EEPW论坛

#include "stm32_eval.h"  
#include <stdio.h>  
#define VREF 3.3  
EXTI_InitTypeDef   EXTI_InitStructure;    
GPIO_InitTypeDef   GPIO_InitStructure;    
NVIC_InitTypeDef   NVIC_InitStructure;    
USART_InitTypeDef USART_InitStructure;    
USART_ClockInitTypeDef USART_ClockInitStructure;  
unsigned char i=0;  
unsigned char count=0;    
  
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);    
}    
int Display[10]={ GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8,    
                    GPIO_Pin_9|GPIO_Pin_12,    
                    GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_5,    
                  GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_5,    
                    GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_8|GPIO_Pin_5,    
                    GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_8|GPIO_Pin_5,    
                  GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8|GPIO_Pin_5,    
                    GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12,       
                  GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14,    
                    GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14 };    
     
void Dis_number(unsigned char i)    
{    
    char one=0,ten=0;       
    one=i%10; ten=i/10;      
    GPIO_SetBits(GPIOB,GPIO_Pin_1);       
    GPIO_ResetBits(GPIOB,Display[one]);       
    delay_ms(10);       
    GPIO_ResetBits(GPIOB,GPIO_Pin_1);       
    GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);    
                   
    GPIO_SetBits(GPIOB,GPIO_Pin_15);       
    GPIO_ResetBits(GPIOB,Display[ten]);         
    delay_ms(10);       
    GPIO_ResetBits(GPIOB,GPIO_Pin_15);       
    GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);    
}    
  
  
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_9); //72HMz  
  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);//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);  
    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);    
  /* Configure four bit for preemption priority */    
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);    
  /* Enable the USART1 Interrupt */    
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;     
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;    
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;    
  NVIC_Init(&NVIC_InitStructure);    
}   
  
void GPIO_INIT()    
{    
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);    
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;    
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;    
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;    
  GPIO_Init(GPIOB, &GPIO_InitStructure);    
        
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);    
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11;    
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;    
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;    
  GPIO_Init(GPIOC, &GPIO_InitStructure);    
}    
    
  
void Iic1_Init(void)  
{  
        GPIO_InitTypeDef GPIO_InitStructure;  
        I2C_InitTypeDef I2C_InitStructure;  
          
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);  
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);  
        //PB6-I2C2_SCL PB7-I2C2_SDA PB10-I2C2_SCL PB11-I2C2_SDA  
        /* Configure IO connected to IIC*********************/  
        GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_10 | GPIO_Pin_11;  
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;  
        GPIO_Init(GPIOB, &GPIO_InitStructure);  
          
        I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;//配置I2C模式  
        I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;//该参数只有在I2C工作在快速模式下有意义  
        I2C_InitStructure.I2C_OwnAddress1 = 0xA0;//设置第一个设备自身地址  
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;//使能应答  
        I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;//地址为7位  
        I2C_InitStructure.I2C_ClockSpeed = 400000;//时钟速率 400KHZ     
        I2C_Cmd(I2C2, ENABLE);  
        I2C_Init(I2C2, &I2C_InitStructure);  
        I2C_AcknowledgeConfig(I2C2, ENABLE);      
}  
  
  
void I2C2_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte)  
{  
        while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));  
        I2C_GenerateSTART(I2C2,ENABLE);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));  
        I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));  
        I2C_SendData(I2C2, write_address);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));  
        I2C_SendData(I2C2, byte);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));  
        I2C_GenerateSTOP(I2C2, ENABLE);  
  
        do  
        {                  
                /* Send START condition */  
                I2C_GenerateSTART(I2C2, ENABLE);  
                /* Read I2C2 SR1 register */  
                /* Send EEPROM address for write */  
                I2C_Send7bitAddress(I2C2, 0xA0, I2C_Direction_Transmitter);  
        }while(!(I2C_ReadRegister(I2C2, I2C_Register_SR1) & 0x0002));  
  
