Interrupt after a number of pulses wit STM32H563RG

[SchlossiLukas]

Hi all,

I'm using an STM32H563RG from STM.

I was able to make the qdec on timer1 run and read pulses from an external encoder. Now I wanna generate an interrupt after let's say 100 pulses. That interrupt should toggle a led

I mean the timer has interrupts, but i don't know how to use them in Zephyr.

That is my timerconfig in the devicetree:
tim: &timers1 {
compatible = "st,stm32-timers";
reg = <0x40012c00 0x400>;
clocks = <&rcc STM32_CLOCK(APB2, 11U)>;
resets = <&rctl STM32_RESET(APB2, 11U)>;
interrupts = <44 0>;
interrupt-names = "cc";
st,prescaler = <0>;
status = "okay";

qdec: qdec {
    compatible = "st,stm32-qdec";
    status = "okay";
    pinctrl-0 = <&tim1_ch1_pe9 &tim1_ch2_pe11>;
    pinctrl-names = "default";
    st,input-polarity-inverted;
    st,input-filter-level = <15>;     // FDIV32_N8-->15: Fs = F_clk/32, N=8
    st,counts-per-revolution = <700>;
    st,encoder-mode = <1>;   //???????
};

};

Code to read the pulses:

const struct device *const dev = DEVICE_DT_GET(DT_ALIAS(qdec0));
const struct qdec_stm32_dev_cfg *dev_cfg = (const struct qdec_stm32_dev_cfg *)dev->config;
position = LL_TIM_GetCounter(dev_cfg->timer_inst);
printk("Number of pulses: %" PRIi32 "\n", position);

There is this interrupt API:
IRQ_CONNECT(MY_DEV_IRQ, MY_DEV_PRIO, my_isr, MY_ISR_ARG, MY_IRQ_FLAGS); irq_enable(MY_DEV_IRQ);

Pos 42 (prio 50) in the IR vector table of the µC is called "Update interrupt". Can I use this one? How can I define the number of pulses? Is that the ARR register? If yes, how can i change the value?

Thank you for you help.

Best regards
Lukas