IIC
	
	
	
#include "stm32f10x.h"    
#include "stm32_eval.h"    
#include     
#define VREF 3.3    
unsigned char i=0;    
void EXTIkeyS1_Config(void);    
/** @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;    
EXTI_InitTypeDef   EXTI_InitStructure;    
NVIC_InitTypeDef   NVIC_InitStructure;    
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)    
    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 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 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 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;    
        I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;    
        I2C_InitStructure.I2C_OwnAddress1 = 0xA0;    
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;    
        I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;    
        I2C_InitStructure.I2C_ClockSpeed = 400000;           
        I2C_Cmd(I2C2, ENABLE);       
        I2C_Init(I2C2, &I2C_InitStructure);    
        I2C_AcknowledgeConfig(I2C2, ENABLE);        
}    
    
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 table[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 number(unsigned char i)    
{    
      char a=0,s=0;       
    a=i%10; s=i/10;      
    GPIO_SetBits(GPIOB,GPIO_Pin_1);       
    GPIO_ResetBits(GPIOB,table[a]);       
    delay_ms(1);       
    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,table[s]);         
    delay_ms(1);       
    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 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);    
}    
    
/**********************************************************************/    
/*IIC?????                                                                               */    
/*                                                                                                                                          */    
/**********************************************************************/    
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;    
}    
    
/* Private functions ---------------------------------------------------------*/    
    
/**  
  * @brief  Main program.  
  * @param  None  
  * @retval None  
  */    
int main(void)    
{     
    unsigned char count=0;    
  /*!< 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 */    
  RCC_Configuration();       
    USART_int(115200);          
	 GPIO_INIT(); 
  EXTIkeyS1_Config();       
    printf(" config done...\r\n");    
   Iic1_Init();
	delay_ms(1000);    
    while(1)    
    {    
         count=I2C2_ReadByte(0xA0,0);   
          
     number(count);  
if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_11))    
    {  delay_ms(100);  
      i=0;            
         I2C2_WriteByte(0xA0,i,i);    
                  
    }    
    }           
}  
void EXTI9_5_IRQHandler(void)    
{    
    if(EXTI_GetITStatus(EXTI_Line8) != RESET)    
  {  delay_ms(100);  
        i++;    
        I2C2_WriteByte(0xA0,0,i);   
 printf(" 按键次数  %d\r\n",i);        
    EXTI_ClearITPendingBit(EXTI_Line8);    
  }    
}    
        
#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
	
	

 
					
				 
			
			
			
						
			 
					
				 
 
 
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