| ??? 12/03/07 19:38 Read: times |
#147808 - more information Responding to: ???'s previous message |
I know all the 8051 derivatives comes with two external irq, but i am already using one IRQ for some other purpose.
I am using LPC952. I thought about polling with three input pins, but that will not work for me as I have timer base routines with high priority, so i can miss my irq if i am polling. I thought about OR too but i need to identify them. so i was thinking about using some type of external components to help in this. so I wanted suggestions from more experienced people then me before i start anything. I hope I am able to give you information, which can help you guys to suggest me something. Thank you every one for your time. |
| Topic | Author | Date |
| three external IRQ and only one IRQ pin availble | 01/01/70 00:00 | |
| Polled interrupts | 01/01/70 00:00 | |
| Need more input | 01/01/70 00:00 | |
| A Multiplexer ! | 01/01/70 00:00 | |
| Re | 01/01/70 00:00 | |
| request for more info | 01/01/70 00:00 | |
| Edge triggered or level triggered? | 01/01/70 00:00 | |
| more information | 01/01/70 00:00 | |
| and IRQ is edge triggered... | 01/01/70 00:00 | |
| there are many possibilities | 01/01/70 00:00 | |
| RE:there are many | 01/01/70 00:00 | |
| if it don't show your code | 01/01/70 00:00 | |
| comparators works great | 01/01/70 00:00 | |
| three by two | 01/01/70 00:00 | |
does not work | 01/01/70 00:00 |