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matcobra
Joined: 14 Feb 2011
Posts: 8
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| lcd clear |
 Posted: Fri Mar 25, 2011 10:06 am |
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Hi, can anyone help me how to clear text on lcd then after the next text will show. Example, my coding
| Code: |
#include <16F877A.h>
#device adc=10
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=10000000)
#include <lcd.c>
#define x input (pin_b0) // ph output
#define y input (pin_b1) // voltage output
//#define z input (pin_b2) // glucose output
void main()
{
int16 adc_value;
float value1;
float value2;
float volt;
lcd_init();
setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_DIV_8);
set_adc_channel(0);
while(1)
{
value1=read_adc();
value2=(value1*5)/1023;
volt=value2*2 ;
lcd_putc("\f----:FRUITi:----\n");
delay_ms(100);
if(x==1)
{
if((volt>5.00)&&(volt<=10.00))
{printf(lcd_putc,"T:SWEET",);
printf(lcd_putc,"G:MANY)",);delay_ms(100);}
else if((volt>3.00)&&(volt<=5.00))
{printf(lcd_putc,"T:SWEETSOUR",);delay_ms(3100);}
else if((volt>0.00)&&(volt<=3.00))
{printf(lcd_putc,"T:SOUR",);delay_ms(3100);}
}
if(y==1)
{
{printf(lcd_putc,"VOLTAGE:%3.2f",volt);delay_ms(3100);}
}
}
}
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Based on my coding example...I want to show text "SWEET" 1st then after that LCD screen need to clear then it will showing "MANY". The problem is I dunno how to clear text "SWEET" 1st before showing "MANY". Anyone can help me out for my problem ?
I'm sorry bcause my english vocabulary no so good. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19504
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| Posted: Fri Mar 25, 2011 10:56 am |
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'/f'
If you send this to the LCD, using either 'lcd_putc', or a printf to lcd_putc, it clears the screen.
It is the character for a terminal 'form feed'.
Best Wishes |
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matcobra
Joined: 14 Feb 2011
Posts: 8
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| Posted: Fri Mar 25, 2011 11:20 am |
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| oh ok...then how how i must suposed add that inside my coding....can u show how? |
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vinniewryan
Joined: 29 Jul 2009
Posts: 154
Location: at work
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| Posted: Fri Mar 25, 2011 11:44 am |
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| matcobra wrote: | | oh ok...then how how i must suposed add that inside my coding....can u show how? |
| Code: | #include <16F877A.h>
#device adc=10
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=10000000)
#include <lcd.c>
#define x input (pin_b0) // ph output
#define y input (pin_b1) // voltage output
//#define z input (pin_b2) // glucose output
void main()
{
int16 adc_value;
float value1;
float value2;
float volt;
lcd_init();
setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_DIV_8);
set_adc_channel(0);
while(1)
{
value1=read_adc();
value2=(value1*5)/1023;
volt=value2*2 ;
lcd_putc("\f----:FRUITi:----\n");
delay_ms(100);
if(x==1)
{
if((volt>5.00)&&(volt<=10.00))
{printf(lcd_putc,"T:SWEET \f",);
printf(lcd_putc,"G:MANY \f)",);delay_ms(100);}
else if((volt>3.00)&&(volt<=5.00))
{printf(lcd_putc,"T:SWEETSOUR \f",);delay_ms(3100);}
else if((volt>0.00)&&(volt<=3.00))
{printf(lcd_putc,"T:SOUR \f",);delay_ms(3100);}
}
if(y==1)
{
{
printf(lcd_putc,"VOLTAGE:%3.2f \f",volt);delay_ms(3100);}
}
}
} |
lcd_putc('\f');
Your LCD should be clearing on your first putc() line. What LCD are you using?
_________________
Vinnie Ryan |
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matcobra
Joined: 14 Feb 2011
Posts: 8
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| Posted: Fri Mar 25, 2011 12:17 pm |
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| i used 16x2 lcd,oh okay..i just tried test coding based on ur new post...it's worked...but it clear 1st row also..hmm i just want to clear second row only |
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matcobra
Joined: 14 Feb 2011
Posts: 8
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| Posted: Fri Mar 25, 2011 12:18 pm |
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| i used 16x2 lcd,oh okay..i just tried test coding based on ur new post...it's worked...but it clear 1st row also..hmm i just want to clear second row only |
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vinniewryan
Joined: 29 Jul 2009
Posts: 154
Location: at work
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| Posted: Fri Mar 25, 2011 12:53 pm |
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just remove all of the "\f" that you dont want. If you only want it to clear the second row, then remove the \f from the first row.
Cheers
| Code: | #include <16F877A.h>
#device adc=10
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=10000000)
#include <lcd.c>
#define x input (pin_b0) // ph output
#define y input (pin_b1) // voltage output
//#define z input (pin_b2) // glucose output
void main()
{
int16 adc_value;
float value1;
float value2;
float volt;
lcd_init();
setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_DIV_8);
set_adc_channel(0);
while(1)
{
value1=read_adc();
value2=(value1*5)/1023;
volt=value2*2 ;
lcd_putc("----:FRUITi:----\n");
delay_ms(100);
if(x==1)
{
if((volt>5.00)&&(volt<=10.00))
{printf(lcd_putc,"T:SWEET \f",);
printf(lcd_putc,"G:MANY \f)",);delay_ms(100);}
else if((volt>3.00)&&(volt<=5.00))
{printf(lcd_putc,"T:SWEETSOUR \f",);delay_ms(3100);}
else if((volt>0.00)&&(volt<=3.00))
{printf(lcd_putc,"T:SOUR \f",);delay_ms(3100);}
}
if(y==1)
{
{
printf(lcd_putc,"VOLTAGE:%3.2f \f",volt);delay_ms(3100);}
}
}
} |
Notice how each row has "\f" at the end. Remove this for each line you 'DON'T' want to clear.
| Code: | printf(lcd_putc,"T:SWEET \f",);
printf(lcd_putc,"G:MANY \f)",);
printf(lcd_putc,"T:SWEETSOUR \f",);
printf(lcd_putc,"T:SOUR \f",);
printf(lcd_putc,"VOLTAGE:%3.2f \f",volt); |
_________________
Vinnie Ryan |
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