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RP2040_PWM Library

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Table of Contents

Changelog

Releases v1.7.0

  1. Add functions setPWMPushPull_Int, setPWMPushPull and setPWMPushPull_Period for the new PushPull mode. Check pwm_set_output_polarity #21
  2. Add these examples to demo the new PushPull mode
  1. Fix bug of half frequency when using phaseCorrect mode
  2. Improve README.md so that links can be used in other sites, such as PIO

Releases v1.6.0

  1. Optimize speed with new setPWM_manual_Fast function to improve almost 50% compared to setPWM_manual. Check setPWM latency #19
  2. Add example PWM_SpeedTest to demo the better speed of new setPWM_manual_Fast function
  3. Modify examples PWM_manual to use new setPWM_manual_Fast function

Releases v1.5.0

  1. Add example PWM_manual to demo how to correctly use PWM to generate waveform
  2. Add function setPWM_DCPercentage_manual() to facilitate the setting PWM DC manually by using DCPercentage, instead of absolute DCValue depending on varying TOP
  3. Add functions getPin() and getActualDutyCycle()

Releases v1.4.1

  1. Add example PWM_StepperControl to demo how to control Stepper Motor using PWM. Check Using PWM to step a stepper driver #16
  2. Use allman astyle and add utils

Releases v1.4.0

  1. Fix glitch when dynamically changing dutycycle. Check Changing Duty Cycle Dynamically Creates Runt PWM pulse #10
  2. Adjust MIN_PWM_FREQUENCY and MAX_PWM_FREQUENCY dynamically according to actual F_CPU
  3. Update examples

Releases v1.3.1

  1. Add minimal example PWM_Basic. Check added minimal viable program to get the user up and running #9

Releases v1.3.0

  1. Add setPWM_manual(pin, level) function for efficiency in wafeform creation using PWM. Check Duty cycle as integer rather than float #6
  2. Add example PWM_Waveform_Fast to demonstrate how to use new setPWM_manual(pin, level) function.
  3. Add setPWM_Int() function for optional uint32_t dutycycle = real_dutycycle * 1000. Check Duty cycle as integer rather than float #6
  4. Add example PWM_DynamicDutyCycle_Int to demonstrate how to use new setPWM_Int() function.
  5. Rewrite many functions to take advantage of new features.

Releases v1.2.0

  1. Add efficient setPWM_manual() function to use in wafeform creation using PWM. Check Duty cycle as integer rather than float #6
  2. Add example PWM_Waveform to demonstrate how to use new setPWM_manual() function in wafeform creation
  3. Optimize library code and examples by using reference-passing instead of value-passing and inline.

Releases v1.1.1

  1. Fix compiler warnings.
  2. Display informational warning when _PWM_LOGLEVEL_ > 3

Releases v1.1.0

  1. Permit PWM output for both channels of PWM slice. Check Request for Clarification on PWM Slices and A/B sides #5
  2. Use float instead of double for frequency and duty-cycle
  3. Add example PWM_MultiChannel to demonstrate how to use both channels of PWM slice.

Releases v1.0.5

  1. Permit changing dutyCycle and keep same frequency on-the-fly. Check Attempting to Alter the Duty Cycle w/o changing any other values #3
  2. Add example PWM_DynamicDutyCycle to demonstrate new feature
  3. Add support for more boards using arduino-pico core, such as ADAFRUIT_ITSYBITSY_RP2040, CYTRON_MAKER_NANO_RP2040, SPARKFUN_PROMICRO_RP2040, CHALLENGER_2040_WIFI_RP2040, ILABS_2040_RPICO32_RP2040, MELOPERO_SHAKE_RP2040, SOLDERPARTY_RP2040_STAMP, UPESY_RP2040_DEVKIT, WIZNET_5100S_EVB_PICO, etc.
  4. Display compiler informational warning messages only when _PWM_LOGLEVEL_ > 3

Releases v1.0.4

  1. Fix platform in library.json

Releases v1.0.3

  1. Not reprogram if same PWM frequency.
  2. Add PIO strict lib_compat_mode

Releases v1.0.2

  1. Fix bug not changing frequency dynamically. See Change the PWM frequency #2

Releases v1.0.1

  1. Fix bug generating wrong frequency. See Wrong frequency #1

Initial Releases v1.0.0

  1. Initial coding to support RP2040-based boards such as Nano_RP2040_Connect, RASPBERRY_PI_PICO, etc. using either RP2040 ArduinoCore-mbed mbed_nano or mbed_rp2040 core or Earle Philhower's arduino-pico core
  2. The purely hardware-based PWM channel can generate from very low (lowest is 7.5Hz) to very high PWM frequencies (in the MHz range, up to 62.5MHz).