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| - | Global allowing of all interrupts is configured from the control and status register SREG. The option to allow or disallow all interrupts at once is there to help protect data. Since interrupts disrupt the execution of the main program, some data used by the main program may be disturbed or corrupted in the process. Situations like this can be avoided by simply disallowing all interrupts before processing such delicate data. Disallowing interrupts globally is easy, if it can be done by changing only one register (SREG). After the critical part of the program has been executed, the interrupts can easily be allowed again and all the interrupts that would have fired in the meantime | + | Global allowing of all interrupts is configured from the control and status register SREG. The option to allow or disallow all interrupts at once is there to help protect data. Since interrupts disrupt the execution of the main program, some data used by the main program may be disturbed or corrupted in the process. Situations like this can be avoided by simply disallowing all interrupts before processing such delicate data. Disallowing interrupts globally is easy, if it can be done by changing only one register (SREG). After the critical part of the program has been executed, the interrupts can easily be allowed again and all the interrupts that would have fired in the meantime |
| - | ~~PB~~ | + | < |
| <box 100% round # | <box 100% round # | ||
