Arduino uno da kalkulyator #include #include

ARDUINO UNO da KALKULYATOR
#include #include
#include
LiquidCrystal_I2C lcd(0x27,16,2);
Const char keys[4][4]={{'1','2','3','+'},{'4','5','6','-'},{'7','8','9','*'},{' ','0','=','/'}};
byte rows[] = {11, 10, 9, 8};
byte cols[] = {7, 6, 5, 4};
Keypad keypad1 = Keypad( makeKeymap(keys), rows, cols, 4, 4);
int pos=0;
int endkey=0; // 1 - цифра, 2 - действиеб 3 - результат
char buf[32];void setup(){Serial.begin(9600);lcd.init();
lcd.backlight();lcd.cursor();for(int i=0;i<32;i++)buf[i]=0;}void loop() {char key = keypad1.getKey();if(key){Serial.print(key,HEX);Serial.println();addkey(key);}}
void addkey(char k) {switch(k) {case '+': if(endkey==1) { buf[pos]=k;tolcd(k);endkey=2;} break; case '-': if(endkey==1) {buf[pos]=k;tolcd(k);endkey=2;}
break;case '*': if(endkey==1) {buf[pos]=k;tolcd(k);endkey=2;}
break; case '/': if(endkey==1) {buf[pos]=k;tolcd(k);endkey=2;}
break; case ' ': pos=max(0,pos-1);tolcd(k);pos=pos-1;lcd.setCursor(pos%15,pos/15);
if(pos==0) endkey=0; else if(buf[pos-1]>=0x30 && buf[pos-1]<=0x39) endkey=1;
else endkey=2; break;
case '=': if(endkey==1) { buf[pos]=k;tolcd(k);getsumma();endkey=3;} break;
default : if(endkey==3) {startover();pos=0;}buf[pos]=k;tolcd(k);endkey=1;
break;} }void tolcd(char k) { lcd.setCursor(pos%15,pos/15);
lcd.print(k);pos=pos+1;}
void getsumma() {
String number1="";
String number2="";
char d;
int i;
int summa;
for(i=0;i
=0x30 && buf[i]<=0x39)number1+=buf[i];
else break;}
Serial.print("number1=");Serial.print(number1.toInt());d=buf[i];
Serial.print(" d=");Serial.println(buf[i]);
for(i=i+1;i
=0x30 && buf[i]<=0x39) number2+=buf[i];
elsebreak}
Serial.print("number2=");Serial.print(number2.toInt());
switch(d) {
case '+': summa=number1.toInt()+number2.toInt();break;
case '-': summa=number1.toInt()-number2.toInt();
break;case '*': summa=number1.toInt()*number2.toInt();break;
case '/': summa=number1.toInt()/number2.toInt();break;
default: break;}
lcd.setCursor(pos%15,pos/15);
lcd.print(summa);}
void startover() {
for(int i=0;i<=pos;i++) {
buf[i]=0;
}
lcd.clear();}