LCD Config with Atmega8 & HD44780 lcd

[Kayle]

Hello,

i know, it´s possible to config the wii copter with sparkfun serial lcd. I don´t have a serial lcd, but i have a HD44780 and an atmega8, which "simulates" the sparkfun lcd.

Here is the result. It costs 10€ and is simple to build.

http://www.youtube.com/watch?v=DrKKnFOLH-k

Multi Wii Config is Version 1prebis7

Regards
Kayle

[iontours]

Hi Kayle,
Your project is very interesting. Is there any chance of releasing the mega8 source code here?


Regards
Spiros

[Kayle]

Hi Spiros,

sure is there a chance of releasing the code The code is written in Bascom. It receives the string from the arduino and split it in two strings.

Here it is:

Code: Select all

'--- Multi Wii copter ---
'--- LCD Config ---

'--- Chip ---
$regfile = "m8def.dat"
$crystal = 8000000
$baud = 9600

'--- lcd ---
Config Lcdpin = Pin , Db4 = Portc.0 , Db5 = Portc.1 , Db6 = Portc.2 , Db7 = Portc.3 , E = Portc.4 , Rs = Portc.5
Config Lcd = 20 * 2

'--- Dims ---
Dim Wii_string As String * 36
Dim Wii_name As String * 16
Dim Wii_wert As String * 16

'--- boot ---
Cls
Cursor Off
Wait 1
Locate 1 , 4
Lcd "Multi Wii LCD"
Locate 2 , 3
Lcd "by Kayle / V1.0"
Wait 2
Cls

'--- Main ---
Do
  Inputbin Wii_string

      Wii_name = Mid(wii_string , 3 , 16)
      Wii_wert = Mid(wii_string , 26 , 5)
      Locate 1 , 1
         Lcd "Para: " ; Wii_name
      Locate 2 , 1
         Lcd "Wert =   " ; Wii_wert
Loop

It´s quiete simple but works great.

Regards
Kayle

[iontours]

Thank you Kayle. It is very simple indeed. I think I will make one serial lcd this weekend since I have all the parts.

[Nosepo]

Thank you Kayle, great project....

Do you have the schematics???

[Kayle]

Hey nosepo,

I don't have any shematic. There is only a atmega8 with internal 8 mhz oscillator, 100 nF on vcc -gnd and the lcd ( for connection see sourcecode ). There is nothing more.

Regards kayle

[Nosepo]

Thanks Kayle.

Please, could you adapt the code for 16x2 HD44780 display model?? It have a less price than 20x2 model ones.

[Kayle]

Hey Nosepo,

here is the code for 16x2 lcd.

Code: Select all

    '--- Multi Wii copter ---
    '--- LCD Config ---

    '--- Chip ---
    $regfile = "m8def.dat"
    $crystal = 8000000
    $baud = 9600

    '--- lcd ---
    Config Lcdpin = Pin , Db4 = Portc.0 , Db5 = Portc.1 , Db6 = Portc.2 , Db7 = Portc.3 , E = Portc.4 , Rs = Portc.5
    Config Lcd = 16 * 2

    '--- Dims ---
    Dim Wii_string As String * 36
    Dim Wii_name As String * 16
    Dim Wii_wert As String * 16

    '--- boot ---
    Cls
    Cursor Off
    Wait 1
    Locate 1 , 1
    Lcd "Multi Wii LCD"
    Locate 2 , 1
    Lcd "by Kayle / V1.0"
    Wait 2
    Cls

    '--- Main ---
    Do
      Inputbin Wii_string

          Wii_name = Mid(wii_string , 3 , 16)
          Wii_wert = Mid(wii_string , 26 , 5)
          Locate 1 , 1
             Lcd Wii_name
          Locate 2 , 1
             Lcd Wii_wert
    Loop

regards
Kayle

[Nosepo]

Thank you so much kayle.

I don't know electronics so much and i saw the atmega8 pins in the code but i dont know wich pins corresponds in the datasheet of the atmega. Sorry for my ignorance....

