Delay for LCD

[MrNobody]

Hi..
I need some help with few delays for LCD.
I am using PIC18F4620 running at 40MHz and am trying to use C18 xlcd library to control LCD.

Inside there I need to create 3 delay functions namely
void DelayFor18TCY(void);
void DelayPORXLCD(void);
void DelayXLCD(void);

For void DelayPORXLCD(void), i can use Delay10KTCYx(15) to generate a delay of 15ms.
And as for DelayXLCD(void); i can use Delay10KTCYx(5) to generate a delay of 5ms.

However, what is the duration of delay for DelayFor18TCY(void).

Please advise.. Thanks..

 

[futz]

If you're doing 44780 LCDs you should have these must-read articles from EPE Magazine:
https://www.electro-tech-online.com/custompdfs/2008/05/lcd1-3.pdf
https://www.electro-tech-online.com/custompdfs/2008/05/lcd2-4.pdf

The information you need is in there.

 

[MrNobody]

I read the C18 Compiler libraries and it wrote the DelayFor18TCY( void ) as

void DelayFor18TCY( void )
{
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
}

Any reason why it is 12 Nop()s..?
Thanks..

 

[MrNobody]

Thanks for the post futz.. Will read it..

 

[Mike - K8LH]

I read the C18 Compiler libraries and it wrote the DelayFor18TCY( void ) as

void DelayFor18TCY( void )
{
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
Nop();
}

Any reason why it is 12 Nop()s..?
Thanks..

Perhaps they're including cycles used for the call or rcall and return instructions?