求教 ADC外部触发，把我写的程序贴在下面了（库函数）。。。 使用的是mini开发板

高天小圣

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler=4;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period=0XFF;
TIM_TimeBaseStructure.TIM_ClockDivision=0;
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse=0X7F;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;
TIM_OC2Init(TIM2,&TIM_OCInitStructure);

TIM_Cmd(TIM2,ENABLE);
TIM_CtrlPWMOutputs(TIM2,ENABLE); 
/*上面是_ _T2_CC2 外部触发时的TIM2配置，配置为通道2的PWM 模式，验证实验工作正常，即可以触发ADC采集*/

但是我把外部触发换成__T3_CC1时，配置TIM3的通道1和上面一样的套路，为什么实验没有效果呢？？
是TIM3和TIM2有啥区别吗？还有CC1是代表着通道1的捕获吧。。。
                                                                                                                 ——新手，求解答

zhaolei0329

ADC的定时器触发，不支持TIM3_CC1

正点原子

你看adc的触发方式,支不支持TIM3_CC1触发?

高天小圣

回复【2楼】正点原子:
---------------------------------
 ((REGTRIG) == ADC_ExternalTrigConv_T3_CC1) || \

有的啊，我把我的那个ADC配置处的所有代码贴在下面，大神求改正！
最后那部分（/*  */注释的那部分就是T3_CC1的ADC1程序）


/*ADC1扫描模式，外部定时器T2，ADC_ExternalTrigConv_T2_CC2，触发*/

#include "stm32f10x.h"

void adc_init(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
//TIM_OCInitTypeDef TIM_OCInitStructure;
//TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
   TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1, ENABLE );   //ADC1，PA时钟
RCC_ADCCLKConfig(RCC_PCLK2_Div6);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4;    //ADC对应的i/o口的配置
GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);

ADC_DeInit(ADC1);

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;  //连续转换模式给关了，意味着下面得有触发了
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2;   //用TIM3的通道1捕获（PWM）触发，
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;  //PWM一定意义上就是捕获
ADC_InitStructure.ADC_NbrOfChannel = 4;
ADC_Init(ADC1, &ADC_InitStructure);

ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
    ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_239Cycles5);
    ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 3, ADC_SampleTime_239Cycles5);
    ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 4, ADC_SampleTime_239Cycles5);  

ADC_DiscModeChannelCountConfig(ADC1, 2);   //num = 2；
ADC_DiscModeCmd(ADC1, ENABLE); 


ADC_ExternalTrigConvCmd(ADC1, ENABLE);
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);


ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));

//ADC_SoftwareStartConvCmd(ADC1, ENABLE); 


 
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler=4;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period=0XFF;
TIM_TimeBaseStructure.TIM_ClockDivision=0;
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse=0X7F;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;
TIM_OC2Init(TIM2,&TIM_OCInitStructure);

TIM_Cmd(TIM2,ENABLE);
TIM_CtrlPWMOutputs(TIM2,ENABLE); 

/* RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

TIM_TimeBaseInitStructure.TIM_Period = 0xff;
TIM_TimeBaseInitStructure.TIM_Prescaler = 4;
TIM_TimeBaseInitStructure.TIM_ClockDivision = 0;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_Pulse = 0x7f;
TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_Cmd(TIM3, ENABLE);
TIM_CtrlPWMOutputs(TIM3,ENABLE);*/



}