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PostPosted: Sun Nov 18, 2007 1:48 
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Joined: Sun Nov 18, 2007 1:12
Posts: 3
Hi ,

I'm tring to write programe to interface Fordata LCD module :FDCC0802C
which has KS0066U controller.

I connected the RS E and W/R lines to each pins of one avalable port on my uC (MEGA128 ) and the data pins to another spare port.
I refered to the initialization sequence and used the following init process:

lcd_data=portd;

void lcd_init(void)
{

porta=((0<<RS) | (0<<EN) | (0<<RW));
lcd_data = 0x3c;
delay 40ms;
lcd_data = 0x0f;
delay 40us;
lcd_data = 0x01;
delay 40us;
lcd_data = 0x06;

}
void strob()
{
porta=(1<<en);
dealy40ms;
porta=(0<<en);
}
void lcd_write()
{
lcd_data =c;
strob;
}
void lcd_puts()
{
porta=(1<<RS);
while(*s)
lcd_write(*s++);
}

It seams that i am missing somthing on the init process because the lcd is still not working.
Anyone how is familier with these modules?


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PostPosted: Sun Nov 18, 2007 15:36 
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Joined: Sun May 05, 2002 22:05
Posts: 2063
Location: Lappeenranta, Finland
How have you connected the contrast pin ? Are you sure your contrast should be ok.


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PostPosted: Sun Nov 18, 2007 17:28 
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Joined: Sun Nov 18, 2007 1:12
Posts: 3
The contrast pin is getting 0v at init process and is connected to one of porta pins. i will try to verify its phisical connection but i am doubt it is not well.

I am affraid that the problem is with the write timing sequence .

http://www.fordata.cn/pdf/short/fdcc0802c.pdf


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PostPosted: Mon Nov 19, 2007 20:58 
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Joined: Sun Nov 18, 2007 1:12
Posts: 3
OK , That was quit funny ...
Now the contrast pin is fine vdd and not 0v as i imagened :-(

But still no response from the LCD.


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