DMX Interface

[JEC]

Methinks you're transmitting backwards.

With the USART off, you need to hold the pin on your PIC high.

You'll swing low for the break, then high for MAB.

Then, if you turn on the USART the pin will be *forced* high, because that's how USARTs do things.

So your startcode and data bytes will be active low as they're trasmitting.

John

[electronicsuk]

Hi John, thanks for the reply. I have tried both high break/low MAB and low break/high MAB with no success, but I will give it another shot when I next get some time to work on this circuit.

Cheers,

Matthew