#define DS_OUT    GpioMuxRegs.GPADIR.bit.GPIOA0=1 // 輸出
#define DS_IN     GpioMuxRegs.GPADIR.bit.GPIOA0=0 //輸 入
#define DS_HI     GpioDataRegs.GPADAT.bit.GPIOA0=1
#define DS_LOW    GpioDataRegs.GPADAT.bit.GPIOA0=0
#define DS_DATA   GpioDataRegs.GPADAT.bit.GPIOA0
#define DS_IO    GpioMuxRegs.GPAMUX.all=GpioMuxRegs.GPAMUX.all&0xfffe//端口A.0(為0)設置為I/O
#define DS_QUAL   GpioMuxRegs.GPAQUAL.all=GpioMuxRegs.GPAQUAL.all&0xfffe
//float temperature;
//#define nop()     { asm("nop");}
void write_byte(unsigned char command);
float read_temp();
float transform(int t);
unsigned char read_byte(void);
unsigned char reset_ds1820(void);