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PWM Output example

(C) COPYRIGHT 2015 WIZnet

  • file : PWM/PWMOutput/readme.md
  • author : IOP Team
  • version : V1.0.0
  • date : 01-May-2015
  • brief : Description of generation of the PWM output signal example.

THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS A RESULT, WIZnet SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

Example Description​

This example shows how to use the PWM peripheral to generate PWM output signal.

The PWM channel 3, 4, 5 frequency is set to SystemCoreClock(Hz), the Prescaler is 2 so the PWM channel 3, 4, 5 counter clock is 10 MHz. SystemCoreClock is set to 20 MHz.

The PWM channel 3, 4 is set as up-count and periodic mode and 5 is set as down-count and one-shot mode. So PWM channel 5 generates output signal once. The PWM channel 3, 4, 5 are all PWM output enabled.

The PWM channel 3 is configured in Timer Mode and duty cycle is 80 % and 4 is 30 %.

The PWM channel 3 is mapped to PA_06, 4 is mapped to PA_07 and 5 is mapped to PA_08.

Directory contents​

  • PWM/PWMOutput/main.c (Main program)
  • PWM/PWMOutput/W7500x_it.c (Interrupt Handlers)
  • PWM/PWMOutput/W7500x_it.h (Interrupt Handlers Header file)
  • PWM/PWMOutput/W7500x_conf.h (Library Configuration file)
  • PWM/PWMOutput/MDK/PWMOutput.uvproj (MDK Project file)
  • PWM/PWMOutput/GCC/Makefile (GCC Make file)

Hardware and Software environment​

  • This example has been tested with WIZnet WIZwiki W7500 platform.

  • To select the WIZnet WIZwiki platform used to run the example.

  • WIZwiki W7500 Set-up

    • PA_06 pin generates the PWM channel 4 output signal.
    • PA_07 pin generates the PWM channel 5 output signal.
    • PA_08 pin generates the PWM channel 6 output signal.
    • In order to use the PWM channel 4(PA_06) to be changed from PAD_AF0 to PAD_AF3.
    • In order to use the PWM channel 5(PA_07) to be changed from PAD_AF0 to PAD_AF3.
    • In order to use the PWM channel 6(PA_08) to be changed from PAD_AF0 to PAD_AF3.

How to use it ?​

In order to make the program work, you must do the following :

  • Open your preferred toolchain.
  • Rebuild all files and load your image into target memory.
  • Run the example.
  • WIZwiki W7500 where the Flash memory density ranges 128Kbytes.
  • If you have any questions, please use the forum site.

© COPYRIGHT 2015 WIZnet Co.,Ltd.