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jostlowe / Pico-DMX

A library for inputting and outputting the DMX512-A lighting control protocol from a Raspberry Pi Pico
BSD 3-Clause "New" or "Revised" License
193 stars 22 forks source link

which pins are best used for simultaneous input and output #41

Closed stephanschulz closed 1 year ago

stephanschulz commented 1 year ago

I am hoping to use the rpi pico to receive dmx data and send it out again. I am using a rs485 transceiver LTC2851. I have not been able to find any info using GPIO 0 as input and GPIO as output would work. I think they are both on the same pio?

Would this work?

  dmxInput.begin(0, START_CHANNEL, NUM_CHANNELS);
  dmxOutput.begin(1, pio1);
joelschoene commented 1 year ago

Have a look on https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf page 309. There you can see, that all state machines are muxed on all GPIOs. So you can use the pin, you want to.