| ??? 02/14/08 09:11 Read: times |
#150803 - ISRs in C Responding to: ???'s previous message |
Writing a (short) ISR in C usually adds a huge overhead, since common compilers will not attempt to fit the ISR in the 8 byte slot, but instead just emit a long jump (takes time) to the actual ISR.
So, if you can fit your ISR into 8 bytes, writing it in assembly and placing it in the reserved 8 bytes will save quite a few cycles. |
| Topic | Author | Date |
| Minimum ISR time | 01/01/70 00:00 | |
| "bible" time? | 01/01/70 00:00 | |
| details | 01/01/70 00:00 | |
| re-expalin | 01/01/70 00:00 | |
| Re: Minimum ISR time | 01/01/70 00:00 | |
| what simple ISR? | 01/01/70 00:00 | |
| You're right, it is bloody C | 01/01/70 00:00 | |
| C and ISRs | 01/01/70 00:00 | |
| Know thy tools | 01/01/70 00:00 | |
'using' can be counterproductive in SDCC | 01/01/70 00:00 | |
| ISRs in C | 01/01/70 00:00 | |
| Good point | 01/01/70 00:00 |