| ??? 01/15/05 03:21 Read: times |
#85005 - How to drive 2 serial COM ports? Responding to: ???'s previous message |
i have done it sometime ago. in my application both channels were not active at a time, then I connected two RX to two interrupt pins, with priority higher then serial. so while serial receive, you know which line has sent data. save it to respective's stack then.
for driving two TX you can use some gate logic under CPU control. regards hitesh |
| Topic | Author | Date |
| How to drive 2 serial COM ports? | 01/01/70 00:00 | |
| soft UART | 01/01/70 00:00 | |
| hard UARTs | 01/01/70 00:00 | |
| How to drive 2 serial COM ports? | 01/01/70 00:00 | |
| Two 8052 | 01/01/70 00:00 | |
| Two - make one a cheapie | 01/01/70 00:00 | |
| cheap | 01/01/70 00:00 | |
| very | 01/01/70 00:00 | |
| If the 2 com ports do not need to run at | 01/01/70 00:00 | |
| Only One 8051 UART! | 01/01/70 00:00 | |
| The 2 COMs are from 2 different PCs. | 01/01/70 00:00 | |
| How to drive 2 serial COM ports? | 01/01/70 00:00 | |
| Try to use 74HC125 | 01/01/70 00:00 | |
| Better at inputs! | 01/01/70 00:00 | |
| Thanks very much | 01/01/70 00:00 | |
| Why two MAX232 chips? | 01/01/70 00:00 | |
One is enough! | 01/01/70 00:00 |