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标题: 测试代码2 [打印本页]

作者: 海洋狂吻 时间: 2013-12-21 11:06 标题: 测试代码2

#include "L3G4200D.h"
#include  <math.h> //Keil library

/*******************************************************************************
* Function Name  : I2C_Configuration
* Description :
* Input       : None
* Output       : None
* Return       : None
* Attention
: None
*******************************************************************************/

void I2C_Configuration(void)
{
I2C_InitTypeDef  I2C_InitStructure;
GPIO_InitTypeDef  GPIO_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO , ENABLE);

/* Configure I2C1 pins: PB10->SCL and PB11->SDA */
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_DeInit(I2C2);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = L3G4200_Addr;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 100000;

I2C_Cmd(I2C2, ENABLE);
I2C_Init(I2C2, &I2C_InitStructure);

I2C_AcknowledgeConfig(I2C2, ENABLE);
}

/*******************************************************************************
* Function Name  : I2C_delay
* Description :
* Input       : None
* Output       : None
* Return       : None
* Attention
: None
*******************************************************************************/
static void I2C_delay(uint16_t cnt)
{

while(cnt--);
}

/*******************************************************************************
* Function Name  : I2C_AcknowledgePolling
* Description :
* Input       : I2C_TypeDef * , uint8_t
* Output       : None
* Return       : None
* Attention
: None
*******************************************************************************/
static void I2C_AcknowledgePolling(I2C_TypeDef *I2Cx,uint8_t I2C_Addr)
{
  vu16 SR1_Tmp;
  do
  {
I2C_GenerateSTART(I2Cx, ENABLE);

SR1_Tmp = I2C_ReadRegister(I2Cx, I2C_Register_SR1);

//#ifdef AT24C01A

I2C_Send7bitAddress(I2Cx, I2C_Addr, I2C_Direction_Transmitter);
/*
#else

I2C_Send7bitAddress(I2Cx, 0, I2C_Direction_Transmitter);
#endif
*/
  }while(!(I2C_ReadRegister(I2Cx, I2C_Register_SR1) & 0x0002));

  I2C_ClearFlag(I2Cx, I2C_FLAG_AF);

  I2C_GenerateSTOP(I2Cx, ENABLE);
}

/*******************************************************************************
* Function Name  : I2C_Read
* Description :
* Input       :
* Output       :
* Return       :
* Attention
: None
*******************************************************************************/
uint8_t I2C_Read(I2C_TypeDef *I2Cx,uint8_t I2C_Addr,uint8_t addr,uint8_t *buf,uint16_t num)
{
if(num==0)

return 1;

while(I2C_GetFlagStatus(I2Cx, I2C_FLAG_BUSY));

I2C_AcknowledgeConfig(I2Cx, ENABLE);

I2C_GenerateSTART(I2Cx, ENABLE);
while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT));

//#ifdef AT24C01A

I2C_Send7bitAddress(I2Cx,  I2C_Addr, I2C_Direction_Transmitter);
while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

I2C_SendData(I2Cx, addr);
while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

I2C_GenerateSTART(I2Cx, ENABLE);

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT));

I2C_Send7bitAddress(I2Cx, I2C_Addr, I2C_Direction_Receiver);

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
/*

#else

I2C_Send7bitAddress(I2Cx, addr<<1, I2C_Direction_Receiver);

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
#endif
*/

while (num)
{

if(num==1)

{

I2C_AcknowledgeConfig(I2Cx, DISABLE);

I2C_GenerateSTOP(I2Cx, ENABLE);

}

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED));  /* EV7 */

*buf = I2C_ReceiveData(I2Cx);

buf++;

/* Decrement the read bytes counter */

num--;
}

I2C_AcknowledgeConfig(I2Cx, ENABLE);

return 0;
}

/*******************************************************************************
* Function Name  : I2C_WriteOneByte
* Description :
* Input       :
* Output       : None
* Return       :
* Attention
: None
*******************************************************************************/
uint8_t I2C_WriteOneByte(I2C_TypeDef *I2Cx,uint8_t I2C_Addr,uint8_t addr,uint8_t value)
{

I2C_GenerateSTART(I2Cx, ENABLE);

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT));

//#ifdef AT24C01A

I2C_Send7bitAddress(I2Cx, I2C_Addr, I2C_Direction_Transmitter);

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));


I2C_SendData(I2Cx, addr);

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/*
#else

I2C_Send7bitAddress(I2Cx, addr<<1, I2C_Direction_Transmitter);

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
#endif
*/

I2C_SendData(I2Cx, value);

while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED));


I2C_GenerateSTOP(I2Cx, ENABLE);


I2C_AcknowledgePolling(I2Cx,I2C_Addr);

I2C_delay(1000);

return 0;
}

/*******************************************************************************
* Function Name  : I2C_Write
* Description :
* Input       :
* Output       : None
* Return       :
* Attention
: None
*******************************************************************************/
uint8_t I2C_Write(I2C_TypeDef *I2Cx,uint8_t I2C_Addr,uint8_t addr,uint8_t *buf,uint16_t num)
{

uint8_t err=0;

while(num--)

{

if(I2C_WriteOneByte(I2Cx, I2C_Addr,addr++,*buf++))

{

err++;

}

}

if(err)

return 1;

else

return 0;

}
//************初始化L3G4200D*********************************
void Init_L3G4200D(void)
{
I2C_WriteOneByte(I2C2,L3G4200_Addr,CTRL_REG1, 0x0f);
I2C_WriteOneByte(I2C2,L3G4200_Addr,CTRL_REG2, 0x00);
I2C_WriteOneByte(I2C2,L3G4200_Addr,CTRL_REG3, 0x08);
I2C_WriteOneByte(I2C2,L3G4200_Addr,CTRL_REG4, 0x00);
I2C_WriteOneByte(I2C2,L3G4200_Addr,CTRL_REG5, 0x00);
}

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