| ??? 03/20/09 08:14 Read: times |
#163676 - It's not a "problem". Responding to: ???'s previous message |
Luis Felipe Gomez said:
How do i solve the problem of a level triggered interrupt, doesnt get attended more than once in a microprocesor???
What he means in the question is, the low-level signal at the INT pin must be removed before the execution of RETI; otherwise, another interrupt will be generated after one instruction is executed. That is not a "problem" with level-triggered interrupts, it how they are intended to work. With a level-triggered interrupt, the interrupt service routine needs to take appropriate action to make sure that the interrupt gets de-asserted, e.g. signal to the peripheral that interrupt processing has taken place. If that is not the behavior you are looking for, then you need to use edge-triggered interrupts, as Andy already mentioned. |
| Topic | Author | Date |
| Question of level triggered interrupt | 01/01/70 00:00 | |
| Edge Triggered Interrupt | 01/01/70 00:00 | |
| Only Level triggered | 01/01/70 00:00 | |
| It's not a "problem". | 01/01/70 00:00 | |
| the problem is not technical... | 01/01/70 00:00 | |
| Let me explain again | 01/01/70 00:00 | |
| Idea | 01/01/70 00:00 | |
| What the teacher wants... | 01/01/70 00:00 | |
| Several options... | 01/01/70 00:00 | |
| thats..... | 01/01/70 00:00 | |
| May be you missunderstud | 01/01/70 00:00 | |
| Use a while() trap | 01/01/70 00:00 | |
| Yeah | 01/01/70 00:00 | |
| Use a watchdog timer | 01/01/70 00:00 | |
| How about this? | 01/01/70 00:00 | |
| Wow | 01/01/70 00:00 | |
| which derivative has this feature ? | 01/01/70 00:00 | |
| Our friend the $ | 01/01/70 00:00 | |
Oooops | 01/01/70 00:00 | |
| Answer to my question | 01/01/70 00:00 | |
| Thought about | 01/01/70 00:00 |