Comments on: Using LCD Module with AVRs

By: sebasgm

sebasgm — Thu, 17 May 2012 19:03:01 +0000

Hi man, this library is really a god thing!!!

I’m having some troublesand need some help.

When i try to print int or characters, lcd work fine. But when i try with strings, the lcd shows much black squares as characters i try to print… I think the problem is associated with the passing argument to the function, or the way the string is saved on program memory, but i dont know.

I’m working on linux-ubuntu, can the SO, or some routine of it, have something to do?

Thanks

By: Marisha

Marisha — Thu, 17 May 2012 10:53:54 +0000

seriously!! even i have this problem pls help what can be done!!!
i cant understand Hindi!!

By: Avinash

Avinash — Sat, 12 May 2012 04:03:35 +0000

@Deepanshu Lulla

Dekh boss mere ko ise logo pe bahut gussa atta, samjha !

tere ko C ata kya ??? Mere ko to nei lagta tere ko zara bhi ata!

Clearly english me compiler error de raha aur tuhje us saltana bhi nei ata.

Ja jake koi aur kaam kar !

By: Deepanshu Lulla

Deepanshu Lulla — Sat, 12 May 2012 03:11:13 +0000

Hello Mr. Avinash
I wrote the exact code you wrote as in the post,included source files and header files like you said,
earlier it was giving errors such as..

lcd.h:No such file or directory
../lcdtesting.c:7: error: ‘LS_ULINE’ undeclared (first use in this function)
../lcdtesting.c:7: error: (Each undeclared identifier is reported only once
../lcdtesting.c:7: error: for each function it appears in.)
../lcdtesting.c:25: error: ‘LS_ULINE’ undeclared (first use in this function)
Please help..

By: Rohit Soni

Rohit Soni — Sun, 06 May 2012 10:10:19 +0000

Sir i wanted to reverse map the data ports.. hw is this possible? for eg need to connect d4 to pd6, d5 to pd5, d6 to pd4 and d7 to pd3..
how to do this..

By: sss

sss — Sun, 06 May 2012 06:48:18 +0000

I need to show on LCD a function A^A+b, where a and b are introduced with the help of an 6×4 keypad which must have 0-9 , delete, ok, reset button and 10,20 and other values. The LCD is 16×2. Help me with the code in AVR please!!!!

By: zissan

zissan — Tue, 01 May 2012 04:48:56 +0000

thanks sir for the module.

By: TheAntonius

TheAntonius — Thu, 26 Apr 2012 10:10:25 +0000

Whoooa!

That worked right out of the box. Amazing.

Thanks!

By: vick

vick — Sat, 21 Apr 2012 05:28:52 +0000

Can I have this article in pdf form ? want to print them

Thank you

By: Displaying Custom Characters on Alphanumeric LCDs | eXtreme Electronics

Displaying Custom Characters on Alphanumeric LCDs | eXtreme Electronics — Fri, 20 Apr 2012 11:26:41 +0000

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By: Avinash

Avinash — Mon, 16 Apr 2012 03:04:30 +0000

@Diego Thanks !

By: Diego Lara

Diego Lara — Sun, 15 Apr 2012 19:57:28 +0000

Thanks so much. It’s just what I’m looking for. And it works perfectly. Thanks again.

By: Razvan

Razvan — Sun, 15 Apr 2012 16:42:57 +0000

You can turn off the LCD cursor the next way.
First add in lcd.h this line:
*************************************
#define LS_OFF 0B00001100
**********************************
Which turns the LCD ON and the cursor off

Then add in your LCDTest.c this line:
**********************************
InitLCD(LS_OFF);
**********************************
This selects the cursor to be turned off and stops LS_BLINK and LS_ULINE

Hope this helps!

By: Razvan

Razvan — Sun, 15 Apr 2012 08:27:26 +0000

Thank you again Avinash for the tutorials!
I managed to make it 20×4.

Here is what I did:
I changed void LCDGotoXY at the end of “lcd.c” with this part:

********************************************
void LCDGotoXY(uint8_t x,uint8_t y)
{
if(x<40)
{
switch(y)
{
case 0://1 line starts at 0×80(0b10000000)
x|=0b10000000;
break;
case 1://2 line starts at 0xC0(0b11000000)
x|=0b11000000;
break;
case 2://3 line starts at 0×94(0b10010100)
x|=0b10010100;
break;
case 3://4 line starts at 0xD4(0b11010100)
x|=0b11010100;
break;
}
LCDCmd(x);
}
}
********************************************
Thank you again!

By: Razvan

Razvan — Sat, 14 Apr 2012 00:02:57 +0000

Great tutorials!
They are pretty useful for my diploma project.
Can you help me with the modifications needed for the 4×20 or 4×16 LCD?
Thank you again!

By: Pranav

Pranav — Fri, 13 Apr 2012 08:44:06 +0000

You may say that Avinash Ji is exceptional.

By: Mechaboy

Mechaboy — Thu, 12 Apr 2012 18:36:37 +0000

thanx man, u indians are pretty good in tutorial writing easily for beginners. thanx again man

By: Sethu

Sethu — Wed, 11 Apr 2012 18:02:52 +0000

Hey,
Thanks for the tutorial,
My dev board connections to the LCD are as follows,
PD0-PD7 go to the 8 control pins
PB6 goes to Rs
PB7 goes to R/W
and PC7 goes to E,

Please can you tell me what changes i have to make to the lcd.c to get it working….

Thanks
Sethu

PS: i’m using Atmega8 and i’m interfacing the LCD to a custom made dev board

By: Pranav

Pranav — Mon, 19 Mar 2012 17:10:57 +0000

Chock the datasheet of the mcu you are using. Its given clearly. After that, to be certain, use http://www.engbedded.com/fusecalc/

By: vishnu

vishnu — Sun, 18 Mar 2012 11:39:38 +0000

hai avinash,i have a doubt.will the fuse bits vary from frequency to frequency.what will be the fuse bits for 8mhz crystal?