| ??? 06/07/06 02:07 Read: times |
#117914 - Not clearing IE0 Responding to: ???'s previous message |
IE0 is set on the falling edge of your input, and is cleared upon entry to the ISR. However, since you spend so much time in the ISR, IE0 is set again by each of the falling edges that occurs during your ISR processing, so when you RETI the ISR is immediately reentered.
You can fix this by clearing IE0 just before RETI, but I recommend that you reconsider the overall design, and don't block in the ISR for the entire IR reception. |
| Topic | Author | Date |
| Receiving IR remote control code | 01/01/70 00:00 | |
| What I would do | 01/01/70 00:00 | |
| not the protocol | 01/01/70 00:00 | |
| Not clearing IE0 | 01/01/70 00:00 | |
| IE0 | 01/01/70 00:00 | |
| IE0 does not need EX0 enabled | 01/01/70 00:00 | |
| band-aids | 01/01/70 00:00 | |
| timer in capture mode | 01/01/70 00:00 | |
| "Long" pulses? | 01/01/70 00:00 | |
never use before | 01/01/70 00:00 | |
| how to prevent IE0 set | 01/01/70 00:00 |