This looks fine. Two questions:
- Have you double-checked the pin mapping? (
https://uhd.readthedocs.io/en/latest/page_usrp_x3x0.html#x3x0_hw_gpio)
- Are you querying this during operation of your app, or do you let the app
terminate and then measure voltages?
--M
On Fri, Sep 27, 2024 at 8:59 PM Will Haftel via USRP-users <
usrp-users@lists.ettus.com> wrote:
> Hi,
>
>
> I am attempting to manually control certain GPIO pins on the x310 as
> outputs that will control external antenna sources. In the code sample
> below, I am intending to set pin 2 to low and pins 3/4 to high, but am not
> having any luck. Would it be possible to point out if there is something
> wrong in this code?
>
>
> usrp->set_gpio_attr("FP0", "CTRL", 0x000, 0xFFF);
>
> usrp->set_gpio_attr("FP0", "DDR", 0xFFF, 0xFFF);
>
> usrp->set_gpio_attr("FP0", "OUT", 0, (1<<2));
>
> usrp->set_gpio_attr("FP0", "OUT", 1, (1<<3));
>
> usrp->set_gpio_attr("FP0", "OUT", 1, (1<<4));
>
>
> Thank you!
>
> Will
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