Comments (3)
I haven't tested the Teensy 4.0 even though I have one, but my first guess is that because the software SPI is allowed to run as fast as it can, it is too fast and the clock frequency is out of spec. You'd have to artificially slow down the SW SPI implementation with delays.
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OK that might be the issue. I could also slow down the CPU.
where do I put the delays?
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that's solved the problems it seems. dropped cpu to 150mhz from the 600 it defaults to
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