# HRPWM Calibration

## Overiew


**pwm** project demo how to calibrate the effect of temperature in the use of high-precision pwm.

## Configurations


- Dual Channel Oscilloscope
- Install the serial terminal, view [board information](lab_board_overiew), and configure the serial terminal parameters
- [PWM_P0 and PWM_P1 pins](lab_board_drv_pwm_pin) Check the information according to the board model


## Running the Demo

- After power on, through the oscilloscope can be observed in turn P0, P1 output duty cycle of 50 percent, of which the high-precision part of the P0 to 0-255 cents of a clock cycle change. When the chip temperature changes, the program will be calibrated and printed through the serial port to complete or fail
- Serial port printing information:

```console
pwm example


>> Generate edge aligned waveform
Two waveforms will be generated, PWM P1 is the target waveform
whose hrpwm cycle will be updated from 0 - 255 and back to 0; PWM P2 is a reference

calibration done

```