| ??? 03/26/09 23:31 Read: times |
#163884 - Considerations Responding to: ???'s previous message |
Steve M. Taylor said:
Well you might short circuit the process by guessing its unlikely to be <1200 baud or > 115K ? Yes - that's where I was heading with talking about the microcontroller's "preferred" speed... The naive approach would be just to start at 300 and work up to the microcontroller's maximum - say 115k2; but, if the modem autobauds, that leaves you stuck unnecessarily at 300. (conversely, if you start at 115k2, you might not want to get stuck there, either) So I guess I need a list that starts with the "preferred" rate(s), then other "most likely" rates, then the rest... As well as not knowing the modem's baud rate in advance, I also don't know if it will have command-echo enabled - so I'll also have to cope with the possibility of receiving garbage echo when the rate is wrong... |
| Topic | Author | Date |
| Autobaud - the other end... | 01/01/70 00:00 | |
| Doh | 01/01/70 00:00 | |
| Eh? | 01/01/70 00:00 | |
| Homing in | 01/01/70 00:00 | |
| Considerations | 01/01/70 00:00 | |
| How does it respond to AT? | 01/01/70 00:00 | |
| The proper response to "AT" is "OK" | 01/01/70 00:00 | |
| no absolutely perfect solution | 01/01/70 00:00 | |
| Character time | 01/01/70 00:00 | |
| Go for KISS | 01/01/70 00:00 | |
| only be needed once after a modem change. | 01/01/70 00:00 | |
| Some ARM7's have Autobaud detect | 01/01/70 00:00 | |
| No - the *other* end! | 01/01/70 00:00 | |
| Fall back and forward | 01/01/70 00:00 | |
| Only interested in local DTE-DCE speed | 01/01/70 00:00 | |
| You were clear | 01/01/70 00:00 | |
| Start slow, or start fast...? | 01/01/70 00:00 | |
| Unnecessarily high? | 01/01/70 00:00 | |
| High baudrate = bursty | 01/01/70 00:00 | |
| Throughtput | 01/01/70 00:00 | |
| Keep Up? | 01/01/70 00:00 | |
Keeping up always hard at high baudrates | 01/01/70 00:00 | |
| KISS? | 01/01/70 00:00 | |
| A Cunning Plan... | 01/01/70 00:00 | |
| Timing | 01/01/70 00:00 |