Hi Igor. I would like to ask about the implementation of WiFi network functions in the LGE engine framework. Is it planned? Or maybe it is already, but I do not know how to use it? :) 

It would be nice to create games for two players with two ESPboy on the local network like this one for example  https://github.com/piter76/battleship

Thank You for great project :)

ESP8266_little_game_engine.ino 

What do I need to change when using TFT ST7735 and PCF8574 ?

Hi,

I have two questions about the compiler (I don't have a real console yet):

1) I created a little sketch which allows you to test the up, down, left, right, A and B buttons. I don't understand why I can't press all the buttons at the same time. Some are blocked.
See here: https://github.com/Loopingstar/ESPLGE-Buttons-tester

2) How to test the Start and Select buttons in the compiler?
Thank you

Beautiful sketch! 
2.The selection and start buttons are not engaged at the moment. They are on the console and can even be used, but they are not in the emulator. In addition, one of the buttons on the console is used to access the menu. 
1.The support of simultaneous pressing of all buttons (without Select and Start) depends on the keyboard. The touch screen now supports only two keystrokes simultaneously.

Thank you for this very great project! The SPIFF uploader is just fantastic! Question: Why you don't use NodeMCU?

I am sorry for the long wait for an answer. You can use any board that contains esp8266. I used the ones available to me.

Hi Igor, over the summer I forked and rewrote big parts of your engine in inspiration of the PICO-8 fantasy console, naming it ESPiCo.

Some parts of it is a different beast from LGE, in that it doesn't have a sprite draw buffer but dedicated sprite and tilemap memory and such. But most of the basics are just the same. The compiler supports fixed point number handling of some sort and structs.

Anyway, I just wanted to give you gratitude for all the fun I've have tweaking this engine of yours and hope you can make use of some of that code.
https://github.com/mali1741/espico
https://github.com/mali1741/espico_compiler

That sounds awesome! I thought that no one could figure out my code. I am glad that you did it. And I'm interested in the result.

Cool!
I forgot to add that it uses 80 MHz SPI for the TFT, the setup file is included on github now.

I have not looked through your code yet, but does this mean your code can play Pico8 games? Eager to hear your reply.

No, and its not lua. It's more like it uses the same api structure and methology. What it means though is that it's not too hard to rewrite pico8 code to espico code. But we still got all the restrictions with memory and speed to cope with.

Interesting. I have some more questions so I'll just contact you directly. I don't want to flood @Igor 's thread.

Sorry for the ignorance but i need help. Inside the file "ESP8266_little_game_engine.ino", on the void setup you are coding for the mcp23017 instead the pcf8574P, right? Why?

mcp23017 is used by ESPboy. You can use any port extender. You can also connect buttons through resistors to the analog input.

I don't have port extenders handy at the moment so I'll try the resistors route. Has anyone else done this before so I don't have to re-invent the wheel?

https://www.instructables.com/id/How-to-access-5-buttons-through-1-Arduino-input/

You must change the getKey () function in the keyboard.ino file

Ah. Yes, it's similar to how I do it in my other projects. The problem with this is it can't handle multiple keypresses. Still good though. Thanks.

Does it make a difference if I use a pcf8574n instead of a pcf8574p? 

Yes. Can be used. This is the same chip from different manufacturers.

Hello Igor. Could i port your engine for my ESPboy project? 

Yes. I will be happy.

Sorry, ignore the last bit of my previous comment. I've just found the examples in the online editor :)

Looks like an excellent project. I am about to buy an ODROID-GO and was wondering if there were any plans to expand the screen size from 128x128? The ODROID has a 320x240 screen. Also, is there any way to see the code behind some of the bin files?

I ran this firmware on esp32. However, this requires a small alteration of the code.

Hi there!

Is there any plan supporting these small monochrome oled displays?

Thanks!

I did not plan this, but it is possible.

hi there, just try out your firmware and it work. But I use a different kind of ili9341 board and the screen got flipped upside down, is there anyway to change/flipped the screen orientation?

I am using this board:

https://www.tindie.com/products/thirtytwoteeth/game-boy-zero-handheld-edition/

since it is basically an ili9341 breakout without the pi zero I manage to get it running but there is the problem I mention above

In the setup () function, find tft.setRotation (1); and change to tft.setRotation (3); Or try to substitute other values from 0 to 3

Ok, it works. Thanks for the follow up

Anyone is interested in Wii nunchuck support (I didn't have any pcf8574 laying around..)? 

Here I found the instructions for connecting. This is i2c so the scheme does not change. Need to rewrite the button processing code. https://www.instructables.com/id/ESP8266-and-Visuino-WiFi-Remote-Control-Smart-Car-/

Yup, already done it, code can be found in:

https://github.com/mali1741/esp8266_game_engine/tree/nunchuck

Nice project! I've had some problems running some of the games (mars and breakout) on the esp, and found that setinterrupt in cpu.ino didn't use the stack as in cpu.js .  When I changed it to behave like in cpu.js it works fine though.

Im have issues with running games on my ESP hardware also. Can you explain more in detail what you did to fix this problem.

I can get a github pull request out tomorrow, but until then:
in cpu.ino:setinterrupt

shadow_reg[0] = flagsToByte();
for(int8_t j = 1; j <= 15; j++){
shadow_reg[j] = reg[j];
}

should be changed to:

reg[0] -= 2;
writeInt(reg[0], flagsToByte());
for(int8_t j = 1; j <= 15; j++){
reg[0] -= 2;
writeInt(reg[0], reg[j]);
}

and the op return code 0x9A:

for(int8_t j = 15; j >= 1; j--){
reg[j] = shadow_reg[j];
}
byteToFlags(shadow_reg[0]);

should be changed accordingly:

for(int8_t j = 15; j >= 1; j--){
reg[j] = readInt(reg[0]);
reg[0] += 2;
}
byteToFlags(readInt(reg[0]));
reg[0] += 2;

Besides that there are a few cpu-instructions that handles sprites that need a limiter of the spite index ( & 31  as most of them already has).

The patch can now be found in:

https://github.com/mali1741/esp8266_game_engine/tree/fixvm

Strange. This should not be a problem. Interrupt handling through additional registers faster.

Yes, I agree. Somehow I got a full interrupt queue with the shadow reg code.

So I found the error, the reg and shadow_reg arrays are one element short!
int16_t reg[16];
int16_t shadow_reg[16];

should do the trick!

Thanks!

I'm not sure how I'm supposed to run this thing - I uploaded the game.bin file to the esp8266,
but don't know what else should I do/how to proceed.
I've also struggled to hook everything up properly, and I'm not sure if I've done everything correctly. Could you provide a more detalied schematic? Thanks in advance, very nice work!

I use this shields https://www.aliexpress.com/item/TFT-2-4-Touch-Shield-V1-0-0-for-LOLIN-WEMOS-D1-mini-2-4-inch/32919729730.html and https://www.aliexpress.com/item/PCF8574-PCF8574T-I-O-For-I2C-IIC-Port-Interface-Support-Cascading-Extended-Module-For-Arduino-Expansion/32872163401.html

I have everything hooked up and firmware loaded but can't figure out how to load the .bin file into the Esp8266.  Can anyone point me in the right direction? Thanks

https://github.com/esp8266/arduino-esp8266fs-plugin

All uploaded files must be in the data folder.

Cool! A project with open source firmware, but top secret circuit diagram. Why?

Nothing secret. Just a screen on spi and a keyboard on i2c

Thanks. Take a look at this review:

https://habr.com/ru/post/443918