基于单片机的时钟日历设计(5)

for (i=0;i<8;i++) { DS18_delay(6); }

return(value); } unsigned

// 读取字节，每次读取一个字节

if(read_bit()) value|=0x01<

int ReadTemperature(void) { unsigned char get[10];

unsigned char temp_lsb,temp_msb; unsigned int t; unsigned char k; ow_reset();

ds18write_byte(0xCC); ds18write_byte(0x44); DS18_delay(5); ow_reset();

ds18write_byte(0xCC); ds18write_byte(0xBE);

// 跳过 ROM // 读暂存器

// 跳过 ROM // 启动温度转换

for (k=0;k<2;k++){get[k]=DSread_byte();} temp_msb = get[1]; // Sign byte + lsbit temp_lsb = get[0]; // Temp data plus lsb t=temp_msb*256+temp_lsb; t=t&0x0ff0; if(t<0xff&&t>0xf0) t=(-1)*t; return t>>4;

//temp_f = (((int)temp_c)* 9)/5 + 32; }

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