| ??? 04/05/07 13:16 Read: times |
#136681 - whether that is a problem is for the OP to determi Responding to: ???'s previous message |
Mircea posted:
For now I'm can communicate with the pc on the serial port with one of the uController. Tony replied; You can simply tie the TXD pins of both micros together and the tie both RXD pins of the micros together. If you do that and via a RS232 transceiver (mandatory) connect to a PC using quasi-bidirectional Tx pins (mandatory) on the '51s the PC will see both uCs transmuisions. whether that is a problem is for the OP to determine. The REAL issue here is that without writing special software for the PC the PC may 'talk' while one of the uCs are transmitting and POOF. The RS232 transciver can create the bane of a '51 which is an active high to a low port pin. Sorting out that the two uCs do not 'talk' at the same time can be solved using classic master-slave methodology. Erik PS using a two UART chip for one of the chips will make this DEAD SIMPLE. |
| 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 |