PIC24F16ka102 uart not working

[Shafaq Gul]

Hello!
I am using mplab and proteus...my c code transmits the data but don't receive it.Am really worried.

#define CRYSTAL_FREQUENCY 10000000      /*  10 MHz  */
#define FCY CRYSTAL_FREQUENCY/2UL       /*  Cylce frequency 5 MHz*/

#include <p24F16KA102.h>
#include <libpic30.h>
#include <stddef.h>


/******************************************************************************/

/*  *** Configuration Bits Setting  *** */

//_FGS(GWRP_OFF & GCP_OFF)
//_FOSCSEL(FNOSC_PRI & IESO_OFF)
//_FOSC(POSCMOD_HS & OSCIOFNC_ON & POSCFREQ_HS & FCKSM_CSDCMD)
//_FWDT(WINDIS_OFF & FWDTEN_OFF)
//_FPOR(BOREN_BOR2 & PWRTEN_OFF  & MCLRE_ON)
//_FDS(DSBOREN_OFF & DSWDTEN_OFF)

_FOSCSEL(FNOSC_FRC);                              // Use internal oscillator  (FOSC ~ 8 Mhz)
_FOSC(FCKSM_CSECMD & OSCIOFNC_ON & POSCMOD_NONE);  // RA3 pin is output    FCKSM_CSECMD         Only clock switching enabled;OSCIOFNC_ON          Digital I/O; POSCMD_NONE          Primary disabled
_FWDT(FWDTEN_OFF);                                // Watchdog timer is disabled
_FICD(BKBUG_OFF); 

/******************************************************************************/
/*
 * 
 */
int i;
unsigned char c;
int main(void)
{
  

      

	U2MODE = 0; // Clear UART1 mode register
	U2STA = 0;	// Clear UART1 status register
    U2MODEbits.BRGH=0;
	U2BRG = 25;

    IPC7bits.U2RXIP = 7;    //set recieve interrupt priority to 4
    IPC7bits.U2TXIP=7;
  
   // IEC1bits.U2RXIE = 1;    //recieve interrupt enable
//    IEC1bits.U2TXIE=1;
 //  _U2RXIF=0;              // Clear UART RX Interrupt Flag
//    _U2TXIF=0;
     
     U2STAbits.URXISEL = 0;  //interrupt when any character is recieved
	U2MODEbits.UARTEN = 1;   // Enable UART2 module
	U2STAbits.UTXEN = 1;     // Enable UART2 transmit 

	
TRISBbits.TRISB1=1;
 
U2STAbits.UTXEN=1;


c='m';
while(U2STAbits.UTXBF);
U2STAbits.UTXBF=1;
U2TXREG=c;

while(!U2STAbits.URXDA);
c=U2RXREG;
U2STAbits.URXDA=1;
while(U2STAbits.UTXBF);
U2STAbits.UTXBF=1;
U2TXREG=c;


while(1);









    return 0;
}

 

[milan.rajik]

The receive code should be inside while(1) loop or in ISR. If ISR is used to receive data then UART Rx interrupt has to be setup.

 

[Shafaq Gul]

The receive code should be inside while(1) loop or in ISR. If ISR is used to receive data then UART Rx interrupt has to be setup.

Sir...its still not receiving :sad:

 

[Shafaq Gul]

Can someone check my code.... i tried alot even on another pic but its not working.