单片机8位数据翻转函数

ID:252527 · 发表于 2017-11-23 00:44

unsigned char swap(unsigned char data)
{
      unsigned char buffer;
      unsigned char a;
      buffer = 0;
      for(a=0;a<8;a++)
      {
            if(data&0x01)
            {
                     buffer = buffer | 0x01;
                     if(a<7)buffer = buffer << 1;
                     data = data >> 1;
            }
            else
            {
                     buffer = buffer & 0xfe;
                     if(a<7)buffer = buffer << 1;
                     data = data >> 1;
            }
      }
      return buffer;
}

例如数据
0101 0100 (0x54)

翻转
0010 1010 （0x2a）

ID:248503 · 发表于 2017-11-23 11:49

unsigned char swap(unsigned char data)
{
      unsigned char a, buffer=0;

      for(a=0;a<8;a++)
      {
            if(data&0x01)
            {
                     buffer = buffer | 0x01<<(7-a);

                     data = data >> 1;
            }
            else
            {

            }
      }
      return buffer;
}

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