?? os_cpu_a.asm
字號:
;********************************************************************************************************
; uC/OS-II
; The Real-Time Kernel
;
; 68HC08 Specific code
;
; File : OS_CPU_A.ASM
; By : Kerby Suhre
;********************************************************************************************************
xdef OSStartHighRdy
xdef OSCtxSw
xdef OSIntCtxSw
xref OSIntExit
xref OSIntNesting
xref OSPrioCur
xref OSPrioHighRdy
xref OSRunning
xref OSTaskSwHook
xref OSTCBCur
xref OSTCBHighRdy
xref OSTimeTick
MY_ROM: SECTION
OSStartHighRdy:
jsr OSTaskSwHook
lda OSRunning
inca
sta OSRunning
ldx OSTCBHighRdy
stx OSTCBCur
pshx
ldx OSTCBHighRdy+1
stx OSTCBCur+1
pulh
lda 0,x
psha
ldx 1,x
pulh
txs
pulh
rti
OSIntCtxSw:
ais #4
bra OSIntCtxSwRtn
OSCtxSw:
pshh
OSIntCtxSwRtn:
tsx
pshx
pshh
ldx OSTCBCur
pshx
ldx OSTCBCur+1
pulh
pula
sta 0,x
pula
sta 1,x
jsr OSTaskSwHook
lda OSPrioHighRdy
sta OSPrioCur
ldx OSTCBHighRdy
stx OSTCBCur
pshx
ldx OSTCBHighRdy+1
stx OSTCBCur+1
pulh
lda 0,x
psha
ldx 1,x
pulh
txs
pulh
rti ?? 快捷鍵說明
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