hi
i'm trying to make a IR remote for my dslr using this library:
https://github.com/outofjungle/NikonRemote
it compiles and works fine on my arduino uno but when I compile it for attiny13 it returns "error compiling for board attiny13"
do you know what is causing the error?

I'm having problems with a code generator I'm trying to build on a attiny13a.
I designed code on an arduino UNO and tested, and it worked fine.
Since attempting to port to attiny, I have improved the code (and retested on uno) but still cannot get success on attiny13a.
I'm using an arduino as ISP and a TL886 programmer to program/read the attiny. I've tried multiple chips with identical results.

After lots of pulling my hair out I believe I've found whats going wrong. When I hit "burn bootloader" in arduino IDE (with settings 9.6mhz, 2.7v BOD, LTO enabled), fuses are burnt as follows:
Lfuse: 3A
Hfuse: FB
Lock: 3F
From the information I can find this is correct for 9.6mhz.

Next, without disconnecting anything or changing any settings, I select "upload using programmer". avrdude reports upload success. However with an oscilloscope I can see the program is not running correctly (the output of the "data" pin for my code generator is garbage).

Next, I remove the attiny IC (which is on a breadboard) and read it with my TL866. This confirms the fuses are set correctly (as above) for 9.6mhz.

Here is the strange part. If I now set the CKDIV8 bit (making lfuse 2A), and reburn the chip without changing anything else, the code runs fine (see oscilloscope trace). Although I now assume its running at 1.2Mhz, and this is why the output is slightly slow (the code is too fast for 1.2mhz? ).
I can achieve the same thing by burning bootloader with 1.2mhz selected, then changing to 9.6 and uploading.

I believe the problem is the code is being compiled for 1.2mhz when I upload it with arduino as ISP (even though 9.6 is selected in the menu).

I've attached a zip with my arduino sketch and the hex file arduino ide outputs when I select export compiled binary (with 9.6mhz selected), a word document showing everything arduino IDE shows when burning bootloader (at 9.6mhz) and compiling and uploading (again at 9.6mhz), a full binary read of the chip from my TL866 after it has been programmed, and an oscilloscope trace showing the output from the attiny afetr I have changed the fuse and set ckdiv8 (note its 12v and inverted to what the actual attiny output is because the 5v attiny pin is driving a transistor).

If this doesn't seem to happen to anyone else, could someone compile at 9.6mhz and send me a copy of the hex/bin so I can burn it to my chips to test if that works

FOUND PROBLEM.zip

Based on my small sample of ATtiny13a chips (a few DIP, a few SOIC-8), the typical clock frequency is consistently lower than the nominal 9.6Mhz. The datasheet figure 19-60 shows a typical frequency of ~9.5Mhz at 20-25C. My sample of chips average around 9.4Mhz@5V and [email protected].

I'm thinking of porting/testing my bit-bang assembler UART with MicroCore, but I don't want to do it if users are likely to run into timing problems due to incorrect assumptions about the typical oscillator frequency.

I'm getting this error while compiling on WIndows 10, Arduino 1.8.2 (store version).

First, thanks for your job of creating a good core for ATTINY13.

I don't see the problem. Win10Home IDE 1.8.2

void setup() {
  OSCCAL += 3; 
pinMode(3,INPUT);  
pinMode(0,OUTPUT);
pinMode(4,INPUT);  
pinMode(1,OUTPUT);
}

void loop() {

 if(pulseIn(3, HIGH,1000000)>1500){
  digitalWrite(0,HIGH);
 }
 else{
  digitalWrite(0,LOW);
 }
 
  if(pulseIn(4,HIGH,1000000)>1500){
  digitalWrite(1,HIGH);
 }
 else{
  digitalWrite(1,LOW);
 }
}

_Build options changed, rebuilding all
Archiving built core (caching) in: C:\Users\CAIOPO~1\AppData\Local\Temp\arduino_cache_94127\core\core_MicroCore_avr_attiny13_clock_9M6,BOD_4v3,flag_Os_flto_3f822feb56820af16374d894820ba573.a
C:\Users\CAIOPO~1\AppData\Local\Temp\ccol7Afh.ltrans0.ltrans.o: In function `pulseIn.constprop.0':

ccol7Afh.ltrans0.o:(.text+0x44): undefined reference to `micros'

ccol7Afh.ltrans0.o:(.text+0x52): undefined reference to `micros'

ccol7Afh.ltrans0.o:(.text+0x72): undefined reference to `micros'

ccol7Afh.ltrans0.o:(.text+0x92): undefined reference to `micros'

ccol7Afh.ltrans0.o:(.text+0xa0): undefined reference to `micros'

C:\Users\CAIOPO~1\AppData\Local\Temp\ccol7Afh.ltrans0.ltrans.o:ccol7Afh.ltrans0.o:(.text+0xba): more undefined references to `micros' follow

collect2.exe: error: ld returned 1 exit status

exit status 1
Error compiling for board ATtiny13.

just tried tone(4, 3520), and the generated frequency is way off. I measured ~2750Hz with my multimeter. I didn't hook up my scope, but the sound is distorted, like it is not a clean 50% duty cycle output.
With millis disabled the results were similar, with the measured frequency ~2800Hz. This is using the 9.6Mhz (~9.2 on my test chip) internal RC oscillator.

