need help on display problem

[sixty9sandals]

hi every body..
as a newbies, i need help n some advise from anyone who willing to help me..
im doing a temperature measurement project..my problem is i try to display the result on three type of display which is a row of ten leds display, lcd and by pc.. the leds works just find if i just display the data on the leds but it wont display anything if i program it to display the result on the leds together with the lcd and the lcd also wont display anything..im using pic 16f877 and 16X2 lcd..

my code as below..

DEFINE ADC_BITS 10 ' ADC PARAMETER
DEFINE ADC_CLOCK 3
DEFINE ADC_SAMPLEUS 50

DEFINE LCD_DREG PORTD 'CONFIGURE LCD
DEFINE LCD_DBIT 0
DEFINE LCD_RSREG PORTC
DEFINE LCD_RSBIT 2
DEFINE LCD_EREG PORTC
DEFINE LCD_EBIT 3
DEFINE LCD_BITS 8
DEFINE LCD_LINES 2

Define HSER_RCSTA 90h ' serial setting
DEFINE HSER_TXSTA 20h
DEFINE HSER_BAUD 2400
DEFINE HSER_SPBRG 25
Define HSER_CLROERR 1

MEASURED_VALUE VAR word ' declare variable


TRISA = %00000001
TRISB = %00000000
TRISC.0 = %0
TRISC.1 = %0
ADCON0 = %10000101
ADCON1 = %10000000

pause 500

START:

ADCIN 0 , MEASURED_VALUE ' DISPLAY ON LEDS
pause 100
PORTB= ~MEASURED_VALUE.LOWBYTE
pause 100
PORTC.0= ~MEASURED_VALUE.8
pause 100
PORTC.1= ~MEASURED_VALUE.9
pause 100

END

START2:

LCDOUT $FE,1 ' DISPLAY ON LCD
LCDOUT "VALUE: ", BIN MEASURED_VALUE.lowbyte
PAUSE 1000
END

START3:

HSEROUT [ BIN MEASURED_VALUE, 10] ' SEND TO PC
PAUSE 100
GOTO START

END


i hope somebody will teach n advice me on how to solve it..thank you

[skimask]

Try this:

DEFINE ADC_BITS 10 ' ADC PARAMETER
DEFINE ADC_CLOCK 3
DEFINE ADC_SAMPLEUS 50
DEFINE LCD_DREG PORTD 'CONFIGURE LCD
DEFINE LCD_DBIT 0
DEFINE LCD_RSREG PORTC
DEFINE LCD_RSBIT 2
DEFINE LCD_EREG PORTC
DEFINE LCD_EBIT 3
DEFINE LCD_BITS 8
DEFINE LCD_LINES 2
DEFINE HSER_RCSTA 90h ' serial setting
DEFINE HSER_TXSTA 20h
DEFINE HSER_BAUD 2400
DEFINE HSER_SPBRG 25
DEFINE HSER_CLROERR 1
MEASURED_VALUE VAR word : TRISA = 1 : TRISB = 0 : TRISC.0 = %0
TRISC.1 = %0 : ADCON0 = $85 : ADCON1 = $80 : pause 500
START:
ADCIN 0 , MEASURED_VALUE : pause 100
PORTB= ~MEASURED_VALUE.LOWBYTE : pause 100
PORTC.0= ~MEASURED_VALUE.8 : pause 100
PORTC.1= ~MEASURED_VALUE.9 : pause 100
START2:
LCDOUT $FE,1 : LCDOUT "VALUE: ", BIN MEASURED_VALUE.lowbyte : PAUSE 1000
START3:
HSEROUT [ BIN MEASURED_VALUE, 10] : PAUSE 100
GOTO START
END

Let us know what happens...

[sixty9sandals]

hi there..thanks alot.. its realy help..my leds working...but still my lcd wont work..maybe i should check the wiring back..but..still i dont get it..how come ur code make it work but mine not..coz i dont see a big different in ur code..whats wrong with mine?..if u have a time..do plz explain to me

thanks again..

[skimask]

hi there..thanks alot.. its realy help..my leds working...but still my lcd wont work..maybe i should check the wiring back..but..still i dont get it..how come ur code make it work but mine not..coz i dont see a big different in ur code..whats wrong with mine?..if u have a time..do plz explain to me

thanks again..

Try looking for the word 'END' in my code, then try looking for the word 'END' in your code, finally, try looking for the word 'END' in the little green manual.

[sixty9sandals]

i never think that such a small mistake have make me lost 2 days of my life ,figure out what went wrong...again..thanks alot for this wonderful lesson..u have no idea how smiling im now..now im trying to figure out what error ive done in my wiring..hope it wont take my other 2 days of my life...

[skimask]

i never think that such a small mistake have make me lost 2 days of my life ,figure out what went wrong...again..thanks alot for this wonderful lesson..u have no idea how smiling im now..now im trying to figure out what error ive done in my wiring..hope it wont take my other 2 days of my life...

Give the LCD at least a second of 'pause' before you try to write to it. Change the data_us and command_us (as described in the green book) to 2000 for command and about 200 for data (but not over 255, byte value for data_us).
If that doesn't work, play with the contrast voltages, vary it from ground to Vcc on the LCD, hold the LCD at crazy angles and see if you can see anything on it.