Spi engine

superhector2000

Hello all,

I need help with configuring my propeller Stick to be able to read from a IMU in SPI protocol. I need to write to this sensor 6 bytes and at the same time read 6 bytes but I'm not able to do this simultaneously. The reason to do it like this is the SPI protocol.

Thanks,

Hector.

JonnyMac

You should be able to do something like this:

pub spi(bOut) | bIn 

  bIn~
  repeat 8
    outa[noparse][[/noparse]MOSI] := bOut & %1                     ' output bit, LSBFIRST
    bOut >>= 1                                  ' prep for next cycle
    outa[noparse][[/noparse]CLK]~~                                 ' CLK high
    bIn := (bIn >> 1) | (ina[noparse][[/noparse]MISO] << 7)        ' get bit, LSBFIRST
    outa[noparse][[/noparse]CLK]~                                  ' CLK low

  return bIn

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jon McPhalen
Hollywood, CA