Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

LCD not working in Proteus 7

Status
Not open for further replies.
A

aameer

Full Member level 4
Joined
May 12, 2010
Messages
216
Helped
33
Reputation
64
Reaction score
32
Trophy points
1,308
Location
Bangalore
Activity points
2,503
this is my 2nd project to diaplay data in 2x16 character lcd. i have interface with 8051. it worked fine but with PIC 16f877a only LCD backlight is coming but data is not displayed. when i checked with development board for the same program it works fine but in Proteus i cant.
Please help me

Microcontroller -PIC16f877a
LCD pins- 1-gnd,2-vcc,3-10k pot,4-RB0,5-GND,6-RB1, 11 to 14- RB2 to RB5

4Mhz crystal with 22pf capacitors i have connected

for 1st pin i have connected VDD with 10k series resistor
below is my code which works fine with hardware

Code C - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB2_bit;
sbit LCD_D5 at RB3_bit;
sbit LCD_D6 at RB4_bit;
sbit LCD_D7 at RB5_bit;
 
// Pin direction
sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB4_bit;
sbit LCD_D7_Direction at TRISB5_bit;
 
void main()
{
     ADCON1=0x07;//disable ADC
     CMCON=0;//Disable comparators
     Lcd_Init();
     Lcd_Cmd(_LCD_CLEAR);             // CLEAR display
     Lcd_Cmd(_LCD_CURSOR_OFF);        // Cursor off
     Lcd_Out(1,1,"LCD Ready");
     delay_ms(100);
 
}


---------- Post added at 08:06 ---------- Previous post was at 07:35 ----------

LCd working fine now.I removed the oscillator circuit and rest circuit then i got the result

But i am confused whether they are in built in Proteus or what?
 
Last edited by a moderator:

i connected the oscillator it is working fine but when i connect RC circuit to Reset pin the output is not displayed but when i don't connect anything to Reset pin it will work.......
Can u explain why is it so
 

you don't need connect power/reset/osc pins in the protuse environment. please post your design.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top