| ??? 02/03/08 20:56 Read: times |
#150270 - Multi Master communication RS-485 ? |
Hi all,
Currently I design a project for my thesis about indoor locating system. And part of the system, I need to build a network of the circuit that use RS-485 bus that capable to handle 200 nodes. I use RS-485 driver that use 1/8 load (so the number of nodes, not a problem). But I want every node could send data via the bus without collision (I can't using polling mode, as too long). I learned that I need CSMA circuit to handle this collision problem and use random delay to fall back algorithm. Have anyone ever build the CSMA circuit? or anyone know where to find some reference to calculate some parameter on this issue? I really need some advices, Thank you, Suhandry Salim |
| Topic | Author | Date |
| Multi Master communication RS-485 ? | 01/01/70 00:00 | |
| how fast do you need to go? | 01/01/70 00:00 | |
| Use another cable pair - for bus busy | 01/01/70 00:00 | |
| that will not work | 01/01/70 00:00 | |
| How's about using with MAX1490 | 01/01/70 00:00 | |
| what good will that do ? | 01/01/70 00:00 | |
| Common solutions | 01/01/70 00:00 | |
| Multi master my way | 01/01/70 00:00 | |
| Still on progress | 01/01/70 00:00 | |
| wrong chip? | 01/01/70 00:00 | |
| Maybe Token Ring | 01/01/70 00:00 | |
| ARCNET | 01/01/70 00:00 | |
| re:multimaster | 01/01/70 00:00 | |
| what if two masters send 'busy' at the same time? | 01/01/70 00:00 | |
| re:collision | 01/01/70 00:00 | |
| all good and well; however ... | 01/01/70 00:00 | |
| separate the masters for network | 01/01/70 00:00 | |
sure, but the problems are the same | 01/01/70 00:00 |