        /* Clear AF flag */  
        I2C_ClearFlag(I2C2, I2C_FLAG_AF);  
        /* STOP condition */      
        I2C_GenerateSTOP(I2C2, ENABLE);    
}  
  
  
unsigned char I2C2_ReadByte(unsigned char  id, unsigned char read_address)  
{    
        unsigned char temp;           
        while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){}  
        I2C_GenerateSTART(I2C2, ENABLE);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));  
        I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));  
        I2C_Cmd(I2C2, ENABLE);  
        I2C_SendData(I2C2, read_address);    
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));  
        I2C_GenerateSTART(I2C2, ENABLE);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));  
        I2C_Send7bitAddress(I2C2, id, I2C_Direction_Receiver);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));  
        I2C_AcknowledgeConfig(I2C2, DISABLE);  
        I2C_GenerateSTOP(I2C2, ENABLE);  
        while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));  
        temp = I2C_ReceiveData(I2C2);  
        I2C_AcknowledgeConfig(I2C2, ENABLE);  
        return temp;  
}  
  
void EXTIkeyS1_Config(void)    
{    
  /* Enable GPIOA clock */    
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);    
      
  /* Configure PA.00 pin as input floating */    
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;    
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;    
  GPIO_Init(GPIOA, &GPIO_InitStructure);    
    
  /* Enable AFIO clock */    
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);    
    
  /* Connect EXTI0 Line to PA.00 pin */    
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8);    
    
  /* Configure EXTI0 line */    
  EXTI_InitStructure.EXTI_Line = EXTI_Line8;    
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;    
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;      
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;    
  EXTI_Init(&EXTI_InitStructure);    
    
  /* Enable and set EXTI0 Interrupt to the lowest priority */    
  NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;    
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;    
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;    
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;    
  NVIC_Init(&NVIC_InitStructure);    
}  
  
void EXTI9_5_IRQHandler(void)  //s1  
{     
    if(EXTI_GetITStatus(EXTI_Line8) != RESET)    
  {    
     i++;         
     I2C2_WriteByte(0xA0,0,i);      
     EXTI_ClearITPendingBit(EXTI_Line8);    
    }   
}  
  
int main(void)  
{  
  RCC_Configuration();  
  USART_int(115200);  
  GPIO_INIT();   
    Iic1_Init();  
    EXTIkeyS1_Config();   
    printf(" config done...\r\n");  
    delay_ms(1000);  
    while(1)    
    {    
     count=I2C2_ReadByte(0xA0,0);       
     Dis_number(count);    
    }    
}  
  
#ifdef  USE_FULL_ASSERT  
void assert_failed(uint8_t* file, uint32_t line)  
{   
  while (1)  
  {  
  }  
}  
  
#endif  
#ifdef __GNUC__  
  #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  
  

IIC

SPI

#include <stm32f10x.h>     
#include "stm32_eval.h"      
    
#include <stdio.h>      
#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_count=0;      
      
uint8_t Tx_Buffer[4096] ;  //发送缓冲    
uint8_t Rx_Buffer[BufferSize];  //接受缓冲    
__IO uint32_t DeviceID = 0;  //装置ID    
__IO uint32_t FlashID = 0; //闪存ID     
__IO TestStatus TransferStatus1 = FAILED;  //状态测试    
  
  
/**************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 Delay(__IO uint32_t nCount);      
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);             
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;i<n/2;i++)      
{      
temp=*(strnum+j+i-n);      
*(strnum+j+i-n)=*(strnum+j-i-1);      
*(strnum+j-i-1)=temp;      
}      
strnum[n]='\0';      
return strnum;      
}      
      
void RCC_Configuration(void)      
{      
  RCC_DeInit();          
  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);     
}      
      
