Internal interrupt service routine with timer trigger Uno R4 Minima

[southafrican_wannebeeprogrammer]

Hi I was using a internal interrupt service routine that was triggered by a timer on a Uno R3.

I used this to create a ramp for a PWM pin, however since the R4 Minima has a DAC this is better suited for my project, however the CPU has changed and there is not a lot of info regarding this on the web, I had a look at the timers on this page: Under the Hood: Arduino UNO R4 - Timers - Phil Schatzmann

however I would prefer to use the AGT timers in conjunction with the internal interrupt service routine in this case.

biggest problem is that I can't seem to find anything regarding Internal interrupt service routines on the R4 Minima

any help will be greatly appreciated

[Rintin]

When I implemented my example for using an encoder with timer I needlessly complicated it by adding overflow and underflow interrupts.

Rotary encoder with R4 using timer

I played a little bit with the timer on an Arduino Uno R4 Minima and created this little example on how to use GPT162 with a rotary encoder: /** * Example for using a rotary encoder with a timer. * * This works with an Arduino Uno R4 Minima * * Pin connections: * Encoder Arduino Uno R4 Minima * A P102 (D5) * B P103 (D4) * com GND */ #include "FspTimer.h" FspTimer timer{}; int event = -1; void isr_GPT162(timer_callback_args_t *p_args) { event …

FSPTimer also allows for interrupts on Capture A and B:

arduino/ArduinoCore-renesas/blob/main/cores/arduino/FspTimer.h#L152

Maybe it helps you.