問題如標(biāo)題，以下是我程序

#include?"debug.h"
#include?"string.h"

#define?FFT_len?128

uint8_t?ADC_measure_flag?=?0;//ADC測量完成?標(biāo)志位
int16_t?ADC_buff[FFT_len];

void?GPIO_Toggle_INIT()
{
????GPIO_InitTypeDef?GPIO_InitStructure?=?{0};

????RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,?ENABLE);
????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_10;
????GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_Out_PP;
????GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz;
????GPIO_Init(GPIOA,?&GPIO_InitStructure);
}
void?TIM2_Init(u16?arr,?u16?psc)
{
????TIM_TimeBaseInitTypeDef?TIM_TimeBaseInitStructure?=?{0};

????RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,?ENABLE);

????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_TimeBaseInitStructure.TIM_RepetitionCounter?=?0;
????TIM_TimeBaseInit(TIM2,?&TIM_TimeBaseInitStructure);

????//TIM_ARRPreloadConfig(TIM2,?ENABLE);
????TIM_SelectOutputTrigger(TIM2,TIM_TRGOSource_Update);
????TIM_Cmd(TIM2,ENABLE);
}
void?DMA_ADC_Init(DMA_Channel_TypeDef?*DMA_CHx,?u32?ppadr,?u32?memadr,?u16?bufsize)
{
????DMA_InitTypeDef?DMA_InitStructure?=?{0};
????NVIC_InitTypeDef?NVIC_InitStructure={0};

????RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,?ENABLE);

????DMA_DeInit(DMA_CHx);
????DMA_InitStructure.DMA_PeripheralBaseAddr?=?ppadr;
????DMA_InitStructure.DMA_MemoryBaseAddr?=?memadr;
????DMA_InitStructure.DMA_DIR?=?DMA_DIR_PeripheralSRC;
????DMA_InitStructure.DMA_BufferSize?=?bufsize;
????DMA_InitStructure.DMA_PeripheralInc?=?DMA_PeripheralInc_Disable;
????DMA_InitStructure.DMA_MemoryInc?=?DMA_MemoryInc_Enable;
????DMA_InitStructure.DMA_PeripheralDataSize?=?DMA_PeripheralDataSize_HalfWord;
????DMA_InitStructure.DMA_MemoryDataSize?=?DMA_MemoryDataSize_HalfWord;
????DMA_InitStructure.DMA_Mode?=?DMA_Mode_Normal;
????DMA_InitStructure.DMA_Priority?=?DMA_Priority_VeryHigh;
????DMA_InitStructure.DMA_M2M?=?DMA_M2M_Disable;
????DMA_Init(DMA_CHx,?&DMA_InitStructure);

????DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,?ENABLE);??????//使能傳輸完成中斷
????NVIC_InitStructure.NVIC_IRQChannel?=?DMA1_Channel1_IRQn;
????NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority?=?0;
????NVIC_InitStructure.NVIC_IRQChannelSubPriority?=?0;
????NVIC_InitStructure.NVIC_IRQChannelCmd?=?ENABLE;
????NVIC_Init(&NVIC_InitStructure);
????DMA_Cmd(DMA1_Channel1?,?ENABLE);??//使能DMA
}
void?ADC_TRGO_Init()
{
????ADC_InitTypeDef??ADC_InitStructure?=?{0};
????GPIO_InitTypeDef?GPIO_InitStructure?=?{0};

????RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA?|?RCC_APB2Periph_ADC1,?ENABLE);

????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_2;
????GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_AIN;
????GPIO_Init(GPIOA,?&GPIO_InitStructure);

????ADC_CLKConfig(ADC1,?ADC_CLK_Div6);
????ADC_DeInit(ADC1);
????ADC_InitStructure.ADC_Mode?=?ADC_Mode_Independent;
????ADC_InitStructure.ADC_ScanConvMode?=?DISABLE;
????ADC_InitStructure.ADC_ContinuousConvMode?=?DISABLE;
????ADC_InitStructure.ADC_ExternalTrigConv?=?ADC_ExternalTrigConv_T2_TRGO;
????ADC_InitStructure.ADC_DataAlign?=?ADC_DataAlign_Right;
????ADC_InitStructure.ADC_NbrOfChannel?=?1;
????ADC_Init(ADC1,?&ADC_InitStructure);

????ADC_RegularChannelConfig(ADC1,?ADC_Channel_2,?1,?ADC_SampleTime_9Cycles);
????ADC_ExternalTrigConvCmd(ADC1,?ENABLE);//設(shè)置外部觸發(fā)模式使能
????ADC_Cmd(ADC1,?ENABLE);
}
void?ADC_DMA_CONF()
{
????memset(ADC_buff,0,sizeof(ADC_buff));
????ADC_TRGO_Init();
????DMA_ADC_Init(DMA1_Channel1,?(u32)&ADC1->RDATAR,?(u32)ADC_buff,?FFT_len);
????ADC_DMACmd(ADC1,?ENABLE);
}
int?main(void)
{
????????u8?i?=?0;
????????
????NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
????SystemCoreClockUpdate();
????Delay_Init();
????GPIO_Toggle_INIT();

????Delay_Ms(300);
????
????TIM2_Init(100,48-1);?//10K
????ADC_DMA_CONF();
????while(1)
????{
????????if(ADC_measure_flag)
????????{
????????????ADC_measure_flag?=?0;
????????????//啟動ADC采集
????????????DMA1_Channel1->CNTR?=?FFT_len;
????????????DMA1_Channel1->MADDR?=?(uint32_t)ADC_buff;
????????????DMA1_Channel1->CFGR?|=?DMA_CFGR1_EN;

????????????GPIO_WriteBit(GPIOA,?GPIO_Pin_10,?(i?==?0)???(i?=?Bit_SET)?:?(i?=?Bit_RESET));
????????}
????}
}
__attribute__((interrupt("WCH-Interrupt-fast")))
void?DMA1_Channel1_IRQHandler()
{?
???if(DMA_GetITStatus(DMA1_IT_TC1)!=RESET)?
???{
???????ADC_measure_flag?=?1;
???????DMA_ClearITPendingBit(DMA1_IT_TC1);
???}
}

你好。我試了一下，并沒有問題.因?yàn)橹袛噙M(jìn)入的太快了，看不出來燈閃爍，用仿真打斷點(diǎn)就可以觀察到了。

?uint8_t ADC_measure_flag = 0;這個(gè)ADC測量完成 標(biāo)志位加上volatile 防止被優(yōu)化。

判斷中加上關(guān)閉中斷并延時(shí)

? ? ? ? if(ADC_measure_flag)

? ? ? ? {

? ? ? ? ? ? __disable_irq();

? ? ? ? ? ? Delay_Ms(500);

? ? ? ? ? ? ADC_measure_flag = 0;

? ? ? ? ? ? //啟動ADC采集

? ? ? ? ? ? DMA1_Channel1->CNTR = FFT_len;

? ? ? ? ? ? DMA1_Channel1->MADDR = (uint32_t)ADC_buff;

? ? ? ? ? ? DMA1_Channel1->CFGR |= DMA_CFGR1_EN;

? ? ? ? ? ? GPIO_WriteBit(GPIOA, GPIO_Pin_10, (i == 0) ? (i = Bit_SET) : (i = Bit_RESET));

? ? ? ? ? ? __enable_irq();

? ? ? ? }

謝謝，加volatile防止ADC_measure_flag 被優(yōu)化后沒問題了