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)      
{      
  while(BufferLength--)      
  {      
    if(*pBuffer1 != *pBuffer2)      
    {      
      return FAILED;      
    }      
      
    pBuffer1++;      
    pBuffer2++;      
  }      
  return PASSED;      
}      
      
void Delay(__IO uint32_t nCount)      
{      
  for(; nCount != 0; nCount--);      
}      
      
void ADC_CONFIG(){      
    ADC_InitTypeDef ADC_InitStructure;      
    #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)      
  /* ADCCLK = PCLK2/2 */      
  RCC_ADCCLKConfig(RCC_PCLK2_Div2);       
#else      
  /* ADCCLK = PCLK2/4 */      
  RCC_ADCCLKConfig(RCC_PCLK2_Div4);       
#endif      
ADC_DeInit(ADC1);      
  /* Enable ADC1 and GPIOC clock */      
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB, ENABLE);      
          
    /* Configure PB0 (ADC Channel14) as analog input -------------------------*/      
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;      
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;      
  GPIO_Init(GPIOB, &GPIO_InitStructure);      
          
        
  /* ADC1 configuration ------------------------------------------------------*/      
  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 = 1;      
  ADC_Init(ADC1, &ADC_InitStructure);      
      
      
  /* Enable ADC1 DMA */      
  ADC_DMACmd(ADC1, ENABLE);      
        
  /* Enable ADC1 */      
  ADC_Cmd(ADC1, ENABLE);      
      
}      
      
int Get_ADC(){      
     /* ADC1 regular channel configuration */       
  ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_55Cycles5);      
    /* Enable ADC1 reset calibration register */         
  ADC_ResetCalibration(ADC1);      
  /* Check the end of ADC1 reset calibration register */      
  while(ADC_GetResetCalibrationStatus(ADC1));      
      
  /* Start ADC1 calibration */      
  ADC_StartCalibration(ADC1);      
  /* Check the end of ADC1 calibration */      
  while(ADC_GetCalibrationStatus(ADC1));      
           
  /* Start ADC1 Software Conversion */       
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);      
          
    return ADC_GetConversionValue(ADC1);      
}      
      
      
void SPI_TEST()    
{     
    int i=0;          
    int ADValue = 0;      
    float Volt=0.00;    
    char shuzu[100];    
    for(i=0;i<5;i++){  
      ADValue = Get_ADC();    
      Volt = VREF*ADValue/4095;    
      printf("===============================\r\n");    
      printf("The ADC value is:%d\r\n",ADValue);    
      printf("The Volt is:%f V\r\n",Volt);    
      delay_ms(500);                         
}      
        
    printf("\r\n这是一个2M SPI总线flash(W25X16)测试 \r\n");    
    SPI_FLASH_Init();    
    /* Get SPI Flash Device ID */    
    DeviceID = SPI_FLASH_ReadDeviceID();    
    Delay( 200 );    
    /* Get SPI Flash ID */    
    FlashID = SPI_FLASH_ReadID();    
    printf("\r\n FlashID is 0x%X,  Manufacturer Device ID is 0x%X\r\n", FlashID, DeviceID);    
    /* Check the SPI Flash ID */    
    if (FlashID == sFLASH_ID)  /* #define  sFLASH_ID  0xEF3015 */    
    {    
        printf("\r\n 检测到华邦flash W25X16 !\r\n");    
        /* Erase SPI FLASH Sector to write on */    
        SPI_FLASH_SectorErase(FLASH_SectorToErase);          
            
        /*写缓存并发送*/    
        SPI_FLASH_BufferWrite(Tx_Buffer, FLASH_WriteAddress, BufferSize);    
        printf("\r\n写入的数据是:%s \r\t", Tx_Buffer);    
            
        /* 读出刚才写入的数据*/    
        SPI_FLASH_BufferRead(Rx_Buffer, FLASH_ReadAddress, BufferSize);    
        printf("\r\n读出的数据是:%s \r\n", Rx_Buffer);    
          
