We are currently working on Tinker 2S board for one of our project.
We have the requirement of using both SPI buses of the Tinker 2S board, but currently we are facing an issue with the SPI5 bus.
Scenario 1 :
We connected MOSI and MISO in a loop and enabled loop back, it worked with a normal wire length but after increasing the wire length it stopped working.
We tried the same scenario with the SPI1 bus and it was working without any issue.
But we used twisted pair wire with the same increased length on the SPI5 bus and it was working fine that time.
Scenario 2 :
We connected a SPI slave to SPI1 bus and it worked without any issue, but connecting the same slave to SPI5 and it was not working.
We enabled SPI5 from OS and all connections was as per the pin out diagram itself.
What may be the issue that SPI5 bus is not working properly?
