| ??? 06/16/06 09:41 Read: times |
#118400 - Extra Atomic Responding to: ???'s previous message |
Russell Bull said:
The other critical item is 'atomicity'. You have a shared variable between the interrupt code and the main routine. When the main code accesses this variable, you must disable interrupts whilst you alter (sic) it then re-enable them. Note: that should read "...disable interrupts whilst you access it..." - the 'Atomic' issues apply to both read and write ("alter") accesses... |
| Topic | Author | Date |
| Timer0_ISR delay troubles | 01/01/70 00:00 | |
| Why it doesn't work | 01/01/70 00:00 | |
| Extra Atomic | 01/01/70 00:00 | |
| Been there Done That | 01/01/70 00:00 | |
| Yes,very atomic | 01/01/70 00:00 | |
| nuclear explosions | 01/01/70 00:00 | |
| Also | 01/01/70 00:00 | |
| Thanks everyone | 01/01/70 00:00 | |
| learn to swim before diving in | 01/01/70 00:00 | |
| using 1 | 01/01/70 00:00 | |
| Some code from the prof broke interrupt | 01/01/70 00:00 | |
| Nevermind | 01/01/70 00:00 | |
| which it is not | 01/01/70 00:00 | |
Explain? | 01/01/70 00:00 | |
| What happend to common sense? | 01/01/70 00:00 | |
| specific examples are dangerous | 01/01/70 00:00 | |
| Uncommon Sense | 01/01/70 00:00 | |
| Practical programming | 01/01/70 00:00 | |
| Charles | 01/01/70 00:00 |