        TransferStatus1 = Buffercmp(Tx_Buffer, Rx_Buffer, BufferSize);    
            
        if( PASSED == TransferStatus1 )    
        {        
            printf("\r\n 2M SPI总线flash(W25X16)测试成功!\n\r");    
        }    
        else    
        {            
            printf("\r\n 2M SPI总线flash(W25X16)测试失败!\n\r");    
        }    
    }// if (FlashID == sFLASH_ID)    
    else    
    {        
        printf("\r\n 未检测到 W25X16 ID!\n\r");    
    }    
        
    SPI_Flash_PowerDown();      
    printf("\r\n=================================================\n\r");    
}      
  
int main(void)      
{              
  RCC_Configuration();      
  USART_int(115200);       
  ADC_CONFIG();      
  printf(" config done...\r\n");     
  Get_ADC();    
  delay_ms(1000);      
  while(1){  
    SPI_TEST();      
    delay_ms(1000);      
}      
}      
         
#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

时钟滴答

#include "stm32f10x.h"  
#include "stm32_eval.h"  
#include <stdio.h>  
volatile int flag;  
                                                      //板子已将PC12脚接到18B20  
#define Set_B20()    GPIO_SetBits(GPIOC, GPIO_Pin_12)    //关上PC12  
#define Reset_B20()  GPIO_ResetBits(GPIOC, GPIO_Pin_12)   //打开PC12  
#define Read_B20()   GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12)   //读PC12  
unsigned char Error_Flag=0;  
unsigned char zf=0;    
  
/*延时函数 微秒*/    
void delay_us(u32 n)     
{     
    u8 j;     
    while(n--)     
    for(j=0;j<10;j++);     
}     
/*延时函数 毫秒*/    
void  delay_ms(u32 n)     
{     
   while(n--)     
    delay_us(1000);     
}  
  
void SysTick_Configuration(void)  
{  
    /*==========此次作业的部分===========*/  
  if (SysTick_Config(48000))                //SysTick配置。48000/48ms=1ms  
    /*===================================*/  
  {   
    while (1);  
  }    
  NVIC_SetPriority(SysTick_IRQn, 0x0);                       //SysTick中断优先级  
}  
  
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);  
    /*==========此次作业的部分===========*/  
  RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_6);     //  PLLMul_X就是X的倍数，即8*6=48HMz  
    /*===================================*/  
  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);  
  
        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)  //18B20时序要求严格精确，为18B20写的延时函数  
{  
    u16 i;                               //这个函数写的貌似是1us  
    while(nus--)             //nus每减一次，i减12次  
        for(i=12;i>0;i--);  
}  
  
void Init18B20(void)  
{  
   u8 aa=0;  
   u8 count =0;  
     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);  //打开PC时钟  
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;         //选中管脚12  
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;   //开漏输出  
   GPIO_Init(GPIOC, &GPIO_InitStructure);  
   Set_B20() ;         //拉高  
   delay_18b20(1);  
      
     //一、复位：至少480us的低电平信号，当18b20接收到此信号后会回发芯片一个存在脉冲  
   Reset_B20();        //拉低  
   delay_18b20(480);  
      
     //二、存在脉冲：将数据单总线拉高，接收存在脉冲，通信双方达成基本协议，双方开始数据通信  
   Set_B20();     //拉高  
   delay_18b20(480);  
  
    count=0;  
    aa=Read_B20();   //aa为读得的温度、  
      
/*=====我觉得下面这几句用来统计18B20出现错误的次数，次数到99次的时候报错======*/  
    while(!aa && count<100)   //如果温度值和count数都大于100时  
   {  
    aa=Read_B20();           //再次读温度值  
      count++;                 //发生错误了，数值+1  
   }  
       
   if(count>=99)             //如果发生错误的次数大于99次，那么报错，标志位为1  
        Error_Flag=1;  
     else  
          Error_Flag=0;          //报错次数未达到99次，正常工作    
}  
                             //读一个字节  
unsigned char Read18B20(void)//读18b20里的数据，由于是单数据总线，需要一位一位地读  
{    
unsigned char i=0;  
unsigned char date=0;  
u8 tempp;  
   for(i=8;i>0;i--)//循环8次  
   {  
  
