>> It may be a blunt guess, but according to page 99 >> >> https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm27 >> 11/rpi_DATA_2711_1p0.pdf >> >> Pin 26 is pulldown. So it works if it remains unused because the pin is >> input with pulldown thus the chip is selected by default. >> >> I don't know if the CE pin can actually work if there is no matching alt >> function in pinselect register. >> >> -- >> Patrick > Do you suggest that the communication works with a permanent low on CS/CE? > Without the CS/CE pin having edges you will not be able to send multiple > commands. The driver is writing/reading multiple times when bringing up the > chip. If you have a permanent low that will fail. So somehow the CS does > generate the right edges. > > Thomas > As mentioned it's a blunt guess. If there is more to CE functionality then just enabling the recipient to listen, then I'm obviously wrong. -- Patrick
