AtomS3 Button not defined in M5Unified.h

[myAlterX]

It seems like I can't use the shortcut button implementation on the Unified lib because Btn or BtnA don't seem to be mapping to the proper GPIO in the AtomS3.

Great little device though!

[lovyan03]

Hello, @myAlterX .
Please show me the version of the library you are using and the source code you have tried.

[myAlterX]

Hi!

I'm including:

#include <M5AtomDisplay.h>
#include <M5Unified.h>

then in setup:

  auto cfg = M5.config();

  // external display setting. (Pre-include required)
  cfg.external_display.module_display = false;  // default=true. use ModuleDisplay
  cfg.external_display.atom_display   = true;  // default=true. use AtomDisplay
  cfg.external_display.unit_glass     = false; // default=true. use UnitGLASS
  cfg.external_display.unit_glass2    = false; // default=true. use UnitGLASS2
  cfg.external_display.unit_oled      = false; // default=true. use UnitOLED
  cfg.external_display.unit_mini_oled = false; // default=true. use UnitMiniOLED
  cfg.external_display.unit_lcd       = false; // default=true. use UnitLCD
  cfg.external_display.unit_rca       = false; // default=true. use UnitRCA VideoOutput
  cfg.external_display.module_rca     = false; // default=true. use ModuleRCA VideoOutput

  M5.begin(cfg);

in loop somewhere I test for:

if (M5.BtnA.wasPressed() || M5.BtnB.wasPressed() || M5.BtnC.wasPressed() || M5.BtnEXT.wasPressed())

because this doesn't seem to work, I just read the digital pin for now:

int val = digitalRead(BTN_PIN);
// Handle button press
if (M5.BtnA.wasPressed() || M5.BtnB.wasPressed() || M5.BtnC.wasPressed() || M5.BtnEXT.wasPressed() || val == LOW)

which I have set at the top to 41 thanks to your clever labeling!

const int BTN_PIN = GPIO_NUM_41;

I took a peek at the lib and found this comment:
```cpp
/*
  /// List of available buttons:
  M5Stack BASIC/GRAY/GO/FIRE:  BtnA,BtnB,BtnC
  M5Stack Core2:               BtnA,BtnB,BtnC,BtnPWR
  M5Stick C/CPlus:             BtnA,BtnB,     BtnPWR
  M5Stick CoreInk:             BtnA,BtnB,BtnC,BtnPWR,BtnEXT
  M5Paper:                     BtnA,BtnB,BtnC
  M5Station:                   BtnA,BtnB,BtnC,BtnPWR
  M5Tough:                                    BtnPWR
  M5ATOM:                      BtnA
*/

Which doesn't seem to have any mention of the AtomS3. Don't know if constants are defined. If they are, it doesn't work for me.

Thanks for your quick reply!

[lovyan03]

Are you using M5.update?
You must run M5.update before reading the button.

#include <M5Unified.h>
void setup(void)
{
  M5.begin();
}
void loop(void)
{
  M5.delay(1);
  M5.update();  

  if (M5.BtnA.wasPressed()) {
    M5_LOGE("wasPressed");
  }
}

[myAlterX]

No I was not!
After updating, BtnA does the job.
Thanks very much for your help!

  M5.update();
  if (M5.BtnA.wasPressed()) {
    // works
  }

You may close the issue!