Hi, I have my project on vscode in a PIO generated folder, with all that is required to run individually. Everything works fine.
I have a bunch of .cpp and .h files in a different directory. I want to be able to add them to my project by including them, but it has not been successful so far. Here is what I do:
In my platformio.ini, I specified the additional directories where my .cpp and .h files are:
[env:ATmega328P]
platform = atmelavr
board = ATmega328P
framework = arduino
upload_protocol = atmelice_isp
upload_flags = -e
upload_port = usb
board_fuses.hfuse = 0xDE
board_fuses.lfuse = 0xFF
board_fuses.efuse = 0x05
build_flags =
-I/Users/jcbsk/OneDrive/Documents/Github/Atmega328p_Addons/include
-I/Users/jcbsk/OneDrive/Documents/Arduino/custom_files/header_files
-L/Users/jcbsk/OneDrive/Documents/Github/Atmega328p_Addons/src
-L/Users/jcbsk/OneDrive/Documents/Arduino/custom_files/src
Then, I have a main.h that includes all of my header files needed for my project. There I #include <> the header files from my external directory. (Then I add this main.h in my main.cpp).
#ifndef MAIN_H
#define MAIN_H
#include "app_config.h"
#include <Arduino.h>
#include <SPI.h>
#include "74HC165.h"
#include "tact.h"
#include "tact_functions.h"
#include "FSM_config.h"
#include "menu.h"
#include "Timers.h"
#include "sleep.h"
/*##################################################################
ADDONS : external headers included if defined in app_config
##################################################################*/
#if FOUR_LCD_CONFIG
// Add PIO libraries
#include <LCD.h>
#include <LiquidCrystal_I2C.h> // F Malpartida's NewLiquidCrystal library
// Addon (external) library
#include <4x20_LCD.h>
#endif
#if ST7789_CONFIG
// Add PIO libraries
#include <Adafruit_ST7789.h> //includes Adafruit_GFX.h
// Addon library
#include <ST7789_oled.h>
#endif
#if DS1307_CONFIG
// Add external libraries
#include <RTClib.h>
// Addon library
#include <DS1307.h>
#endif
#endif // MAIN_H
You see, the ADDONS section at the end of my main.h is supposed to let me work with those header files from my external directory (I called them DS1307.h, ST7789_oled.h and 4x20_LCD.h)
I think so far this works because I am able to access the functions from my external .h files when typing (the intellisense recognizes them). I also can compile when these functions are in my main.cpp, but as soon as the linking starts, an error occurs saying that
<artificial>:(.text.startup+0x2a4): undefined reference to `whatever the function name()'
This means it must be an include problem but I just can’t find it. I include main.h in all of my external headers like so:
#ifndef LCD_FOUR_H
#define LCD_FOUR_H
#include <main.h> //RED SQUIGGLY LINE HERE
/*##################################################
MACROS
##################################################*/
//LCD to I2C pinout
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
#define LED_OFF 1
#define LED_ON 0
/*##################################################
DECLARATION
##################################################*/
extern LiquidCrystal_I2C lcd;
void lcd_setup();
#endif
And there is a red squiggly line on my #include <main.h> in my external files, Saying
#include errors detected.
Please update your includePath. Squiggles are disabled for this translation unit
cannot open source file "main.h
On my external .cpp files I include their respective .h files like so: (and the same red squiggle appears on the #include <> shown below:
#include <4x20_LCD.h> //RED SQUIGGLY LINE HERE
LiquidCrystal_I2C lcd(LCD_I2C_ADDR, En_pin, Rw_pin, Rs_pin, D4_pin, D5_pin, D6_pin, D7_pin);
void lcd_setup() {
lcd.begin(20, 4); // initialize the lcd
//lcd.setBacklightPin(BACKLIGHT_PIN, POSITIVE);
lcd.setBacklight(LED_OFF); //turn on backlight
lcd.backlight(); //Backlight ON if under program control
lcd.setCursor(0, 0); //character 1 on line 0
}
I am almost there, because I can access everything from main.cpp, they just cannot link the libraries?! What am I doing wrong? Thanks!
here is main.cpp:
#include “main.h” //NO SQUIGGLY LINE HERE 
void setup() {
lcd_setup(); //Intellisense finds this function! just cannot link after compiling
}
void loop() {
}