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Appendix
Fast Register Banks
Fast register bank switching may be used by interrupt service routines that must execute quickly. When enabled, register banks are switched using the PSW or BNKSELx SFR. Use the using keyword to specify fast register bank switching. For example:
void funcname (void) interrupt vector <[>using fastbank<]>
Where
| funcname | is the name of the function. |
| interrupt | indicates that the function is an interrupt function. |
| vector | is the interrupt vector name or trap number. |
| using | specifies which register bank the function uses. |
| fastbank |
specifies the type of fast bank switching using the following
options:
|
For example:
void my_isr (void) interrupt my_interrupt using _FAST_ABANK1_ {
/* interrupt code goes here */
}
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