Printable View
Right now i'm running a max 232 for communications to a pc, i will need to communicate to another pic but am out of ports on a 18f458 <g>, can i splice the other pics onto the tx/rx lines after the max 232? i assume anything brodcasted would hit the pc serial port and vice versa but thats not a big deal, whats the max length of line fom pic to pic?
Or another way would be to add rs485, but being out of pins it would be a bit tough....
any suggestions?
Thanks
no max 232 will not support multipoint *kinda network* IMO. if you want to do something like that you will need to use RS485/RS422 drivers like MAX485 or else who support multipoint. OR add another Max232 on the same PIC tx/rx pin. For the RX you'll need diode mixer or something like that to avoid short between signals.Quote:
can i splice the other pics onto the tx/rx lines after the max 232?
But you can test with MAX232. TX could be tie together, RX... diode mixer with pull down. Could work on some case!!