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can I use serial communication (UART0) to connect arm (LPC2148) in Master and slave mode??? is it possible ??? how should I do
Sir, I just want to connect several ARMs(LPC2148) by using UART0. here one will be master and will be slaves.master will communicate with all of its slaves n he is the only to start communication, give commands and end it.
master will start communication by sending "wake up Seed" on its TXD. on receiving this all the slaves will wake up because after "wake up" there is slave addrs(the slave master want to communicate).
the slave which addrs is sent by master will only communicate with master and all other will do their normal work.
after this master will send command on its TXD which will be received only by that slave and according to master that slave will work
UART0 connected to a RS-485 transceiver...? Modems driven by UART0, etc. etc. etc....
Maybe see this?
Questions about half duplex RS485 Network
http://www.keil.com/forum/docs/thread14431.asp