Noob q: ArduinoIDE works, pioarduino does not

[jaley95630]

I got LGFX working under ArduinoIDE, but the same code does not work under VSCode+pioarduino. I am new to pioarduino (just installed it today).

ArduinoIDE:

LovyanGFX by lovyan03 1.2.7 installed
esp32 by Espressif Systems 3.2.0 installed

Arduino code:

/* ****************************************************************
  This Hello World uses the LovyanGFX library instead of TFT_eSPI.
  ***************************************************************** */

/* Set up TFT Display */
#include <LovyanGFX.hpp>       // Include the graphics library
#include <lgfx_user/LGFX_T-DisplayS3.hpp>
#include <LGFX_TFT_eSPI.hpp> // makes it TFT_eSPI compatible??

LGFX tft;  // Create object "tft"

void setup() {
  // put your setup code here, to run once:
  /* Set up USB Port */
  Serial.begin(115200);

  /* Initialize TFT Display, and set non-default items (rotation, font, etc.) */
  tft.init();
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("Hello World!  Hello Serial!");
  tft.println("Hello World!  Hello LGFX_TFT!");
  delay(5000);
}

pioarduino:

[env:lilygo-t-display-s3]
platform = https://github.com/pioarduino/platform-espressif32/releases/download/stable/platform-espressif32.zip
board = lilygo-t-display-s3
framework = arduino
lib_deps = lovyan03/LovyanGFX@^1.2.7

pioarduino Code:

#include <Arduino.h>

/* ****************************************************************
  This Hello World uses the LovyanGFX library instead of TFT_eSPI.
  ***************************************************************** */

/* Set up TFT Display */
#include <LovyanGFX.hpp>       // Include the graphics library
#include <lgfx_user/LGFX_T-DisplayS3.hpp>
#include <LGFX_TFT_eSPI.hpp> // makes it TFT_eSPI compatible??

LGFX tft;  // Create object "tft"

void setup() {
  /* Set up USB Port */
  Serial.begin(115200);

  /* Initialize TFT Display, and set non-default items (rotation, font, etc.) */
  tft.init();
}

void loop() {
  Serial.println("Hello World!  Hello Serial!");
  tft.println("Hello World!  Hello LGFX_TFT!");
  delay(5000);
}

Results on pioarduino:

Serial monitor displays "Hello World! Hello Serial!" as expected.
But nothing on the TFT. I tried adding tft.fillScreen(TFT_GREEN); but it also did nothing.
Not sure how to debug it - help is greatly appreciated!

[jaley95630]

Probably useful to include the lgfx_user/LGFX_T-DisplayS3.hpp :

#pragma once

#define LGFX_USE_V1

#include <LovyanGFX.hpp>

class LGFX : public lgfx::LGFX_Device
{
    lgfx::Panel_ST7789	_panel_instance;
    lgfx::Bus_Parallel8	_bus_instance;
    lgfx::Light_PWM     _light_instance;

public:

  LGFX(void)
  {
    {
      auto cfg = _bus_instance.config();
      // Set up an 8-bit parallel bus for the ST7789 display
      cfg.freq_write =			  20000000;
      cfg.pin_wr =					  8;
      cfg.pin_rd =					  9;
      cfg.pin_rs =					  7; // DC = same as RS
      cfg.pin_d0 =					  39;
      cfg.pin_d1 =					  40;
      cfg.pin_d2 =					  41;
      cfg.pin_d3 =					  42;
      cfg.pin_d4 =					  45;
      cfg.pin_d5 =					  46;
      cfg.pin_d6 =					  47;
      cfg.pin_d7 =					  48;

      _bus_instance.config(cfg);
      _panel_instance.setBus(&_bus_instance);
    }

    {
      auto cfg = _panel_instance.config();

      cfg.pin_cs =					  6;
      cfg.pin_rst =					  5;
      cfg.pin_busy =				  -1; // -1 = disable

      cfg.panel_width =			  170;
      cfg.panel_height =		  320;
      cfg.offset_x =				  35;
      cfg.offset_y =				  0;
      cfg.offset_rotation =	  0;
      cfg.dummy_read_pixel =  8;
      cfg.dummy_read_bits =	  1;
      cfg.readable = 				  false;
      cfg.invert =					  true;
      cfg.rgb_order =				  false;
      cfg.dlen_16bit =				false;
      cfg.bus_shared =				true;

      _panel_instance.config(cfg);
    }

    {
      // Configure the backlight using PWM
      auto cfg = _light_instance.config();

      cfg.pin_bl =					38;
      cfg.invert =					false;
      cfg.freq   =					44100;
      cfg.pwm_channel =			0;

      _light_instance.config(cfg);
      _panel_instance.setLight(&_light_instance);
    }

    setPanel(&_panel_instance);
  }
};

As a side note, I don't understand why I am "supposed to" include <LovyanGFX.hpp> in my main code when the hardware config file includes it anyways.

[jaley95630]

I am truly perplexed. I wanted to try some experiments (like messing with the backlight), but when I uploaded the code above (as a baseline), the failure has gone away. It works perfectly!