改成基于STC8h芯片的来写

好的，以下是一个基于STC8h芯片的DS18B20温度传感器的示例代码：

#include <intrins.h>

// 定义 DS18B20引脚
#define DS1820_PIN P3_4

// 定义 OneWire 操作函数
void OneWire_Reset(void);
void OneWire_WriteByte char dat);
unsigned char OneWire_ReadByte(void);

void main() {
  unsigned char data[12];
  unsigned char addr[8];

  TMOD &= 0x0F;
  TMOD |= 0x10;
  TH1 = 0xFA;
  TL1 = 0xFA;
  PCON |= 0x80;
  SCON = 0x50;
  TR1 = 1;
  ES = 1;
  EA = 1;

  while (1) {
    if (!OneWire_Search(addr)) {
      OneWire_Reset();
      delay(1000);
      continue;
    }

    if (OneWire_CRC( addr, 7) != addr[7]) {
      UART_SendString("CRC is not valid!\r\n");
      continue;
    }

    OneWire_Reset();
    OneWire_WriteByte(0x55);
    for (unsigned char i = 0; i < 8; i++) {
      OneWire_WriteByte(addr[i]);
    }
    OneWire_WriteByte(0x44);

    delay(1000);

    OneWire_Reset();
    OneWire_WriteByte(0x55);
    for (unsigned char i = 0; i < 8; i++) {
      OneWire_WriteByte(addr[i]);
    }
    OneWire_WriteByte(0xBE);

    for (unsigned char i = 0; i < 9; i++) {
      data[i] = OneWire_ReadByte();
    }

    int16_t raw = (data[1] << 8) | data[0];
    float celsius = (float)raw / 16.0;
    UART_SendFloat(celsius);
    UART_SendString(" °C\r\n");
  }
}

void OneWire_Reset(void) {
  DS18B20_PIN = 0;
  _nop_();
  _nop_();
  _nop_();
  _nop_();
  DS18B20_PIN = 1;
  _nop_();
  _nop_();
  _nop_();
  _nop_();
}

void OneWire_WriteByte(unsigned char dat) {
  for (unsigned char i = 0; i < 8; i++) {
    DS18B20_PIN = 0;
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    DS18B20_PIN = dat & 0x01;
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    dat >>= 1;
    DS18B20_PIN = 1;
  }
}

unsigned char OneWire_ReadByte(void) {
  unsigned char dat = 0;
  for (unsigned char i = 0; i < 8; i++) {
    DS18B20_PIN = 0;
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    DS18B20_PIN = 1;
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    dat >>= 1;
    if (DS18B20_PIN) {
      dat |= 0x80;
    }
  }
  return dat;
}

unsigned char OneWire_Search(unsigned char *addr) {
  unsigned char i, j, flag;
  OneWire_Reset();
  OneWire_WriteByte(0xF0);
  for (i = 0; i < 8; i++) {
    addr[i] = 0;
  }
  for (i = 0; i < 64; i++) {
    flag = 0;
    for (j = 0; j < 8; j++) {
      if (OneWire_ReadByte() != ((i & (1 << j)) ? 0x80 : 0x00)) {
        flag = 1;
        break;
      }
    }
    if (flag) {
      continue;
    }
    for (j = 0; j < 8; j++) {
      addr[j] |= (OneWire_ReadByte() << i);
    }
    return 1;
  }
  return 0;
}

unsigned char OneWire_CRC(unsigned char *addr, unsigned char len) {
  unsigned char i, j, crc = 0;
  for (i = 0; i < len; i++) {
    unsigned char inbyte = addr[i];
    for (j = 0; j < 8; j++) {
      unsigned char mix = (crc ^ inbyte) & 0x01;
      crc >>= 1;
      if (mix) {
        crc ^= 0x8C;
      }
      inbyte >>= 1;
    }
  }
  return crc;
}

void UART_SendString(char *str) {
  while (*str) {
    SBUF = *str++;
    while (!TI);
    TI = 0;
  }
}

void UART_SendFloat(float num) {
  char buffer[10];
  sprintf(buffer, "%.2f", num);
  UART_SendString(buffer);
}

请注意，该代码中的 DS18B20_PIN 变量需要根据您实际使用的引脚进行修改。此外，代码中的 UART_SendString 和 UART_SendFloat 函数需要根据您实际使用的串口进行修改。