# Problem with robot program select menu

I have a problem with programming a menu for selecting my programs for my robot.

The program has to show 9 numbers from 1 to 9 on a 7-segment display, representing a program(avoidance, linefollowing,....)

With 2 switches you go up or down a number and you comfirm with the 3the button(selecting the program you want). The 3 buttons are 1 input that gives a different value depending which button is pressed.

Now, the program I have written( in C) only gives a 9 when I start up the robot(not 1 of the buttons has effect on the numer appearing). I was wondering if you guys would help me find the solution to my robots problem.

Thanks, Danny

Here is my code.

void ShowNumber(void)
{
if(Number=1)
{
NumberOne();// Is showed on the display
}
if(Number=2)
{
NumberTwo();// Is showed on the display
}
if(Number=3)
{
NumberThree();// Is showed on the display
}
if(Number=4)
{
NumberFour();// Is showed on the display
}
if(Number=5)
{
NumberFive();// Is showed on the display
}
if(Number=6)
{
NumberSix();// Is showed on the display
}
if(Number=7)
{
NumberSeven();// Is showed on the display
}
if(Number=8)
{
NumberEight();// Is showed on the display
}
if(Number=9)
{
NumberNine();// Is showed on the display
}

}

void Choseprogram(void)
{
keuzesensor=a2dConvert8bit(3);
while(keuzesensor < 150 || keuzesensor > 110)// If the confirmbutton isn't pushed
{
keuzesensor=a2dConvert8bit(3);

if(keuzesensor > 170 && keuzesensor < 210)//1ste button
{
Number+=1;
delay_cycles(10500);
}

if(keuzesensor > 60 && keuzesensor < 90)//second button
{
Number-=1;
delay_cycles(10500);
}

if(Number> 9)
{
Number=9;
}

if(Number< 1)
{
Number=1;
}

ShowNumber();
delay_cycles(1000);
}

## Comment viewing options

You need the double equals sign for comparing.

if (Number==1)...

Did you do debounce of button?

yeah that what the delay is for.

You might also be better off with a switch case statement

http://www.arduino.cc/en/Reference/SwitchCase

You can also change;

if(Number> 9)
{
Number=9;
}

to

if (Number > 9) Number = 9;

for a more compact syntax.

== should be used, put a 10nF cap in paralel with the button for debounce and you could simply use a switch - case statement and change the button counter in an interrupt

The robot menu works fine now.

Gonna finish all the different programs now(line following, avoidance, wall following,...)

Danny

hm my line following code for 5 sensors eats up 4kb of flash of 8kb... :| wonder how will you make those 9 menus even with LCD library too

I don't use an lcd, just 1 7-segment led display.

Danny

thats seven ports no matter how I calculate... or do you use register shifter via I2C?

This chip turn 4 outputs(BCD) from my microcontroller in outputs for the 7-segment display.

Danny