rhodotron
Joined: 20 Apr 2008
Posts: 3
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| printf and lcdputc |
 Posted: Sun May 18, 2008 12:48 pm |
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Hello everybody !!
I am new in this forum and this is my first post. I have to say that this forum is very useful and I have found answers to 99.9% of my questions.
Presently, I am writing a program which takes values incoming into the R232 and then it sends them to a LCD.
My program is running well except that when I use the printf mixed with Lcd_putc, it send some random data on the RS232 port
| Code: | | printf(lcd_putc,"%s",input_str); |
As I am using hyperterminal and the function my_get_string, I have to send manually some backspace in order to send a valid set of data.
I am using a pcidem4 board.
Is there some body have any suggestions to improve this situation ?
thanks in advance for the help
Here is my code :
| Code: |
#include <18f1320.h>
#fuses NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP,H4,NOMCLR,NOFCMEN
#use delay(clock=16000000)
#include "flex_lcd.c"
#include "stdlib.h"
#use rs232(baud=9600, xmit=PIN_B1, rcv=PIN_B4)
#define BUFFER_SIZE 40
#define bkbhit (next_in!=next_out)
#define STRING_SIZE 11
BYTE buffer[BUFFER_SIZE];
BYTE next_in = 0;
BYTE next_out = 0;
#int_rda
void serial_isr()
{
int t;
buffer[next_in]=getc();
t=next_in;
next_in=(next_in+1) % BUFFER_SIZE;
if(next_in==next_out) next_in=t; // Buffer full !!
}
BYTE bgetc()
{
BYTE c;
while(!bkbhit) ;
c=buffer[next_out];
next_out=(next_out+1) % BUFFER_SIZE;
return(c);
}
void my_get_string(char* s, unsigned int8 max)
{
unsigned int8 len;
char c;
--max;
len=0;
putc(0x0D);
putc(8);
putc(8);
do
{
c = bgetc(); // Call bgetc() instead of getc()
if(c==8)
{ // Backspace
if(len>0)
{
len--;
putc(c);
putc(' ');
putc(c);
}
}
else if ((c>=' ')&&(c<='~'))
if(len<=max)
{
s[len++]=c;
putc(c);
}
}
while(c!=13);
s[len]=0;
}
//===================================
void main()
{
char input_str[STRING_SIZE];
int32 value;
byte byte0,byte1,byte2,byte3;
float temps;
enable_interrupts(int_rda);
enable_interrupts(global);
lcd_init();
lcd_putc("\fAlpha pulsing ");
lcd_putc("\nIBA (C) ver 1.0");
output_High(PIN_B3);
delay_ms(2000);
lcd_gotoxy(1,1);
lcd_putc ("rate : ");
while(1)
{
enable_interrupts(int_rda);
output_High(PIN_B3);
printf("\f\r\n");
my_get_string(input_str, STRING_SIZE-1);
disable_interrupts(int_rda);
if (input_str[0]=='R')
{
input_str[0]='0';
value = atoi32(input_str);
byte0 = make8(value,0);
byte1 = make8(value,1);
byte2 = make8(value,2);
byte3 = make8(value,3);
input_str[0]=' ';
lcd_gotoxy(7,1);
Lcd_putc(" ");
lcd_gotoxy(7,1);
printf(lcd_putc,"%s",input_str);
}
}
}
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