RE: UART and SoftDevice interrupts

tlongeri — Tue, 21 May 2019 13:54:15 GMT

Thank you for the clear and concise answer!

RE: UART and SoftDevice interrupts

Kenneth — Tue, 21 May 2019 11:10:44 GMT

It seems you have thought of everything I could think of already, but just to confirm what you already write:

[quote user=""]- Are there any other interrupt sources I should be worrying about?
- Could any interrupts (central, peripheral or other) happen back to back, effectively lengthening the duration of the SoftDevice interrupt?
- Similarly, is it a safe assumption that I always have enough time between interrupts to empty the RX buffer into RAM when, say, using nrf_drv_uart?[/quote]

No, No, Yes (presuming you don't have any application interrupts that prevent this).

[quote user=""]So 76800 bits / second is looking like a good option.[/quote]

Presuming the FIFO is empty at the start of the interrupt.

[quote user=""]- Do you happen to know how to estimate the possible UART throughput given BLE connection parameters?[/quote]

No.

[quote user=""]- Do you think it's better to solve this by adding a reliable protocol on top of UART?[/quote]

I think that is a good idea.

A better idea may be to use the nRF52832, which can use EasyDMA to write directly to RAM.