STM32刹车功能

菜鸟CC · 发表于 2017-7-3 17:10:29

请问各位大神，我参照网上的代码，配了一个刹车功能，但是我调试的时候，就是进不了刹车中断，请问是什么原因呢，代码如下

void TIM1_Init_All(u16 arr, u16 psc)
{
GPIO_InitTypeDef       GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_OCInitTypeDef    TIM_OCInitStructure;
TIM_BDTRInitTypeDef    TIM_BDTRInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB,ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
// GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);

TIM_DeInit(TIM1);
TIM_TimeBaseInitStructure.TIM_Period = arr;
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure);

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_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Set;  //这里对应的是OISxN寄存器，当MOE为0时的电平

TIM_OC1Init(TIM1, &TIM_OCInitStructure);
//TIM_OC2Init(TIM1, &TIM_OCInitStructure);
//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 = 0x48;
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable;    //开启刹车功能
//TIM1->BDTR |= (1 << 12);
delay_us(10);    //这里的设置需要一个小延时
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;    //刹车输入高电平有效
delay_us(10);
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
delay_us(10);
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

TIM1_BKE_Config(); //刹车中断配置

TIM_ARRPreloadConfig(TIM1, ENABLE);

TIM_CCPreloadControl(TIM1,ENABLE);

TIM_Cmd(TIM1, ENABLE);

TIM_CtrlPWMOutputs(TIM1, ENABLE);
}

void TIM1_BKE_Config(void)
{
NVIC_InitTypeDef             NVIC_InitStruct;
GPIO_InitTypeDef       GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 ;
//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);    //BKE引脚，设置为浮空输入

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);

GPIO_ResetBits(GPIOB,GPIO_Pin_11);    //先将引脚设置为低，因为后面的刹车输入是高电平

//刹车中断配置
NVIC_InitStruct.NVIC_IRQChannel = TIM1_BRK_IRQn;

NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;    //相应优先级
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);

}

void TIM1_BKE_Config(void)
{
NVIC_InitTypeDef             NVIC_InitStruct;
GPIO_InitTypeDef       GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 ;
//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);    //BKE引脚，设置为下拉输入

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);

GPIO_ResetBits(GPIOB,GPIO_Pin_11);    //先将引脚设置为低，因为后面的刹车输入是高电平

//刹车中断配置
NVIC_InitStruct.NVIC_IRQChannel = TIM1_BRK_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);

}

//刹车中断函数
void TIM1_BRK_IRQHandler(void)
{

if(TIM_GetITStatus(TIM1,TIM_IT_Break) != RESET)
{
      TIM_ClearITPendingBit(TIM1,TIM_IT_Break);    //清除定时器1的刹车中断标志
      printf("进入刹车中断\r\n");
}
}

int mian(void)
{
delay_init();
delay_us(200);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);// 设置中断优先级分组2
uart_init(9600);
TIM1_Init_All(7199,999);
TIM_SetCompare1(TIM1,(7199 + 1)/2);
PB_11 = 1;    //这里的PB11和PB12相连，然后通过将PB_11设置输出为高电平，从而触发刹车中断
while(1);
}

现在是检测到PB_12为高，但是进不了刹车中断，PWM的波形也一直有输出。