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系统滴答&18B20

系统时钟配置为48MHZ，由滴答控制，300ms输出一次18B20的ID，500ms输出一次温度。

#include "stm32f10x.h"  
#include "stm32_eval.h"  
#include <stdio.h>  
#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) 
volatile int flag;  
unsigned char Error_Flag=0;  
unsigned char zf=0;  
unsigned char ID[8]; 
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 1 msec interrupts  */  
  if (SysTick_Config(48000))                //SysTick配置 48000/48MHZ=1ms 滴答一次  
  {   
    /* Capture error */   
    while (1);  
  }    
 /* Configure the SysTick handler priority */  
  NVIC_SetPriority(SysTick_IRQn, 0x0);                       //SysTick中断优先级  
}  
  
GPIO_InitTypeDef   GPIO_InitStructure;  
USART_InitTypeDef USART_InitStructure;  
USART_ClockInitTypeDef USART_ClockInitStructure;  
#define RCC_PLLSource_HSE_Div1           ((uint32_t)0x00010000)  
  
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);  
  RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_6); // 6*8Mhz= 48MHz  
  RCC_PLLCmd(ENABLE);  
  while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);  
  RCC_ADCCLKConfig(RCC_PCLK2_Div4);  
  RCC_PCLK2Config(RCC_HCLK_Div1);  
  RCC_PCLK1Config(RCC_HCLK_Div2);  
  RCC_HCLKConfig(RCC_SYSCLK_Div1);  
  RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);  
  while(RCC_GetSYSCLKSource() != 0x08)
//  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;  
  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_WordLength = USART_WordLength_8b;//???????8bit  
  USART_InitStructure.USART_StopBits = USART_StopBits_1;//????1  
  USART_InitStructure.USART_Parity = USART_Parity_No;//????  
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//??????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)  
{  
    u16 i;  
    while(nus--)  
        for(i=12;i>0;i--);  
}    
  void Init18B20(void)//18B20初始化  
{  
   u8 b=0;  
   u8 count =0;  
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //GPIOC的复用时钟使能  
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//选择PC12  
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;//开漏输出  
  GPIO_Init(GPIOC, &GPIO_InitStructure);//GPIOC初始化  
   Set_B20() ;  
    /*复位时需要至少480us的低电平*/  
   delay_18b20(1);  
   Reset_B20();  
   delay_18b20(480);  
    /* 探测到上升沿后等待15~60us后18B20发出存在脉冲 */  
   Set_B20();  
   delay_18b20(480);  
  
    count=0;  
    b=Read_B20();//读取18B20的一个字节 赋值给aa  
      
    /*   校验读取值，错误次数大于99才报错 */  
    while(!b && count<100)     
   {  
    b=Read_B20();  
        count++;  
   }  
   if(count>=99)  
        Error_Flag=1;  
    else  
        Error_Flag=0;  
}  
    
unsigned char Read18B20(void)//读取18B20的一个字节  
{    
    unsigned char i=0;  
    unsigned char date=0;  
    u8 tempp;  
   for(i=8;i>0;i--)//按位读取，读取一个字需要循环8次  
   {  
        Reset_B20();//拉低电平  
        date>>=1;//date右移一位  
        delay_18b20(1);  
        Set_B20(); //置高电平  
    delay_18b20(1);  
        tempp=Read_B20();//读取温度值  
        if(tempp)//若读取到的值非0  
    {date|=0x80;} //将date的最高位置1  
        delay_18b20(60);  
    }  
    return(date);  
}  
void Write18B20(unsigned char date)//写入  
{  
    unsigned char i=0;  
  
    for (i=8; i>0; i--)  
    {  
        Reset_B20(); //置低电平  
        delay_18b20(1);           
        if(date & 0x01)     //如果date最低位为1     
        {     
            Set_B20();//置高电平  
        }  
        else//如果date最低位为0  
        {  
            Reset_B20();}//置低电平  
            delay_18b20(60);  
            date>>=1;     //date右移一位  
            Set_B20();//置高电平  
            delay_18b20(1);  
    }  
    delay_18b20(15);  
}  
  
 float Read_T()//读取温度值  
{     
    unsigned char TUp,TDown;  
    unsigned char fTemp;  
    u8 TT=0;  
    float Temp = 0;  
    Init18B20();//1820初始化  
    Write18B20(0xcc); //不提供64位ROM编码使用存储器        
    Write18B20(0x44); //启动一次温度转换       
    Init18B20();//1820初始化  
    Write18B20(0xcc); //不提供64位ROM编码使用存储器      
    Write18B20(0xbe);   //从字节0开始读取暂存器内容  
    /*两次读取温度*/  
    TDown = Read18B20();      
    TUp = Read18B20();        
      
    if(TUp>0x7f)    //  如果TUp的值大于最大值（11111111）bin  
    {  
        TDown=~TDown;  //TDown取反  
        TUp=~TUp+1; //TUp取反加一  
        TUp/=8; //TUp除以8           
        zf=1;    //zf标志位置1       
    }  
    else  
        zf=0;       
    fTemp=TDown&0x0f;//TDown保留后四位，赋值给fTemp    
    TUp<<=4;//TUp左移四位，舍去高四位  
    TDown>>=4;//TDown右移四位，舍去低四位  
    TT=TUp|TDown;//TUp与TDown合并 赋值给TT  
    Temp=TT+(float)fTemp/16;          
    return(Temp);  
}  
                                   
