c3_2_1.asm

dsp入门与实践一书的源代码

tim0_ctl  .equ  0x01940000                
tim0_prd  .equ  0x01940004                
tim0_cnt  .equ  0x01940008                 
          .text
interrupt_init:
          	SUB 	A0, A0, A0
     ||    	MVC 	CSR, B0
          	MVC 	A0, ISTP
     ||    	OR  	0x01, B0, B0        
          	MVKL  	0FFFFh, A0
     ||    	MVC 	B0, CSR
          	MVC   	A0, IER                         
timer1_init:   	MVKL   	tim0_prd, B4			
            	MVKH   	tim0_prd, B4
            	MVKL   	02F40h, A0
            	STW     A0, *B4
            	NOP     4            				
            
            	MVKL   	00000FF7Eh,A2		
            	MVKH 	00000FF7Eh,A2
            	MVKL 	tim0_ctl, B4
            	MVKH 	tim0_ctl, B4
            	STW  	A2, *B4
            	nop  	4