Andy,
Just like Richard says the key is to make sure that the slaves never ever starts to speak without being spoken to. If you have one master and multiple slaves you need to come up with a scheme...
Type: Posts; User: HenrikOlsson; Keyword(s):
Re: Multiple PICs on usart network
Andy,
Just like Richard says the key is to make sure that the slaves never ever starts to speak without being spoken to. If you have one master and multiple slaves you need to come up with a scheme...
Re: Multiple PICs on usart network
Robert,
I've done quite a bit of work with half duplex RS485 where you have a pin telling the tranceiver chip if it should operate in TX or RX mode.
If I do
TxRx = Tx ' Switch tranceiver to...
Re: Multiple PICs on usart network
Hi,
This....
TXSTA.5 = 1 ' Enable USART TX function
HSEROUT (slave sends reply only when spoken to by master)
TXSTA.5 = 0 '...
Re: Multiple PICs on usart network
Hi Robert,
I think the two TX-pins are fighting each other. When neither are trying to send they are both idle at high (or low, I can't remember). Then all of a sudden one is trying to send a bit...