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MrGreen Guest
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potentiometer and lcd 2x16 problem... |
Posted: Fri Mar 20, 2009 7:32 am |
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How can I show the value of potentiometer? The output of potentiometer is connect directly to pin2 (RA0/AN0) Pic16F877. PortD is use for LCD DB4-DB7,RS,EN. PortB is for LED and Buzzer. Below is the code but it doesn't work. Why??
Code: |
#include<16F877A.h>
#device ADC=8
#fuses XT,NOWDT,NOPROTECT,NOPUT,NOBROWNOUT,NOLVP
#use delay(clock=4000000)
#include<LCD.C>
#define LCD_EN PIN_D0 //lcd pin 6
#define LCD_RS PIN_D1 //lcd pin 4
#define LCD_RW PIN_D2 //lcd pin 5
#define LCD_D4 PIN_D4 //lcd pin 11
#define LCD_D5 PIN_D5 //lcd pin 12
#define LCD_D6 PIN_D6 //lcd pin 13
#define LCD_D7 PIN_D7 //lcd pin 14
#define LED_BUZZER PIN_B7
#define LED_GREEN PIN_B6
#define LED_YELLOW PIN_B5
#define LED_RED PIN_B4
void main(){
set_tris_a(0xff);
set_tris_b(0x00);
set_tris_d(0x00);
setup_adc_ports(ALL_ANALOG);
setup_adc(ADC_CLOCK_INTERNAL);
do{
int8 valuepot;
set_adc_channel(0);
delay_ms(50);
valuepot=read_adc();
delay_ms(50);
lcd_init();
}
while(1);
{
float mvpb;
float result;
int8 valuepot;
mvpb=30.5/255.0;
delay_ms(100);
lcd_gotoxy(1,1);
valuepot=input_A();
result=valuepot*mvpb-16.5;
if((result>=5)&&(result<=16.5))
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("*****TANK:OK******");
output_low(PIN_B7);
output_low(PIN_B5);
output_low(PIN_B4);
output_high(PIN_B6);
}
else if((result>=3)&&(result<5))
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("*****TANK:LOW*****");
output_low(PIN_B7);
output_low(PIN_B6);
output_low(PIN_B4);
output_high(PIN_B5);
}
else if((result>=1)&&(result<3))
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("**TANK:VERY LOW*****");
output_low(PIN_B7);
output_low(PIN_B6);
output_low(PIN_B4);
output_high(PIN_B5);
delay_ms(100);
output_low(PIN_B5);
}
else if((result>=0)&&(result<=1))
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("TANK:REPLACE NOW");
output_low(PIN_B7);
output_low(PIN_B6);
output_low(PIN_B5);
output_high(PIN_B4);
}
else
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("**SORRY!!EMPTY**");
output_high(PIN_B7);
output_high(PIN_B6);
output_high(PIN_B5);
output_high(PIN_B4);
delay_ms(100);
output_low(PIN_B7);
output_low(PIN_B6);
output_low(PIN_B5);
output_low(PIN_B4);
delay_ms(100);
}
delay_ms(1000);
}
} |
Anybody plzzz help me... |
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Ttelmah Guest
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Posted: Fri Mar 20, 2009 8:14 am |
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I'll make two comments:
1) Switch to C variable declarations. Only declare variables at the start of a named function. The ability to declare variables inside 'sections', is a latter construct, and though CCS 'supposedly' supports this, it gains nothing, and quite often leads to problems....
2) Think through your constructs.
Code: |
Do {
} while(TRUE);
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executes _for ever_. How is any code after this going to run?.
Best Wishes |
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PCM programmer
Joined: 06 Sep 2003 Posts: 21708
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MrGreen Guest
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:-/ |
Posted: Sat Mar 21, 2009 8:08 am |
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i still dont get it...anybody plzz help me ... |
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picoman
Joined: 17 May 2009 Posts: 1
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Re: potentiometer and lcd 2x16 problem... |
Posted: Sun May 17, 2009 7:27 am |
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Code: |
#include<16F877A.h>
#device ADC=8
#fuses XT,NOWDT,NOPROTECT,NOPUT,NOBROWNOUT,NOLVP
#use delay(clock=4000000)
#include<LCD.C>
#define LCD_EN PIN_D0 //lcd pin 6
#define LCD_RS PIN_D1 //lcd pin 4
#define LCD_RW PIN_D2 //lcd pin 5
#define LCD_D4 PIN_D4 //lcd pin 11
#define LCD_D5 PIN_D5 //lcd pin 12
#define LCD_D6 PIN_D6 //lcd pin 13
#define LCD_D7 PIN_D7 //lcd pin 14
#define LED_BUZZER PIN_B7
#define LED_GREEN PIN_B6
#define LED_YELLOW PIN_B5
#define LED_RED PIN_B4
void main(){
set_tris_a(0xff);
set_tris_b(0x00);
set_tris_d(0x00);
setup_adc_ports(ALL_ANALOG);
setup_adc(ADC_CLOCK_INTERNAL);
do{
int8 valuepot;
set_adc_channel(0);
delay_ms(50);
valuepot=read_adc();
delay_ms(50);
lcd_init();
}
while(1);
{
float mvpb;
float result;
int8 valuepot;
mvpb=30.5/255.0;
delay_ms(100);
lcd_gotoxy(1,1);
valuepot=input_A();
result=valuepot*mvpb-16.5;
if((result>=5)&&(result<=16.5))
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("*****TANK:OK******");
output_low(PIN_B7);
output_low(PIN_B5);
output_low(PIN_B4);
output_high(PIN_B6);
}
else if((result>=3)&&(result<5))
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("*****TANK:LOW*****");
output_low(PIN_B7);
output_low(PIN_B6);
output_low(PIN_B4);
output_high(PIN_B5);
}
else if((result>=1)&&(result<3))
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("**TANK:VERY LOW*****");
output_low(PIN_B7);
output_low(PIN_B6);
output_low(PIN_B4);
output_high(PIN_B5);
delay_ms(100);
output_low(PIN_B5);
}
else if((result>=0)&&(result<=1))
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("TANK:REPLACE NOW");
output_low(PIN_B7);
output_low(PIN_B6);
output_low(PIN_B5);
output_high(PIN_B4);
}
else
{
printf(lcd_putc,"Weight:%5.2f kg\n",result);
lcd_putc("**SORRY!!EMPTY**");
output_high(PIN_B7);
output_high(PIN_B6);
output_high(PIN_B5);
output_high(PIN_B4);
delay_ms(100);
output_low(PIN_B7);
output_low(PIN_B6);
output_low(PIN_B5);
output_low(PIN_B4);
delay_ms(100);
}
delay_ms(1000);
}
} |
Is very interesting this application.
I want to that realize this application but with load cells weight and d'not know how calibrate this .
Please, dear friend what is reprezent mvpb=30.5 / 255.0 and 16.5 value ?
Thank you very much!
Mirel |
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