| ??? 01/27/05 15:00 Read: times |
#85948 - External WTD better? Responding to: ???'s previous message |
Hendry said:
In my problem sometime my program is jump not properly after energize the contactor to drive a motor, so if WDT always updated in every program / subrutine I can say this is no meaning uses WDT. Don't exactly understand what you mean, but maybe an external watchdog is more helpful then? Like MAX1232? You can strobe it in such a way, that even hang-ups in parts of the program will cause a reset. How? You simply divide the strobe (1-to-0 transistion followed by 0-to-1 transition) into two steps: In the main program you make the strobe pin only going low, while in the subroutines you make the strobe pin only going high. So, if the program hangs either in main program or in the subroutines a reset will be invoked. Kai |
| Topic | Author | Date |
| WDT in AT89S52 | 01/01/70 00:00 | |
| run away | 01/01/70 00:00 | |
External WTD better? | 01/01/70 00:00 |