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i have problem with lm35 and adc

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cidik
Guest

i have problem with lm35 and adc

Posted: Wed Jan 09, 2008 6:18 pm

i wrote this code but code is not working Crying or Very sad

can anyone help me? tnx

Code:

#include <16F877.h>
#fuses XT,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD
#use delay(clock=4000000)
#define use_portb_lcd TRUE
#include <lcd.c>

unsigned long int ham;
float voltaj,sicaklik;

void main()
{
setup_psp(PSP_DISABLED); // PSP birimi devre dışı
setup_spi(SPI_SS_DISABLED); // SPI birimi devre dışı
setup_timer_1(T1_DISABLED); // T1 zamanlayıcısı devre dışı
setup_timer_2(T2_DISABLED,0,1); // T2 zamanlayıcısı devre dışı
setup_CCP1(CCP_OFF); // CCP1 birimi devre dışı
setup_CCP2(CCP_OFF); // CCP2 birimi devre dışı
setup_adc(adc_clock_div_32); // ADC clock frekansı internal RC
setup_adc_ports(AN0); // Tüm AN girişleri analog

lcd_init();

set_adc_channel(0);

delay_us(20);

printf(lcd_putc,"\fSicaklik=");

while(1)
{
delay_ms(50);
output_b(0x00);
ham=read_adc();
delay_ms(200);
output_b(0x00);
voltaj=(0.0048828125*ham)*1000;
sicaklik=(voltaj/10)+2;
lcd_gotoxy(10,1);
printf(lcd_putc,"%5.1f'C",sicaklik);
delay_ms(200);
output_high(pin_b0);
}
}

deepakomanna

Joined: 06 Mar 2007
Posts: 92
Location: Pune,India

Re: i have problem with lm35 and adc

Posted: Thu Jan 10, 2008 2:43 am

cidik wrote:

i wrote this code but code is not working Crying or Very sad

can anyone help me? tnx

Code:

try this,
SETUP_ADC_PORTS(sAN0|VSS_VDD );
& while reading ADC folow this ,
SET_ADC_CHANNEL(0);
DELAY_US(20);
TEMP_VALUE = READ_ADC();
SETUP_ADC(ADC_OFF);

hope i helped you Very Happy

_________________
Thank You,
With Best Regards,
Deepak.

SET

Joined: 15 Nov 2005
Posts: 161
Location: Glasgow, UK

Posted: Thu Jan 10, 2008 10:58 am

Quote:

Code:

delay_ms(50);
output_b(0x00); <---
ham=read_adc();
delay_ms(200);
output_b(0x00); <---
voltaj=(0.0048828125*ham)*1000;
sicaklik=(voltaj/10)+2;
lcd_gotoxy(10,1);
printf(lcd_putc,"%5.1f'C",sicaklik);

Why do you write 0 to Port B twice? It looks like you use Port B for the LCD module comms:

Quote:

Code:

#define use_portb_lcd TRUE

Guest

Posted: Thu Jan 10, 2008 1:48 pm

SET wrote:

Quote:

Code:

delay_ms(50);
output_b(0x00); <---
ham=read_adc();
delay_ms(200);
output_b(0x00); <---
voltaj=(0.0048828125*ham)*1000;
sicaklik=(voltaj/10)+2;
lcd_gotoxy(10,1);
printf(lcd_putc,"%5.1f'C",sicaklik);

Why do you write 0 to Port B twice? It looks like you use Port B for the LCD module comms:

Quote:

Code:

#define use_portb_lcd TRUE

hi i used this because i wrote a code. this code was sending (1) to b0 when adc_int is activated. i was delete that. and i ll try to delete this lines from program. im newbie on pic and ccs c. tnx for the answer.

Quote:

try this,
SETUP_ADC_PORTS(sAN0|VSS_VDD );
& while reading ADC folow this ,
SET_ADC_CHANNEL(0);
DELAY_US(20);
TEMP_VALUE = READ_ADC();
SETUP_ADC(ADC_OFF);

hope i helped you Very Happy

u are helping me by the answering question. if it will not work i'll thank you anyway. i ll try this dude Wink

thanks

my english is poor sorry for this. take care

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