Hi all,
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);
Is cc interrupt the correct one or should I use the "update interrupt"?
Thank you for your help
Best regards and greetings from Austria
Lukas
