1 mobil robototexnikani o’qitish bo’yicha metodika 2021

Surat 21.2: 74HC595 smenali registrlardan 
foydalangan holda 4 darajali etti segmentli 
displey uchun ulanish sxemasi

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// joriy raqamning qiymatini saqlash uchun o’zgaruvchan
int number=0;
int number1=0;
int number2=0;
// etti segment ko’rsatkichi
int pindigits[4]={4,5,6,7};
// joriy bitni saqlash uchun o’zgaruvchan
int digit=0;
//
unsigned long millis1=0;
void setup()
{
SPI.begin();
// Pimlarni chiqish sifatida sozlang
pinMode(pin_spi_ss,OUTPUT);
for(int i=0;i<4;i++)
{pinMode(pindigits[i],OUTPUT);
digitalWrite(pindigits[i],HIGH);
}
}
void loop()
{
if(millis()-millis1>=100)
{millis1=millis1+100;
number=number+1;
if(number==10000)
number=0;
}
number1=number;
for(int i=0;i<4;i++)
{
number2=number1%10;
number1=number1/10;
showNumber(number2,i);

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for(int j=0;j<4;j++)
digitalWrite(pindigits[j],HIGH);
digitalWrite(pindigits[i],LOW);
delay(1);
}
}
// etti segmentli ko’rsatkich bo’yicha 
raqamni ko’rsatish funktsiyasi
void showNumber(int num,int dig)
{
byte maska;
digitalWrite(pin_spi_ss,LOW);
if(dig==1) maska=1;
else maska=0;
SPI.transfer(numbers[num]+maska);
digitalWrite(pin_spi_ss,HIGH);
}
}