[Kayle]

Hey nosepo,

That's no problem. You must connect following:

Rx pind.0 to arduino rxd
between vcc and gnd (pin 7+8) a 100nF
the lcd like in the code -> example: db4 on lcd connect it to pc0 on atmega, and so on...

If you have any questions, ask it.

Regards kayle

[Nosepo]

Thanks kayle.
I have bought all parts, after i build it i will report...

[Kayle]

Hi nosepo,

Did you build the config lcd?

Kayle

[Nosepo]

Thanks Kayle, please check this. It have the ok??

[Kayle]

Hi nosepo,

Use a tantal cap on vcc and gnd, not an elko. You must connect a 10k resistor on reset to vcc. To program the avr you must connect
miso, mosi, sck and reset.

If you have any questions ask, there is no problem.

Greetings kayle

[Kayle]

Hi nosepo,

Use a tantal cap on vcc and gnd, not an elko. You must connect a 10k resistor on reset to vcc. To program the avr you must connect
miso, mosi, sck and reset.

If you have any questions ask, there is no problem.

Greetings kayle

[Nosepo]

i Kayle.

I did what you said me, please check the new sch...

To adjust the contrast i guess i must put a 10k pot betwen contrast pin and gnd, is in it?, or direct to gnd it can see fine??


I'm planning to program the avr outside the pcb before soldering, some mine friends have greats programmers.

Thank for all

[Kayle]

Hey nosepo,

I connect the contrast to gnd. But it can be different with an other display. You must connect e, rw and rs

Greetings

[Nosepo]

where i connect e, rw and rs, to Gnd??

Is the rest ok??

[Kayle]

Please look at the code. You must connect only db4 to db7, rs and e. Connect rw to gnd. The rest seems to be ok.

Greetings kayle

[Nosepo]

I hope this must be the last one.....

[Kayle]

Hey, thats seems ok. Try it and report.

Greetings

[Nosepo]

Until next week i cant test it......

Thanks Kayle.

[kodox]

Hi kayle, nosepo
i want to thanks for sharing how to connect LCD using the cheapest way..

my question is, can i upload the code to Atmel8 using FTDI Basic Breakout From Sparkfun ? http://www.sparkfun.com/products/9716
link or tutorial ?
hope someone can help me.

[Kayle]

Hey kodox,

You need a programmer to upload the code to the atmel. Search for avr isp. You cannot use
the sparkfun usb to programm the mega8, because on a new chip, there is no bootloader.

Greetings kayle

[killmouse]

Thanks Kayle, your device works. I assembled it work immediately, and without problems.

[Kayle]

Hey killmouse,

Thanks for feedback. Can you post a picture from working lcd? Its for my gallerie.

Greetings kayle

[killmouse]

Make on this scheme, photo until one test.
I will make casing will be more photos.
Scheme
One picture
Sorry for bad English, I from Russia badly know him.

[AgiSer]

Hello Kayle, killmouse
Thanks for great effort.

Device is assembled and work perfect
Source code for LCD16x2 had been little bit changed for fit into atmega48
PCB and schematic by killmouse

[Kayle]

Hey killmouse and agiser,

Thanks for the pictures.

Greetings kayle

[speto_sk]

I'm prepare PCB for WiiLCD with Mega88.
Here is source and PCB: http://code.google.com/p/spetosk-projects/downloads/list

[speto_sk]

I'm prepare PCB for WiiLCD with Mega88.



Here is source and PCB: http://code.google.com/p/spetosk-projects/downloads/list

[speto_sk]

Here is new PCB for WiiLCD for KAYLE code:



Source: http://code.google.com/p/spetosk-projects/downloads/detail?name=WiiLCD%20with%20Mega88%20v.2.rar&can=2&q=#makechanges

Change:

- pin's for connection for LCD
- optimalization
- smallest

[kodox]

thanks speto, if have time i will go to buy part for lcd.

[fibra]

It would be good if somebody publish compiled hex files for both displays.

[williankubo]

It would be good if somebody publish compiled hex files for both displays.

Here.