I tried to use USART on pic18F452 and i am stuck in a point of no
return. I cannot receive anything i type on Hyperterminal.
This is my source written in C18. Is written by me from scratch after
reading a lot of documents and a lot of asm sources. The datasheet of
18f452 was also very helpfull but maybe i am missing something :
//-----------------------------------------------------------------------
        TRISC &= 0x3F;  // Cleaning 6 and 7 bits to be set up later
        TRISC |= 0x80;  // C7 = 1 (Transmit; OUT from PIC), C6 = 0 (Receive; IN to PIC)

        // trying to use 2400 8n1 with 4MHz quartz; standard PICDEM2
        OpenUSART(      USART_TX_INT_OFF &
                        USART_RX_INT_OFF &
                        USART_BRGH_HIGH &
                        USART_CONT_RX &
                        USART_EIGHT_BIT &
                        USART_ASYNCH_MODE, 103);

        putrsUSART ((const far rom char *) "\n\rUn mesaj scurt de test :-)\n\r");
//-----------------------------------------------------------------------

Now, everything works so far. Even if i try to do something like this
after the first line i still see characters on hyperterminal :

//-----------------------------------------------------------------------
        while (1) {
              for (i=0;i<10000;i++) i=i;       //delay...
              c[0] = '.'
              c[1] = 0;
              putsUSART((char *) &c);          //output a dot

        }
//-----------------------------------------------------------------------

c is defined as : unsigned char c[16];
Ok. Now if i am trying to receive some characters using this code into
the while statement i get nothing... I even believe the code freezes
into getsUSART function but i don't really know why. Maybe because
RCIF bit is not getting set...

//-----------------------------------------------------------------------
        while (1) {
                getsUSART((char *) &c, 1);                      // preiau un caracter de pe seriala
                c[1] = 0;
                if (c[0] != 0) {
                        putsUSART((char *) &c);
                        c[0] = 0;
                }
        }
//-----------------------------------------------------------------------

I tried using pooling mode without any interrupt so i will not get
dizzy with all the complicated setup. Still i should at least see
something comming back to my PIC from hyperterminal.
Can someone see where i am making my mistake ?

Thank you in advance for your time
Dumitru Stama

PS. I repaired my olimex icd2 clone using a new PIC16F877 :-) You
helped me identify the cause, thanks !

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