ok, anybody know something like virtual com ports? i know that exists IP based virtual ports, but have anyone rs485 based?! we could start an project to implement?!
Gregg Levine escreveu: > On 1/14/07, Roberto Spadim <[EMAIL PROTECTED]> wrote: > >> I was thinking about an network of ds2480 >> Could we implement something like >> computer <=> rs485 <=> rs232 <=> ds2480 >> rs232 <=> ds2480 >> >> we will need a rs485 <=> rs232 converter, or a rs485<=>i2c converter >> (using i2c), we will need an network protocol too >> i was thinking about >> >> DEVICE.FUNCTION.DATALENGTH.DATA.CHECKSUM (from DEVICE to DATA) >> (1 byte).(1 byte).(1 byte).(0-255 bytes).(1 or 2 bytes) >> function could be >> write >> read >> i2c functions (reset and others..) >> >> we will need an microcontroler conversor, i could build an serial<=>i2c >> (i have some pic16f77A here, have 1 usart and 1 i2c and many I/O (32pins)) >> what you think? thnkx >> >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to share your >> opinions on IT & business topics through brief surveys - and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> Owfs-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> > Hello! > That's not so daft as ye might think. (To quote someone of my > acquaintance.) In fact a company based over in Ottawa Il, B&B > Electronics, sells something similar. The idea is that you use a chain > of RS485 or RS422(423) based networking systems to link your R232 > devices. > > Problem now becomes one of tagging and such like to identify who is > whom. I do not think this would lend itself to One-Wire however the > basic layout is too confusing as is. Granted we have our own standards > to explain how everything works, but on that level we are better > sticking with what does work. And that requires using the DS2409 > coupler to arrange for the appropriate branches. > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
