1 mobil robototexnikani o’qitish bo’yicha metodika 2021

Surat 42.2: Teg ma’lumotlarining ketma-ket port chiqishi

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143
byte buffer[18];
byte size = sizeof(buffer);
void setup()
{
Serial.begin(9600); // ketma-ket portni ishga tushirish
SPI.begin(); // SPIni ishga tushirish
mfrc522.PCD_Init(); // MFRC522-ni ishga tushirish
// Asosiy qiymat (A yoki B) - fabrikadan 
olingan FFFFFFFFFFFFh qiymati
for (byte i = 0; i < 6; i++)
key.keyByte[i] = 0xFF;
}
void loop()
{
if ( ! mfrc522.PICC_IsNewCardPresent())
return;
// kartani o’qish
if ( ! mfrc522.PICC_ReadCardSerial())
return;
// UID va yorliq turini o’qish natijasini ko’rsatish
Serial.print(F(“Card UID:”));
dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
Serial.println();
Serial.print(F(“PICC type: “));
byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
Serial.println(mfrc522.PICC_GetTypeName(piccType));
// 4-blokdan ma’lumotlarni o’qish
Serial.print(F(“Reading data from block “));
Serial.print(blockAddr);
Serial.println(F(“ ...”));
Serial.print(F(“Data for count “)); Serial.print(blockAddr);
Serial.println(F(“:”));
dump_byte_array(buffer, 2); Serial.println();

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144
Serial.println();
for (byte i = 0; i < 16; i++) // buferga yozish []
dataBlock[i]=buffer[i];
// qarshi baytlarni olish (0 va 1)
int count1=(buffer[0]<<8)+buffer[1];
Serial.print(“count1=”);Serial.println(count1);
count1=count1+1; // hisoblagich o’sishi
dataBlock[0]=highByte(count1);
dataBlock[1]=lowByte(count1);
// Autentifikatsiya key B
Serial.println(F(“Authenticating again using key B...”));
// Blokka baholash yozish
Serial.print(F(“Writing data into block “));
Serial.print(blockAddr);
Serial.println(F(“ ...”));
dump_byte_array(dataBlock, 2); Serial.println();
}
// Ma’lumotlarni HEX shaklida o’qish natijasini chiqarish
void dump_byte_array(byte *buffer, byte bufferSize)
{
for (byte i = 0; i < bufferSize; i++)
{
Serial.print(buffer[i] < 0x10 ? “ 0” : “ “);
Serial.print(buffer[i], HEX);
}
}

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