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Set port1 pins as 0 or 1

radhakrishnan murugesan

Dear all,
i am using P89V51RD2 (philips) 8051 micro-controller. i am doing some samples with NSK developemnt kit. In this i want to set the Port1 pint 0 to 7 as high/low continiously. I tried this by using the following lines,

P1 = 0x00 ;
delay(10000) ;
P1 = 0xFF ;

but still i am always getting around 5V on these pins. i searched lot of forums, but in that also they mentioned like this only. Kindly give your suggessions.......

Thanks and Regards
Radhakrishnan M

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    I don't know C51 at all, but I can offer to make sure that:
    1. You configured to respective pins as output.
    2. That the peripheral is powered (is that applicable to your chip? I don't know).
    3. That the sampling rate of your monitoring device is fast enough to catch the change/trigger.
    4. ...?

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  • 0

    I don't know C51 at all, but I can offer to make sure that:
    1. You configured to respective pins as output.
    2. That the peripheral is powered (is that applicable to your chip? I don't know).
    3. That the sampling rate of your monitoring device is fast enough to catch the change/trigger.
    4. ...?

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