Supporting a real-time task

[Bret Foreman]

My 51822 needs to support some realtime control code that runs for about 75mS. During that time I need to mask all interrupts. With a logic analyzer I can see that my realtime code is getting interrupted every 25mS or so, I guess by the SoftDevice. I tried using CRITICAL_REGION_ENTER/CRITICAL_REGION_EXIT but that does not mask the interrupts.

1. How can I mask interrupts so that my realtme code will not be interrupted no matter what the radio is doing?
2. Is there a way to do this such that I don't unduly disturb the SoftDevice?

Regards, Bret

[Ole Morten]

To clean things up, I'd be happy if you could evaluate the answers you have received and accept one of them if you feel it's sufficient. If not, it might be useful to expand your question a little and provide further information.