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Programming a real randomize timer

Former Member

Hello together.

 

I would like to write a program that give me a random number (range: no matter). I can't realize it. I use PIC controllers, may that could help you to give me an answer. Program languages are C or BASIC.

 

Please help me. Thank a lot!!

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  • Hi Christian

     

    Closet to a Pseudo Random Number Generator that I know of is the following white noise generator code that I have used

     

    Registers required

    Lobyte
    Midbyte
    Hibyte

     

    Code

    movlw 0x0A
    movwf  Lobyte
    movwf Midbyte
    movwf Hibyte

    Loop
    rlf  Lobyte,f
    rlf Midbyte,f
    rlf Hibyte,f
    movlw 0xA1

    btfsc STATUS,C
    xorwf Lobyte,f
    movfw Hibyte
    movwf GPIO        ;For demonstration purposes White Noise will be on GPIO,0

    goto     Loop

     

     

    Regards

    Graham

     

     

    Works well for white noise, and a generated random number on any of the bytes

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  • Hi Christian

     

    Closet to a Pseudo Random Number Generator that I know of is the following white noise generator code that I have used

     

    Registers required

    Lobyte
    Midbyte
    Hibyte

     

    Code

    movlw 0x0A
    movwf  Lobyte
    movwf Midbyte
    movwf Hibyte

    Loop
    rlf  Lobyte,f
    rlf Midbyte,f
    rlf Hibyte,f
    movlw 0xA1

    btfsc STATUS,C
    xorwf Lobyte,f
    movfw Hibyte
    movwf GPIO        ;For demonstration purposes White Noise will be on GPIO,0

    goto     Loop

     

     

    Regards

    Graham

     

     

    Works well for white noise, and a generated random number on any of the bytes

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