Arduino Programming_Vertical Menu_Mathematics

Hi Sean,

I'm not sure I fully understand, but is this the type of thing you mean?

I didn't really use any math for it, because the sequence you have shown takes up

very little space in ROM, so I just add 1 per iteration.

You could also use strncpy to tidy it, but maybe some microcontroller C libraries may

not have a string implementation (I don't know).

const char myline[]={'0', '1', '2', '3', '4', '5', '0',

                     '1', '2', '3', '4', '5' };

int

main(void)

{

    int i;

    int forever=1;

    do

    {

        for (i=0; i<6; i++)

        {

            printf("%c%c%c%c%c%c%c\n", myline[i], myline[i+1], myline[i+2], myline[i+3],

                                       myline[i+4], myline[i+5], myline[i+6]);

        }

    } while(forever);

    // this line will generate a warning:

    return(0);

}

I just tried it, this is the output:

0123450

1234501

2345012

3450123

4501234

5012345

0123450

1234501

2345012... etc

Thank you so much Shabaz for the quick reply and correctly understanding my intent. I was having a hard time wrapping my head around it. I think I was actually headed in that direction, but couldn't see the loop. I was using this to display a menu on the Arduino. I have the following snipet outputing to the serial monitor.

I started with the the example http://www.hw2sw.com/2011/09/22/circular-menu-in-arduino/2/, but I thought it would look cooler if all options were displayed at once.

/* This is a section of code to display a menu. It is part

of a larger sketch that selects a sensor for calibration.

The sensor measures the differential pressure to determine

the amount of liquid in a tank.

*/

const int modeBtn = 4; //the MODE button

int modeCounter = 0;

int modeState = 0;

int modeLastState = 0;

const int testStart = 3; //the START button

int testState = 0;

// array of tank names

char* tankSet[] = {"15W-40", "5W-30", "Waste", "W-Wash", "Coolant",

"15W-40", "5W-30", "Waste", "W-Wash", "Coolant"};

void setup()                    

{

  Serial.begin(9600);

  pinMode(modeBtn, INPUT);

  pinMode(testStart, INPUT);

  ClearScreen();

        Serial.println("Tank To Calibrate?");

        Serial.println("MODE to scroll or");

        Serial.println("START to select");

}

void loop() 

{

  modeState = digitalRead(modeBtn); //Determine state of MODE Button

  testState = digitalRead(testStart); //Determine state of MODE Button

  int modeCounter = 0;

  if (modeState != modeLastState) //Did it change?

    {

    if (modeState == LOW) //If the MODE button was pressed, start the Menu

      {

      if (modeCounter < 4)

      {

        modeCounter++;

      } else {

        modeCounter = 0;

      }

        ClearScreen(); 

        Serial.println("Tank To Calibrate?");

        Serial.println("MODE to scroll or");

        Serial.println("START to select");

        Serial.print("   >TANK: ");

        Serial.println(tankSet[modeCounter]);

        Serial.print("    tank: ");

        Serial.println(tankSet[modeCounter+1]);

        Serial.print("    tank: ");

        Serial.println(tankSet[modeCounter+2]);

        Serial.print("    tank: ");

        Serial.println(tankSet[modeCounter+3]);

        Serial.print("    tank: ");

        Serial.println(tankSet[modeCounter+4]);

    }

  }

  modeLastState = modeState;

  if (testState == LOW) //The START Button

  {

      Serial.print("Calibrating ");

      Serial.print(tankSet[modeCounter]);

      Serial.println(" Tank.");    

  }

}

void ClearScreen(){

  int i;

  for (i = 0; i < 15; i = i + 1) {

    Serial.println();

  }

}