bit x;
……
……
x = Read_Bit_P1(0); // Read Port 1, Pin 0
……
……
bit Read_Bit_P1(unsigned char Pin)
{
unsigned char p = 1;
p <<= Pin; // Left shift
// Write a 1 to the pin (to set up for reading)
Write_Bit_P1(Pin, 1);
return (P1 & p); // Read the pin
}
为什么return (P1 & p); 是返回bit类型的，而不是char类型的？ |
楼主
