• How To Load Program In At89c51
• How To Load Program Into At89c51

#define dummyData 0xAA

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#define RDY 75 #define NRDY 76

const int _MISO = 4; const int _MOSI = 5; const int _CLK = 3; const int RST = 2;

/* Variable definition block */

byte data; byte AL,AH; // 16-bit address byte lockByte; // embed lock bits here byte SigH,SigL; // Signature Bytes

void setup() { pinMode(_MISO, INPUT); pinMode(_MOSI, OUTPUT); pinMode(_CLK, OUTPUT); pinMode(RST, OUTPUT); Serial.begin(115200); // depends on the setting of the host PC

}

void loop() { while (!Serial.available()); // wait for character if (Serial.available() > 0) switch (Serial.read()) { case 'p': Serial.write(progEnable()); break; case 'r': readProgmem(); Serial.write(data); break; case 'a': while(!Serial.available()); AL = Serial.read(); break; case 'A': while(!Serial.available()); AH = Serial.read(); break; case 'd': while(!Serial.available()); data = Serial.read(); break; case 'S': AH = 0; AL = 0; SigH = readSign(); Serial.write(SigH); break; case 's': AH = 2; AL = 0; SigL = readSign(); Serial.write(SigL); AH = 1; AL = 0; SigL = readSign(); Serial.write(SigL); break; // read SigL case 'o': digitalWrite(RST,1);break; case 'c': digitalWrite(RST,0);break; case 'e': eraseChip(); Serial.write(RDY); break; case 'j': break; case 'w': writeProgmem(); break; }

}

unsigned char SendSPI(unsigned char data) { uint8_t retval = 0; uint8_t intData = data; int t; for (int ctr = 0; ctr < 7; ctr++) { if (intData & 0x80) digitalWrite(_MOSI,1); else digitalWrite(_MOSI,0);

digitalWrite(_CLK,1); delayMicroseconds(1); Download mp3 kisah nabi muhammad saw.

t = digitalRead(_MISO); digitalWrite(_CLK,0);

if (t) retval = 1; else retval &= 0xFE; retval<<=1; intData<<= 1; delayMicroseconds(1); }

if (intData & 0x80) digitalWrite(_MOSI,1); else digitalWrite(_MOSI,0); digitalWrite(_CLK,1); delayMicroseconds(1);

t = digitalRead(_MISO); digitalWrite(_CLK,0); if (t) retval = 1; else retval &= 0xFE;

return retval; }

byte progEnable() { SendSPI(0xAC); SendSPI(0x53); SendSPI(dummyData); return SendSPI(dummyData); }

void eraseChip() { SendSPI(0xAC); SendSPI(0x9F); SendSPI(dummyData); SendSPI(dummyData); delay(520); }

void readProgmem() {

SendSPI(0x20); SendSPI(AH); SendSPI(AL); data = SendSPI(dummyData); }

void writeProgmem() { SendSPI(0x40); SendSPI(AH); SendSPI(AL); SendSPI(data); }

void writeLockBits() { SendSPI(0xAC); SendSPI(lockByte); SendSPI(dummyData); SendSPI(dummyData); }

How To Load Program In At89c51

void readLockBits() { SendSPI(0x24); SendSPI(dummyData); SendSPI(dummyData); lockByte = SendSPI(dummyData); }

How To Load Program Into At89c51

byte readSign() { SendSPI(0x28); SendSPI(AH); SendSPI(AL); return SendSPI(dummyData); }