Button combo to return back to game list? about nestang HOT 20 CLOSED

Created #34 to track XInput / Xbox 360 support.

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v0.5rc - The Tang Nano 20K Release

SD card support. Now games can be loaded through a MicroSD card. Use tools/nes2img.py to generate the SD card image. A simple menu system allows easy navigation. Press S1 button on the board to return to menu.

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but i would appreciate an menu option in IO pins too, since is very hard to wire a external push button from S1 smd device

Button S1 and pin 48 are both resets.

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Would something like this work for a gamepad button combination? (let's say SELECT+START):

reg [7:0] reset_cnt = 255;      // reset for 255 cycles before start everything
always @(posedge clk) begin
    reset_cnt <= reset_cnt == 0 ? 0 : reset_cnt - 1;
    if (reset_cnt == 0)
        sys_resetn <= ~s1 & ~reset2 | ~(nes_btn[4] & nes_btn[5]);
end``

This would mean using some LEs, but not that many:
![image](https://github.com/nand2mario/nestang/assets/9550134/f51865b5-a630-4c16-92d7-66aa929b84ec)
![image](https://github.com/nand2mario/nestang/assets/9550134/1f1df9f5-b9ac-4a48-9b46-4bd68f35434f)

from nestang.

That piece of code is actually committed after 0.7.1 so you'll need to build from source, or I will put up a test build when I get a chance.

That would be appreciated if you could.

Try this: https://github.com/nand2mario/nestang/releases/tag/v0.7.2rc

from nestang.

Thanks for that, but any info on the button combo? Can we maybe add a button to one of the Tango GPIO to cause a Reset back to the menu?

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the S1 button already does that.

from nestang.

Thank you for that information, I did not see it anywhere or maybe I missed it when searching for it.

from nestang.

but i would appreciate an menu option in IO pins too, since is very hard to wire a external push button from S1 smd device

from nestang.

but i would appreciate an menu option in IO pins too, since is very hard to wire a external push button from S1 smd device

I just checked the schematic and unfortunately the GPIO 88 is not broken out to any of the header pins. But maybe some kind of code can be written to implement the the Menu Return with a controller button combo.

from nestang.

well, its a reset in name purposes only. can be attached to any part of the cpu. but even acting like a reset, does the job to rertun to menu.

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i dont think that a combo joystick button is necessary since we well need to add several LEs do filter de input and may compromises the response time of the joysticks inside nes hardware emulation.. a simple wire connecting this reset pin to gpio would help.

from nestang.

but i would appreciate an menu option in IO pins too, since is very hard to wire a external push button from S1 smd device

Button S1 and pin 48 are both resets.

I just tested this and pin 48 to 3.3v did not do anything neither to GND so is it a different pin other than 48 that is also reset?

from nestang.

i dont think that a combo joystick button is necessary since we well need to add several LEs do filter de input and may compromises the response time of the joysticks inside nes hardware emulation.. a simple wire connecting this reset pin to gpio would help.

Once I get confirmation of what pin actually causes Reset and test it I will likely add code into the ESP32 (BlueRetro) so that Home Buttons on wireless controllers trigger that pin to cause a reset so this way it does not affect any of the LE on the FPGA.

from nestang.

i dont think that a combo joystick button is necessary since we well need to add several LEs do filter de input and may compromises the response time of the joysticks inside nes hardware emulation.. a simple wire connecting this reset pin to gpio would help.

Once I get confirmation of what pin actually causes Reset and test it I will likely add code into the ESP32 (BlueRetro) so that Home Buttons on wireless controllers trigger that pin to cause a reset so this way it does not affect any of the LE on the FPGA.

That piece of code is actually committed after 0.7.1 so you'll need to build from source, or I will put up a test build when I get a chance.

from nestang.

That piece of code is actually committed after 0.7.1 so you'll need to build from source, or I will put up a test build when I get a chance.

That would be appreciated if you could.

from nestang.

That piece of code is actually committed after 0.7.1 so you'll need to build from source, or I will put up a test build when I get a chance.

That would be appreciated if you could.

Try this: https://github.com/nand2mario/nestang/releases/tag/v0.7.2rc

That works perfect now. I'm going to see if I can make the home button enable a pin high on the esp32 and tie it to pin 48 to cause an exit of the game back to the menu.

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This branch should let the user use Start+Select to reset the system: fjpolo/dev_ResetButtonCombo

Bitstream:
NESTang_0v8_SelectStartResetCombo.zip

⚠I use a cheap USB SNES controller, using both this combination and button reset bugs the USB gamepad. But I think it's because of the gamepad itself

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As an update: NESGamepad module will support original NES joysticks, meaning it supports 8BitDo joysticks and its Home button (Select+Dn button combo)

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@nand2mario I guess this issue can be closed

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