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pic18f4550 float value transmission using usart problem.

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hiren.dave@bhuved.com

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HI,

I designed a program given below. it gives an error. So help me to figure out this problem.
Code: 
#include<P18f4550.h>
#include <usart.h>
#include <ctype.h>
#include<delays.h>
#include<string.h>


void main(void);
void delay(unsigned int );
void sertx(unsigned char);
int i,y=0,j;
char data[]="1.23";
char serx[];
//int str= strlen(data);


void main(void)
{
   
   TRISD=0X00;

TXSTA1=32;
SPBRG1=25;
TXSTA1bits.TXEN=1;
RCSTA1bits.SPEN=1;


for(y=0;data[y]!= '\0';y++)
	{
	serx[y] = data[y];
    sertx(serx[y]);
	}
serx[y]='\0';
}

void sertx(unsigned char k)
{
	while(PIR1bits.TX1IF==0);
   	TXREG1=k;
    delay(30);
}

void delay(unsigned int c )
{

  for(i=0 ;i<=10;i++)
   {
     	for(j=0;j<=135;j++)
		{
		}
}
}







I have already added header files are ctype.h,delays.h,p18f4550.h,string.h and usart.h and linker file.
 

can you desribe the what is wrong ?
 

In my view you need to convert your float in the char array and then only you will able to send this through UART.....I had written a function to convert the float values to char array

refer the code below-

unsigned char * retrun_char(float num)
{
unsigned char p[5];
unsigned char *p1;
// p = ( unsigned char *) malloc(5*sizeof(unsigned char));
unsigned char idigit,idigit1,idecimal, idecimal1;

idigit = num;
idecimal1 =( num - idigit)*100;
if(idecimal1>=10)
{
idecimal= idecimal1/10;
idecimal1 =idecimal1-(idecimal*10);
}
else
{
idecimal = 0;

}

if(idigit >= 10)
{
idigit1=idigit/10;
idigit = idigit - (idigit1*10);
}
else
{
idigit1 = 0;
}
p[0] =idigit1+48;
p[1] =idigit+48;
p[2] = '.';
p[3] = idecimal+48;
p[4]= idecimal1+48;
p1= &p[0];
return p1;

}

Good Luck
 
Sorry friend I forgot to mention error. These are the errors.



Error [1105] symbol 'TXSTA1' has not been defined
Error [1101] lvalue required
Error [1105] symbol 'SPBRG1' has not been defined
Error [1101] lvalue required
Error [1105] symbol 'TXSTA1bits' has not been defined
Error [1151] struct or union object designator expected
:Error [1101] lvalue required
Error [1105] symbol 'RCSTA1bits' has not been defined
Error [1151] struct or union object designator expected
Error [1101] lvalue required
Error [1205] unknown member 'TX1IF' in '__tag_100'
Error [1128] compatible scalar operands required for comparison
Error [1118] scalar type expected in 'while' statement
Error [1105] symbol 'TXREG1' has not been defined

---------- Post added at 06:35 ---------- Previous post was at 06:09 ----------

Hi,


I solved errors. I was little stupid in writing a registers name. I wrote TXREG1 instead of TXREG and all.

Thanks for your help...
 
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    hd.

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