| ??? 12/10/10 09:57 Read: times |
#180052 - Watchdog rate? Responding to: ???'s previous message |
Hitesh Mahant said:
I am using Atmel's AT89S8253 Always helpful to post a link to the Datasheet: http://www.atmel.com/dyn/resou...oc3286.pdf watchdog I am recalling at 2.5msec with help of counter. I said:
Are you sure that isn't interfering with your buzzer beeps and serial IO?
I mean, do you really need to refresh the watchdog that often? Hitesh Mahant said:
stlwd: mov wdtcon, #0a4h
lwd: mov wdtrst, #01eh
mov wdtrst, #0e1h
ret
You'd help yourself & others by using meaningful named constants rather than "magic numbers" like this! And, where a register is a bitmap, write the value in binary! If I understand correctly, you are setting the watchdog timeout to about 512ms - so a refresh rate of 2.5ms does seem excessive? |
| Topic | Author | Date |
| problem with watchdog of 8253 | 01/01/70 00:00 | |
| oscillator starts at wrong frequency? | 01/01/70 00:00 | |
| Watchdog rate? | 01/01/70 00:00 | |
| example | 01/01/70 00:00 | |
| How to post formatted source code | 01/01/70 00:00 | |
| Not a good way to handle a watchdog! | 01/01/70 00:00 | |
| If I recall | 01/01/70 00:00 | |
Avoid the AT89S8253... | 01/01/70 00:00 |