unsigned long int DSPC01::pressure(void)
{
unsigned long int press_temp=0;
IIC_Start();
communicate_status = IIC_WriteByte(0x21);
if( communicate_status == COMMUNI_SUCCEED)
{
press_temp = IIC_ReadByte();
press_temp*=256;
press_temp*=256;
IIC_ACK();
press_temp+= (unsigned int)(IIC_ReadByte()<<8);
IIC_ACK();
press_temp+= IIC_ReadByte();
IIC_NoAck();
IIC_Stop();
}
return press_temp;
}
long int DSPC01::altitude(void)
{
long int alt_temp=0;
IIC_Start();
communicate_status = IIC_WriteByte(0x21);
if( communicate_status == COMMUNI_SUCCEED)
{
alt_temp = IIC_ReadByte();
alt_temp*=256;
alt_temp*=256;
IIC_ACK();
alt_temp+= (unsigned int)(IIC_ReadByte()<<8);
IIC_ACK();
alt_temp+= IIC_ReadByte();
IIC_NoAck();
IIC_Stop();
}
if (alt_temp>8388608) //negative!
alt_temp=8388608-alt_temp;
return alt_temp;
}
unsigned int DSPC01::compass(void)
{
unsigned int comp=0;
IIC_Start();
communicate_status = IIC_WriteByte(0x21);
if( communicate_status == COMMUNI_SUCCEED)
{
comp+= (unsigned long int)(IIC_ReadByte()<<8);
IIC_ACK();
comp+=IIC_ReadByte();
IIC_NoAck();
IIC_Stop();
}
return comp;
}
long int DSPC01::temperature(void)
{
long int temp=0;
IIC_Start();
communicate_status = IIC_WriteByte(0x21);
if( communicate_status == COMMUNI_SUCCEED)
{
temp +=(unsigned int)(IIC_ReadByte()<<8);
IIC_ACK();
temp +=IIC_ReadByte();
IIC_NoAck();
IIC_Stop();
}
if (temp>32768)
temp = 32768-temp;
return temp;
}
/*******************************************************************************
**函 数： IIC_ReadDataN
**功 能： IIC在指定地址连续读N个数据
**参 数： Addr --地址
** pData --接收数据指针
** len --接收数据长度
**返 回： void
*******************************************************************************/
void IIC_ReadDataN(u8 Addr,u8 *pData,u8 len)
{
u8 i,*pTemp= pData;
IIC_Start();
IIC_SendByte(DEVICE_ADDR);
IIC_WaitAck();
IIC_SendByte(Addr);
IIC_WaitAck();
IIC_Start();
IIC_SendByte(DEVICE_ADDR+1);
IIC_WaitAck();
for(i=0;i<len-1;i++)
{
*(pTemp++) = IIC_GetByte();
IIC_ACK();
}
*(pTemp++) = IIC_GetByte();
IIC_NACK();
IIC_Stop();
}
