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CC3200 Pullup/pullDown activate

erez posner
Prodigy 70 points
Other Parts Discussed in Thread: CC3200

Hello, I cant seem to activate pulldown/pullup internal resistor in an GPIO configured as input.

i tried both:

PinConfigSet(GPIO_REED,PIN_STRENGTH_4MA,PIN_TYPE_OD_PU);

and 

GPIO_IF_Set(GPIO_REED, g_uiREEDPort, g_ucREEDPin, 1);

and my configuration is :

MAP_PinTypeGPIO(PIN_61, PIN_MODE_0, false);
MAP_GPIODirModeSet(GPIOA0_BASE, 0x40, GPIO_DIR_MODE_IN);

any thoughts?

thank you

  • 0
    Expert 1285 points

    Dear Erez,

    Use the following statements to activate pull-up/pull-down resistor on an input Pin.

    // Activate internal pull-up resistor on PIN_61
MAP_PinConfigSet(PIN_61, PIN_STRENGTH_4MA, PIN_TYPE_STD_PU);
    // Activate internal pull-down resistor on PIN_61
MAP_PinConfigSet(PIN_61, PIN_STRENGTH_4MA, PIN_TYPE_STD_PD);

    Regards,

    Vaibhav

    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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  • 0 in reply to Vaibhav Srivastava
    Prodigy 70 points
    Thank you, that did it.
    one thing, I don't understand the usage for the GPIO name indices (e.g. pin_61 is GPIO06)
    why is it in use anyway?
    it seem that we always use the pin number with the function "GPIO_IF_GetPortNPin()" for the GPIO port and pin number.
  • 0 in reply to erez posner
    Expert 1285 points

    Yes,  CC3200 GPIO may be confusing in the beginning.

    erez posner said:
    it seem that we always use the pin number with the function "GPIO_IF_GetPortNPin()" for the GPIO port and pin number.

    No, we use GPIO number with the function GPIO_IF_GetPortNPin(). For example to get the GPIO Port and GPIO Pin for PIN_61 (GPIO06) we can use it as:

    unsigned int pin61_gpio_port=0;
unsigned char pin61_gpio_pin=0;

GPIO_IF_GetPortNPin(6, &pin61_gpio_port, &pin61_gpio_pin);

    Regards,

    Vaibhav

    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    If my reply answers your question, please click the  Verify Answer   button below the answer to help other users find the correct answer easily.