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lcd_putc and printf(lcd_putc,...

 
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.C



Joined: 06 May 2004
Posts: 19
Location: Italy

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lcd_putc and printf(lcd_putc,...
PostPosted: Tue May 11, 2004 9:04 am     Reply with quote

Hi,

I'am using this routine to print on the lcd my digits.
Printf(LCD_PUTC...) is more expensive..

void PrintDigit(unsigned int inp)
{

outp[0] = outp[1] = outp[2] = outp[3] = outp[4] = 0;// clear the string


while (inp > 99) {
inp -= 100;
outp[2]++;
}
while (inp > 9) {
inp -= 10;
outp[3]++;
}


outp[4] = inp + 0x30; // add '0' to the results
outp[0] += 0x30;
outp[1] += 0x30;
outp[2] += 0x30;
outp[3] += 0x30;

}

void LCD (int N) {
outp[0] = outp[1] = outp[2] = outp[3] = outp[4] = 0;// clear the string
PrintDigit(N);

if (n>99) { lcd_GOTOXY(9,1); LCD_PUTC(OUTP[2]); }
if (n>9) { lcd_GOTOXY(10,1); LCD_PUTC(OUTP[3]); }
lcd_GOTOXY(11,1); LCD_PUTC(OUTP[4]);

if (n<100) {lcd_GOTOXY(9,1); LCD_PUTC(' '); }
if (n<9) {lcd_GOTOXY(10,1); LCD_PUTC(' '); }



}

/***********/

lcd(200); //example


But I don't know how to print string characters

void Print(int msgIndex) {
int scanMSGLCD;

char const msgLCD[7][17] = { " Hello "," GO ",
" DOWN "," UP ",
etc..

}


IF (MSGINDEX>6) MSGINDEX=0;
lcd_gotoxy(1,2);

for (scanMSGLCD=0;scanMSGLCD<17;scanmsgLCD++) {

>> printf(lcd_putc,"%c",msgLCD[msgIndex][scanmsgLCD]);

}

}

Can you help me to write code for lcd character without printf ?
Thank in advance
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue May 11, 2004 1:36 pm     Reply with quote

Quote:
printf(lcd_putc,"%c",msgLCD[msgIndex][scanmsgLCD]);
Can you help me to write code for lcd character without printf ?


Can't you just do this with a loop ? Read characters from the
string and send them to the lcd driver, one at a time, until you
read an "end of string" character (ie., 0). Then break out of
the loop.

Code:
for(scanMSGLCD=0; scanMSGLCD < 17; scanmsgLCD++)
   {
    c = msgLCD[msgIndex][scanmsgLCD];
    if(c == 0)
       break;
    else
      lcd_putc(c);
   }
.C



Joined: 06 May 2004
Posts: 19
Location: Italy

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PostPosted: Wed May 12, 2004 2:40 am     Reply with quote

yes I think that it is the best way or

do {

ScanMSGLCD++;
c = msgLCD[msgIndex][scanmsgLCD];

lcd_putc(C);
} while (C!=0);


In this case 'Do' is the best
Thanks
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