dsp_tl16c550.asm

来自「dsp5416与tl16c550实现并口转串口通信程序」· 汇编 代码 · 共 96 行

           .include "mmrg.inc"
;	        .include "SUBADDR.asm"
	        .include "data.inc"
           .include "subfunction.inc"
					;define macro
		    .include "subfunction2.inc"
					;define macro
            .include "init_54x.inc"
					;define the initial value of cpu and peripheral registers
            .include "TL16C550C.inc"
                     ;Definition of TL16C550C
;            .include "Address_peripheral.inc"
					;define the peripheral address 
	        
	       	.ref UART_ISR
	    	
STACK		.usect "STACK"	,20H

receive     .usect "receive",8	 	        
	        .ref transmit

            .def	CodeStart

             
	        .sect ".text"
       
CodeStart:  STM #STACK+20H,SP
			INIT_CPU
			RSBX	XF
     		NOP
			NOP
			NOP

	    ;LD  #04H,DP

		NOP
		NOP	
		NOP
		INIT_TL16C550
		RPT #40         
        NOP
		LD #0,A
        
        
 
        
        
LOOP:   NOP
        NOP
       
        B LOOP
        NOP
        NOP
 

        NOP
        NOP
        NOP 

            
UART_ISR:
			;LD  #00H,A 					
	    	;STL A,@IER 
	    	;PORTW IER,0001H 
	    	;RPT #300 
	    	;NOP
SSS:
			NOP
			NOP
			PORTR 0000h , AR4
			;RPT #30         
        	;NOP
			DELAY
			B SSS
		
			
			PSHM ST0 							;Push ST0 stack
   			PSHM ST1 							;Push ST1 stack
            ;PORTR 8002h , @IIR
            ;RPT	#30
            ;NOP
            


	    	 
            POPM	ST1
            POPM	ST0
           
            NOP
            NOP
            RETE
            NOP
            NOP
            NOP
             			
			.end