还是坑爹的I2C问题

只看该作者 · 2015-8-14 15:50

STM8S003F3P6芯片
硬件I2C
产生问题：程序经常死机，偶尔正常，都是卡在I2C_CheckEvent函数里面，写了独立看门狗也没作用
搞的心塞，求大神打救
贴出程序：
#define I2C_Speed             100000
#define I2C1_SLAVE_ADDRESS7 0xA0
GPIO_Init(GPIOB, GPIO_PIN_4, GPIO_MODE_OUT_OD_HIZ_FAST);//PB4 I2C_SCL 功能引脚，总线的时钟脚，设为高速开漏高阻输出。
GPIO_Init(GPIOB, GPIO_PIN_5, GPIO_MODE_OUT_OD_HIZ_FAST);//PB5 I2C_SDA 功能引脚，总线的数据脚，设为高速开漏高阻输出
/*********************************************
I2C总线写一个字节
**********************************************/
void I2C_Write(unsigned char ADDR,unsigned char Wdata)
{
   ITStatus it_status;
FlagStatus flag_status;

I2C_GenerateSTART(ENABLE);

//I2C启动  /* Send STRAT condition */
/* Test on EV5 and clear it */
//while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT));
while(!I2C_CheckEvent(I2C_EVENT_MASTER_MODE_SELECT ));

   I2C_Send7bitAddress(ADDR, I2C_DIRECTION_TX); //写I2C从器件地址和写方式
/* Test on EV6 and clear it */
//while(!I2C_CheckEvent(I2C_EVENT_MASTER_ADDRESS_ACKED));
while(!I2C_CheckEvent(I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

   I2C_SendData(Wdata);      //写数据到器件相应寄存器
/* Test on EV8 and clear it */
while (!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTING));

   /* Send STOP condition */
I2C_GenerateSTOP(ENABLE);
}

/*********************************************
I2C总线读一个字节
返回：16位数值
**********************************************/
unsigned int I2C_Read(unsigned char ADDR)
{
unsigned int temp;
unsigned char tmp1,tmp2;
   /* While the bus is busy */
while(I2C_GetFlagStatus(I2C_FLAG_BUSBUSY));

I2C_GenerateSTART(ENABLE);

//I2C启动 /* Generate start & wait event detection */
   /* Test on EV5 and clear it */
//while (!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT));
while (!I2C_CheckEvent(I2C_EVENT_MASTER_MODE_SELECT));

I2C_Send7bitAddress(ADDR, I2C_DIRECTION_RX); //写I2C从器件地址和写方式
/* Test on EV6 and clear it */
//while (!I2C_CheckEvent(I2C_EVENT_MASTER_ADDRESS_ACKED));
while (!I2C_CheckEvent(I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
//I2C_ClearFlag(I2C_FLAG_ADDRESSSENTMATCHED);
/* 2 variables are used to avoid any compiler optimization */
   /* Read the SR1 register */
   tmp1 = I2C->SR1;
   /* Read the SR3 register */
   tmp2 = I2C->SR3;

while (!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_RECEIVED));
   temp = I2C_ReceiveData();//启动主I2C读方式
                     //读取I2C接收数据第一字节
/* Disable Acknowledgement */
I2C_AcknowledgeConfig(I2C_ACK_NONE);


while (!I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_RECEIVED));
   temp = (temp<<8)+I2C_ReceiveData();       //读第二字节合成16位数值
I2C_GenerateSTOP(ENABLE);                   //I2C停止
I2C_AcknowledgeConfig(I2C_ACK_CURR);    //启动主

I2C读方式,结果应答NO_ACK

   return temp;
}

1万 · 2015-8-14 16:26

坑爹的代码。我都难以理解了。

3万 · 2015-8-14 16:27

gaoyang9992006 发表于 2015-8-14 16:26
坑爹的代码。我都难以理解了。

:lol

只看该作者 · 2015-8-14 23:50

复制

#define I2C_Speed              100000

#define I2C1_SLAVE_ADDRESS7    0xA0

void Init( void )

{

  //PB4 I2C_SCL 功能引脚，总线的时钟脚，设为高速开漏高阻输出。

  GPIO_Init( GPIOB, GPIO_PIN_4, GPIO_MODE_OUT_OD_HIZ_FAST );

  //PB5 I2C_SDA 功能引脚，总线的数据脚，设为高速开漏高阻输出

  GPIO_Init( GPIOB, GPIO_PIN_5, GPIO_MODE_OUT_OD_HIZ_FAST );

}



/*********************************************

 I2C总线写一个字节

 **********************************************/

void I2C_Write( unsigned char ADDR, unsigned char Wdata )

{

  ITStatus it_status;

  FlagStatus flag_status;

  

  I2C_GenerateSTART( ENABLE );

  

  //I2C启动  

  /* Send STRAT condition */

  /* Test on EV5 and clear it */

  //while(!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT));

  while ( !I2C_CheckEvent( I2C_EVENT_MASTER_MODE_SELECT ) )

    ;

  

  I2C_Send7bitAddress( ADDR, I2C_DIRECTION_TX );   //写I2C从器件地址和写方式

  /* Test on EV6 and clear it */

  //while(!I2C_CheckEvent(I2C_EVENT_MASTER_ADDRESS_ACKED)); 

  while ( !I2C_CheckEvent( I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) )

