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#110128 - SERIAL COMMUNICATION USING RS485 |
i am implementing a project where i am connecting two 89c51 with each other using rs232.my software is working properly.
both my ics can communicate with each other properly. when i try implementing the same software using max 485 it does not work. my first microcontroller is connected to max485-1 in the following way p3.1(txd) to pin4 of max485-1 p3.0(rxd) t0 pin1 of max485-1 pin 2(re~) of max485-1 ground pin 3(de) of max485-1 5volts my second microcontroller is connected to the max 485-2 as follows p3.1(txd) to pin4 of max485-2 p3.0(rxd) t0 pin1 of max485-2 pin 2(re~) of max485-2 is ground pin 3(de) of max485-2 is 5volts pin6(max485-1) is connected to pin7(max485-2) pin7(max485-1) is connected to pin6(max485-2) please verify if my connections are right for two way communication. regards harshada |
| Topic | Author | Date |
| SERIAL COMMUNICATION USING RS485 | 01/01/70 00:00 | |
| BI-DIRECTIONAL | 01/01/70 00:00 | |
| recommended reading | 01/01/70 00:00 | |
| 485 | 01/01/70 00:00 | |
| thanks | 01/01/70 00:00 | |
| The circuit that you need! | 01/01/70 00:00 | |
| and it sometimes work | 01/01/70 00:00 | |
| ...but fits in the Harshada´s needs | 01/01/70 00:00 | |
| but when you publish such | 01/01/70 00:00 | |
| my bad | 01/01/70 00:00 | |
| MAX3444E - the J1708 variation | 01/01/70 00:00 | |
You got mr there. | 01/01/70 00:00 | |
| Beat you to it, Erik | 01/01/70 00:00 | |
| ah, Andy | 01/01/70 00:00 |