I couldn't get WS2182 led to work with attiny85, it was stuck solid white
To get WS2182 led to work with attiny85 i had to change tools/clock to 8MHZ then burn bootloader, then upload my sketch, then it worked
But i want to use attiny85 pin 1, the reset pin (pb5)
So i do the above, then use the HV programmer sketch to enable pin 1 as a gpio
But now my led is stuck solid white again, like it was until i did the burn bootloader fix
Has the HV programmer sketch below undone my 8MHZ burn bootloader?
// 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/
// To use pin 1 of Attiny as gpio
// 1. Upload your program to Attiny
// 2. Change below to writeFuse(HFUSE, 0xFE);
// 3. Upload this sketch to uno board, connect HV programmer and Attiny
// 4. Open serial monitor, enter any key, Reset pin will now be a gpio
// To return pin 1 to a reset pin
// 1. Change below to writeFuse(HFUSE, 0xFF);
// 3. Upload this sketch to uno board, connect HV programmer and Attiny
// 4. Open serial monitor, enter any key, Reset pin will now be a reset pin
#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 // not here!!
#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
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(19200);
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); // Disable Reset Pin = 0xFE, Enable Reset Pin = 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); // ResetDisable = 5F, Enable = DF **change here for tiny85**
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("");
}
}
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 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..");
}
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..");
}
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;
}
