从while循环退出

Question

Here i am having function like this. problem i am facing while changing Set parameter section. first: i could not able to change Set_parameter Window Second: Since in my loop i am saying if none key pressed display clock.because of that when i enter into Section menu it directly bounce back to Main displaying clock. Is there any way, where i can stay menu section unless Exit/LEFT key pressed

This main function where i am calling my LCD_call Function

 void loop()
    {
     int button;
     while(( button = read_LCD_buttons()) != btnNONE)
     {
     lcd_call();digitalClockDisplay();
     }
    }

LCD_call being called here. LCD_call

Answer 1

break command should break/exit the loop. It could be that the if condition is not coming out to be true, for any input case.

Try debugging your code by placing a break point inside if .

if(button==btnSELECT) { break; // place your breakpoint here. }

and check if your code satifies the if condition for any possible input.

Answer 2

This should work :

void lcd_call()
{
    while ( (button = read_LCD_buttons()) != btnSELECT)
    {
        DS_Counter=Display_selection();

        switch (DS_Counter)
        {
            case 1:
                lcd.setCursor(0,0);
                digitalClockDisplay();
                timedBeep(shortBeep,1);
                break;
            case 2:
                lcd.setCursor(0,0);
                Display_angle();
                timedBeep(shortBeep,1);
                break;
            case 3:
                lcd.setCursor(0,0);
                Display_coordinate();
                timedBeep(shortBeep,1);
                break;
            case 4:
                lcd.setCursor(0,0);
                Display_Wind();
                timedBeep(shortBeep,1);
                break;
            case 5:
                break;
        }
    }
}

Answer 3

You have already given a condition in While loop. As soon as the condition is false, it will break the while loop