那个stm32的pwm输出为什么设置为静态函数啊

只看该作者 · 2018-6-30 10:52

[code=c]

[/code]/*
* &ordm;&macr;&Ecirc;&yacute;&Atilde;&ucirc;&pound;&ordm;TIM3_Mode_Config
* &Atilde;è&Ecirc;&ouml;  &pound;&ordm;&Aring;&auml;&Ouml;&Atilde;TIM3&Ecirc;&auml;&sup3;&ouml;&micro;&Auml;PWM&ETH;&Aring;&ordm;&Aring;&micro;&Auml;&Auml;&pound;&Ecirc;&frac12;&pound;&not;&Egrave;&ccedil;&Ouml;&Uuml;&AElig;&Uacute;&iexcl;&cent;&frac14;&laquo;&ETH;&Ocirc;&iexcl;&cent;&Otilde;&frac14;&iquest;&Otilde;±&Egrave;
* &Ecirc;&auml;&Egrave;&euml;  &pound;&ordm;&Icirc;&THORN;
* &Ecirc;&auml;&sup3;&ouml;  &pound;&ordm;&Icirc;&THORN;
* &micro;÷&Oacute;&Atilde;  &pound;&ordm;&Auml;&Uacute;&sup2;&iquest;&micro;÷&Oacute;&Atilde;
*/
static void TIM3_Mode_Config(void)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef  TIM_OCInitStructure;

  /* PWM&ETH;&Aring;&ordm;&Aring;&micro;&ccedil;&AElig;&frac12;&Igrave;&oslash;±&auml;&Ouml;&micro; */
  u16 CCR1_Val = 500;
  u16 CCR2_Val = 375;
  u16 CCR3_Val = 250;
  u16 CCR4_Val = 125;

/* -----------------------------------------------------------------------
TIM3 Configuration: generate 4 PWM signals with 4 different duty cycles:
TIM3CLK = 72 MHz, Prescaler = 0x0, TIM3 counter clock = 72 MHz
TIM3 ARR Register = 999 => TIM3 Frequency = TIM3 counter clock/(ARR + 1)
TIM3 Frequency = 72 KHz.
TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR)* 100 = 50%
TIM3 Channel2 duty cycle = (TIM3_CCR2/ TIM3_ARR)* 100 = 37.5%
TIM3 Channel3 duty cycle = (TIM3_CCR3/ TIM3_ARR)* 100 = 25%
TIM3 Channel4 duty cycle = (TIM3_CCR4/ TIM3_ARR)* 100 = 12.5%
  ----------------------------------------------------------------------- */

  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 999;    //&micro;±&para;¨&Ecirc;±&AElig;÷&acute;&Oacute;0&frac14;&AElig;&Ecirc;&yacute;&micro;&frac12;999&pound;&not;&frac14;&acute;&Icirc;&ordf;1000&acute;&Icirc;&pound;&not;&Icirc;&ordf;&Ograve;&raquo;&cedil;&ouml;&para;¨&Ecirc;±&Ouml;&Uuml;&AElig;&Uacute;
  TIM_TimeBaseStructure.TIM_Prescaler = 0;    //&Eacute;è&Ouml;&Atilde;&Ocirc;¤·&Ouml;&AElig;&micro;&pound;&ordm;&sup2;&raquo;&Ocirc;¤·&Ouml;&AElig;&micro;&pound;&not;&frac14;&acute;&Icirc;&ordf;72MHz
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;  //&Eacute;è&Ouml;&Atilde;&Ecirc;±&Ouml;&Oacute;·&Ouml;&AElig;&micro;&Iuml;&micro;&Ecirc;&yacute;&pound;&ordm;&sup2;&raquo;·&Ouml;&AElig;&micro;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //&Iuml;ò&Eacute;&Iuml;&frac14;&AElig;&Ecirc;&yacute;&Auml;&pound;&Ecirc;&frac12;

