按照网上找的程序修改的初始化了其他三个通道ocinit，还是输不出多路pwm波

肖肖萧 · 发表于 2019-7-13 18:15:28

time.c 部分程序
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_4|GPIO_Pin_0|GPIO_Pin_1; //TIM_CH2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO

//初始化TIM3 Channel2 PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
TIM_OC2Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC2
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);  //使能TIM3在CCR2上的预装载寄存器

  TIM_OC1Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC1
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_OC3Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC3
TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_OC4Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC4
TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM3, ENABLE);
TIM_Cmd(TIM3, ENABLE);  //使能TIM3

}
主程序部分
TIM_SetCompare2(TIM3,1798);
TIM_SetCompare1(TIM3,1000);
TIM_SetCompare3(TIM3,1000);
TIM_SetCompare4(TIM3,1000);