On Mon, Feb 24, 2025 at 10:42 AM <kavin...@atindriya.co.in> wrote:
> Hi,
> I have written a c code for GPIO toggling in USRP B205mini-i board.
> The pin should be high for 1microseconds and low for 1milliseconds. I
> have given the c code to verify whether it is correct or not?
>
> while(1)
> {
> uhd_usrp_get_time_now(usrp, mboard, &full_secs, &frac_secs);
> uhd_usrp_set_command_time(usrp, full_secs , frac_secs + 1e-6,
> mboard);
>
This won't work, you need to set this in the future from "time now".
error = uhd_usrp_set_gpio_attr(usrp, bank, "OUT", 0x01, mask1,
> mboard);
> uhd_usrp_clear_command_time(usrp, 0);
> uhd_usrp_get_time_now(usrp, mboard, &full_secs, &frac_secs);
> uhd_usrp_set_command_time(usrp, full_secs , frac_secs + 1e-3,
> mboard);
>
Same here.
> error = uhd_usrp_set_gpio_attr(usrp, bank, "OUT", 0x00, mask1,
> mboard);
> uhd_usrp_clear_command_time(usrp, 0);
> }
>
Get the time "now" outside of the loop, and use that as a base reference.
When you've fixed that, I recommend you connect it to an oscilloscope for
verification.
--M
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