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Re: MPLAB 中的減法運算
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資深會員
 
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忘記帶符號減法 , 是我錯了 .....
但已來不及刪除 ...... 請把它當成笑話一場... 
發表於: 2009/1/9 8:34
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MPLAB 中的減法運算
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資深會員
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如 附圖 616-A 所示 5 - 0XFC 結果為 9 感覺怪怪的
但如 附圖 616-B 得到負數 才覺得正確 不知是 MPLAB 的 BUG 還是真的如此 感覺怕怕的 不知各位大大 有無碰到類似的情形 ..... 請多指導一下 CBLOCK 0X20 AAH , AAL , BBH , BBL ENDC ; #define AA .504 #define AA .517 #define BB .508 #define C_FLAG STATUS , 0 ORG 0X00 MOVLW 0X20 MOVWF FSR CLRF INDF INCF FSR , F BTFSS FSR , 4 GOTO $ - 3 MOVLW HIGH AA ; MOVLW 2 MOVWF AAH MOVLW LOW AA ; MOVLW 5 MOVWF AAL MOVLW HIGH BB MOVWF BBH MOVLW LOW BB MOVWF BBL MOVF BBH , W SUBWF AAH , F MOVF BBL , W BCF C_FLAG ; SET BREAK-POINT TO NEXT LINE & RUN SINGLE STEP SUBWF AAL ,F GOTO $ END Attach file: Link only for registered users
發表於: 2009/1/9 4:34
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