problem in uart receiving (correction) - Electronic Circuits Projects Diagrams Free

butters · 4th June 2009, 07:50 AM

i have this code for uart receiving...
it is not working..
can somebody help me?
im trying to send bits from hyperterminal to usart... hence the uart is in receiving side...

Code:

#include <p18C452.h>
#include <usart.h>

char readUSART(void);


void main(void){


	// configure USART
  OpenUSART( USART_TX_INT_OFF  &
             USART_RX_INT_OFF  &
             USART_ASYNCH_MODE &
             USART_EIGHT_BIT   &
             USART_CONT_RX     &
             USART_BRGH_HIGH,25 );

 
firstCh = ReadUSART();
nextCh = ReadUSART();


 while (!DataRdyUSART()) /* busy wait*/;
firstCh = ReadUSART();
while (!DataRdyUSART()) /* busy wait*/;
nextCh = ReadUSART();
  



  //CloseUSART();

}

Pommie · 4th June 2009, 07:57 AM

Try putting semi colons on the while lines,

Code:

    while (!DataRdyUSART());    /* busy wait*/;
    firstCh = ReadUSART();
    while (!DataRdyUSART());    /* busy wait*/;
    nextCh = ReadUSART();

What you have at the moment is the equivalent of,

Code:

    while (!DataRdyUSART()){    /* busy wait*/;
        firstCh = ReadUSART();
    }
    while (!DataRdyUSART()){    /* busy wait*/;
        nextCh = ReadUSART();
    }

Mike.

butters · 4th June 2009, 08:45 AM

is the closeusart(); necessary?

Pommie · 4th June 2009, 10:02 AM

Quote:

Originally Posted by butters

is the closeusart(); necessary?

I doubt it.

Mike.

butters · 4th June 2009, 10:10 AM

i am able to build my programme but when i want to run it, theres an error...

ICD0083: Debug: Unable to enter debug mode. Please double click this message for more information.

Pommie · 4th June 2009, 10:37 AM

That error is generated by the ICD2 not being able to enter debug mode. Click the error message to see the most common reason.

Mike.

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4th June 2009, 08:45 AM	#3
butters	is the closeusart(); necessary?

4th June 2009, 10:10 AM	#5
butters	i am able to build my programme but when i want to run it, theres an error... ICD0083: Debug: Unable to enter debug mode. Please double click this message for more information.

4th June 2009, 10:37 AM	#6
Pommie	That error is generated by the ICD2 not being able to enter debug mode. Click the error message to see the most common reason. Mike.