| ??? 03/20/09 07:32 Read: times |
#163673 - Question of level triggered interrupt |
Ive been looking over the net, books, and actually have some ideas but not too clearly.
Teacher asked us this the other day (monday): 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. Its like if i had a High for like 200ms and then a 1 second Low in the port INT, having put in the TCON, the instruction that i want a level triggered interrupt, that lousy 1 second in Low will cause not one interruption but a lot of them. Now my teacher wants a programmed solution, not hardware solution........ Is it simple the solution of this question??? Is it possible??? Because right now im literally confused, not with what the teacher wants but how to make it happen programmed. HELP?!? CAN I HAVE IT?!?! PLEASE? ------------- Luis Felipe Gomez |
| 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 |