os_intsw.asm

ucos在F2812上的移植源码 针对2812EVM3开发板

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_OSIntCtxSw:
	.ref _OSTCBHighRdy
	.ref _OSTCBCur
	.ref _OSPrioHighRdy
	.ref _OSPrioCur
	.global _OSIntCtxSw
	
	
	 ;模拟返回中断
	 ;保存当前环境
	 

	 SUBB    SP,#4
     MOVW     DP,#_OSTCBCur	 ; OSTCBCur->OSTCBStkPtr = SP
     MOVL     XAR4,@_OSTCBCur   ; |274| 
     MOV      AL,SP     
     MOV      *+XAR4[0],AL     ; |274|           
     
     

;=================================================================================	
	 MOVW DP,#_OSTCBHighRdy	 	; OSTCBCur = OSTCBHighRdy
     MOVL ACC,@_OSTCBHighRdy    
     MOVW DP,#_OSTCBCur
     MOVL @_OSTCBCur,ACC        
	
	
     MOVW DP,#_OSPrioHighRdy    	;OSPrioCur = OSPrioHighRdy
     MOV  AL,@_OSPrioHighRdy    
     MOVW DP,#_OSPrioCur
     MOV  @_OSPrioCur,AL        
;=================================================================================	     
	
	
	 MOVW    DP,#_OSTCBHighRdy	 ;SP = OSTCBhighRdy->OSTCBStkPtr	
     MOVL    XAR4,@_OSTCBHighRdy   
     MOV     AL,*+XAR4[0]                    
     MOV     @SP,AL
     
     

     POP   RPC
     IRET
	.end