求助,这个sbit附近哪错了 syntax error near sbit
#include “onewire.h”
sbit DQ=P1^4;
void Delay_OneWire(unsigned int t)
{
unsigned char i;
while(t–){
for(i=0;i<12;i++);
}
}
void Delay_us(void)
{
unsigned char i;
i = 30;
while (--i);
}
void Write_DS18B20(unsigned char dat)
{
unsigned char i;
for(i=0;i<8;i++)
{
DQ = 0;
DQ = dat&0x01;
Delay_OneWire(5);
DQ = 1;
dat >>= 1;
}
Delay_OneWire(5);
}
unsigned char Read_DS18B20(void)
{
unsigned char i;
unsigned char dat;
// unsigned char index = 0;
for(i=0;i<8;i++)
{
DQ = 0;
dat >>= 1;
DQ = 1;
Delay_us();
if(DQ)
{
dat |= 0x80;
}
Delay_OneWire(5);
}
return dat;
}
bit init_ds18b20(void)
{
bit initflag = 0;
DQ = 1;
Delay_OneWire(12);
DQ = 0;
Delay_OneWire(80); // ÑÓʱ´óÓÚ480us
DQ = 1;
Delay_OneWire(10); // 14
initflag = DQ; // initflagµÈÓÚ1³õʼ»¯Ê§°Ü
Delay_OneWire(5);
return initflag;
}
unsigned int rd_temperature(void)
{
unsigned char low,high;
init_ds18b20();
Write_DS18B20(0xcc);
Write_DS18B20(0x44);
init_ds18b20();
Write_DS18B20(0xCC);
Write_DS18B20(0xBE);
low = Read_DS18B20();
high = Read_DS18B20();
return (high<<8)+low;
}