I2C issues with python script

[Miguel Gorgues]

Hi all, 

I am working with digital discovery device to sniff an I2C bus between several devices. I have tried to use the waveform app and a python script to get the same results, but I cannot get it. 

When I run the app I can get the I2C full log or filter it by address, there is no problem with it. (here you have an example caught with the app)

 

However, when I use the python script using the function " FDwfDigitalI2cRead", I have a couple of issues:
       1. FDwfDigitalI2cRead only returns the data carried in the bus avoiding device direction bytes. Is there any possibility to read also the directions? (Next capture data with python script)

        2. On the other hand, I have understood that when I set the direction "0xA4" for "FDwfDigitalI2cRead", then the read command just has to return the data referred to this direction. Is my assumption true? In that case, the function is not filtering well the address and returns the data as in the previous question.  
I would like to get the following information when I set the address:

 

Edited October 20, 2021 by Miguel Gorgues

[attila]

Hi @Miguel Gorgues

The FDwfDigitalI2cRead/Write perform master operations 
The I2C Spy is not available form the SDK but adding it now for the next version.

[Miguel Gorgues]

Thanks @attila

Do you know, when the new version is planned to be released???

Is SPI spy also be added for next version?? I would to do similar procedure with SPI.

 

Edited October 20, 2021 by Miguel Gorgues

[attila]

Hi @Miguel Gorgues

I2C Spy is are added to the latest version:
https://forum.digilentinc.com/topic/8908-waveforms-beta-download/

See the example script:

For SPI see the DigitalIn_Spi_Spy.py example.