> ########################################
> #include <pic.h>
> char ee_count = 0;
> char tmp;
>
> void main(void) {
>         OSCCON = 112;   //4Mhz
> //I was not sure if I will need interrupts, and some other version of
> the same code tried to use interrupts, but it didn't happen neither
>         GIE = 1;
>         PEIE = 1;
>         RCIE = 1;
>         ANSEL = 0;
>         TRISA = 0;
>         TRISB = 4;      //RB2 - in, RB5 - out
>         PORTB = 0;
>         TXSTA = 32;     //async mode
>         RCSTA = 128;    //usart enable
>         SPBRG = 2;      //19.2 kbps
>         RA3 = 0;
>         while(1) {
>                RA3 = 1;
>                if (RCIF){
>                       RA0 = 1;
>                       ee_count++; //write on which address in eeprom
>                       EEADR = ee_count;
>                       tmp = RCREG;
>                       EEDATA = tmp;
>                       EECON1 = 4;
> //write eeprom - this is taken from the pic16 documentation and it is working
>                       #asm
>                               movlw 0x55
>                               movwf 0x18d
>                               movlw 0xAA
>                               movwf 0x18d
>                               bsf 0x18c,1
>                       #endasm
>                       while (EECON1 & 2){ //eeprom write finished
>                       #asm
>                                nop
>                       #endasm
>                       }
>                      RA0 = 0;
>                }// if RCIF
>                RA3 = 0;
>         } //main loop
>
> }
> ########################################

> Ivan Petrushev escribió:
>
>
> > ########################################
>  > #include <pic.h>
>  > char ee_count = 0;
>  > char tmp;
>  >
>  > void main(void) {
>  >         OSCCON = 112;   //4Mhz
>  > //I was not sure if I will need interrupts, and some other version of
>  > the same code tried to use interrupts, but it didn't happen neither
>  >         GIE = 1;
>  >         PEIE = 1;
>  >         RCIE = 1;
>  >         ANSEL = 0;
>  >         TRISA = 0;
>  >         TRISB = 4;      //RB2 - in, RB5 - out
>  >         PORTB = 0;
>  >         TXSTA = 32;     //async mode
>  >         RCSTA = 128;    //usart enable
>  >         SPBRG = 2;      //19.2 kbps
>  >         RA3 = 0;
>  >         while(1) {
>  >                RA3 = 1;
>  >                if (RCIF){
>  >                       RA0 = 1;
>  >                       ee_count++; //write on which address in eeprom
>  >                       EEADR = ee_count;
>  >                       tmp = RCREG;
>  >                       EEDATA = tmp;
>  >                       EECON1 = 4;
>  > //write eeprom - this is taken from the pic16 documentation and it is working
>  >                       #asm
>  >                               movlw 0x55
>  >                               movwf 0x18d
>  >                               movlw 0xAA
>  >                               movwf 0x18d
>  >                               bsf 0x18c,1
>  >                       #endasm
>  >                       while (EECON1 & 2){ //eeprom write finished
>  >                       #asm
>  >                                nop
>  >                       #endasm
>  >                       }
>  >                      RA0 = 0;
>  >                }// if RCIF
>  >                RA3 = 0;
>  >         } //main loop
>  >
>  > }
>  > ########################################
>
>  Hi, a little late. I hope is not too late.
>
>  You are not checking for any errors in the reception.  If
>  the RCSTA.OERR bit is set reception will be stopped until
>  CREN is cleared & set again.
>
>  Also, take into consideration that storing a byte in eeprom
>  can last about 4msec and that 1 byte being transmitted at
>  19200bps will delay close to 0.5msec
>
>
>
>
>
>  --
>  ------------------------------
>  Mauricio Giovagnini (Maunix)
>  http://www.maunix.com.ar
>  Cordoba, Arg.
>  LinkedIn Profile: http://www.linkedin.com/in/mgiovagnini
>
>

> Hi there,
> I'm still stuck on that topic, altough I don't have much time to deal with it.
> I've run another test on 1200bps and cheching for OERR as Mauricio
> Giovagnini suggested (thanks!). This is the info I gathered from
> various debugs:
> - there are some numbers in the EEPROM, but these aren't sequential.
> As you can see from the transmitter source I have a variable x that is
> incrementing and sent over the USART on every loop. So it is
> reasonable to see in the EEPROM incrementing numbers (and resetting
> after 255). Instead of that I see random numbers in the memory. Well,
> not so random. There are 7-8 numbers that are repeating all the time.
> This is for example: 66 66 66 90 1E 90 68 66 1E FE DE 68 DE 1E ....
> - interrupt routine is entered properly
> - RCIF is toggled properly
> - OEER errors occure at random intervals and they are more frequent if
> the PIC is being powered for more time. I suppose this is due to the
> IntRC unstability.
>
> I'm thinking about running one final test at 200bps in the near days.
>
> Thanks for all that have been with me so far :)
>