[问答]

为什么STM32F103ZET定时器TIM1无法输出6路PWM呢

问答对人有帮助，内容完整，我也想知道答案 0 为什么STM32F103ZET定时器tiM1无法输出6路PWM呢？怎样去解决这个问题呢？ 0
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答案对人有帮助，有参考价值 0 使用默认引脚输出6路PWM，#define FullRemap_TIM1则重映射 PIN脚；遗留问题：调用TIM_CCxNCmd(TIM1, TIM_Channel_X, TIM_CCx_Enable);导致互补PWM无输出。 TIM_CCxCmd(TIM1, TIM_Channel_X, TIM_CCx);确可以正常开关PWM输出；遇到问题：PA8、10、PB13、14、15均有输出，PA9无输出；问题解决：虽然没初始化UART1模块，但打开RCC_APB2Periph_USART1时钟导致； void Timer1_Init(void) { TIM_OCInitTypeDef TIM_OCInitStructure; GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_BDTRInitTypeDef TIM_BDTRInitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); #ifdef FullRemap_TIM1 GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE); #endif GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8\|GPIO_Pin_9\|GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13\|GPIO_Pin_14\|GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); #ifdef FullRemap_TIM1 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7\|GPIO_Pin_8\|GPIO_Pin_9 \|GPIO_Pin_10\|GPIO_Pin_11\|GPIO_Pin_12\|GPIO_Pin_13\|GPIO_Pin_14; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOE, &GPIO_InitStructure); #endif TIM_TimeBaseStructure.TIM_Period = 5999;//ARR 10K TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_Prescaler = 99;//??????1us TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0000; 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_Enable; TIM_OCInitStructure.TIM_Pulse = 1000;//CCR TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; //关断后PWM默认输出状态 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; TIM_OC1Init(TIM1, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_Pulse = 2000;//CCR TIM_OC2Init(TIM1, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_Pulse = 3000;//CCR TIM_OC3Init(TIM1, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF; TIM_BDTRInitStructure.TIM_DeadTime = 0; TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable; TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable; TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure); NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_ITConfig(TIM1,TIM_IT_Update, ENABLE); TIM_ARRPreloadConfig(TIM1, ENABLE); TIM_ClearITPendingBit(TIM1, TIM_IT_Update); TIM_CtrlPWMOutputs(TIM1, ENABLE); TIM_Cmd(TIM1, ENABLE); //TIM_CCxCmd(TIM1, TIM_Channel_1, TIM_CCx_Enable); //TIM_CCxNCmd(TIM1, TIM_Channel_1, TIM_CCx_Enable); //TIM_CCxCmd(TIM1, TIM_Channel_2, TIM_CCx_Enable); //TIM_CCxNCmd(TIM1, TIM_Channel_2, TIM_CCx_Enable); //TIM_CCxCmd(TIM1, TIM_Channel_3, TIM_CCx_Enable); //TIM_CCxNCmd(TIM1, TIM_Channel_3, TIM_CCx_Enable); } void TIM1_UP_IRQHandler(void) // { if(TIM_GetITStatus(TIM1,TIM_IT_Update)!=RESET) { TIM_ClearITPendingBit(TIM1,TIM_IT_Update); } }

2021-12-14 11:26:06 评论举报王桂兰