  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  /* PWM1 Mode configuration: Channel1 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;    //&Aring;&auml;&Ouml;&Atilde;&Icirc;&ordf;PWM&Auml;&pound;&Ecirc;&frac12;1
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;    //&Eacute;è&Ouml;&Atilde;&Igrave;&oslash;±&auml;&Ouml;&micro;&pound;&not;&micro;±&frac14;&AElig;&Ecirc;&yacute;&AElig;÷&frac14;&AElig;&Ecirc;&yacute;&micro;&frac12;&Otilde;&acirc;&cedil;&ouml;&Ouml;&micro;&Ecirc;±&pound;&not;&micro;&ccedil;&AElig;&frac12;·&cent;&Eacute;ú&Igrave;&oslash;±&auml;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //&micro;±&para;¨&Ecirc;±&AElig;÷&frac14;&AElig;&Ecirc;&yacute;&Ouml;&micro;&ETH;&iexcl;&Oacute;&Uacute;CCR1_Val&Ecirc;±&Icirc;&ordf;&cedil;&szlig;&micro;&ccedil;&AElig;&frac12;

  TIM_OC1Init(TIM3, &TIM_OCInitStructure); //&Ecirc;&sup1;&Auml;&Uuml;&Iacute;¨&micro;&Agrave;1

  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* PWM1 Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR2_Val; //&Eacute;è&Ouml;&Atilde;&Iacute;¨&micro;&Agrave;2&micro;&Auml;&micro;&ccedil;&AElig;&frac12;&Igrave;&oslash;±&auml;&Ouml;&micro;&pound;&not;&Ecirc;&auml;&sup3;&ouml;&Aacute;í&Iacute;&acirc;&Ograve;&raquo;&cedil;&ouml;&Otilde;&frac14;&iquest;&Otilde;±&Egrave;&micro;&Auml;PWM

  TIM_OC2Init(TIM3, &TIM_OCInitStructure); //&Ecirc;&sup1;&Auml;&Uuml;&Iacute;¨&micro;&Agrave;2

  TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* PWM1 Mode configuration: Channel3 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR3_Val;  //&Eacute;è&Ouml;&Atilde;&Iacute;¨&micro;&Agrave;3&micro;&Auml;&micro;&ccedil;&AElig;&frac12;&Igrave;&oslash;±&auml;&Ouml;&micro;&pound;&not;&Ecirc;&auml;&sup3;&ouml;&Aacute;í&Iacute;&acirc;&Ograve;&raquo;&cedil;&ouml;&Otilde;&frac14;&iquest;&Otilde;±&Egrave;&micro;&Auml;PWM

  TIM_OC3Init(TIM3, &TIM_OCInitStructure); //&Ecirc;&sup1;&Auml;&Uuml;&Iacute;¨&micro;&Agrave;3

  TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* PWM1 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR4_Val;  //&Eacute;è&Ouml;&Atilde;&Iacute;¨&micro;&Agrave;4&micro;&Auml;&micro;&ccedil;&AElig;&frac12;&Igrave;&oslash;±&auml;&Ouml;&micro;&pound;&not;&Ecirc;&auml;&sup3;&ouml;&Aacute;í&Iacute;&acirc;&Ograve;&raquo;&cedil;&ouml;&Otilde;&frac14;&iquest;&Otilde;±&Egrave;&micro;&Auml;PWM

  TIM_OC4Init(TIM3, &TIM_OCInitStructure);  //&Ecirc;&sup1;&Auml;&Uuml;&Iacute;¨&micro;&Agrave;4

  TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(TIM3, ENABLE);    // &Ecirc;&sup1;&Auml;&Uuml;TIM3&Ouml;&Oslash;&Ocirc;&Oslash;&frac14;&Auml;&acute;&aelig;&AElig;÷ARR

  /* TIM3 enable counter */
  TIM_Cmd(TIM3, ENABLE);                //&Ecirc;&sup1;&Auml;&Uuml;&para;¨&Ecirc;±&AElig;÷3
}

那个stm32的pwm输出为什么设置为静态函数啊

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