nRF 52832 Timer Interrupt and Frequency adjustment

RE: nRF 52832 Timer Interrupt and Frequency adjustment

Sigurd — Tue, 26 Nov 2019 10:37:01 GMT

Ok, the closest would then be prescaler set to 0, and CC value set to 833.

That said, you should take a look at the project attached in this post. It uses the SAADC to implement a UART RX and PWM for UART TX.

Alternatively, you could upgrade to nRF52840 to get 2 UART(E) peripherals.

RE: nRF 52832 Timer Interrupt and Frequency adjustment

PoojaK — Tue, 26 Nov 2019 09:30:35 GMT

I want the interrupt at the frequency of 9600 Hz and not 9600 times each second. So basically I want an interrupt after every 1/9600 seconds. I am trying to implement software uart using GPIOs.

RE: nRF 52832 Timer Interrupt and Frequency adjustment

Sigurd — Mon, 25 Nov 2019 17:15:52 GMT

Hi,

How often the TIMER will generate an interrupt depends on the prescaler, and the value set in the Capture/Compare register (CC[x]). From the TIMER chapter in the PS, we have that, "A COMPARE event is generated when the Counter is incremented and then becomes equal to the value specified in one of the capture compare registers."

[quote userid="85087" url="~/f/nordic-q-a/54821/nrf-52832-timer-interrupt-and-frequency-adjustment"]9600 bps[/quote]

You want to generate an interrupt 9600 times each second? If yes, could you explain the use-case, and what you are planning to do in the interrupt handler ?