Realizing Bit Logic Operations Using Single Chip Microcomputer

Write a program to complete the following logical functions:

Q = XYZ\F + XY\ZF + X\YZF + XYZF (\Y means Y is not, \Z means Z is not, etc.)

This logical expression can be simplified to: Q = XYZ + XYF + XZF

Assume that the pins corresponding to each variable are as follows:

X: P1.0

Y: P1.1

Z: P1.2

F: P1.3

Q: P1.7

The procedure is as follows:

MOV C, P1.0

ANL C, P1.1

ANL C, P1.2

MOV F0, C

MOV C, P1.0

ANL C, P1.1

ANL C, P1.3

ORL C, F0

MOV F0, C

MOV C, P1.0

ANL C, P1.2

ANL C, P1.3

ORL C, F0

MOV P1.7, C

END

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MCU: Please write a program to implement the XOR operation of bit X and bit Y.

2010-10-12 22:03 The Invincible Chinese | Category: Other Programming Languages ​​| Views: 1546

Assume X and Y are stored at 00H and 01H respectively, and the result is that Z is stored at 02H.

(Note: 00H, 01H, 02H are bit addresses, belonging to D0, D1, D2 of internal RAM20H)

    CLR 02H

    MOV C, 00H

    ANL C, 01H

    JC _END_

    MOV C, 00H

    ORL C, 01H

    JNC _END_

    SETB 02H

_END_:

;over

END

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Microcontroller: Please write a program to implement the XOR operation of bit X and bit Y.

Assume X and Y are stored in 00H and 01H respectively, and the result is that Z is stored in 02H.

Note: 00H, 01H, 02H are bit addresses, belonging to D0, D1, D2 of internal RAM20H

method 1:

;

    MOV C, 00H

    ANL C, /01H

    MOV F0, C

    MOV C, 01H

    ANL C, /00H

    ORL A, F0

    MOV 02H, C

END

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Method 2:

;

    CLR 02H

    JNB 00H, ZZZ

    JNB 01H, EXIT

    SJMP EXIT

ZZZ:

    JB 01H, EXIT

    SETB 02H

EXIT:

END

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Method 3:

;

    MOV A, 20H

    R R

    XRL A, 20H

    RL A

    RL A

    ANL A, #00000100B

    JZZZ

    ORL 20H, A

    SJMP EXIT

ZZZ:

    CPL A

    ANL 20H, A

EXIT:

END

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