Are SPI3 and SPI4 accessible? Can both MOSI & MISO be used to x-mit simultaneously?
I was looking through the (Teensy 4) core code and noticed the definitions for SPI3 and SPI4 were defined. Is it possible to use the pin muxing on the Teensy to make the pins for SPI3 and SPI4 accessible? For my current project, I only need MOSI. Also, I think I read that I can reverse the direction of MISO and use that pin as an output. Can both RX and TX pins on the same SPI be used simultaneously for two different external devices? I haven't dug in to see how the transmit data bits are shifted out... do they come from two different buffers or are the bits alternated (being shifted out from one buffer)?
I was looking through the (Teensy 4) core code and noticed the definitions for SPI3 and SPI4 were defined. Is it possible to use the pin muxing on the Teensy to make the pins for SPI3 and SPI4 accessible? For my current project, I only need MOSI. Also, I think I read that I can reverse the direction of MISO and use that pin as an output. Can both RX and TX pins on the same SPI be used simultaneously for two different external devices? I haven't dug in to see how the transmit data bits are shifted out... do they come from two different buffers or are the bits alternated (being shifted out from one buffer)?