serial.h

An application used to vote, for example in the school, where a teacher have a lot of student and want to know their respons to a question. The teacher using a PC can see the answer of all student on his PC. every student have one of this box and they are connected through RS422 and the PC using a rs232/rs422 converter make a polling for each one of this box and can see the key pressed. (by Gianni Franchi).



// Bit delay for 9600 baud  1/9600 = 104 ms

// change it for different baud rate

#define BIT_DELAY       100 // 9600

#define NO_CHAR            0x1234



// variabile that increment ever 10.6 ms

unsigned long MS_TIMER;





// Function definition for serial communication

void TxChar (char ch);

int  RxChar ();

void Init_Serial ();

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