frequency_count.h File Reference

Example application for the ESP32 Frequency Counter component. More...

#include <stdint.h>
#include "driver/pcnt.h"
#include "driver/rmt.h"

Go to the source code of this file.

Data Structures
struct	frequency_count_configuration_t

Functions
void	frequency_count_task_function (void *pvParameter)
	Task function - pass this to xTaskCreate with a pointer to an instance of frequency_count_configuration_t as the parameter.

Detailed Description

Example application for the ESP32 Frequency Counter component.

An accurate sampling window signal is created by the RMT component, during which time a Pulse Counter counts both rising and falling edges of the signal of interest.

To connect the RMT window output to the PCNT enable, a GPIO must be used. This is set by rmt_gpio. It should not be used for any external purposes.

Usage:

• Create an instance of frequency_count_configuration_t and set its values appropriately
• Create a task with frequency_count_task() as its function, passing a pointer to the frequency_count_configuration_t into the task creation function

TODO:

• Support sampling periods of milliseconds