call to sub function problem

[kurt48kr]

I have a callbackfunction that calls another subfunction like this:

void myCallbackFunction()
{
    menu.lcd.clear();
    vref=(analogRead(Vref));
    calcVoltage();  **// this is the calling function** 


 while (1)
        {

            /****************exit code************ */
            Return_Button.read(); // get out of loo
            if (Return_Button.wasReleased())
            {
                Serial.println("Break");
                break;
            }
        }

}

Below is the code in another file called "subs.h placed in the folder "include"

#include <header.h>

void calcVoltage()
//(uint16_t vref)
{
  Serial.println("i was here");
  //vref = analogRead(Vref);
  uint16_t voltValue = ((vref * 3.3) / 4095);
  Serial.print("ADC Value = ");
  Serial.print(vref);
  //delay(1000);
  Serial.print("  ");
  Serial.print("Voltage = ");
  Serial.print(voltValue);
  Serial.println(" V");
}

the problem is now that the compiler says ok (no problems) but the compilations stops with a message as follows:
undefined reference to "calcVoltage"
everything works when the code was placed together in the same file.

Another question:

is it possible to nest a SUB_MENU in a SUBMENU??

kind regards
kurtk

[forntoh]

It's always best to declare all your functions before you define them. See this

So please declare all the functions before MAIN_MENU as such:

void myCallbackFunction();
void calcVoltage();

MAIN_MENU(
  // ...
)

// ...


void myCallbackFunction() {
  // ...
}

void calcVoltage() {
  // ...
}

is it possible to nest a SUB_MENU in a SUBMENU??

Yes it is possible.

Example:

extern MenuItem* settingsMenu[];
extern MenuItem* subSettingsMenu[];

MAIN_MENU(
    ITEM_BASIC("Placeholder 1"),
    ITEM_SUBMENU("Settings", settingsMenu));

SUB_MENU(
    settingsMenu,
    mainMenu, // Parent menu
    ITEM_SUBMENU("Sub settings menu", subSettingsMenu),
    ITEM_BASIC("Placeholder 2"));

SUB_MENU(
    subSettingsMenu,
    settingsMenu, // Parent menu
    ITEM_BASIC("Backlight"),
    ITEM_BASIC("Contrast"));

[kurt48kr]

hi
thank you for the answer, sorry for the late response.
kind regards