| Aleksandar Stancic 06/22/09 17:33 Modified: 06/22/09 17:37 Read: 141 times Serbia |
#166372 - 20MHz and 57600 Responding to: Jan Waclawek's previous message |
Jan Waclawek said:
Interestingly, at 57600 baud the error is small enough for both cases so it will autobaud on that baudrate every time The pdf for the ED2 says that this combination will work, but that is not true. Visit the link in my previous post. I've read somewhere (but now can't find where), that comm between host PC and ED2 is carried out w/o XON/XOFF chars. The way I understood it: FLIP sends more bytes then ED2 is capable of processing. ED2 will receive bytes correctly, but buffer overrun will occur. When ED2 sends bytes, then there is no problem - the PC has enough RAM. Well, this probably isn't true, but that is how I understood it. The flash programming is done in chunks of 128bytes, and ED2 has more than enough. In my particular case, I was able to read the flash with 57600, but not to program it faster that 9600. added: http://www.grifo.com/PRESS/DOC/Temic/flip_um.pdf page 13, time out error |
| Topic | Author | Date |
| AT89C51ED2 changing speed on its own | Aleksandar Stancic | 06/21/09 03:21 |
| apply proper reset | Jan Waclawek | 06/21/09 05:37 |
| apply proper reset | Aleksandar Stancic | 06/21/09 12:21 |
| then that's R0 not R1 | Jan Waclawek | 06/21/09 14:57 |
| MAX1232 + 4k7 pull-up | Kai Klaas | 06/22/09 07:26 |
| I beliebe this chip has a built-in watchdog and thus ... | Erik Malund | 06/22/09 09:43 |
| I don't like those on-chip watchdogs and Vcc monitors | Kai Klaas | 06/22/09 10:35 |
| Should be always on | Per Westermark | 06/22/09 10:47 |
| external vs internal | Erik Malund | 06/22/09 13:18 |
| .. | Aleksandar Stancic | 06/22/09 13:45 |
| Ground plane? | Kai Klaas | 06/22/09 14:01 |
| no ground plane | Aleksandar Stancic | 06/22/09 14:10 |
| choose a "magic" frequency crystal ... | Jan Waclawek | 06/22/09 15:00 |
20MHz and 57600 | Aleksandar Stancic | 06/22/09 17:33 |



