Interrupt Issues for UWB in SBSFU

[Istillaga]

Hello,
I am using the SBSFU application on the U575 microcontroller and have created my own program, which is stored in the secure area and accessed via NSC. I am trying to send data via ultrawideband, but the interrupt is not triggered. I have tested it in a normal project before integrating it into the SBSFU application, and it was correctly configured and worked fine. However, now I’m sending via UWB, but the interrupt I designed to notify when the transmission is complete is not triggered, and the transmission loop doesn't exit.

I have also tried adding two RTC alarms and reading their flags via interrupts, but nothing is being read. Do I need to configure any interrupts or settings in the secure boot part or for remote updates? If so, what should be done?

[STea · Accepted solution]

Hello @Istillaga ,

I can't help you with UWB but regarding RTC here is some hints on what the problem might be as I think it is most probably related to security configuration of RTC.

in fact, on some products, the registers programming allows the user to restrict the read/write
operation on RTC/TAMP registers to secure or privileged modes. Some configuration bits establish the restriction
only for some RTC registers.
see sections 63.3.4 RTC secure protection modes and 63.3.5 RTC privilege protection modes of RM0456.
Regards