ULP Pulse Counting Example

[filipESP]

Hi,
I'm trying to use ULP for counting pulse from GPIO.
Button on the pcb board is connect to GPIO34, so I changed variable gpio_num from GPIO_NUM_0 to GPIO_NUM_34 and I wake up the ESP with using timer in five seconds periods.
I do nothing when the program is executing but I get the number of pulse in e.g. equals to 3562.
What pulses are count in this case?

[WiFive]

Gpio34 has no internal pull resistor so it floats and you are measuring noise

[filipESP]

In case with GPIO_NUM_0 is the same problem.
So, what I need to do is set internal pull on the GPIO_NUM_0 pin?

[filipESP]

OK, it is working when I use esp_sleep_enable_ulp_wakeup() function but I need to use function called esp_sleep_enable_timer_wakeup( 6000000 ). The ESP wakes up but doesn't count the pulse from the button.

[WiFive]

Call both

[Ritesh]

Call both

Is this uses to count only total number of pulses? Not used to measure timing of each pulse ? Correct?

[filipESP]

If I would to use two GPIOs in the same time what I need two modify in the .S file?

[Ritesh]

Call both

Is this uses to count only total number of pulses? Not used to measure timing of each pulse ? Correct?

Hi WiFive,

Would you please check my last question and provide your valuable feedback for same?