int main(void)  
{  
    int i;  
    RCC_Configuration();  
    USART_int(115200);  
    Init18B20();//初始化18B20  
    SysTick_Configuration();//系统滴答时钟配置  
  
    printf(" config done...\r\n");  
    Write18B20(0x33);//此命令获取18B20的ID  
    for(i=0;i<8;i++)//用一个8位的数组保存id值  
    {  
        ID[i]=Read18B20();  
    }  
    delay_ms(1000);  
    while(1)  
    {}  
}  
  
void SysTick_Handler(void)  
{  
  int i;  
    flag++;  
    if(flag==300)//每300ms输出一次id  
    {  
        printf("\r\nevent 1 oc......\r\n");  
        printf("The id is :\r\n");  
        for(i=0;i<8;i++)  
        {  
            printf("%x",ID[i]);  
        }  
    }  
    else if(flag==500)//每500ms输出一次温度  
    {  
        printf("\r\nevent 2 oc......\r\n");  
        printf("The Temperature is:%f\r\n",Read_T());     
        flag = 0;  
    }  
}   
#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  

SPI从ADC中获取数值的代码作业

串口调试助手截图

/* Includes ------------------------------------------------------------------*/  
#include "stm32f10x.h"  
#include "stm32_eval.h"  
#include   
#include "spi_flash.h"  
#define VREF 3.3  
#define TxBufferSize1   (countof(TxBuffer1) - 1)  
#define RxBufferSize1   (countof(TxBuffer1) - 1)  
#define countof(a)      (sizeof(a) / sizeof(*(a)))  
#define  BufferSize (countof(Tx_Buffer)-1)  
typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;  
#define  FLASH_WriteAddress     0x00000  
#define  FLASH_ReadAddress      FLASH_WriteAddress  
#define  FLASH_SectorToErase    FLASH_WriteAddress  
#define  sFLASH_ID              0xEF3015     //W25X16  
//#define  sFLASH_ID              0xEF4015   //W25Q16  
#define buff_size  16;       
char rx_buff[],rx_buff_count=0;   
uint8_t Tx_Buffer[4096] ;  
uint8_t Rx_Buffer[BufferSize];  
__IO uint32_t DeviceID = 0;  
__IO uint32_t FlashID = 0;  
__IO TestStatus TransferStatus1 = FAILED;  
  
 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 Delay(__IO uint32_t nCount);  
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);  
  
/** @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;  
  
char *int_to_string(int number,char *strnum)//整形数据转换为字符型  
{  
int j=0,i=0,n=0;  
char temp;  
while(number>0)  
{  
*(strnum+j)=number%10+48;  
j++;  
number=number/10;  
n++;  
}  
  
      
for(i=0;iLibraries->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

关于焊电路板总结帖

焊接板只要做好以下几点其实是很容易的。

1.做好焊接部件的先后顺序，小的部件先焊，大的后面焊接。就是把握好焊接顺序就好了。

2.还有就是掌握好焊接的小技巧，利用一些小的技巧就可以了。

下面说说焊接要准备的一些工具如图：

接下来就是焊接了。经过焊接课程其实大多数的焊接技巧都掌握好了。这里我就不多说了。

说说大多数同学遇到的问题。也是难题那就是焊接芯片了。因为我们的芯片管脚很细，因此加大了焊接的难度。其实焊好后。

掌握方法也是不难的。下面我说说焊接的方法与技巧。

1.首先焊的核心板芯片，把管脚对齐，用透明胶布固定（检查管脚是否对其有个技巧，就是把板放到台灯下可以更好地观察到）；

2.在芯片管脚上再涂上焊宝(我推荐大家最好使用焊宝，因为焊宝币松香更好用一点)，这样就可以固定好芯片方便焊接了；

3.就是焊接了，焊这颗芯片千万不要加焊锡，并且要处理干净电烙铁，不然会不小心把芯片管脚焊短路了。焊接等烙铁达到温度后，

就慢慢加热芯片管脚就好了，这样芯片就焊好了！

涂焊宝

焊好芯片其他的贴片就很简单啦

可以先在焊盘上加一点焊锡，要有足够的焊锡才能把这些小贴片焊稳了

下面介绍一种针对芯片管脚被焊锡粘住后的解决方案

这是非常麻烦的一件事，很多同学不知道怎么处理，很难弄干净芯片的管脚。

用对方法其实就简单很多啦，方法就是使用焊宝或松香清洗就好了。

把被焊锡粘住的芯片放到焊宝或松香盒里。使用电烙铁加热。这样焊锡就好沉入焊宝盒的底部跟芯片管脚分开啦。

如图

下面是我的焊好的板的效果展示：

使用时候的线的连接

焊板的过程遇到挺多问题的，不过也学到了很多的东西，提高了自己的动手能力，对板也有了更多的了解。

总的来说焊电路板其实也是很有趣的