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Help GLCD port from 8051

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Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph

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mhel

Sat Dec 22 2007, 03:17PM

Registered Member #5217

Joined: Sat Dec 22 2007, 03:02PM

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Hi,
I'm new to arm and microcontrollers, played with pic before but I decided I want to learn arm.
I already have a working LCD driver for t6963c, but I kind of like the buffering technique used in the attached. The driver attached is not mine I found it before I can't remember where actually. I was wondering if any1 could help port the code to gcc arm as I don't have knowledge of 8051 and kind of lost in the code. Or if anyone could just explain how it works I will try to understand it.
EDIT:
Forgot to tell, I'm using LPc2138 with WinARM

TIA.

8051_glcd.zip

[ Edited Sat Dec 22 2007, 03:20PM ]

shyam

Sat Dec 22 2007, 11:20PM

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hi mhel....
it is much easier to have glcd in LPC2138 than 51

only thing... u must know how to handle tje gpios

a thread in corresponding topic is going on i wud like u to go thru it....

cause it is a small issue u can easily do it......

[ Edited Sat Dec 22 2007, 11:25PM ]

lProgress is not made by early risers or hard workers, but by LAZY people, trying to find easier ways to do the same........

mhel

Sun Dec 23 2007, 09:05AM

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Thanks for reply Shyam,

Yes, I have learnt how to control GPIOs, I also have a working LCD but I want to learn how to do the offscreen buffering ( i think that's what it's called). Although from what I have found out, the code uses external memory. I'm hoping it could still be done on the 2138 using the 32k ram.

shyam

Sun Dec 23 2007, 09:47AM

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Joined: Mon Aug 06 2007, 11:33AM

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of course it can be done......

u r not using fonts in ur code....

i have use 18 fonts with my lpc 2148... no problem with that......

try it out...
ne problem i'll be there

lProgress is not made by early risers or hard workers, but by LAZY people, trying to find easier ways to do the same........

mhel

Mon Dec 24 2007, 08:02AM

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Joined: Sat Dec 22 2007, 03:02PM

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hi Shyam,

The attached is my attempt to port the code, but I got stuck, some definitions are not included,
particularly the XBYTES[] array, it's probably in one of the header or it's specific to '51.
The low level routine for the LCD works I know that for sure. I tried to adapt it to the code.

Is your 2148 LCD driver available to download?

Thanks.

shyam

Mon Dec 24 2007, 08:17AM

Registered Member #2984

Joined: Mon Aug 06 2007, 11:33AM

Posts: 723
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well if u really in need...
ok
i'll have it for download here.......
do u only want to show image on lcd???

lProgress is not made by early risers or hard workers, but by LAZY people, trying to find easier ways to do the same........

mhel

Mon Dec 24 2007, 09:25AM

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Joined: Sat Dec 22 2007, 03:02PM

Posts: 36
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Thanks,

Basically, what I want is to draw the font/image in a buffer before actually sending it to the lcd, as it is done the 8051 code, I want to understand how he did it the e.g the mask[]

I won't mind taking a peek at your lcd code tho, thanks again.

shyam

Mon Dec 24 2007, 09:50AM

Registered Member #2984

Joined: Mon Aug 06 2007, 11:33AM

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well mhel i am gonna upload a code .. just see if it helps... otherwise we will surely resume the discussion...
watch out here i'll let u know as soon as the code is uploaded

lProgress is not made by early risers or hard workers, but by LAZY people, trying to find easier ways to do the same........

shyam

Mon Dec 24 2007, 10:23AM

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Joined: Mon Aug 06 2007, 11:33AM

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hi mhel
u can download the library from

http://www.8051projects.net/downloads197.html

lProgress is not made by early risers or hard workers, but by LAZY people, trying to find easier ways to do the same........

This post has been thanked 1 time

mhel

mhel

Mon Dec 24 2007, 10:52AM

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Joined: Sat Dec 22 2007, 03:02PM

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I'll look into it.

thanks.

Edit;

This looks like the same code I got from lpc2000 yahoo group. which I already have working too.
I'm just having a hard time modifying it to output one character at a time instead of drawing a string.
I wanted it to accept newline character and move to the next line too.
The reason I like to have a buffered display is I wanted to implement a vertical scrolling text and from what i've read that's how I could achieved it. Any help on this would be greatly appreciated.

[ Edited Mon Dec 24 2007, 03:01PM ]