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/** 
  ****************************************************************************** 
  * @file    EXTI/EXTI_Config/main.c  
  * @author  MCD Application Team 
  * @version V3.5.0 
  * @date    08-April-2011 
  * @brief   Main program body 
  ****************************************************************************** 
  * @attention 
  * 
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS 
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE 
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY 
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING 
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE 
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. 
  * 
  * 
 
    ?COPYRIGHT 2011 STMicroelectronics 
 
****************************************************************************** 
  */   
  
/* Includes ------------------------------------------------------------------*/  
#include "stm32f10x.h"  
#include "stm32_eval.h"  
//#include "delay.h"  
#include <stdio.h>  
volatile int flag;  
#define Set_B20()    GPIO_SetBits(GPIOC, GPIO_Pin_12)      
#define Reset_B20()  GPIO_ResetBits(GPIOC, GPIO_Pin_12)  
#define Read_B20()   GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12)  
unsigned char Error_Flag=0;  
unsigned char zf=0;  
void SysTick_Configuration(void)  
{  
  /* Setup SysTick Timer for 10 msec interrupts  */  
  if (SysTick_Config(48000))                //SysTick??  
  {   
    /* Capture error */   
    while (1);  
  }    
 /* Configure the SysTick handler priority */  
  NVIC_SetPriority(SysTick_IRQn, 0x0);                       //SysTick?????  
}  
  
  
/** @addtogroup STM32F10x_StdPeriph_Examples 
  * @{ 
  */  
  
/** @addtogroup EXTI_Config 
  * @{ 
  */   
  
/* Private typedef -----------------------------------------------------------*/  
/* Private define ------------------------------------------------------------*/  
/* Private macro -------------------------------------------------------------*/  
/* Private variables ---------------------------------------------------------*/  
GPIO_InitTypeDef   GPIO_InitStructure;  
USART_InitTypeDef USART_InitStructure;  
USART_ClockInitTypeDef USART_ClockInitStructure;  
  
void RCC_Configuration(void)  
{  
  RCC_DeInit();                
      
  RCC_HSICmd(ENABLE);            
  while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);     
    
  RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);   
    
  RCC_HSEConfig(RCC_HSE_OFF);   
  RCC_LSEConfig(RCC_LSE_OFF);      
      
    //******48MHZ*******//  
      
  RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_6);//6*8=24MHz     
      
  //************************************//    
      
  RCC_PLLCmd(ENABLE);             
  while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);        //检查指定的RCC标志位（PLL）设置与否  
  RCC_ADCCLKConfig(RCC_PCLK2_Div4);                     //设置ADC时钟频率    
  RCC_PCLK2Config(RCC_HCLK_Div1);                       //  APB2=HCLK/1   PCLK2=HCLK/1
  RCC_PCLK1Config(RCC_HCLK_Div2);            /// APB1=HCLK/2    PCLK1=HCLK/2
  RCC_HCLKConfig(RCC_SYSCLK_Div1);         //  AHB使用系统时钟  HCLK=SYSCLK   
  RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);       // 配置系统时钟    
  while(RCC_GetSYSCLKSource() != 0x08)        //检查是否将HES 6倍频后作为系统时钟
  
      
//  SystemInit();  
      
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);     
 GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG       
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);       
    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;//LED  
  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); //TIM2 
}   
  
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_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_Rx | USART_Mode_Tx;
    USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;     
    USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;      
    USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;    
    USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
    USART_ClockInit(USART1, &USART_ClockInitStructure);  
  USART_Init(USART1, &USART_InitStructure);
  USART_Cmd(USART1, ENABLE); 
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
 USART_Cmd(USART1, ENABLE);  
}  
  
void delay_18b20(u32 nus)    //18b20延时  
{  
    u16 i;  
    while(nus--)  
        for(i=12;i>0;i--);  
}  
void delay_us(u32 n) //延时    
{     
    u8 j;     
    while(n--)     
    for(j=0;j<10;j++);     
}     
  
void  delay_ms(u32 n)     
{     
    while(n--)     
    delay_us(1000);     
}  
  
  
      
