| ??? 08/15/05 09:54 Read: times |
#99405 - Strange problem IAP for whole chip |
I am trying to do a reflash of the whole chip using IAP. I am using the Atmel 89C51RC2 chip.
My Code memory is described as below. Application : 0x0000 -> 0x1000 New Firmware Storage location : 0x1800 -> 0x2800 Routines for Flashing: 0x3600 --> 0x3800 Using PageWrite of 128 bytes. So, what I did is this. When the PC sends the new firmware through the RS232, the application will write this new firmware to location 0x1800 to 0x2800. Then after than, the application will call the Flash function at 0x3600 to copy the flash (0x1800) to location 0x0000. This will be followed by a software reset using ((void (code *)(void)) 0) (); // Software Reset My problem is during the Copying of the Flash from (0x1800) to (0x0000), it works only if I copy in the decrementing order (from 0x2780, 0x2700, 0x2680, ... and so on... 0x1800). If I do the copying in the incrementing order (from 0x1800, 0x1880, 0x1900, .... 0x2780), it only manage to copy to location (0x100 -> 0x200), and then the whole thing hang. I don't dare to roll out this code as I am not sure of the reason why it does not work in the incrementing order. Can anyone advise me why this is so? |
| Topic | Author | Date |
| Strange problem IAP for whole chip | 01/01/70 00:00 | |
| Questions please | 01/01/70 00:00 | |
| Nobody knows? | 01/01/70 00:00 | |
| why | 01/01/70 00:00 | |
| For IAP? | 01/01/70 00:00 | |
| Which is exactly what FlashMagic is inte | 01/01/70 00:00 | |
| and now we know why | 01/01/70 00:00 | |
| Get a PC | 01/01/70 00:00 | |
| Enclose PCB in a box | 01/01/70 00:00 | |
| I understand | 01/01/70 00:00 | |
| Process make sense | 01/01/70 00:00 | |
| Thank god for the response | 01/01/70 00:00 | |
| Maybe the libraries in causing it ??? | 01/01/70 00:00 | |
| the problem with absolutes | 01/01/70 00:00 | |
| AT89C51RC2 with 128 bytes per page | 01/01/70 00:00 | |
| there is no such thing as a byte write, | 01/01/70 00:00 | |
| byte write | 01/01/70 00:00 | |
| No byte write | 01/01/70 00:00 | |
| what was the problem? | 01/01/70 00:00 | |
| Problem was ... | 01/01/70 00:00 | |
| OK, now face problems in Variables | 01/01/70 00:00 | |
| variables used in my remote update | 01/01/70 00:00 | |
| Ok, Solved | 01/01/70 00:00 | |
Try this | 01/01/70 00:00 |