Based on the Gamebuino at www.gamebuino.com My implentation using an arduino nano dev board The boot loader has been flashed eith a modified version of optiboot. Shall post further developments as I test the board Next shall be the micro sd reader
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Moved by Moderator
Flashed the nano with information at http://gamebuino.com/forum/viewtopic.php?f=12&t=932 Experimental boot loader available at https://drive.google.com/file/d/0BweEjvtKj1KLMnMxNHFlSnZYN2s/edit?usp=sharing
David R. wrote: > At the moment my layout based on this schematic I can see no (in numbers 0) decoupling capacitors at the ATmega... You should NOT conntect Aref to Avcc. Instead you sould connect only a capacitor from Aref to GND:
1 | Vcc --------| Avcc |
2 | | |
3 | .------| Aref |
4 | | | |
5 | 10n..100n === |
6 | | |
7 | --- |
Then you can also make use of the internal reference volatage. And of course you can use Vcc as refeerence voltage also. Simply select it as reference source in the ADC settings.
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Edited by Moderator
Lothar I'm only using the schematic as a guide, I dont have any connection to aref at the moment. But I'll bear it in mind for later
Ive now rewired the board, it looks alot better The sd board is attached, formatted to fat 16, loader.hex and settings.hex are present on the sd card. With the sd card is inserted, the screen backlight has a slight pulsing action, take it out and its steady! Both the screen and the sd module connect to the same clock and mosi. The sd card is running off 5v via its on board regulator and the screen off 3.3v from the nano Next for the buttons
Using the arduino ide and editing the board.txt file Place this code at the end gamebuino.name=Gamebuino Nano gamebuino.upload.tool=avrdude gamebuino.upload.protocol=arduino gamebuino.bootloader.tool=avrdude gamebuino.bootloader.unlock_bits=0x3F gamebuino.bootloader.lock_bits=0x0F gamebuino.upload.maximum_size=30720 gamebuino.upload.maximum_data_size=2048 gamebuino.upload.speed=57600 gamebuino.bootloader.low_fuses=0xFF gamebuino.bootloader.high_fuses=0xDA gamebuino.bootloader.extended_fuses=0x05 gamebuino.bootloader.file=gamebuino_boot/gamebuino_boot.hex gamebuino.build.mcu=atmega328p gamebuino.build.f_cpu=16000000L gamebuino.build.board=AVR_NANO gamebuino.build.core=arduino gamebuino.build.variant=eightanaloginputs Then using a usbasp programmer, connect the icsp header to the nano board. Then goto tools in the ide and select programmer as arduino asp or usbasp, choose board as gamebuino nano then choose burn bootloader Hey presto the bootloader is written and when the sd module is wired pressing c on the clone the bootloader flashes the Gamebuino clone with the loader.hex for choose what ever is on you sd card, game or settings.
Prior to doing the above Download and extract to my documents on windows or the sketch folder if on mac the 3 folders When using the arduino ide, goto examples to see if gamebuino is there, if so you have installed the routines for the Gamebuino clone https://github.com/Rodot/Gamebuino/archive/master.zip
My new layout using single core hook up wire The left button A , the middle button is down, the right button is C for exiting games and accessing the SD Next a nice pcb with probably just a atmega 328 instead of the nano board
Pete K. wrote: > What is your problemuino? I have no problem, I am the author and this is my post If anyone else would like to build
In my homemade gamebuino,I have problem with sd card(2gb) ,when I insert this card on gamebuino and it start pulsating screen, just like continuously blinking screen, please help me.
Hi. You need a 100nf decoupling capacitor on the supply lines to the lcd.
My latest design. Fully compatible with gamebuino and makerbuino.
David R. wrote: > My new layout using single core hook up wire There is no layout, this is a mess! Get yourself a soldering iron if you wish to become an engineer.
Bastler wrote: > THT components ... really?! > Groundplane? Well, i don't see any sense in recreating something that already exists except learning purpose. But whats the problem with THT? It's easy to solder and absolutely OK for home made projects like this. And theres no need for a ground plane on "slow" mcu's like AVRs, but it would be good for learning how to make perfect layouts. mfg
Woz is in the air wrote: > David R. wrote: >> My new layout using single core hook up wire > > There is no layout, this is a mess! Get yourself a soldering iron if > you wish to become an engineer. Why don't You all stop bitching. If you don't like it, don't comment with shit criticism. This is a diy version of a smd board for noobs to make. See my website at www.makerbuino.com
I also made a diy gamebuino. bootloader from rodot's file going to arduino uno. same schematics. but sd card doesn't flash after pressing C button. LEFT button is pressed already, i removed the LEFT button wiring & ground but at the SETTINGS, LEFT cursor is enable already. I uploaded the LOADER.ino in the arduino uno & my sd card is read, still my LEFT cursor is a problem. Do I missing something?
I also made a diy gamebuino. bootloader from rodot's file going to arduino uno. same schematics. but sd card doesn't flash after pressing C button. LEFT button is pressed already, i removed the LEFT button wiring & ground but at the SETTINGS, LEFT cursor is enable already. I uploaded the LOADER.ino in the arduino uno & my sd card is read, still my LEFT cursor is a problem. Do I missing something?
Believe you need pin 4 if digital pin on arduino uno dev board for left
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I'm only using the schematic as a guide, I dont have any connection to aref at the moment.
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I'm only using the schematic as a guide.. https://get-vidmateapp.com/home/ https://get-mobdroapk.com
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