STM32F103C8T6的TIM4为什么不工作呢？

eternity86 · 发表于 2013-7-29 13:28:02

问题如题啊，TIM3库代码，用在STM32F103C8上，TIM2，TIM3都好用，改为TIM4就出问题了，进入不了中断，求解呢？
代码如下：
void TIM3_NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);    NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM3_Configuration(unsigned char timedata)
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3 , ENABLE);
TIM_DeInit(TIM3);
TIM_TimeBaseStructure.TIM_Period=10000/timedata;//(10000-timedata);//5*timedata;      /* 自动重装载寄存器周期的值(计数值)介于0x0000到0xffff之间 */
/* 累计 TIM_Period个频率后产生一个更新或者中断 */
TIM_TimeBaseStructure.TIM_Prescaler= (72 - 1); /* 时钟预分频数 72M/72 介于0x0000到0xffff之间 */
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; /* 采样分频 */
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; /* 向上计数模式 */
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_ClearFlag(TIM3, TIM_FLAG_Update); /* 清除溢出中断标志 */
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
TIM_Cmd(TIM3, ENABLE); /* 开启时钟 */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3 , DISABLE); /*先关闭等待使用*/
}
中断函数：
void TIM3_IRQHandler(void)
{ if ( TIM_GetITStatus(TIM3 , TIM_IT_Update) != RESET )
{
TIM_ClearITPendingBit(TIM3 , TIM_FLAG_Update);
       tim3_factor++;
GPIO_ResetBits(GPIOB,GPIO_Pin_0 |GPIO_Pin_1);
}
if(tim3_factor==100)  tim3_factor=0; }
Main中：
TIM3_NVIC_Configuration();
TIM3_Configuration(50);
START_TIME3;
TIM2，TIM3都好用，改为TIM4就出问题了，TIM4不工作，求解~

eternity86 · 发表于 2013-7-29 13:38:01

用原子哥的改成如下TIM4也不行，郁闷啊~~~
void Timerx_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //时钟使能

TIM_TimeBaseStructure.TIM_Period = 5000; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值计数到5000为500ms
TIM_TimeBaseStructure.TIM_Prescaler =(7200-1); //设置用来作为TIMx时钟频率除数的预分频值  10Khz的计数频率
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

TIM_ITConfig(  //使能或者失能指定的TIM中断
TIM4, //TIM2
TIM_IT_Update  |  //TIM 中断源
TIM_IT_Trigger,   //TIM 触发中断源
ENABLE  //使能
);
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;  //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  //从优先级3级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure);  //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

TIM_Cmd(TIM4, ENABLE);  //使能TIMx外设

}