More Powerful LCD Commands

[shahidali55]

Can it be done without using a PIC on the slave side?
Like 12F629 --> Shift register --> LCD

[skimask]

Can it be done without using a PIC on the slave side?
Like 12F629 --> Shift register --> LCD

See your other post on the subject. The idea is well documented in Myke Predko's book. All you have to do is think about it a bit...the idea will hit...

[mister_e]

Yes the shift register could work... As long as you can deal with the limitations. It's a cheap an proved to work solution so far.

anyway, here's the link Skimask talked about http://www.myke.com/lcd.htm

[shahidali55]

mister-e , in the "C" psuedo-code give on the link mentioned above ,
This is what i understood so far.
To send any data to the LCD, the "LCDNybble" function has to be called twice with the character / command data in the variable "Nybble".
The Nybble variable should be fed with the corresponding upper and lower bits sequentially.

Does the "LCDNybble" function take care of pulsing the E pin of LCD?
Myke has mentioned that before strobing the E pin, a 450ns pause is necessary.
Will PAUSEUS 1 work?

[skimask]

Myke has mentioned that before strobing the E pin, a 450ns pause is necessary.
Will PAUSEUS 1 work?

PAUSEUS 1 = 1000ns
1000ns > 450ns
Yes

[mister_e]

Math are good... but depending your OSC speed, you may want to use a serie of @ NOP instead.

Have a look in the manual about PAUSEUS limitations.

[shahidali55]

Based on the pseudo C code on page http://www.myke.com/lcd.htm,
i made my own code. I have attached it with this post.
Can someone chech it out and tell if what i've done is correct?
I tested the commands using Dincer's JavaScript LCD Simulator V 1.05.
(http://www.geocities.com/dinceraydin.../djlcdsim.html)
This code should display the digit "1" on the display.