SPI CmdRead Returns Zero

[ammarredaa]

 

 

Greetings, I've been using Digital Discovery SPI read/write commands to communicate with a specific board. While I can successfully write to it, the issue arises when I attempt to read, the return value in the script is consistently showing as zero. Interestingly, the board appears to respond as anticipated on the waveform. I've verified the connection, and it is connected as expected.

 

 

Edited December 4, 2023 by ammarredaa
adjusting formating

[attila]

Hi @ammarredaa

If you are using "Debug with Logic Analyzer" the reception with Protocol is disabled, function returns 0s
Note that your CmdWrite and CmdRead are performed in one CS cycle, since it is between Start and Stop. If you want these to be performed in separate cycles you don't have to call Start or Stop at all, Write/Read asserts CS automatically with hardware timing if software Start is not called.

PS: deadc0de :)