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LCD 16x2 with pic16f877a
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muzakyo

Joined: 31 Mar 2011
Posts: 8
Location: malaysia


Posted: Wed Apr 06, 2011 7:14 am

this is the detail of my hardware processor : 16F877A cytron starter kits : SK40C LCD Microcontroller RD4 RD4 RD5 RD5 RD6 RD6 RD7 RD7 E RB5 RS RB4 RW ground #define LCD_DB4 PIN_D4 #define LCD_DB5 PIN_D5 #define LCD_DB6 PIN_D6 #define LCD_DB7 PIN_D7 #define LCD_E PIN_B5 #define LCD_RS PIN_B4 #define LCD_RW PIN_ ???

PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Wed Apr 06, 2011 12:31 pm

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What about this question:

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3. Measure the voltage on pin 3 of the LCD. What is it ? It should be
approximately 0.5 volts.

roger01

Joined: 31 Mar 2011
Posts: 4

Posted: Fri Apr 08, 2011 1:51 am

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Why when I try the lcd there are nothing display on it? It is look like below picture nothing on it....

Hi Muzakyo!

I used to have this problem as well. In my case I just replaced the oscillator connected to the PIC16F877a. And it worked.

Make sure that your oscillator is really 20MHz (the one you used in your program).

Regards,

Roger

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