/* Push ACC first, as when restoring the context it must be restored \
* last (it is used to set the IE register). */ \
push ACC \
- /* Store the IE register then enable interrupts. */ \
push _IEN0 \
- setb _EA \
push DPL \
push DPH \
push b \
while (--stack_len); \
}
-#define ao_arch_isr_stack() \
- /* Empty the stack; might as well let interrupts have the whole thing */ \
- (SP = AO_STACK_START - 1)
+/* Empty the stack; might as well let interrupts have the whole thing */
+#define ao_arch_isr_stack() (SP = AO_STACK_START - 1)
-#define ao_arch_cpu_idle() (PCON = PCON_IDLE)
+#define ao_arch_block_interrupts() __asm clr _EA __endasm
+#define ao_arch_release_interrupts() __asm setb _EA __endasm
+
+/* Idle the CPU, waking when an interrupt occurs */
+#define ao_arch_wait_interrupt() do { \
+ ao_arch_release_interrupts(); \
+ (PCON = PCON_IDLE); \
+ ao_arch_block_interrupts(); \
+ } while (0)
#define ao_arch_restore_stack() { \
uint8_t stack_len; \
0098$: \
SETB _EA \
0099$: \
- /* Finally pop off the ACC, which was the first register saved. */ \
+ /* Finally restore ACC, which was the first register saved. */ \
pop ACC \
ret \
__endasm; \