Hi there,
I’m new to the world of arduino, and to this forum too, but i really want to start working with arduino. I’m currently building a flight simulator, and found a piece of code that i can use to create an autopilot, but there is a problem. I works, and uploads to my arduino, but the display doesn’t show any menu’s, only some strange characters. I tried a lot, but it doesn’t work, and I’m running out of options. can anybody help me, I would really appreciate that.
my code for the autopilot:
#include <Bounce2.h>
#include <Wire.h>
#include "print.h"
#include <inttypes.h>
#include "Print.h"
#include <LiquidCrystal_I2C.h>
// commands
#define LCD_CLEARDISPLAY 0x01
#define LCD_RETURNHOME 0x02
#define LCD_ENTRYMODESET 0x04
#define LCD_DISPLAYCONTROL 0x08
#define LCD_CURSORSHIFT 0x10
#define LCD_FUNCTIONSET 0x20
#define LCD_SETCGRAMADDR 0x40
#define LCD_SETDDRAMADDR 0x80
// flags for display entry mode
#define LCD_ENTRYRIGHT 0x00
#define LCD_ENTRYLEFT 0x02
#define LCD_ENTRYSHIFTINCREMENT 0x01
#define LCD_ENTRYSHIFTDECREMENT 0x00
// flags for display on/off control
#define LCD_DISPLAYON 0x04
#define LCD_DISPLAYOFF 0x00
#define LCD_CURSORON 0x02
#define LCD_CURSOROFF 0x00
#define LCD_BLINKON 0x01
#define LCD_BLINKOFF 0x00
// flags for display/cursor shift
#define LCD_DISPLAYMOVE 0x08
#define LCD_CURSORMOVE 0x00
#define LCD_MOVERIGHT 0x04
#define LCD_MOVELEFT 0x00
// flags for function set
#define LCD_8BITMODE 0x10
#define LCD_4BITMODE 0x00
#define LCD_2LINE 0x08
#define LCD_1LINE 0x00
#define LCD_5x10DOTS 0x04
#define LCD_5x8DOTS 0x00
// flags for backlight control
#define LCD_BACKLIGHT 0x08
#define LCD_NOBACKLIGHT 0x00
#define En B00000100 // Enable bit
#define Rw B00000010 // Read/Write bit
#define Rs B00000001 // Register select bit
LiquidCrystal_I2C lcd(0x27,16,2);
Bounce button1 = Bounce( 3,5 ); // Button digital pin 3 LEFT
Bounce button2 = Bounce( 2,5 ); // Button digital pin 2 RIGHT
Bounce button3 = Bounce( 4,5 ); // Button digital pin 5 ENTER
int button1_oldVal=LOW;
int button2_oldVal=LOW;
int button3_oldVal=LOW;
short menuPage=-1; // Splash screen
const int totPages=6;
char menuPages[][16]={
"AP Module",
"Enable",
"Track",
"Speed",
"Heading",
"Altitude",
"V. Speed"
};
int values[6]={0,0,0,0,0,0};
bool editing=false;
boolean serialStarted=false;
short curr_index=0;
int temp_val[6]={0,0,0,0,0,0};
void setup() {
pinMode(2,INPUT);
pinMode(3,INPUT);
pinMode(4,INPUT);
pinMode(7,OUTPUT);
pinMode(6,OUTPUT);
lcd.init();
lcd.init();
lcd.display();
lcd.noBlink();
lcd.backlight();
lcd.begin(16, 2);
Serial.begin(9600);
}
void loop() {
readSerial();
button1.update ( );
button2.update ( );
button3.update();
int button1_val = button1.read();
int button2_val = button2.read();
int button3_val = button3.read();
// ############# LED
if(values[0]) // Enable bit
digitalWrite(7,HIGH);
else
digitalWrite(7,LOW);
// ************ FIRST ROW
lcd.setCursor(0, 0);
if(menuPage!=-1) {
String t="/6 ";
lcd.print(menuPage+1+t);
}
lcd.print(menuPages[menuPage+1]);
// ************ SECOND ROW
lcd.setCursor(0,1);
int value=getValue();
switch(menuPage){
case -1: // Main
lcd.print("Firmware 1.1");
Serial.println("[AP] Firmware version 1.1");
break;
default:
lcd.print(value);
lcd.print(" -> ");
lcd.print(values[menuPage]);
lcd.print(" ");
break;
}
if(buttonIsPressed(button1.read(), &button1_oldVal))
if(menuPage<totPages-1){
lcd.clear();
menuPage++;
}
if(buttonIsPressed(button2.read(), &button2_oldVal))
if(menuPage>-1){
lcd.clear();
menuPage--;
}
if(buttonIsPressed(button3.read(), &button3_oldVal))
if(menuPage>-1){
values[menuPage]=value;
if(values[0]==0 && menuPage==0){
tone(6,1500,200);
delay(100);
tone(6,1400,200);
delay(100);
tone(6,1500,200);
delay(100);
tone(6,1400,200);
}
writeSerial();
}
}
int getValue() {
switch(menuPage) {
case 0: //Enable
return (int)(round(analogRead(0)/1023.0));
case 1: // Track
return (int)(analogRead(0)/1023.0*360.0);
break;
case 2: // Speed
return (int)(analogRead(0)/1023.0*250.0)+100;
break;
case 3: // Heading
return (int)(analogRead(0)/1023.0*360.0);
break;
case 4: // Altitude
return (int)(analogRead(0)/1023.0*19000.0/100.0)*100+1000;
break;
case 5: // Vertical Speed
return (int)((analogRead(0)/1023.0*4000.0-2000.0)/100.0)*100;
break;
}
}
void writeSerial() {
String json="{ \"en\":"+String(values[0])+", \"trk\" : "+String(values[1])+", \"spd\" : "+String(values[2])+", \"hdg\" : "+String(values[3])+", \"alt\" : "+String(values[4])+", \"vsp\" : "+String(values[5])+" }";
Serial.println(json);
}
void readSerial() {
while(Serial.available()) {
byte curr=Serial.read();
if(curr==60) // < Begin packet
{
serialStarted=true;
curr_index=0;
for(int cont=0;cont<6;cont++)
temp_val[cont]=0;
}
else if(curr>47 && curr<58 && serialStarted) { // It's a number
temp_val[curr_index]=(temp_val[curr_index]*10)+(curr-48);
}
else if(curr==44) { // , delimiter
curr_index++;
}
else if(curr==62) {
if(serialStarted) { // Communication was properly initialized
loadValues();
serialStarted=false;
}
}
}
}
void loadValues() {
Serial.println("[OK-RCV]");
for(int cont=0;cont<6;cont++)
values[cont]=temp_val[cont];
}
boolean buttonIsPressed(int buttValue, int* buttOldVal) {
if(buttValue!= *buttOldVal){
*buttOldVal=buttValue;
if(buttValue==HIGH)
return true;
}
return false;
}
for this project i used an I2C display, arduino uno, 3 buttons, a LED and a rotary encoder.
thanks in advance.