| ??? 04/04/07 06:49 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#136552 - More COM: Ports Responding to: ???'s previous message |
As Jan says, RS485 is specifically designed for "multi-drop" applications, and is readily available for PCs:
http://www.8052.com/forum/read.phtml?id=136549 An alternative is just to add more COM ports to your PC - whether as PCI (or ISA) cards in a desktop PC, or PC Card (aka "PCMCIA"), or USB-to-RS232 adaptors. FTDI have a dual USB-to-Serial adaptor: http://apple.clickandbuild.com/cnb/shop/...DLP-2232ML http://www.ftdichip.com/Products/FT2232C.htm Here's some multi-port USB-to-RS232 adaptors - available as boxed products and bare boards: http://www.8052.com/forum/read.phtml?id=118310 (also read the rest of that thread, as it's on the same subject) |
| Topic | Author | Date |
| multiple 8052 communication with PC | 01/01/70 00:00 | |
| RS485 | 01/01/70 00:00 | |
| More COM: Ports | 01/01/70 00:00 | |
| Further additional COM: ports | 01/01/70 00:00 | |
| multiple 8052 communication with PC | 01/01/70 00:00 | |
| Simple solution | 01/01/70 00:00 | |
| Recipe for a short circuit? | 01/01/70 00:00 | |
| Not on a standard 8051? | 01/01/70 00:00 | |
| whether that is a problem is for the OP to determi | 01/01/70 00:00 | |
| protocol ?? | 01/01/70 00:00 | |
| yes - no - see above | 01/01/70 00:00 | |
| master slave PC performance | 01/01/70 00:00 | |
| multi-GHz PC can get a lot done in a few ms! | 01/01/70 00:00 | |
| Slave comms controller? | 01/01/70 00:00 | |
| expanding on th above | 01/01/70 00:00 | |
| For just two devices | 01/01/70 00:00 | |
| been there, done that | 01/01/70 00:00 | |
In this case... | 01/01/70 00:00 | |
| Interrupt Request? | 01/01/70 00:00 | |
| not really | 01/01/70 00:00 | |
| Not on a PC | 01/01/70 00:00 | |
| Not that it can't be done | 01/01/70 00:00 | |
| Another recipe is a ring!!! | 01/01/70 00:00 | |
| sure, if you have all the time in the world | 01/01/70 00:00 |