【ST公益分享】STM8 定时器2 占空比

henai521 提问时间：2011-3-23 23:42 /

TIMx_OCMODE_TOGGLE   //此模式或产生任意频率的50%占空比方波 (FOSC/分频系数)/(2*TIM2_Period)
TIMx_OCMODE_PWM1    //PWM模式可设置PWM一周期的时钟数,并调可节占空比
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<ol start="1" class="dp-c"> <li class="alt">#include "stm8s.h"    #include "stm8s_tim2.h"
<li class="alt">#include "stm8s_tim3.h"    u16 CCR1_Val = 300;
<li class="alt">u16 CCR2_Val = 100;    u16 CCR3_Val = 100;
<li class="alt">void main(void)    {
<li class="alt">  CLK_HSECmd(ENABLE);//外部时钟开      CLK_LSICmd(ENABLE);//使能内部低频RC
<li class="alt">  CLK_HSICmd(ENABLE);//使能内部高频RC       CLK_SYSCLKConfig(CLK_PRESCALER_HSIDIV1);//内部高速RC振荡时钟分频
<li class="alt">  CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1);//CPU核心时钟分频         CLK_ClockSwitchCmd(ENABLE); //切换使能
<li class="alt">  CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO ,CLK_SOURCE_HSE,DISABLE,CLK_CURRENTCLOCKSTATE_DISABLE);//切换配置
<li class="alt">  TIM3_TimeBaseInit(TIM3_PRESCALER_1, 1024);
<li class="alt">  TIM3_OC1Init(TIM3_OCMODE_TOGGLE, TIM3_OUTPUTSTATE_ENABLE,CCR1_Val, TIM3_OCPOLARITY_HIGH);//此模式或产生任意频率的50%占空比方波 (FOSC/分频系数)/(2*TIM2_Period)      TIM3_OC1PreloadConfig(ENABLE);
<li class="alt">        TIM3_OC2Init(TIM3_OCMODE_TOGGLE, TIM3_OUTPUTSTATE_ENABLE,CCR1_Val, TIM3_OCPOLARITY_HIGH);//此模式或产生任意频率的50%占空比方波 (FOSC/分频系数)/(2*TIM2_Period)
<li class="alt">  TIM3_OC2PreloadConfig(ENABLE);
<li class="alt">  TIM3_ARRPreloadConfig(ENABLE);      TIM3_Cmd(ENABLE);
<li class="alt">        /* Time base configuration */
<li class="alt">  TIM2_TimeBaseInit(TIM2_PRESCALER_1, 1024);      TIM2_OC1Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE,CCR1_Val, TIM2_OCPOLARITY_HIGH);//PWM模式可设置PWM一周期的时钟数,并调可节占空比
<li class="alt">  TIM2_OC1PreloadConfig(ENABLE);
<li class="alt">  TIM2_OC2Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE,CCR1_Val, TIM2_OCPOLARITY_HIGH);//PWM模式可设置PWM一周期的时钟数,并调可节占空比      TIM2_OC2PreloadConfig(ENABLE);
<li class="alt">  TIM2_ARRPreloadConfig(ENABLE);      TIM2_Cmd(ENABLE);
<li class="alt">      while (1)
<li class="alt">  {        DelayUs(1000);
<li class="alt">    if(CCR1_Val