[Question] Support for the RST and IO36 button on the TTGO VGA32 v1.4

[guidol70]

I recognized that your PC-Emulator does work (will do a Reset) if the RST-Button under the Keyboard-connector is pressed and I did see/read that you are using GPIO12 for preferences.clear with the ANSI-Terminal sketch.

Also I did understand/read that GPIO12 shouldnt be used when the MicroSD-Card is in use (or is this only GPIO02?) because of the boot-init/flash-voltage.

So my Questions:
Is the RST-Button GPIO12? Or how (when you didit program) did you get the RST-Button working for the PC-Emulator?

If RST is GPIO12 I couldnt/shlouldnt use it. Then I would support the secind button (GP)IO36 under the Mouse.Connector.

But my follwing (shorted) code didnt work :( It seems that the sketch (based on a older ANSI-Terminal-sketch) never execute/reach the "void loop":

#define RESET_PIN 36

void setup(void)	{
   pinMode(RESET_PIN, INPUT);
					}

void loop(void) 	{
  if (digitalRead(RESET_PIN) == 1)
     _reboot;
					}

I have "successful" tested (GP)IO36 in the "void setup" section - that means I had to press IO36 to complete the execution of the "void setup" section.

Could you please give me a hint where I can put such a reset-routine?

PS: _reboot is my own defined reboot function (some display/sound/countdown) ;)

[guidol70]

I found out (in "void setup") that when (GP)IO36 is pressed it isnt HIGH, but LOW:

if (digitalRead(RESET_PIN) == HIGH) {
   _puts("GPIO36 HIGH detected.\r\n");
                                    }
                                    
if (digitalRead(RESET_PIN) == LOW)  {
   _puts("GPIO36 LOW detected.\r\n");
                                    }

but the following doesnt work in "void loop":
if (digitalRead(RESET_PIN) == LOW) { _reboot; }

[guidol70]

So - I sorted the .ino source of the frist tab and his brackets for better reading ;)

Now I know why I didnt reach the "void loop" section :)
The .ino never reaches "void loop" because the execution is intercepted inside the "void setup" after the following instructions:

• Loading CCP
• Output of CCP-Head
• Patching CP/M

So the control is handed over to the CCP - so no chance for my (GP)IO36 :(

[fdivitto]

on TTGO VGA32 v1.4, RTS button is EN pin (ESP32 reset), while the other button is IO36.
IO12 and IO2 are used for the SD Card (other than IO13 and IO14).

Could you please give me a hint where I can put such a reset-routine?

why not a GPIO interrupt?

[guidol70]

why not a GPIO interrupt?

because I didnt know such things (before) - Iam not a real Arduino-code-programmer ;)
I googled the "GPIO Interrupt" and got it working after a few minutes with:

void _esp_reboot(void) {
        _clrscr();
        ESP.restart();
                                      }

attachInterrupt(digitalPinToInterrupt(RESET_PIN), _esp_reboot, FALLING);

Thanks!

Does EN/Reset got a own number or do I write EN in the brackets?
[EDIT] Google did say EN is GPIO0 ;) Now the RST-Button does the Reset :)

// #define RESET_PIN 0  // RST-Button
// #define RESET_PIN 36 // IO36-Button
int RESET_PIN = 0;      // RST-Button
// int RESET_PIN = 36;      // IO36-Button