Help for my project(16f877,2x16LCD,)

[mackrackit]

Do small steps.
You have the LCD working.
Now make the ADC work with 8 bit resolution.
Then do two ADC channels.
Then work on 10 bit for more accuracy.
Then work on the bar graph.

[karamastik]

Okay ,
for ADC :

PORTA = %00000001
RAW var word ' the input voltage
volt var word
Mvolt var byte

START:

ADCIN 0,RAW ' Analog read from #ch0 and move it to RAW
LOOK : IF ADCON0.2=1 THEN LOOK ' when ADC finished ADCON0.2=0
' for 0-5V , 0-1024 - > 5/1024 = 0.0048828 = very small number
'0.0048828*1000 = 4.8828 ( raw/V)
'4.8828 * 256 = 1250 ( 1250 = 5/1024 * 256*1000 ) we made 32bits calculation
Volt=(Raw*/1250)/100
MVolt=Volt//10 ' Mvolt = Volt mod 10
Volt=Volt/10
LCDOUT $FE,2,"VOLT=",#VOLT,",",#Mvolt
PAUSE 500
GOTO START

I tried to read the voltage from LM358 and to write the LCD as Volt.Mvolt
I'm waiting for help.
Thanks.

[karamastik]

Sorry for the flood , but i must ;
i changed the ADC codes , but volt variable does not accept floating numbers :

START:

ADCIN 0,RAW
LOOK : IF ADCON0.2=1 THEN LOOK
Volt=(0,0048828125*RAW)*1000
MVolt=Volt//10 ' Mvolt = Volt mod 10
LCDOUT $FE,2,"VOLT=",#VOLT,",",#Mvolt
PAUSE 500
GOTO START

[skimask]

i changed the ADC codes , but volt variable does not accept floating numbers :

Neither does anything else in PBP...

PORTA=1 : RAW var word : volt var long
START: ADCIN 0,RAW : IF ADCON0.2=1 THEN START
Volt = Raw * 4882813 'round up
LCDOUT $FE , 2 , "V=" , DEC ( volt dig 9 ) , "." , DEC ( volt dig 8 ) , DEC ( volt dig 7 )
LCDOUT DEC ( volt dig 6 ) , DEC ( volt dig 5 ) , DEC ( volt dig 4 ) , DEC ( volt dig 3 )
LCDOUT DEC ( volt dig 2 ) , DEC ( volt dig 1 ) , DEC ( volt dig 0 ) 'get all them digits in there
PAUSE 500
GOTO START

[karamastik]

I was at school ,sorry for the delay.
Thanks for the help but in pbp , i saw that there is no " long " .
It gives error.

[skimask]

I was at school ,sorry for the delay.
Thanks for the help but in pbp , i saw that there is no " long " .
It gives error.

There is if you upgrade to PBP 2.50a.

[karamastik]

Hello again !
I changed my code like that :
(Arkadaşlar yok mu yardımcı olacak ? )

@ DEVICE pic16F877
@ DEVICE pic16F877, WDT_on
@ DEVICE pic16F877, PWRT_ON
@ DEVICE pic16F877, PROTECT_OFF
@ DEVICE pic16F877, HS_OSC

TRISA=%00000001
TRISB=0
TRISE=0


LCDOUT $FE, $40, $00, $1F, $1F, $1F, $1F, $1F, $1F, $00

bar var byte
raw var word
I var byte


DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 0
DEFINE LCD_RSREG PORTE
DEFINE LCD_RSBIT 1
DEFINE LCD_EREG PORTE
DEFINE LCD_EBIT 0
DEFINE LCD_RWREG PORTE
DEFINE LCD_RWBIT 2
DEFINE LCD_BITS 8
DEFINE LCD_LINES 2
DEFINE LCD_COMMANDUS 1000
DEFINE LCD_DATAUS 225
DEFINE ADC_BITS 10
DEFINE ADC_CLOCK 2
DEFINE ADC_SAMPLEUS 100

ADCON1=%10001110
LOW PORTE.2

LCDOUT $FE,1
PAUSE 200


ADCIN 0,raw
bar=(1023-raw)/64
lcdout $fe,2
for I=1 to bar
lcdout ,255
next

END

Is the idea correct , isn't it ?
But it does not work