   Reset_B20();   //拉低读数  
   date>>=1;      //右移一位  
   delay_18b20(1);  
   Set_B20();      //拉高  
   delay_18b20(1);  
   tempp=Read_B20();  // tempp为读得的温度  
   if(tempp)  
        date|=0x80;      
        delay_18b20(60);  
    }  
    return(date);  
}  
  
void Write18B20(unsigned char date)   //写一个字节  
{  
    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()//  
{     
    unsigned char TUp,TDown;  
    unsigned char fTemp;  
    u8 TT=0;  
    float Temp = 0;  
    Init18B20();  
    Write18B20(0xcc);    // 跳过读取序列号  
    Write18B20(0x44);   //  
    Init18B20();  
    Write18B20(0xcc);   //  
    Write18B20(0xbe);   //    
    TDown = Read18B20();    //低8位  
    TUp = Read18B20();      //高8位     
    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)  
{  
    int i;  
    unsigned char ID1[8];     //定义一个用于18b20id读取和存放的数组  
  RCC_Configuration();  
  USART_int(115200);  
    SysTick_Configuration();  
      
/*==========此次作业的部分===========*/  
  Init18B20 ();        //初始化DS18B20  
    Write18B20(0x33);     //写入“读取序列号”命令   
  delay_18b20 (15);   
      for(i=0;i<8;i++)  
  {  
        ID1[i]=Read18B20();   //读取18b20发回的64位地址  
  }  
/*===================================*/  
      
    printf(" config done...\r\n");  
    delay_ms(1000);  
      
    while(1)  
    {  
    /*==========此次作业的部分===========*/  
        if(flag == 300){         //300us读一次id  
              printf("The id is:");  
                for(i=0;i<8;i++)          
          {       
                printf("%u",ID1[i]);      
                    if(i==7){printf("\r\n");    }  
        }   
      }  
    /*===================================*/  
              
        if(flag == 500){         //500us读一次温度  
            printf("The Temperature is:%f\r\n",Read_T());  
      }  
    }  
}  
  
#ifdef  USE_FULL_ASSERT  
  
void assert_failed(uint8_t* file, uint32_t line)  
{   
  while (1)  
  {  
  }  
}  
  
#endif  
  
#ifdef __GNUC__  
  
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)  
#else  
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)  
#endif /* __GNUC__ */  
  
PUTCHAR_PROTOTYPE  
{  
  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

#include "stm32f10x.h"  
#include "misc.h"  
  
void RCC_Configuration(void);  
void NVIC_Configuration(void);  
void GPIO_Configuration(void);  
void TIM2_Configuration(void);  
void TIM3_Configuration(void);  
void TIM7_Configuration(void);  
  
int main(void)  
{  
 RCC_Configuration();  
 NVIC_Configuration();  
 GPIO_Configuration();  
 TIM2_Configuration();  
 TIM3_Configuration();  
 TIM7_Configuration();  
 while (1) {  
  ;  
 }  
}  
  
