50.5. Pwm Output

50.5.1. Overview

pwm project configures several different types of waveforms and outputs them.

  • Forced output

  • Edge-aligned PWM

  • Center-aligned PWM

  • Center-aligned complementary PWM

  • PWM fault protection

  • Four comparator output with different logic modes (AND, XOR, CD)

  • PWM DAC output

  • Edge-aligned PWM with jitter compensation

50.5.2. Configurations

  • Dual Channel Oscilloscope

  • Install the serial terminal, view board information, and configure the serial terminal parameters

  • PWM_P0 and PWM_P1 pins Check the information according to the board model

50.5.3. Running the Demo

  • After power on, the oscilloscope can observe: - P0, P1 output high level and low level - Edge-aligned PWM with duty cycle varying from 0% to 100% - Center-aligned PWM with duty cycle varying from 0% to 100% - Center-aligned complementary PWM with duty cycle varying from 0% to 100% - Four comparator output with different logic modes - PWM DAC output with varying duty cycle - Edge-aligned PWM with jitter compensation

  • After the fault pin is given a high level, P0 and P1 pin PWM outputs are low, and after the fault pin is given a low level, P0 and P1 pin PWM return to normal

  • Serial port printing information:

pwm example

>> Test force PWM output on P0 and P1
Output high
Output low

>> Generate edge aligned waveform
Two waveforms will be generated, PWM P0 is the target waveform
whose duty cycle will be updated from 0 - 100 and back to 0; PWM P1 is a reference

>> Generate central aligned waveform
Two waveforms will be generated, PWM P0 is the target waveform
whose duty cycle will be updated from 0 - 100 and back to 0; PWM P1 is a reference

>> Generate central aligned waveform in pair
Two waveforms will be generated in pair, PWM P0 and P1 are target
waveforms whose duty cycle will be updated from 0 - 100 and back to 0

>> Generate edge aligned jit waveform
Two waveforms will be generated, PWM P0 is the target waveform
whose duty cycle will be updated from 0 - 100 and back to 0; PWM P1 is a reference

>> Generate four cmp waveform
Two waveforms will be generated, PWM P0 is the target waveform
whose duty cycle will be updated from 0 - 100 and back to 0; PWM P1 is a reference

>> Generate pwm dac waveform
Two waveforms will be generated, PWM P0 is the target waveform
whose duty cycle will be updated from 0 - 100 and back to 0; PWM P1 is a reference

test done

Note

The demo outputs each PWM waveform once in sequence. To observe the waveforms again, you need to run the program again.