给我一个stm32F103的使用ADC采样DAC输出的keil程序

好的，以下是一个基于STM32F103的使用ADC采样DAC输出的Keil程序示例：

#include "stm32f10x.h"

#define ADC1_DR_Address    ((u32)0x4001244C)
#define DAC_DHR12R1_Address   ((u32)0x40007408)

void RCC_Configuration(void);
void GPIO_Configuration(void);
void ADC_Configuration(void);
void DAC_Configuration(void);

int main(void)
{
  RCC_Configuration();
  GPIO_Configuration();
  ADC_Configuration();
  DAC_Configuration();

  while (1)
  {
    ADC_SoftwareStartConvCmd(ADC1, ENABLE);
    while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET); 
    DAC_SetChannel1Data(DAC1, DAC_Align_12b_R, ADC_GetConversionValue(ADC1)>>4); 
  }
}

void RCC_Configuration(void)
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1 | RCC_APB2Periph_AFIO, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
}

void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  // Configure PA1 as analog input
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void ADC_Configuration(void)
{
  ADC_InitTypeDef ADC_InitStructure;

  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 1;
  ADC_Init(ADC1, &ADC_InitStructure);

  ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_55Cycles5);

  ADC_Cmd(ADC1, ENABLE);

  ADC_ResetCalibration(ADC1);
  while(ADC_GetResetCalibrationStatus(ADC1));

  ADC_StartCalibration(ADC1);
  while(ADC_GetCalibrationStatus(ADC1));
}

void DAC_Configuration(void)
{
  DAC_InitTypeDef DAC_InitStructure;

  DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
  DAC_Init(DAC1, &DAC_InitStructure);

  DAC_Cmd(DAC1, ENABLE);
}

这个程序通过ADC采集PA1引脚的模拟数据，并使用DAC输出转换后的数字数据。请注意，这个示例程序没有使用DMA。如果你想使用DMA，你需要在程序中添加DMA初始化和中断处理函数。