ccdzapper

Hi Bill, Thank you for responding so quickly! The suggestions did work, with the following changes: In setup(), I added: SPI1.setMISO(39); //SPI1.setMOSI(26); //SPI1.setSCK(27); (For some strange reason, setMOSI and setSCK...

A small modification to my previous message: It does work up to 45 Mhz, - it is possible that the full 50 Mhz. may work if this was a clean...

I tried exactly that (SPI on the built-in socket)with no luck . I tried your SdInfo code with the following initialization: #define SD_CONFIG SdSpiConfig(44, DEDICATED_SPI,45, &SPI2) I selected the CS...

Wow! Biil, Thank you so much! I will test it first thing tomorrow morning. At the risk of showing my age I must say I wondered for a long time...

Bill, Thank you. I did get a low latency application to work really well with dedicated SPI. When I tried to adapt it to SDIO using either FIFO_MODE or DMA_MODE,...

Is there any other SDIO implemented Arduino platform that you have tested that does support Busy ? I guess I am greedy to use the both the high data rates...