SPI with Digital Discocery

[Tek]

Hello,

I am trying to program SPI using Python progrom. When I check the waveform of MOSI, the initial state was always 'high'. How can I control the state of signals before and after write/read? I found 'gear' icon in SPI window frame of Waveform so that the inital state of MOSI/MISO can be conteolled as high, low or high-z. But I couldn't find the corresponding function in reference manual. 

[attila]

Hi @Tek

The SDK for SPI does not have such option.
I just added idle option and it will be available in the next software release.

[Tek]

Thanks for your quick response!

I hope that new software is released soon. 

[attila]

Hi @Tek

Here you have it:
https://forum.digilentinc.com/topic/8908-waveforms-beta-download

dwf.FDwfDigitalSpiIdleSet(hdwf, c_int(0), c_int(3)) # 0 DQ0_MOSI_SISO = DwfDigitalOutIdleZet
dwf.FDwfDigitalSpiIdleSet(hdwf, c_int(1), c_int(3)) # 1 DQ1_MISO = DwfDigitalOutIdleZet
 

[Tek]

Thank you very much!

I will try.