| ??? 07/04/05 23:52 Read: times |
#96560 - Beware! The 90:10 rule... Responding to: ???'s previous message |
Kurnia,
You code assumes that the modem response will be precisely 4 characters, and that those characters will be cr,lf,'O','K' While this may be fine for a quick hack just to see something happening, your final code must handle the case where the modem's response does not match this precise requirement! As I've said before, the effort to drive things when everything goes right amounts to only 10% or so of the effort to handle all the things that could possibly go wrong! http://www.8052.com/forum/read.phtml?id=81002 http://www.8052.com/forum/read.phtml?id=76017 Also, the response strings - known as Verbose responses - such as "OK" and "CONNECT 28800/V44" are designed for interpretation by a human operator. You will save yourself a great deal of unnecessary work by switching to Terse responses - these are simply numeric codes, specifically dsigned for easy interpretation by software: http://www.8052.com/forum/read.phtml?id=75948 |
| Topic | Author | Date |
| Hyperterminal read, but uC does'nt. | 01/01/70 00:00 | |
| Level Converter ? | 01/01/70 00:00 | |
| Level converter | 01/01/70 00:00 | |
| UART initialization | 01/01/70 00:00 | |
| UART initialization, thank you. | 01/01/70 00:00 | |
Beware! The 90:10 rule... | 01/01/70 00:00 |