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PWM Timer Mode example

(C) COPYRIGHT 2015 WIZnet Co.,Ltd.

  • file : PWM/CaptureMode/readme.md
  • author : IOP Team
  • version : V1.0.0
  • date : 01-May-2015
  • brief : Description of the PWM Capture Mode 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 run capture mode.

The PWM channel 0 frequency is set to SystemCoreClock(Hz), the Prescaler is 2 so the PWM0 counter clock is 10 MHz. SystemCoreClock is set to 20 MHz.

The PWM channel 0 is configured in Timer Mode and duty cycle is 50 %. Timer/Counter is up-count mode and periodic mode. Capture mode is rising edge detection. 1 interrupts out of 3 interrupts are enabled: capture interupt(match and overflow interrupt is excepted).

The Timer/Counter runs periodically and if capture signal(PC_00) is received, the Timer/Counter value is saved at capture register and capture interrupt is occurred. In capture interrupt handler, RED LED(PC_08) is toggled.

Directory contents​

  • PWM/CaptureMode/main.c (Main program)
  • PWM/CaptureMode/W7500x_it.c (Interrupt Handlers)
  • PWM/CaptureMode/W7500x_it.h (Interrupt Handlers Header file)
  • PWM/CaptureMode/W7500x_conf.h (Library Configuration file)
  • PWM/CaptureMode/MDK/W7500x_PWM_CaptureMode.uvproj (MDK Project file)
  • PWM/CaptureMode/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

    • Use the RED LED connected to PC_08 pin.
    • Use the capture input connected to PC_00 pin.
    • In order to use the RED LED(PC_08) to be changed from PAD_AF0 to PAD_AF1.
    • In order to use the capature intput(PC_00) to be changed from PAD_AF0 to PAD_AF2.
    • External input button has to be configured separately.

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.