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parisa
parisa
Associate III
December 23, 2016
Question

generate pulse wave with stm32f10x and cmsis library

  • December 23, 2016
  • 2 replies
  • 582 views
Posted on December 23, 2016 at 19:30

Hello

I'm supposed to generate pulse train with stm32f10x and cmsis library.

TIM_TimeBaseInitTypeDef TIMST;

 

TIMST.TIM_Prescaler=72;

 

TIMST.TIM_Period=1000;

 

TIMST.TIM_ClockDivision=TIM_CKD_DIV1;    

 

TIMST.TIM_CounterMode=    TIM_CounterMode_Up ;

 

TIM_TimeBaseInit(TIM2, &TIMST);

         TIM_OCInitTypeDef TIMCRC;

        TIMCRC.TIM_OCMode=TIM_OCMode_Toggle;

        TIMCRC.TIM_OCIdleState=TIM_OCIdleState_Reset;

        TIMCRC.TIM_OCNIdleState=TIM_OCNPolarity_Low;

        TIMCRC.TIM_OCPolarity=TIM_OCPolarity_High;

        TIMCRC.TIM_OCNPolarity=TIM_OCPolarity_Low;

        TIMCRC.TIM_OutputNState=TIM_OutputNState_Disable;

        TIMCRC.TIM_OutputState=TIM_OutputNState_Enable;

        TIMCRC.TIM_Pulse=

But I don't know how I can define Pulse variable value for specific output frequency.(Is this code correct? or I did some mistake? )

#stm32f10x #timer
This topic has been closed for replies.

2 replies

Amel NASRI
Amel NASRI
ST Technical Moderator
December 26, 2016
Posted on December 26, 2016 at 17:46

Hi

Mohamadi.Parisa

‌,

Please precise what do you expect exactly as result?

Did you tried this code and it doesn't match what you need?

I recommend you to refer to theGeneral-purpose timer cookbook (

http://www.st.com/content/ccc/resource/technical/document/application_note/group0/91/01/84/3f/7c/67/41/3f/DM00236305/files/DM00236pdf/jcr:content/translations/en.DM00236pdf

) : it explains various use cases related to timers and can be helpful for you to implement your own case.

-Amel-

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parisa
parisaAuthor
Associate III
December 26, 2016
Posted on December 26, 2016 at 18:14

Thanks for your response.

Actually I want to create a square pulse (frequency <100khz) with Stm32f10x and timer output compare mode.I have seen different codes that they use PWM mode but I want to learn how can work in output compare mode with timers?

So I need to know how can I define Prescaler, Periode and Pulse variables for an specific output frequency? and where can I find simple code in output compare mode?

I haven't read time cookbook yet but maybe I will find my answer.

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