#define SDA      PDR1.BITS.B0
#define SCL      PDR1.BITS.B1

void SendSerially(char Value)
{
    char BitCount;

    // Start with the clock low
    SCL = 0;

    for (BitCount = 0  ;  BitCount < 8  ;  BitCount++)
    {
        // Place the least significant bit on the SDA pin
        SDA = (Value & 0x01);

        // Toggle the clock line high then low
        SCL = 1;
        SCL = 0;

        // Shift the value down so the next bit to send is in the bit 0 position.
        Value >>= 1;
    }
}