OK, the sketch runs but in the code there is a test for an incoming character, " if (Serial.available() > 0)" and in Serial Monitor how do I enter a character? I could remove the line but I suppose it’s there for a reason.
// AVR High-voltage Serial Fuse Reprogrammer
// Adapted from code and design by Paul Willoughby 03/20/2010
// http://www.rickety.us/2010/03/arduino-avr-high-voltage-serial-programmer/
// Fuse Calc:
// http://www.engbedded.com/fusecalc/
#include <Arduino.h>
#define RST 13 // Output to level shifter for !RESET from transistor
#define SCI 12 // Target Clock Input
#define SDO 11 // Target Data Output
#define SII 10 // Target Instruction Input
#define SDI 9 // Target Data Input
#define VCC 8 // Target VCC
#define HFUSE 0x747C
#define LFUSE 0x646C
#define EFUSE 0x666E
// Define ATTiny series signatures
#define ATTINY13 0x9007 // L: 0x6A, H: 0xFF 8 pin
#define ATTINY24 0x910B // L: 0x62, H: 0xDF, E: 0xFF 14 pin
#define ATTINY25 0x9108 // L: 0x62, H: 0xDF, E: 0xFF 8 pin
#define ATTINY44 0x9207 // L: 0x62, H: 0xDF, E: 0xFFF 14 pin
#define ATTINY45 0x9206 // L: 0x62, H: 0xDF, E: 0xFF 8 pin
#define ATTINY84 0x930C // L: 0x62, H: 0xDF, E: 0xFFF 14 pin
#define ATTINY85 0x930B // L: 0x62, H: 0xDF, E: 0xFF 8 pin
byte shiftOut(byte val1, byte val2)
{
int inBits = 0;
//Wait until SDO goes high
while (!digitalRead(SDO))
;
unsigned int dout = (unsigned int)val1 << 2;
unsigned int iout = (unsigned int)val2 << 2;
for (int ii = 10; ii >= 0; ii--)
{
digitalWrite(SDI, !!(dout & (1 << ii)));
digitalWrite(SII, !!(iout & (1 << ii)));
inBits <<= 1;
inBits |= digitalRead(SDO);
digitalWrite(SCI, HIGH);
digitalWrite(SCI, LOW);
}
return inBits >> 2;
}
void readFuses()
{
Serial.println("Reading fuse settings from connected ATtiny.......");
byte val;
shiftOut(0x04, 0x4C); // LFuse
shiftOut(0x00, 0x68);
val = shiftOut(0x00, 0x6C);
Serial.print("LFuse: ");
Serial.print(val, HEX);
shiftOut(0x04, 0x4C); // HFuse
shiftOut(0x00, 0x7A);
val = shiftOut(0x00, 0x7E);
Serial.print(", HFuse: ");
Serial.print(val, HEX);
shiftOut(0x04, 0x4C); // EFuse
shiftOut(0x00, 0x6A);
val = shiftOut(0x00, 0x6E);
Serial.print(", EFuse: ");
Serial.println(val, HEX);
Serial.println("Reading complete..");
}
void writeFuse(unsigned int fuse, byte val)
{
Serial.println("Writing correct fuse settings to ATtiny.......");
shiftOut(0x40, 0x4C);
shiftOut(val, 0x2C);
shiftOut(0x00, (byte)(fuse >> 8));
shiftOut(0x00, (byte)fuse);
Serial.println("Writing complete..");
}
unsigned int readSignature()
{
unsigned int sig = 0;
byte val;
for (int ii = 1; ii < 3; ii++)
{
shiftOut(0x08, 0x4C);
shiftOut(ii, 0x0C);
shiftOut(0x00, 0x68);
val = shiftOut(0x00, 0x6C);
sig = (sig << 8) + val;
}
return sig;
}
void setup()
{
pinMode(VCC, OUTPUT);
pinMode(RST, OUTPUT);
pinMode(SDI, OUTPUT);
pinMode(SII, OUTPUT);
pinMode(SCI, OUTPUT);
pinMode(SDO, OUTPUT); // Configured as input when in programming mode
digitalWrite(RST, HIGH); // Level shifter is inverting, this shuts off 12V
Serial.begin(9600);
Serial.println("Code is modified by Rik. Visit riktronics.wordpress.com and electronics-lab.com for more projects");
Serial.println("-------------------------------------------------------------------------------------------------");
Serial.println("Enter any character to start process..");
}
void loop()
{
if (Serial.available() > 0)
{
Serial.read();
pinMode(SDO, OUTPUT); // Set SDO to output
digitalWrite(SDI, LOW);
digitalWrite(SII, LOW);
digitalWrite(SDO, LOW);
digitalWrite(RST, HIGH); // 12v Off
digitalWrite(VCC, HIGH); // Vcc On
delayMicroseconds(20);
digitalWrite(RST, LOW); // 12v On
delayMicroseconds(10);
pinMode(SDO, INPUT); // Set SDO to input
delayMicroseconds(300);
unsigned int sig = readSignature();
Serial.println("Reading signature from connected ATtiny......");
Serial.println("Reading complete..");
Serial.print("Signature is: ");
Serial.println(sig, HEX);
readFuses();
if (sig == ATTINY13)
{
Serial.println("The ATtiny is detected as ATtiny13/ATtiny13A..");
Serial.print("LFUSE: ");
writeFuse(LFUSE, 0x6A);
Serial.print("HFUSE: ");
writeFuse(HFUSE, 0xFF);
Serial.println("");
}
else if (sig == ATTINY24 || sig == ATTINY44 || sig == ATTINY84 ||
sig == ATTINY25 || sig == ATTINY45 || sig == ATTINY85)
{
Serial.println("The ATtiny is detected as ");
if (sig == ATTINY24)
Serial.println("ATTINY24..");
else if (sig == ATTINY44)
Serial.println("ATTINY44..");
else if (sig == ATTINY84)
Serial.println("ATTINY84..");
else if (sig == ATTINY25)
Serial.println("ATTINY25..");
else if (sig == ATTINY45)
Serial.println("ATTINY45..");
else if (sig == ATTINY85)
Serial.println("ATTINY85..");
writeFuse(LFUSE, 0x62);
writeFuse(HFUSE, 0xDF);
writeFuse(EFUSE, 0xFF);
}
Serial.println("Fuses will be read again to check if it's changed successfully..");
readFuses();
digitalWrite(SCI, LOW);
digitalWrite(VCC, LOW); // Vcc Off
digitalWrite(RST, HIGH); // 12v Off
Serial.println("");
Serial.println("");
Serial.println("");
Serial.println("");
}
}