Output a byte on a pin as serial data. Good for debugging, especially if your scope as serial decode.

AvrSerialPin

// Print as a serial bit stream on PB2 - Each bit is 17us, just about 38400 baud - LSB first - for debugging. 

void sprint( uint8_t x ) {
    
    DDRB |= _BV(2);    
    PORTB |= _BV(2);    // Idle on serial port
    _delay_us(22);
    

    PORTB &= ~_BV(PORTB2);    // start bit
    
    _delay_us(22);
    
    for(uint8_t b=8;b>0;b--) {
         
        if (x&0b00000001)    {
            
            PORTB |= _BV(PORTB2);    // start bit
            
        } else {
            PORTB &= ~_BV(PORTB2);    // stop bit
            
            
            
            //_delay_us(1);
            _delay_us(3);
            
        }
        
        _delay_us(15);
                        
        x>>=1;
                 
    }

    PORTB |= _BV(PORTB2);    // stop bit
    _delay_us(26*3);
    
    
}