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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.

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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.

© COPYRIGHT 2015 WIZnet Co.,Ltd.