16.5. GPTMR measure PWM

16.5.1. Overview

The example shows measure PWM wave.

16.5.2. Board Setting

Please refer to Pin Description for specific board. Connect external PWM signal to GPTMR capture pin.

16.5.3. 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.

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%