Project Logs

Collapse

• So I've made myself an AVR resetter then

  davedarko • 07/16/2017 at 18:37 • 5 comments

  to fix almost all my tiny13a's I had to build this, but it definitely fixed all 10 boards :) for the tinies you don't need any parallel connections, so it's basically SPI + 12V on reset. I've hooked up a boost converter, added a button and "some" LEDs (bicolor), worked them in the code and now basically have a "power on and fix" stand alone fuse resetter for soic Attinies. That's not highly specialised at all. BUT IT WORKS AND THEY WORK! Now I need to clean up my desk.

  ---

  http://www.engbedded.com/fusecalc/
  https://arduinodiy.wordpress.com/2015/05/16/high-voltage-programmingunbricking-for-attiny/

  ---

  ---

  // 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/
  // slightly edited by davedarko in 2017
  
  #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  BUTTON   3    // Target VCC
  #define  LED_RED  7    // Target VCC
  #define  LED_GRN  5    // 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
  
  void setup() {
    pinMode(BUTTON, INPUT_PULLUP);
    pinMode(LED_GRN, OUTPUT);
    pinMode(LED_RED, OUTPUT);
    
    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);
  }
  
  void loop() {
    digitalWrite(LED_GRN, HIGH);
    digitalWrite(LED_RED, LOW);
    
    if (digitalRead(BUTTON) == LOW)
    {
      digitalWrite(LED_GRN, LOW);
      digitalWrite(LED_RED, HIGH);
      
      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.print("Signature is: ");
      Serial.println(sig, HEX);
      readFuses();
      if (sig == ATTINY13) {
        writeFuse(LFUSE, 0x6A);
        writeFuse(HFUSE, 0xFF);
      } else if (sig == ATTINY24 || sig == ATTINY44 || sig == ATTINY84 ||
                 sig == ATTINY25 || sig == ATTINY45 || sig == ATTINY85) {
        writeFuse(LFUSE, 0x62);
        writeFuse(HFUSE, 0xDF);
        writeFuse(EFUSE, 0xFF);
      }
      readFuses();
      digitalWrite(SCI, LOW);
      digitalWrite(VCC, LOW);    // Vcc Off
      digitalWrite(RST, HIGH);   // 12v Off
      delay(1000);
    }
  }
  
  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) {
    shiftOut(0x40, 0x4C);
    shiftOut( val, 0x2C);
    shiftOut(0x00, (byte) (fuse >> 8));
    shiftOut(0x00, (byte) fuse);
  }
  
  void readFuses () {
    byte val;
          shiftOut(0x04, 0x4C);  // LFuse
          shiftOut(0x00, 0x68);
    val = shiftOut(0x00, 0x6C);
    Serial.print("LFuse "); // this line may show up corrupted in some browsers it is a Serial.print("LFuse: ");
   Serial.print(val,...

  Read more »

• Attiny13 woes

  davedarko • 07/13/2017 at 20:01 • 0 comments

  Okay, here we go:

  Left OSHPark board: attiny13a SSU - working

  Right OSHPark board: attiny45 - working

  all 10 green boards: attiny13a SU - not working

  Red board: attiny13a SSU - not working (but same badge as left OP board - weird)

  USB cable tester: attiny13a SSU - working

  small OSHPark board: attiny13a SSU - no idea

  ---

  out of 15 attiny13a boards I know that two are working :( meh. At first I thought The smaller tinies are definitely fake, but the datasheet says they're a possibility.

  ---

View all 2 project logs