loops.asm

"DIGITAL SIGNAL PROCESSING WITH C AND THE TMS32 0C30"一书的附带程序

;LOOPS.ASM-LOOP PROGRAM USING THE AIC-CALLS AICCOMA.ASM  
        .TITLE  "LOOPS.ASM"     ;OUTPUT=INPUT(AMPLIFIED)
        .OPTION X               ;FOR SYMBOL XREF
        .GLOBAL RESET,BEGIN,AICSET,AICSEC,AICIO_P,SPSET
        .SECT   "VECTORS"       ;VECTOR SECTION
RESET   .WORD   BEGIN           ;RESET VECTOR
        .SPACE  63              ;REMAINDER OF VECTOR SECTION
        .DATA                   ;ASSEMBLE INTO DATA SECTION
AICSEC  .WORD   1428h,1h,4A96h,67h ;SP0 AIC CONFIG DATA
        .TEXT                   ;ASSEMBLE INTO TEXT SECTION
BEGIN   LDP     SPSET           ;INIT DATA PAGE
        CALL    AICSET          ;INIT PRIMARY AIC/TMS320C30
        LDI     0,R7            ;INIT R7 = OUTPUT 0
LOOP    CALL    AICIO_P         ;I/O ROUTINE,INPUT=>R6,OUT=>R7
        LDI     R6,R7           ;OUTPUT R7=NEW INPUT SAMPLE
        BR      LOOP            ;LOOP CONTINUOUSLY
        .END                    ;END