[SOLVED] PIC UART Routine Yielding Unexpected Results

[Kfir Maymon]

hi,
sorry for the stupid question but what i am doing wrong?

long temp=0;
char txtt[11];

void init(){
CM1CON0=0x07;
ANSEL=0x0f;
TRISC=0x00;
TRISB=0xf0;
}


void main() {
init();
UART1_Init(19200);
while(1){

   temp = (1023 * 254);
   IntToStrWithZeros(temp, txtt);
   UART1_Write_Text("TEMP ");
   UART1_Write_Text(txtt);
   UART1_Write_Text("\r\n");

delay_ms(1000);
}
}

i get temp = -02302

 

[ysba]

I think variable "temp" should be an unsigned type. Try before with a smaller value, like just "1024".

 

[Kfir Maymon]

same problem with unsigned,
i start to think i`m crazy.

update: i found the problem,
i needed to change,
this:
IntToStrWithZeros(temp, txtt);
to this:
LongWordToStrWithZeros(temp, txtt);

 

[ysba]

So you should see how the function "IntToStrWithZeros(temp, txtt);" works. What data type does it receive? Maybe even if you pass an unsigned value, inside the function it is treated as signed. Did you try using a small positive value as I suggested before?