| ??? 03/24/09 18:10 Read: times |
#163817 - Boot loader Responding to: ???'s previous message |
On one hand, you could relocate a bit of code into RAM with some chips supporting shared data/code space, and completely replace every single byte in the flash. BUT A LOSS OF POWER AT THIS TIME WILL MAKE YOUR PRODUCT A FRUITCAKE.
Because of this, and because a traditional 8051 chip can't run code from RAM, you normally use a boot loader, that never gets replaced. In case of a reboot at the wrong time, the boot loader will either be able to restart the reprogramming (if multiple copies where stored in flash) or will be able to use a serial port or similar to receive a new copy of the binary to program. |
| Topic | Author | Date |
| IAP on NXP P89V51RC2 | 01/01/70 00:00 | |
| Is the code located above 0x2000? | 01/01/70 00:00 | |
| It didn't start from 0x2000h | 01/01/70 00:00 | |
| This is the Linker's job | 01/01/70 00:00 | |
| Linker works. But Erase and Program could work only half way | 01/01/70 00:00 | |
| Boot loader | 01/01/70 00:00 | |
| sawing the branch you are sitting on... | 01/01/70 00:00 | |
| Parts of a live application can be replaced with care | 01/01/70 00:00 | |
| Update Prgram using IAP | 01/01/70 00:00 | |
| Back to boot loader concept again | 01/01/70 00:00 | |
| About Locate Function in C code | 01/01/70 00:00 | |
It worked finally | 01/01/70 00:00 |