not get GPIO pulse



  • hello everybody i try to
    generatea GPIO pulse signal but i dont get any signal an oscilloscope.i use raspberryPi2 als controller
    my code

    #define PIN RPI_BPLUS_GPIO_J8_11
    if (!bcm2835_init())
    {
    qDebug() << "error during initialisation of library"
    }
    else

    {
    
        bcm2835_gpio_fsel(PIN, BCM2835_GPIO_FSEL_OUTP) //set pin to output
        bcm2835_gpio_clr(PIN);// set pin to low
    
         {    for(int i=0; i<5;i++)//5 perioden
                           
                     bcm2835_gpio_write(PIN, HIGH)// pin auf 1
                     bcm2835_delay(500);    //wait 0.5s
                     bcm2835_gpio_write(PIN, LOW);//pin auf 0
                     bcm2835_delay(500);//wait 0.5
         }
    

    }



  • Hi are you getting any error? And are you running the code as root? (sudo ./a.out) Try pasting your code. Examples from http://www.effusiontech.com/how-to-blink-led-in-raspberry-pi-using-c-language.html is working fine.


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