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pic24FJ128GA010 uart not correct receiving

 
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alexarndt



Joined: 06 Apr 2010
Posts: 1

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pic24FJ128GA010 uart not correct receiving
PostPosted: Wed Apr 07, 2010 9:16 am     Reply with quote
Hi
I'm trying to send a single character to the microcontroller.
On the one side I use the windows Hyperterminal to send the characters.
On the other side I used the delivered functions from the uart2.h.
I made a loop to check if any data I received.
When this happens I read it to my buffer but I do always receive garbage.
It doesn't matter which char I type. It mostly receives something like 0xF4.
These are the used code fragments:
Code:

//initialize the uart

void UART2Init()
{
    // Set directions of UART IOs
   UART2_TX_TRIS = 0;
   UART2_RX_TRIS = 1;
   U2BRG = BAUDRATEREG2;
   U2MODE = 0;
   U2STA = 0;
   U2MODEbits.UARTEN = 1;
   U2STAbits.UTXEN = 1;
     // reset RX flag
    IFS1bits.U2RXIF = 0;
}

// check for new data
char UART2IsPressed()
{
    if(IFS1bits.U2RXIF == 1)
        return 1;
    return 0;
}

//receive data
char UART2GetChar(){
char Temp;
    while(IFS1bits.U2RXIF == 0);
    Temp = U2RXREG;
    IFS1bits.U2RXIF = 0;
    return Temp;
}

// defines from uart2.h

#define BAUDRATE2      9600

// UART IOs
#ifdef  __PIC24FJ64GA004__
#define UART2_TX_TRIS   PPS_UART2_TX_TRIS
#define UART2_RX_TRIS   PPS_UART2_RX_TRIS
#else
#define UART2_TX_TRIS   TRISFbits.TRISF5
#define UART2_RX_TRIS   TRISFbits.TRISF4
#endif

Thats it. I hope someone could help.
Regards Alex
FvM



Joined: 27 Aug 2008
Posts: 2337
Location: Germany

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PostPosted: Wed Apr 07, 2010 10:02 am     Reply with quote
CCS C has built-in functions for UART handling, that are known to work. Why don't you use it?
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