ADC触发源改为定时器无效

陈加勇

#include "./adc/bsp_adc.h"


__IO uint16_t ADC_ConvertedValue;


static void Rheostat_ADC_GPIO_Config(void)
{
        GPIO_InitTypeDef GPIO_InitStructure;
       

        RCC_AHB1PeriphClockCmd(RHEOSTAT_ADC_GPIO_CLK, ENABLE);
       
        GPIO_InitStructure.GPIO_Pin = RHEOSTAT_ADC_GPIO_PIN;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;            
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
        GPIO_Init(RHEOSTAT_ADC_GPIO_PORT, &GPIO_InitStructure);                       
}


static void Rheostat_ADC_Mode_Config(void)
{
        DMA_InitTypeDef DMA_InitStructure;
        ADC_InitTypeDef ADC_InitStructure;
  ADC_CommonInitTypeDef ADC_CommonInitStructure;
       

        RCC_APB2PeriphClockCmd(RHEOSTAT_ADC_CLK , ENABLE);


  RCC_AHB1PeriphClockCmd(RHEOSTAT_ADC_DMA_CLK, ENABLE);

        DMA_InitStructure.DMA_PeripheralBaseAddr = RHEOSTAT_ADC_DR_ADDR;       

        DMA_InitStructure.DMA_Memory0BaseAddr = (u32)&ADC_ConvertedValue;  

        DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;       

        DMA_InitStructure.DMA_BufferSize = 1;       

        DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

        DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;

        DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;

        DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;       

        DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;

        DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;  

  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;  
       
  DMA_InitStructure.DMA_Channel = RHEOSTAT_ADC_DMA_CHANNEL;

        DMA_Init(RHEOSTAT_ADC_DMA_STREAM, &DMA_InitStructure);

  DMA_Cmd(RHEOSTAT_ADC_DMA_STREAM, ENABLE);


  ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;

  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;

  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
       
       
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;  
  ADC_CommonInit(&ADC_CommonInitStructure);
       

  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;

  ADC_InitStructure.ADC_ScanConvMode = DISABLE;

  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;

  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;

  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2;

  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

  ADC_InitStructure.ADC_NbrOfConversion = 1;  

  ADC_Init(RHEOSTAT_ADC, &ADC_InitStructure);

  ADC_RegularChannelConfig(RHEOSTAT_ADC, RHEOSTAT_ADC_CHANNEL, 1, ADC_SampleTime_3Cycles);

  ADC_DMARequestAfterLastTransferCmd(RHEOSTAT_ADC, ENABLE);

  ADC_DMACmd(RHEOSTAT_ADC, ENABLE);

  ADC_Cmd(RHEOSTAT_ADC, ENABLE);  

}




void TIM2_CH2_Config(void)
{
       
          TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
                TIM_OCInitTypeDef TIM_OCInitStructure;
       
                RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);            
       
                TIM_TimeBaseInitStructure.TIM_ClockDivision = 0x0;
                TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
                TIM_TimeBaseInitStructure.TIM_Period = 9999;
                TIM_TimeBaseInitStructure.TIM_Prescaler = 0;
               
                TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
       
                TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
                TIM_OCInitStructure.TIM_OCIdleState = TIM_OutputState_Enable;
                TIM_OCInitStructure.TIM_Pulse = 5000;
                TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
       
                TIM_OC2Init(TIM2,&TIM_OCInitStructure);
                TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
       
                TIM_Cmd(TIM2,ENABLE);
}

------------------------------------------------------------------------------------------------------
时钟源我选的是TIM2，配置大概是对的。但采样输出的结果全部是0，请问这是怎么回事？

fire

帮顶                    

陈加勇

这个问题我自己已经解决了。我在写中断服务函数的时候没有按照启动文件里面定义的函数名，结果就是CPU执行不到中断