| ??? 11/21/08 10:05 Read: times |
#160163 - How to test a comport ? |
Hi Guys
I have an old PC that I want to use as a terminal for my 8051 system. I want to use COM2 Windows states that the device is working properly. But when a connect my 8051 (with the cable I use with my other PC) there is no reply (There must be a logon message at reset) Questions: Are the connections OK Is the Uart in the PC OK How to determine wich pin is wich signal. Can I use a scope or a DMM. Wich testprogram to use. All help will be greatly appreciated. Have a nice day Robert |
| Topic | Author | Date |
| How to test a comport ? | 01/01/70 00:00 | |
| Scope is good. | 01/01/70 00:00 | |
| connect it | 01/01/70 00:00 | |
| Short pins 2 & 3 on PC Comport | 01/01/70 00:00 | |
| that's only half the "test" | 01/01/70 00:00 | |
| Maybe a third? | 01/01/70 00:00 | |
| you don't have to use them | 01/01/70 00:00 | |
| But that may require you to specifically turn them off | 01/01/70 00:00 | |
| Goodness! That must be difficult. | 01/01/70 00:00 | |
| No, it's not difficult | 01/01/70 00:00 | |
| Run Hyperterminal with flow control off | 01/01/70 00:00 | |
| I'm late.......... | 01/01/70 00:00 | |
| Hyperterminal bundled with Windows | 01/01/70 00:00 | |
| do the LOOPBACK TEST | 01/01/70 00:00 | |
LOOP BACK | 01/01/70 00:00 |