    ;

  

  I2C_SendData( Wdata );                           //写数据到器件相应寄存器

  /* Test on EV8 and clear it */

  while ( !I2C_CheckEvent( I2C_EVENT_MASTER_BYTE_TRANSMITTING ) )

    ;

  

  /* Send STOP condition */

  I2C_GenerateSTOP( ENABLE );

}



/*********************************************

 I2C总线读一个字节

 返回：16位数值

 **********************************************/

unsigned int I2C_Read( unsigned char ADDR )

{

  unsigned int temp;

  unsigned char tmp1, tmp2;

  /* While the bus is busy */

  while ( I2C_GetFlagStatus( I2C_FLAG_BUSBUSY ) )

    ;

  

  I2C_GenerateSTART( ENABLE );

  

  //I2C启动        

  /* Generate start & wait event detection */

  /* Test on EV5 and clear it */

  //while (!I2C_CheckEvent(I2C_EVENT_MASTER_START_SENT));

  while ( !I2C_CheckEvent( I2C_EVENT_MASTER_MODE_SELECT ) )

    ;

  

  I2C_Send7bitAddress( ADDR, I2C_DIRECTION_RX );   //写I2C从器件地址和写方式

  /* Test on EV6 and clear it */

  //while (!I2C_CheckEvent(I2C_EVENT_MASTER_ADDRESS_ACKED));

  while ( !I2C_CheckEvent( I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ) )

    ;

  //I2C_ClearFlag(I2C_FLAG_ADDRESSSENTMATCHED);

  /* 2 variables are used to avoid any compiler optimization */

  /* Read the SR1 register */

  tmp1 = I2C->SR1;

  /* Read the SR3 register */

  tmp2 = I2C->SR3;

  

  while ( !I2C_CheckEvent( I2C_EVENT_MASTER_BYTE_RECEIVED ) )

    ;

  //启动主I2C读方式

  temp = I2C_ReceiveData( );   

  

  //读取I2C接收数据 第一字节 

  /* Disable Acknowledgement */

  I2C_AcknowledgeConfig( I2C_ACK_NONE );

  

  while ( !I2C_CheckEvent( I2C_EVENT_MASTER_BYTE_RECEIVED ) )

    ;

  temp = ( temp << 8 ) + I2C_ReceiveData( );      //读第二字节 合成16位数值

  I2C_GenerateSTOP( ENABLE );                     //I2C停止

  I2C_AcknowledgeConfig( I2C_ACK_CURR );          //启动主I2C读方式,结果应答NO_ACK

    

  return temp;

}

只看该作者 · 2015-8-15 17:52

在我印象中0系列的没有出过问题，工业环境。

只看该作者 · 2015-8-16 23:13

STARM 发表于 2015-8-14 23:50

这个是你试过没问题的吗？

只看该作者 · 2015-8-17 09:49

用while ( !I2C_CheckEvent( I2C_EVENT_MASTER_BYTE_RECEIVED ) )这种死循环等,效率不会比IO口模拟的I2C好,为啥不用IO口模拟的I2C呢?

只看该作者 · 2015-8-18 16:21

你死在哪里了啊，看我帖子有个调试好的只是我的用的stm8l052r8 反正差不多

只看该作者 · 2015-8-18 16:22

估计清标志位没清干净

只看该作者 · 2015-8-18 16:29

你发送完地址准备接收的时候忘了发停止位了吧 I2C_GenerateSTOP(I2C1,ENABLE);

只看该作者 · 2015-8-18 16:32

state_tmp102 tmp102_read(unsigned int *byte)
{
unsigned int x = 0x0fff;
unsigned int byte1 = 0,byte2 = 0;
if(tmp102_tmpConversion() == ERROR_TMP102)
{
      return ERROR_TMP102;
}
x = 0x0fff;
while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY))                            //总线忙
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}
I2C_GenerateSTART(I2C1,ENABLE);                                           //起始位
x = 0x0fff;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT))
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}
I2C_Send7bitAddress(I2C1,0x90,I2C_Direction_Transmitter);                //从地址
x = 0x0fff;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}
I2C_SendData(I2C1,0x00);                                                 // 指针地址
x = 0x0fff;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED))
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}
I2C_GenerateSTOP(I2C1,ENABLE);                                           //停止位
x = 0x0fff;
while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY))
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}
I2C_GenerateSTART(I2C1,ENABLE);                                           //起始位
x = 0x0fff;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT))
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}
I2C_Send7bitAddress(I2C1,0x91,I2C_Direction_Receiver);                   //从地址
x = 0x0fff;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}

x = 0x0fff;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED))             //接收到数据高位
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}
byte1 = (unsigned char)I2C_ReceiveData(I2C1);
x = 0x0fff;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED))             //接收到数据低位
{
      x -- ;
      if(x <= 1)
         return ERROR_TMP102;
}
byte2 = (unsigned char)I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1,DISABLE);
I2C_GenerateSTOP(I2C1,ENABLE);
*byte = (byte1 << 8) | byte2;
*byte = *byte >>4;                                                       //高12位为温度
return SUCCESS_TMP102;