请教STM32 F103VET6 TIM5 PWM 输出问题。

txmsszd

我使用STM32 F103VET 的定时器TIM5输出PWM，软件仿真没有输出。
但是如果用TIM2或TIM3都有输出。
请问可能原因是什么？
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代码

[mw_shl_code=c,true]static void TIM5_GPIO_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; /* TIM5 clock enable */[/mw_shl_code] [mw_shl_code=c,true] RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE); /* GPIOA and GPIOB clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_AFIO, ENABLE); /*GPIOA Configuration: TIM5 channel 1 and 2 as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // ???????ì???? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /*GPIOB Configuration: TIM5 channel 3 and 4 as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; GPIO_Init(GPIOA, &GPIO_InitStructure); } static void TIM5_Mode_Config(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; /* ----------------------------------------------------------------------- TIM5 Configuration: generate 4 PWM signals with 4 different duty cycles: TIM5CLK = 72 MHz, Prescaler = 0x0, TIM5 counter clock = 72 MHz TIM5 ARR Register = 999 => TIM5 Frequency = TIM5 counter clock/(ARR + 1) TIM5 Frequency = 72 KHz. TIM5 Channel1 duty cycle = (TIM5_CCR1/ TIM5_ARR)* 100 = 50% TIM5 Channel2 duty cycle = (TIM5_CCR2/ TIM5_ARR)* 100 = 37.5% TIM5 Channel3 duty cycle = (TIM5_CCR3/ TIM5_ARR)* 100 = 25% TIM5 Channel4 duty cycle = (TIM5_CCR4/ TIM5_ARR)* 100 = 12.5% ----------------------------------------------------------------------- */ /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = 65535; TIM_TimeBaseStructure.TIM_Prescaler = 5; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure); /* PWM1 Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR1_Val; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OC1Init(TIM5, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM5, TIM_OCPreload_Disable); /* PWM1 Mode configuration: Channel2 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR2_Val; TIM_OC2Init(TIM5, &TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM5, TIM_OCPreload_Disable); /* PWM1 Mode configuration: Channel3 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OC3Init(TIM5, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM5, TIM_OCPreload_Disable); /* PWM1 Mode configuration: Channel4 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR4_Val; TIM_OC4Init(TIM5, &TIM_OCInitStructure); TIM_OC4PreloadConfig(TIM5, TIM_OCPreload_Disable); //TIM_ARRPreloadConfig(TIM5, ENABLE); /* TIM5 enable counter */ TIM_Cmd(TIM5, ENABLE); TIM_ITConfig(TIM5,TIM_IT_CC1|TIM_IT_CC2|TIM_IT_CC3|TIM_IT_CC4,ENABLE); } void TIM5_PWM_Init(void) { TIM5_GPIO_Config(); TIM5_Mode_Config(); } void TIM5_NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); NVIC_InitStructure.NVIC_IRQChannel=TIM5_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; //NVIC_IRQChannelPreemptionPriority NVIC_InitStructure.NVIC_IRQChannelSubPriority=1; NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_Init(&NVIC_InitStructure); }[/mw_shl_code]

timer5的

timer2的。貌似TIM2_CH3也不行。

谢谢！

正点原子

TIM5不支持软件仿真.