void Init18B20(void)  //18B20 
{  
   u8 aa=0;  
   u8 count =0;  
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);//使能GPIOC时钟
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;  
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;//开漏输出 
  GPIO_Init(GPIOC, &GPIO_InitStructure);  
   Set_B20() ;   // GPIO_SetBits(GPIOC, GPIO_Pin_12)   
   delay_18b20(1);  
   Reset_B20(); // GPIO_ResetBits(GPIOC, GPIO_Pin_12)
  
   delay_18b20(480);  
   Set_B20();  
//  delay_18b20(500);  
   delay_18b20(480);  
  
    count=0;  
    aa=Read_B20();         //读取温度 
    while(!aa && count<100) //温度不宜超过99°C    
   {  
    aa=Read_B20();  
    count++;           
   }  
   if(count>=99)  
        Error_Flag=1;  
    else  
        Error_Flag=0;  
     
}  
    
unsigned char Read18B20(void)//读数据 
{    
unsigned char i=0;  
unsigned char date=0;  
u8 tempp;  
   for(i=8;i>0;i--)  
   {  
  
   Reset_B20();   // GPIO_ResetBits(GPIOC, GPIO_Pin_12)
   date>>=1;    //右移一位  
   delay_18b20(1);  
   Set_B20();    //置1  
    delay_18b20(1);  
   tempp=Read_B20(); //读取温度 
  
   if(tempp)  
        date|=0x80;// 1000 0000将最高位填1 ，然后右移，每次最高位由0变1，使8位全部传递完毕 0xff = 1111 1111   
    delay_18b20(60);  
    }  
    return(date);  
}  
void Write18B20(unsigned char date)//写数据  
{  
    unsigned char i=0;  
  
    for (i=8; i>0; i--)  
    {  
        Reset_B20(); //置0  
        delay_18b20(1);           
        if(date & 0x01)           
        {     
            Set_B20();  
        }  
        else  
        {   Reset_B20();}  
        delay_18b20(60);  
        date>>=1;       //数据右移一位 
         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();     //18B20的初始化
    Write18B20(0xcc);//写指令：跳过ROM,仅一个DS18B20       
    Write18B20(0x44);//启动温度转换      
    Init18B20();  
    Write18B20(0xcc);//写指令：跳过ROM,仅一个DS18B20       
    Write18B20(0xbe);//读暂存寄存器     
    TDown = Read18B20();//低字节      
    TUp = Read18B20();//高字节        
      
    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)  
{  
          
  /*!< At this stage the microcontroller clock setting is already configured,  
       this is done through SystemInit() function which is called from startup 
       file (startup_stm32f10x_xx.s) before to branch to application main. 
       To reconfigure the default setting of SystemInit() function, refer to 
       system_stm32f10x.c file 
     */       
         
  /* System Clocks Configuration */  
    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++)
    {  
        ID[i] = Read18B20();  
    }  
      
    while(1)  
    {  
        if(flag == 300)  
        {  
            printf("At the moment of ID is:");// 每300ms输出ID  
            for(i=0;i<8;i++)       
        {  
          printf("%x",ID[i]);
        }  
            printf("\r\n")  ;  
        }  
        if(flag == 500)  
        {             
            printf("The Temperature is:%f\r\n",Read_T());//每500ms输出温度 
            printf("===================================================\r\n");  
    }  
    }  
}  
  
  
  
#ifdef  USE_FULL_ASSERT  
  
/** 
  * @brief  Reports the name of the source file and the source line number 
  *         where the assert_param error has occurred. 
  * @param  file: pointer to the source file name 
  * @param  line: assert_param error line source number 
  * @retval None 
  */  
void assert_failed(uint8_t* file, uint32_t line)  
{   
  /* User can add his own implementation to report the file name and line number, 
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */  
  
  /* Infinite loop */  
  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__ */  
    
  
  
/** 
  * @brief  Retargets the C library printf function to the USART. 
  * @param  None 
  * @retval None 
  */  
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  
  
/** 
  * @brief  Reports the name of the source file and the source line number 
  *         where the assert_param error has occurred. 
  * @param  file: pointer to the source file name 
  * @param  line: assert_param error line source number 
  * @retval None 
  */  
void assert_failed(uint8_t* file, uint32_t line)  
{   
  /* User can add his own implementation to report the file name and line number, 
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */  
  
  /* Infinite loop */  
  while (1)  
  {  
  }  
}  
  
#endif  
  
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/