# GPTMR measure PWM

## Overview

The example shows measure PWM wave.

## Board Setting

Please refer to [Pin Description](lab_board_resource) for specific board.
Connect external PWM signal to GPTMR capture pin.


## Running the example

Running the example,if there is a PWM wave input, the serial terminal outputs the following infomation,which are the frequency and duty cycle of the PWM wave.
```console
gptmr pwm measure test
gptmr pwm measure test
[table_0]measured frequency: 1000.049987
[table_0]measured duty cycle: 50.00%
[table_1]measured frequency: 1000.049987
[table_1]measured duty cycle: 50.00%
[table_2]measured frequency: 1000.049987
[table_2]measured duty cycle: 50.00%
[table_3]measured frequency: 1000.049987
[table_3]measured duty cycle: 50.00%
[table_4]measured frequency: 1000.049987
[table_4]measured duty cycle: 50.00%
[table_5]measured frequency: 1000.049987
[table_5]measured duty cycle: 50.00%
[table_6]measured frequency: 1000.049987
[table_6]measured duty cycle: 50.00%
[table_7]measured frequency: 1000.049987
[table_7]measured duty cycle: 50.00%
[table_8]measured frequency: 1000.049987
[table_8]measured duty cycle: 50.00%
[table_9]measured frequency: 1000.059997
[table_9]measured duty cycle: 50.00%
```