Communicate between tow microcontrollers by using USART

[vhk]

There is one switch in Transmitter part ( Attiny2313 : PORTB.1) and one LED (Attiny2313ORTB.0) in Reciever part. The LED must On and Off with pressing the switch but it not works. What is the problem?

The Codes in Transmitter part: (codevision)

(codewizard-->USART-->Transmitter)
...
int Data;
while(1)
{
Data=PINB.1;
printf( "%u",Data);
};

The Codes in Reciever part:

(codewizard-->USART-->Reciever)
....
int Data=0;
while(1)
{
scanf("%u",Data);
PORTB.0=Data;
};

(TX pin in Transmitter part is connected to RX pin in Reciever part)

Thanks

 

[misterT]

How is the switch connected? Check that the switch actually works and the state of the PORTB.1 actually changes between logic 1 and 0 when the switch is pressed.
Is the code an example code that comes with Codevision? Did you alter the code in any way?