Tjyylli

This is my first time dealing with micro controllers and I was assigned to assemble a board with a 8051 micro controller and I was given a code to program it with.

The code should print out "Testing Serial UART" at the beginning but instead it prints out garbage every time I press the reset button to make the code run from the
beginning again I get the same consistent garbage.

I have triple checked the baud rate which is set to 9600 and yet with no luck in running it.

Here is my code:

#include <reg51.h>



#define Input   P0



#define Output  P2



void SetupSerial()

{

    SCON  = 0x50;                       /* SCON: mode 1, 8-bit UART, enable rcvr      */

    TMOD |= 0x20;               /* TMOD: timer 1, mode 2, 8-bit reload        */



    /*  TH1 = ( 256 - ((22.1184MHZ / 12 ) / 32) / BaudRate ) = 256 - 6 = 250  */

    TH1   = 250;                   /* TH1:  reload value for 9600 baud @ 22.1184MHz   */

    TR1   = 1;                  /* TR1:  timer 1 run                          */

    TI = 1;

    RI = 1;  

}



void __putchar(unsigned char ch)

{

        SBUF = ch;

        while(TI == 0);

        TI = 0;

}



unsigned char __getchar()

{

      unsigned char ch;



      while(RI == 0);

      ch = SBUF;

      RI = 0;

      return ch;

}



void printString(const char *s)

{

        while(*s)

            __putchar(*(s++));

}



unsigned char ToASCII(unsigned char val)

{

            if( val >= 0  &&  val <=9 )

                    return val + '0';

            else if ( val   >= 0x0A &&  val <= 0x0F)

                    return val + 'A' - 10;  

            else

                return ' ';

}



void main()

{

     unsigned char key = ' ';

     unsigned char half_port;



     SetupSerial();



     printString("rnTesting Serial UARTrn");



     P1 = 0x0F;

     while(1)

     {

         key = __getchar();



         switch(key)

         {

             case 'R':

             case 'r':

                                    half_port = Input & 0x0F;

                                  __putchar( ToASCII(half_port));

                                    Output = ~half_port; 

                                    break;

         }



     }



}

and this is the diagram I am working on:

This is the garbage i get and every time i press reset on the micro controller the same chars keeps printing from what i understood from this assignment each time we reset it should print "Testing Serial UART" until i send an "R" then it goes on to do something else

And this is my board:

this is the string that appears in text it was only repeated because i pressed reset a few times so the baud rate isn't the problem