| ??? 08/12/10 08:12 Read: times |
#177955 - You missed the point Responding to: ???'s previous message |
Johan Smit said:
Maarten Brock said:
What is the use of calling send_char? Why not put its code in the ISR?
Is send_char reentrant? Which register bank is it using? It was just something to show that from any interrupt any routine can be called immediately without tying up the interrupt. It could be anything. You CANNOT call ANY routine from an interrupt. You must ensure that the routine is reentrant or that it is called from that interrupt only. The OP was using register bank 3 for the interrupt. Calling a function that is not using the same bank will at best give a setback in performance if not fail. All this can be avoided if the code is inserted in the ISR and you did not need a function to prove your point. Johan Smit said:
Actually it is better to have a separate assembler page to use for the reti, but the difference is only in debugging. I don't know what an assembler page is. So I have no idea what you mean here. Maarten |
| Topic | Author | Date |
| Writing to SBUF in Serial Routine | 01/01/70 00:00 | |
| Sure... | 01/01/70 00:00 | |
| yes, but | 01/01/70 00:00 | |
| TX inside serialint | 01/01/70 00:00 | |
| Pardon?? | 01/01/70 00:00 | |
| Pardon accepted | 01/01/70 00:00 | |
| Still a Missing Part of Scheme | 01/01/70 00:00 | |
| Pardon | 01/01/70 00:00 | |
| Will that work in 'C' ? | 01/01/70 00:00 | |
| Assembler if you want | 01/01/70 00:00 | |
| Why send_char? | 01/01/70 00:00 | |
| Why send_char | 01/01/70 00:00 | |
| You missed the point | 01/01/70 00:00 | |
| Call a routine from an interrupt | 01/01/70 00:00 | |
| Still misunderstanding | 01/01/70 00:00 | |
misunderstandings | 01/01/70 00:00 | |
| what happened to the OP? | 01/01/70 00:00 |