写stm32f103c8t6驱动adxl335 的代码

好的，下面是使用STM32F103C8T6驱动ADXL335的代码示例，代码中使用的是ADC采集：

#include "stm32f10x.h"
#include "stdio.h"

#define ADC1_DR_Address    ((u32)0x4001244C)

GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
USART_InitTypeDef USART_InitStructure;

__IO uint16_t ADCConvertedValue[3];
float x, y, z;

void RCC_Configuration(void);
void GPIO_Configuration(void);
void ADC_Configuration(void);
void DMA_Configuration(void);
void USART_Configuration(void);
void NVIC_Configuration(void);
void Delay(__IO uint32_t nCount);

int main(void)
{
  RCC_Configuration();
  GPIO_Configuration();
  ADC_Configuration();
  DMA_Configuration();
  USART_Configuration();
  NVIC_Configuration();

  ADC_SoftwareStartConvCmd(ADC1, ENABLE);
  while (1)
  {
    Delay(0xFFFFF);

    x = (float)(ADCConvertedValue[0] - 336) / 675;
    y = (float)(ADCConvertedValue[1] - 336) / 675;
    z = (float)(ADCConvertedValue[2] - 336) / 675;

    printf("X:%.2f Y:%.2f Z:%.2f\r\n", x, y, z);
  }
}

void RCC_Configuration(void)
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1 | RCC_APB2Periph_AFIO, ENABLE);
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
}

void GPIO_Configuration(void)
{
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void ADC_Configuration(void)
{
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 3;
  ADC_Init(ADC1, &ADC_InitStructure);

  ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_55Cycles5);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_55Cycles5);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 3, ADC_SampleTime_55Cycles5);

  ADC_Cmd(ADC1, ENABLE);

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

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

void DMA_Configuration(void)
{
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADCConvertedValue;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = 3;
  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_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);

  DMA_Cmd(DMA1_Channel1, ENABLE);
}

void USART_Configuration(void)
{
  USART_InitStructure.USART_BaudRate = 9600;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Tx;
  USART_Init(USART2, &USART_InitStructure);
  USART_Cmd(USART2, ENABLE);
}

void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void Delay(__IO uint32_t nCount)
{
  while(nCount--){}
}

#ifdef USE_FULL_ASSERT

void assert_failed(uint8_t* file, uint32_t line)
{
  while (1)
  {
  }
}
#endif

这段代码使用了ADC采集，使用ADXL335的三个输出信号（X、Y、Z轴）分别连接到了PA0、PA1、PA2引脚上。使用DMA将ADC数据存储在ADCConvertedValue数组中，然后计算出X、Y、Z轴的值并通过USART发送出去。

注意：这里只是一个简单的示例代码，实际使用中需要根据具体情况进行修改和优化。