv J1850_VPW_V2T.txt

Hi @nurber3
Adding two row option: