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- posted
16 years ago