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滴答18b20 

记得添加.H文件~

没添加.H文件  按重置键调试助手只会显示双引号内容~如“config done...”

#include "stm32f10x.h"
#include "stm32_eval.h"
#include    
volatile int flag;
#define Set_B20()	 GPIO_SetBits(GPIOC, GPIO_Pin_12)//上拉关闭pc12
#define Reset_B20()	 GPIO_ResetBits(GPIOC, GPIO_Pin_12)//下拉打开pc12
#define Read_B20()	 GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12)//读pc状态
unsigned char Error_Flag=0;
unsigned char zf=0;
GPIO_InitTypeDef   GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;

/**************延时函数*******************/  
void delay_us(u32 n)    
{    
    u8 j;    
    while(n--)    
    for(j=0;j<10;j++);    
}      
void  delay_ms(u32 n)    
{    
    while(n--)    
    delay_us(1000);    
} 

void SysTick_Configuration(void)
{
  /* Setup SysTick Timer for 10 msec interrupts  */
  if (SysTick_Config(48000))              
  { 
    /* Capture error */ 
    while (1);
  }  
 /* Configure the SysTick handler priority */
  NVIC_SetPriority(SysTick_IRQn, 0x0);        
}

void RCC_Configuration(void)
{
	RCC_DeInit();//将RCC寄存器重设为缺省值     
  RCC_HSICmd(ENABLE);//使能内部高速晶振  
  while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);//HSI晶振返回reset  
  RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);//选择HSI作为系统时钟   
  RCC_HSEConfig(RCC_HSE_OFF);//HSE晶振关  
  RCC_LSEConfig(RCC_LSE_OFF);//LSE晶振关  
  RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_9); //  72HMz  
  RCC_PLLCmd(ENABLE);//使能PLL状态  
  while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);  
  RCC_ADCCLKConfig(RCC_PCLK2_Div4);//ADC时钟=PCLK/4  
  RCC_PCLK2Config(RCC_HCLK_Div1);//APB2时钟=HCLK  
  RCC_PCLK1Config(RCC_HCLK_Div2);//APB1时钟=HCLK/2  
  RCC_HCLKConfig(RCC_SYSCLK_Div1);//AHB时钟=系统时钟  
  RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);//选择PLL作为系统时钟  
  while(RCC_GetSYSCLKSource() != 0x08);  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);  
  GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG  
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;  
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  
  GPIO_Init(GPIOD, &GPIO_InitStructure);  
  GPIO_ResetBits(GPIOD,GPIO_Pin_2);//关闭蜂鸣器  
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);
  GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
	GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
} 

void USART_int(long BaudRate)
{
	  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    /* PA10 USART1_Rx  */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
  /* USARTx configured as follow:
        - BaudRate = 115200 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
  USART_InitStructure.USART_BaudRate = BaudRate;
  USART_InitStructure.USART_BaudRate = BaudRate;//usart传输波比特  
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;//一帧传输或接收8bit  
  USART_InitStructure.USART_StopBits = USART_StopBits_1;//在帧结尾传输1个停止位  
  USART_InitStructure.USART_Parity = USART_Parity_No;//奇偶失能  
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//硬件流控制失能  
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接收使能，发送使能  
  USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;//时钟低电平活动          
  USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;//始终低电平         
  USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;//时钟第二边缘进行数据捕获             
  USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;//最后一位数据的时钟不从SCLK输出  
  USART_ClockInit(USART1, &USART_ClockInitStructure);//使能USART1时钟  
  USART_Init(USART1, &USART_InitStructure);//初始化USART1  
  USART_Cmd(USART1, ENABLE);//使能USART1外设  
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//使能中断  
  USART_Cmd(USART1, ENABLE);
}

void delay_18b20(u32 nus)//18b20专属延时
{
	u16 i;
	while(nus--)
		for(i=12;i>0;i--);
}

void Init18B20(void)//初始化
{
  u8 aa=0;
  u8 count =0;
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  Set_B20() ;
  delay_18b20(1);
  Reset_B20();

  delay_18b20(480);
  Set_B20();
//	delay_18b20(500);
  delay_18b20(480);

	count=0;
	aa=Read_B20();
    while(!aa && count<100)	 
   {
   	aa=Read_B20();
	count++;
   }
   if(count>=99)
   		Error_Flag=1;
	else
		Error_Flag=0;
   
}
  
unsigned char Read18B20(void)//按位读取数据
{  
unsigned char i=0;
unsigned char date=0;
u8 tempp;
   for(i=8;i>0;i--)
   {
   Reset_B20();//打开pc12
   date>>=1;//标识右移一位
   delay_18b20(1);
   Set_B20(); //关闭pc12
   delay_18b20(1);
   tempp=Read_B20();//温度读取
		 
   if(tempp)
   date|=0x80; 
	 delay_18b20(60);
	}
	return(date);
}
void Write18B20(unsigned char date)//读数据
{
	unsigned char i=0;

	for (i=8; i>0; i--)
	{
		Reset_B20(); 
		delay_18b20(1); 		
		if(date & 0x01)			
		{	
			Set_B20();
		}
		else
		{	Reset_B20();}
		delay_18b20(60);
		date>>=1; 	 
		Set_B20();
		delay_18b20(1);
			
	}
	delay_18b20(15);
}

 float Read_T()//读温度
{	
	unsigned char TUp,TDown;
	unsigned char fTemp;
	u8 TT=0;

	float Temp = 0;
	Init18B20();
	Write18B20(0xcc); 	  
	Write18B20(0x44); 	 
	Init18B20();
	Write18B20(0xcc); 	
	Write18B20(0xbe); 	
	TDown = Read18B20();   	
	TUp = Read18B20();   	
	
	if(TUp>0x7f)      
	{
		TDown=~TDown;  
		TUp=~TUp+1; 
		TUp/=8;		     
		zf=1;         
 	}
	else
		zf=0;	  

	fTemp=TDown&0x0f;		
	TUp<<=4;
	TDown>>=4;
	TT=TUp|TDown;
	Temp=TT+(float)fTemp/16;		
	return(Temp);
}
                                 
int main(void)
{
  char ID[8];  
  int i;  
  RCC_Configuration();  
  USART_int(115200);  
  SysTick_Configuration();  
  printf(" config done...\r\n");  

  delay_ms(1000);    
  Init18B20();
  Write18B20(0x33); 
  delay_18b20(20);  
  for(i=0;i<8;i++) //大神说这里要用for语句，不然只会输出printf（"event 1 oc......\r\n")这句,不会继续运行
{
	ID[i] = Read18B20();//读取地址
}
  while(1)  
    {
			if(flag == 300)  
        {  
          printf("At the moment of ID is:")   ;   
          for(i=0;i<8;i++)       
        {  
          printf("%u",ID[i]);
        }  
          printf("\r\n")  ;  
        }  
        if(flag == 500)  
        {             
          printf("The Temperature is:%f\r\n",Read_T());//读取温度并输出
          printf("===================================================\r\n");  
    }  
    }  
}  
  

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

#endif

#ifdef __GNUC__
  /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
     set to 'Yes') calls __io_putchar() */
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
  
PUTCHAR_PROTOTYPE
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the USART */
  USART_SendData(EVAL_COM1, (uint8_t) ch);

  /* Loop until the end of transmission */
  while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
  {}

  return ch;
}

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

#endif

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
 

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