void TIM2_Configuration(void)  
{  
    /*每0.5s发生一次更新事件(进入中断服务程序) */  
 TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;  
 TIM_TimeBaseStructure.TIM_Period = 17999;   
 TIM_TimeBaseStructure.TIM_Prescaler = 1999;  
 TIM_TimeBaseStructure.TIM_ClockDivision = 0;  
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
 TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);  
 TIM_ClearFlag(TIM2, TIM_FLAG_Update);  
 TIM_ARRPreloadConfig(TIM2, DISABLE);  
 TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);      
 TIM_Cmd(TIM2, ENABLE);  
}  
void TIM3_Configuration(void)  
{  
    /*每1s发生一次更新事件(进入中断服务程序)*/  
 TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;  
 TIM_TimeBaseStructure.TIM_Period = 35999;   
 TIM_TimeBaseStructure.TIM_Prescaler = 1999;  
 TIM_TimeBaseStructure.TIM_ClockDivision = 0;  
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//计数方式  
 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);//初始化  
 TIM_ClearFlag(TIM3, TIM_FLAG_Update);//清除更新标志位    
 TIM_ARRPreloadConfig(TIM3, DISABLE);//预装载寄存器的内容被立即上传到影子寄存器上  
 TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);//使能中断源     
 TIM_Cmd(TIM3, ENABLE);//使能  
}  
void  TIM7_Configuration(void)  
{  
    /*每1.5s发生一次更新事件(进入中断服务程序)*/  
 TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;  
 TIM_TimeBaseStructure.TIM_Period = 53999;   
 TIM_TimeBaseStructure.TIM_Prescaler = 1999;  
 TIM_TimeBaseStructure.TIM_ClockDivision = 0;  
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
 TIM_TimeBaseInit(TIM7, &TIM_TimeBaseStructure);  
 TIM_ClearFlag(TIM7, TIM_FLAG_Update);  
 TIM_ARRPreloadConfig(TIM7, DISABLE);  
 TIM_ITConfig(TIM7, TIM_IT_Update, ENABLE);      
 TIM_Cmd(TIM7, ENABLE);  
}  
  
void RCC_Configuration(void)  
{  
  GPIO_InitTypeDef   GPIO_InitStructure;  
  SystemInit();  
   
 /* TIM3 clock enable */  
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2|RCC_APB1Periph_TIM3|RCC_APB1Periph_TIM7, ENABLE);  
   
 /* GPIOC clock enable */  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);  
   
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);//使能PD时钟，使能IO时钟  
  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);//蜂鸣器  
  
}  
  
void NVIC_Configuration(void)  
{  
 NVIC_InitTypeDef NVIC_InitStructure;  
 /* Enable the TIM2 gloabal Interrupt*/  
 NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;  
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;    
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  
 NVIC_Init(&NVIC_InitStructure);  
      
    /* Enable the TIM3 gloabal Interrupt*/  
 NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;    
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  
 NVIC_Init(&NVIC_InitStructure);  
      
    /* Enable the TIM7 gloabal Interrupt*/  
 NVIC_InitStructure.NVIC_IRQChannel = TIM7_IRQn;  
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;    
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  
 NVIC_Init(&NVIC_InitStructure);      
}  
  
void GPIO_Configuration(void)  
{  
 GPIO_InitTypeDef GPIO_InitStructure;  
  
 GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_7;  
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  
 GPIO_Init(GPIOC, &GPIO_InitStructure);  
}  
#include "stm32f10x_it.h"  
  
void TIM2_IRQHandler(void)  
{  
 if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) {  
  /* Clear TIM2 update interrupt */  
  TIM_ClearITPendingBit(TIM2, TIM_IT_Update);  
  GPIO_WriteBit(GPIOC, GPIO_Pin_0|GPIO_Pin_1, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_0|GPIO_Pin_1)));  
 }  
}  
 void TIM3_IRQHandler(void)  
{  
 if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) {  
  /* Clear TIM3 update interrupt */  
  TIM_ClearITPendingBit(TIM3, TIM_IT_Update);  
  GPIO_WriteBit(GPIOC, GPIO_Pin_2|GPIO_Pin_3, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_2|GPIO_Pin_3)));  
 }  
}  
  
void TIM7_IRQHandler(void)  
{  
 if (TIM_GetITStatus(TIM7, TIM_IT_Update) != RESET) {  
  /* Clear TIM7 update interrupt */  
  TIM_ClearITPendingBit(TIM7, TIM_IT_Update);  
  GPIO_WriteBit(GPIOC,GPIO_Pin_4|GPIO_Pin_7, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_4|GPIO_Pin_7)));  
 }  
}  

定时器 tim3定时闪烁led

come on

让我看到你们的热情