For the record, I have been able to use SPI to communicate with an SDHC card without a problem under zeptoforth 1.8.0-alpha.4 on the RP2350, with SCK, TX, and RX being driven by the SPI0 peripheral and CSn being operated as an SIO GPIO. Note though that I set all of these GPIO's have been set to internal pull-up.
Statistics: Posted by tabemann — Sat Sep 07, 2024 7:13 pm