hi all, i m trying to display some text on LCD using pic16f877 but
unable to get that.......... only backlight turns on in LCD
circuit diagram i have made is as follows:
pin 1 of pic to reset button( i hav conncted reset button through pull
up resistance of 9.7k n it is at +5v when reset button is not
pressed.)
8 MHz crystal with 22pf cap on 13 n 14 pin
12 n 31 pin ground
11 n 32 pin to +5 V
pin 27 t0 30 connected to pin 11 to 14 pf LCD respectively
{LCD - PIC
VSS GND
vdd +5v
vee 4k7 reostat
rs RD2
rw gnd
e RD3
d0 gnd
d1 gnd
d2 gnd
d3 gnd
d4 rd4
d5 RD5
d6 RD6
d7 RD7 }
pin 21 to pin 4 of LCD
pin 22 to pin 6 of LCD
lcd pins 1,5,7,8,9 n 10 are grounded
pin 2 of LCD connected to +5 V
n pin 3 to variable rheostat of 4k7
N I M GETTING SINE WAVE ACROSS CRYSTAL WITH REFERENCE TO GRND instead
of square wave
m unable to get the prob.
plzzz help
