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Problem with MpLab :programming UArt for transmitting data....

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fermat7

Member
I have a GPS receiver that transmit data at 4800 bauds....
the task consist of getting the geographical coordinates from the transmitted message:
Code:
$GPGGA,xxxx,xxxxx,xxxxx.......
For that ,i wrote that mplab's code to be implemented on dsPIC30F4011:
Code:
char Rx;
char  Buffer[40];

while(1)
{
if(DataRdyUART1()) 
{ Rx = ReadUART1();
   
    if(Rx == '$')  Buffer[i] = Rx; i++;  
    if(Rx == '\r') {i=0; putsUART1((unsigned int *)Buffer);}
}

}


by that code i expected to get the hole messge on the terminal... but i don't get any thing....


ca someone tell me the problem... especially in the use of the function (putsUARTx)
*the declaration of Buffer ...
*configuration of UARTx register in mplab C30 compiler...!!!


please help as sooon as possible.... thnx
 

fermat7

Member
here is my complete code
Code:
#include "p30f4011a2.h"                      	// dsPIC30F2010 MPU Register
#include "uart.h"


/* Setup Configuration dspic4011 */
_FOSC(CSW_FSCM_ON & XT_PLL16);							// Enable Clock Switching,Enable Fail-Salf Clock
                                                        // Closk Source = Primary XT + (PLL x 16)
_FWDT(WDT_OFF);											// Disable Watchdog 
_FBORPOR(PBOR_ON & BORV_45 & PWRT_64 & MCLR_EN);		// Enable Brown-Out = 4.5V,Power ON = 64mS,Enable MCLR
_FGS(CODE_PROT_OFF);


unsigned char Rx;
unsigned char Longitude[9];
unsigned char Latitude[9];
unsigned char Buffer[80];



int main(void)
{ 
init_uart1(); // Initialise USART module (8 bit,4800 baud rate, no parity bit..)  

 
  
   i=0;
   k=0;
while(1)
{
	     
        if(DataRdyUART1())
          { 
            Rx = ReadUART1();
	    if(Rx == '$') {k=1;i=0;} // when '$' is detected
	    if( (k==1))   {	 
                        	Buffer[i] = Rx; 
				i++;								
			     }

	   if(Rx == '\r') {
                            i=0;
			    k=0;
//----------- .... Loading Data ... --------------------------
			if((Buffer[4] == 'G')&&(Buffer[5] == 'A'))
		   						 {
            						
			for(mm=0;mm<=8;mm++)   {
                                                              Latitude[mm]=Buffer[mm+18];
								          
							     Longitude[mm]= Buffer[mm+31];
								 
								   }
                 putsUART1((unsigned int*) Latitude);
                 putsUART1((unsigned int*) Longitude);
                 }

   }	
}
for the configuration of the UART:
Code:
void init_uart1(void)
{		  
  CloseUART1();										 		// Disable UART1 Before New Config

  // Config UART Interrupt Control
  ConfigIntUART1(UART_RX_INT_DIS &							// Disable RX Interrupt
    		     UART_RX_INT_PR2 &							// RX Interrupt Priority = 2
    		     UART_TX_INT_DIS &							// Disable TX Interrupt
    		     UART_TX_INT_PR3);							// TX Interrupt Priority = 3  

  // Open UART1 = Mode,Status,Baudrate              
  OpenUART1(UART_EN&	//Enable UART(UART Mode)
                        UART_IDLE_STOP & // Disable UART in IDLE Mode
			UART_RX_TX& 
                        UART_DIS_WAKE &	// Disable Wake-Up
			UART_DIS_LOOPBACK&	// Disable Loop Back
			UART_DIS_ABAUD &		// Disable Auto Baudrate
  			UART_NO_PAR_8BIT& // UART = 8 Bit, No Parity
 			UART_1STOPBIT,	// UART = 1 Stop Bit

	  		// Config UART1 Status
 			UART_INT_TX&         // Select Interrupt After TX Complete
	 		UART_TX_PIN_NORMAL &	//Normal U1TX Mode
 			UART_TX_ENABLE &		// Enable U1TX
 	 		UART_INT_RX_BUF_FUL &	// Flasg Set After RX Complete 
  			UART_ADR_DETECT_DIS &  // Disable Check Address 
			UART_RX_OVERRUN_CLEAR,	// Clear Overrun Flag

  			// DSPIC 30F4011 
  			// XTAL = 10.000 MHz
  			// Fosc = 10.000 MHz x 16 = 160.000 MHz
  			// Fcy(UART) = Fosc / 4 
  			//           = 160.000  / 4 = 40.000 MHz
  			// U1BRG = [Fcy/(16xBaud)]-1
  			//       = [40.000 MHz / (16x4800)] - 1
  			//       = 519 = BFH			
  		       519);											
//----------------------------------------------------------------------------------------



on the terminal console ,i get just the first lecture of latitude ... it doesn't loop !!!
 
Last edited:

fermat7

Member
.. just a remark... when i change the Latitude array length to 8... it's loops but nothing appears for Longitude!!...
 
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