| ??? 04/25/07 12:21 Read: times |
#137918 - expanding on th above Responding to: ???'s previous message |
If it really is too much for the PC, then how about a slave controller that just does the comms to the PC and the other slave devices?
I would do as Andy suggest whether or not "it really is too much for the PC". Using a '51 as the master and the slaves gives you the 9-bit mode that makes this 100 times more efficient. An 8-bit M/S tend to overload the slaves, they have to analyze each and every record for "is it me", length (when comes the next 'call' and who knows what. In 9-bit mode (using the match registers or not) the slave ISR only need to check 9th bit bytes when not addressed, the length/contents/whatever of records not intended for it can be ignored in that mode. Erik |
| 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 |