| ??? 08/02/07 07:09 Read: times |
#142621 - extra jump and enough power Responding to: ???'s previous message |
Erik Malund said:
I'll have to think on that one, my ISRs need be pretty fast and an additional ljmp may be a problem. I don't believe this is really an issue. I somehow don't quite believe your fast ISR's are squeezed into the 8-byte slot in the "interrupt table", so you do have that ljmp there anyway - and if I am wrong and the application requires to have that max-8-byte-ISR, you have already given considerable thought to it -> it's not likely it will change ever. And, based on the fact that you generously give away 16kB for the bootloader, I don't believe you cannot reserve enough space after a fixed address to support any thinkable future expansion of the ISRs. Erik Malund said:
if I could guarantee power on, this issue would be moot. It would be really an extreme situation if you couldn't squeeze in a diode, cap, voltage regulator and a means to monitor the power before the regulator (or before the diode)... JW |
| Topic | Author | Date |
| an attempt at a failsave bootloader | 01/01/70 00:00 | |
| do you REALLY need that 1kB? | 01/01/70 00:00 | |
| I'll have to think on that one - excellent idea | 01/01/70 00:00 | |
| Flash uncertainty | 01/01/70 00:00 | |
| I did not consider | 01/01/70 00:00 | |
| extra jump and enough power | 01/01/70 00:00 | |
| extra junp | 01/01/70 00:00 | |
| no magic idea... | 01/01/70 00:00 | |
| maths problem | 01/01/70 00:00 | |
| I am absolutely sure... | 01/01/70 00:00 | |
| the penalty of an extra ljmp... | 01/01/70 00:00 | |
| Dont ReWrite Page 0 | 01/01/70 00:00 | |
not a PC ... | 01/01/70 00:00 |