Disable interrupts

RE: Disable interrupts

gaminn — Tue, 03 Jan 2017 09:31:13 GMT

OK, thanks.

RE: Disable interrupts

Susheel Nuguru — Tue, 03 Jan 2017 09:28:58 GMT

We strongly recommend not to disable global interrupts (and hence softdevice interrupts) but if you do not have any option then disabling it for <=10us should work.

RE: Disable interrupts

gaminn — Tue, 03 Jan 2017 09:19:05 GMT

The whole cycle will last <=6 us. So is it really possible to disable interrupts for <=10 us by __disable_irq();? Because there was a post on this forum (I can't remember the link) stating that disabling softdevice interrupts for arbitrary time period will eventually break timing in softdevice.

RE: Disable interrupts

Susheel Nuguru — Tue, 03 Jan 2017 09:03:58 GMT

the softdevice will allow blocking its interrupts for <=10us. But 60us is too much and the softdevice may assert if you try to block its interrupts for so long.

RE: Disable interrupts

gaminn — Tue, 03 Jan 2017 08:51:14 GMT

I apologize. I want to execute steps 1) to 3) without being interrupted by any interrupt (user interrupt or softdevice interrupt), because I have to keep strict timing of the peripheral which is connected to the GPIO (PIN1 HIGH level can't last more than 60 us in no way).

RE: Disable interrupts

Susheel Nuguru — Tue, 03 Jan 2017 08:46:20 GMT

Im little confused with the title and the contents of the question. Are you asking if you can read PIN2 everytime PIN1 have a transition to high level for 25 cycles without enabling GPIO interrupt?