各位大神，我用T2定时器触发三角波产生，不知为什么没有波形，请大家帮忙看下代码，用的开发板是探索者，谢谢！ [mw_shl_code=c,true]void TIM2_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); ///使能TIM2时钟 TIM_TimeBaseInitStructure.TIM_Period = arr; //自动重装载值 TIM_TimeBaseInitStructure.TIM_Prescaler=psc; //定时器分频 TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数模式 TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1; TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);//初始化TIM2 TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update); TIM_Cmd(TIM2,ENABLE); //使能定时器2 } void Dac1_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; DAC_InitTypeDef DAC_InitType; DAC_DeInit(); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//使能GPIOA时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);//使能DAC时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//模拟输入 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;//下拉 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化 DAC_InitType.DAC_Trigger=DAC_Trigger_T2_TRGO; //使用触发功能T2_TRGO DAC_InitType.DAC_WaveGeneration=DAC_WaveGeneration_Triangle;//使用三角波波形发生 DAC_InitType.DAC_LFSRUnmask_TriangleAmplitude=DAC_TriangleAmplitude_4095;//幅值设置 DAC_InitType.DAC_OutputBuffer=DAC_OutputBuffer_Disable ; //DAC1输出缓存关闭 DAC_Init(DAC_Channel_1,&DAC_InitType); //初始化DAC通道1 DAC_Cmd(DAC_Channel_1, ENABLE); //使能DAC通道1 DAC_SetChannel1Data(DAC_Align_12b_R, 0); //12位右对齐数据格式设置DAC值 DAC_WaveGenerationCmd(DAC_Channel_1,DAC_Wave_Triangle,ENABLE); } int main(void) { NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置系统中断优先级分组2 delay_init(168); //初始化延时函数 uart_init(115200); //初始化串口波特率为115200 TIM2_Int_Init(5000-1,8400-1); //定时器时钟84M，分频系数8400，所以84M/8400=10Khz的计数频率 Dac1_Init(); //DAC通道1初始化 while(1) { } } [/mw_shl_code]