在使用STM32F103的高级定时器TIM8时，遇到一个问题：初始化的互补PWM波形输出时，同时初始化3对互补通道，CH1，CH1N，CH2，CH2N，CH3，CH3N，使用时，需要将CH1=1，CH1N=0，CH2=0，CH2N=1，到这里都可以实现，但是下面的CH3=1，CH3N=1，不会实现，同时为0倒是会，请问怎么去配置呢？
初始化代码如下： voidTIM8_Configuration(void) //72M { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDefTIM_OCInitStructure; TIM_BDTRInitTypeDefTIM_BDTRInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); TIM_TimeBaseStructure.TIM_Period=99; TIM_TimeBaseStructure.TIM_Prescaler=71; TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1 ; TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_CenterAligned1; TIM_TimeBaseInit(TIM8,&TIM_TimeBaseStructure); //PWM互补信号输出PC6，PA7 TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;//PWM输出模式 TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;//互补输出使能 TIM_OCInitStructure.TIM_Pulse=0;//初始占空比 TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_Low; TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;//死区后输出状态 TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset; TIM_OC1Init(TIM8,&TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM8,TIM_OCPreload_Enable);//PWM输出口PB13 TIM_OC1FastConfig(TIM8,TIM_OCFast_Enable); //PWM互补信号输出PC7，PB0 TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable; TIM_OCInitStructure.TIM_Pulse=0; TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_Low; TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;//死区后输出状态 TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset; TIM_OC2Init(TIM8,&TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM8,TIM_OCPreload_Enable);//PWM输出口PB14 TIM_OC2FastConfig(TIM8,TIM_OCFast_Enable); //PWM互补信号输出PC8，PB1 TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable; TIM_OCInitStructure.TIM_Pulse=0; TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_Low; TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;//死区后输出状态 TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset; TIM_OC3Init(TIM8,&TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM8,TIM_OCPreload_Enable);//PWM输出口PB14 TIM_OC3FastConfig(TIM8,TIM_OCFast_Enable); //死区设置 TIM_BDTRInitStructure.TIM_OSSRState =TIM_OSSRState_Disable;//使能 TIM_BDTRInitStructure.TIM_OSSIState =TIM_OSSIState_Disable;//使能 TIM_BDTRInitStructure.TIM_LOCKLevel =TIM_LOCKLevel_OFF;//不锁任何位 TIM_BDTRInitStructure.TIM_DeadTime =0xCF;//死区设置为5us TIM_BDTRInitStructure.TIM_Break =TIM_Break_Disable;//使能TIM刹车输入 TIM_BDTRInitStructure.TIM_BreakPolarity=TIM_BreakPolarity_High;//TIM刹车输入管脚为高 TIM_BDTRInitStructure.TIM_AutomaticOutput=TIM_AutomaticOutput_Enable;//自动输出功能使能 TIM_BDTRConfig(TIM8,&TIM_BDTRInitStructure); //TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCIdleState_Reset; TIM_ARRPreloadConfig(TIM8,ENABLE); //TIM_CCPreloadControl(TIM8,ENABLE); TIM_CtrlPWMOutputs(TIM8,ENABLE); TIM_Cmd(TIM8,ENABLE); } 主函数如下： intmain(void) { RCC_Configuration();//时钟配置 TIM8_Configuration(); //TIM8初始化 while(1) { TIM8->CCR1=60; //TIM_CCxCmd(TIM8,TIM_Channel_1,TIM_CCx_Disable); //TIM_CCxNCmd(TIM8,TIM_Channel_1,TIM_CCxN_Disable); //TIM_SetCompare2(TIM8,60); //TIM8->CCR2=60; //TIM8->CCR3=60; //TIM_CCxCmd(TIM8,TIM_Channel_2,TIM_CCx_Enable); TIM_CCxNCmd(TIM8,TIM_Channel_2,TIM_CCxN_Enable); TIM_ForcedOC2Config(TIM8,TIM_ForcedAction_InActive); } } 此时使用的是通道CH1和CH2两组互补波形，（示波器是4通道），波形如下图所示： CH1对应TIM8-CH1，CH2对应TIM8-CH1N，CH3对应TIM8-CH2，CH4对应TIM8-CH2N。 从图上可以看到，TIM8-CH2和TIM8-CH2N没有同时指高，请问怎么设置？ | 
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发表于 2018-11-12 21:25:04
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发表于 2018-11-13 01:45:26
