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products:w7500:peripherals:pwm:countermode

PWM Counter Mode example


(C) COPYRIGHT 2015 WIZnet

  • file : PWM/CounterMode/readme.md
  • author : IOP Team
  • version : V1.0.0
  • date : 01-May-2015
  • brief : Description of the PWM Counter 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 counter mode.

The PWM channel 0 frequency is set to SystemCoreClock(Hz). SystemCoreClock is set to 20 MHz.

The PWM channel 0 is configured in rising edge counter mode, up-count mode, periodic mode. So the PWM channel 0 Timer/Counter is counted when input signal is triggered. 2 interrupts out of 3 interrupts are enabled: match and overflow interupt(capture interrupt is excepted).

The PWM channel 0 output pin(PC_00) is used for input.

When the Timer/Counter reaches the match value, RED LED(PC_08) is toggled every times, and when the Tiemr/Counter reaches the limit value, GREEN LED(PC_09) is toggled every times.


Directory contents

  • PWM/CounterMode/main.c (Main program)
  • PWM/CounterMode/W7500x_it.c (Interrupt Handlers)
  • PWM/CounterMode/W7500x_it.h (Interrupt Handlers Header file)
  • PWM/CounterMode/W7500x_conf.h (Library Configuration file)
  • PWM/CounterMode/MDK/W7500x_PWM_CounterMode.uvproj (MDK Project file)
  • PWM/CounterMode/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 RED LED connected to PC_08 pin.
    • Use GREEN LED connected to PC_09 pin.
    • Use PC_00 for input signal.
    • In order to use the RED LED(PC_08) to be changed from PAD_AF0 to PAD_AF1.
    • In order to use the GREEN LED(PC_09) to be changed from PAD_AF0 to PAD_AF1.
    • In order to use the 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.
    • "http://wizwiki.net/forum/"
products/w7500/peripherals/pwm/countermode.txt · Last modified: 2015/04/27 09:33 by justinkim