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我用TIM1的ch1和ch1N,ch2和ch2N产生两对互补的PWM波，ch3和ch4产生相位相差180度的PWM，但现在问题是产生的互补的PWM波没有问题，但是相位相差180度的PWM波只有一路有波形，另外一路没有输出（始终是低），相位相差180度的ch3和ch4的初始化配置如下： GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; /* GPIOA clocks enable */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); /* TIM1 clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA,&GPIO_InitStructure); /* Connect TIM pins to AF6 */ GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_6); GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_6); /* Time Base configuration */ TIM_TimeBaseStructure.TIM_Prescaler = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1; TIM_TimeBaseStructure.TIM_Period = 600; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; TIM_OCInitStructure.TIM_Pulse = 200; TIM_OC3Init(TIM1,&TIM_OCInitStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; TIM_OCInitStructure.TIM_Pulse = 400; TIM_OC4Init(TIM1,&TIM_OCInitStructure); TIM_CtrlPWMOutputs(TIM1, ENABLE); TIM_Cmd(TIM1,ENABLE); 求高手帮忙指点，谢谢。 |
是因为你搞错引脚了吗？
每个引脚都可以被配置为AF模式吧