I am not exactly sure what is happening but there is an issue with the way micros() are calculated.

I am measuring width of PWM pulses sent by RC receiver. They are in the 1000-2000 us range, separated by about 16 ms. I don't need too high accuracy, and for most of the time lengths reported are good enough for my needs (requires some initial tinkering with OSCCAL, but it doesn't matter for the problem at hand). However, sometimes results of the measurements are longer than expected, and sometimes they are negative.

Here are examples of the numbers reported by my program running on the ATtiny13 with the MicroCore ("start" is a number reported by the first call to micros(), on the rising edge of the measure pulse, "end" is a number reported by the second call, on the falling edge, "pulse" is the pulse length calculated as a difference end-start):

a correct one:
start 521418632 end 521420214 pulse 1582

too long one (happened 5 times in 24k samples):
start 521436160 end 521439534 pulse 3374

negative one (happened 50 times in 24k samples):
start 526798027 end 526797824 pulse -203

You will find that in each case when the result is wrong one of the younger bytes of either end or start equals 0 (and I can tell you it is no accident, all wrong results share this). I feel like it is somehow related to the moment the micros() function is called. Looks like sometimes it happens that the TCNT0 equals zero but the timer0_overlflow is not yet incremented. That means the number returned is short by 7*256=1792 us.

Error while burning bootloader.
Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0x000000
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.

avrdude done. Thank you.

sketch\Blink_for_attiny13a.ino.cpp:1:21: fatal error: Arduino.h: No such file or directory

#include <Arduino.h
^

compilation terminated.

exit status 1
Error compiling for board ATtiny13.

ide version 1.8.4
i renamed the microcore as:
F:\arduino-1.8.4 IDE\hardware\ATtiny13\avr\cores\ATtiny13

Using:
Arduino IDE 1.8.2
MicroCore 1.0.2

Error message:

C:\Users\Pc\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\4.8.1-arduino5/bin/avr-gcc-ar: Cannot find plugin 'liblto_plugin-0.dll'

exit status 1
Error compiling for board ATtiny13.

I'm getting this error sorry - this program has been built without plugin support while trying to compile on Raspberry Pi 3, Arduino version 1.6.12.

Hi,Hans.
Thanks first for your great job!
Because flash size of Attiny13 ,I'v to disabled SAFEMODE and MILLIS on my project .
but , the code halted once run analogWrite(pin, 0 or 255).
Once enabled SAFEMODE , my sketch running very well.
below my test code.

int volt1;
void setup() {
  pinMode(0, OUTPUT);    
  pinMode(1, OUTPUT);   
  pinMode(4, INPUT_PULLUP);
  analogWrite(0, 0);   
  analogWrite(1, 0);
}
void loop() {
  if (digitalRead(4)) {               
    volt1 = map(analogRead(adc1), 0, 1023, 0, 255);      // motor speed controlled  by RP
    analogWrite(0, volt1);
    analogWrite(1, 255 - volt1);
    delay13(10);
  }
  else {
    analogWrite(0, 255);                  // Switch Motor to Run/Stop Mode.
    analogWrite(1, 0);
    delay13(250);
    analogWrite(0, 0);
    analogWrite(1, 255);
    delay13(250);
  }
}
void delay13(uint16_t mss)
{
  while(--mss)
  _delay_ms(1);
}

Wrong coding in wiring_analog.c
I fixed it this way, but there is probably a better way (I am newbie):
int16_t analogRead(uint8_t pin)
{
uint8_t l,h,p;
//FAULT ---> ADMUX = (ADMUX & _BV(REFS0)) | (pin & 0x03); // Setup ADC, preserve REFS0
if(pin == 5)p=0;
if(pin == 2)p=1;
if(pin == 4)p=2;
if(pin == 3)p=3;
ADMUX = (ADMUX & _BV(REFS0)) | (p & 0x03);
...

Now I could get it working on A2/PB4 as I first tried when it wouldn't work...

I'm trying to compile a simple blink example using Arduino 1.8.1 on Windows 10.

I get the following error:

`C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\mathi\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\mathi\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\mathi\Documents\Arduino\libraries -fqbn=MicroCore:avr:attiny13:clock=9M6,BOD=2v7,flag=Os_flto -ide-version=10801 -build-path C:\temp\arduino_build_923402 -warnings=none -prefs=build.warn_data_percentage=75 -verbose C:\Users\mathi\Documents\Arduino\blink\blink.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\mathi\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\mathi\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\mathi\Documents\Arduino\libraries -fqbn=MicroCore:avr:attiny13:clock=9M6,BOD=2v7,flag=Os_flto -ide-version=10801 -build-path C:\temp\arduino_build_923402 -warnings=none -prefs=build.warn_data_percentage=75 -verbose C:\Users\mathi\Documents\Arduino\blink\blink.ino
Using board 'attiny13' from platform in folder: C:\Users\mathi\AppData\Local\Arduino15\packages\MicroCore\hardware\avr\1.0.1
Using core 'microcore' from platform in folder: C:\Users\mathi\AppData\Local\Arduino15\packages\MicroCore\hardware\avr\1.0.1
Detecting libraries used...
"C:\Users\mathi\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\4.8.1-arduino5/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -w -x c++ -E -CC -mmcu=attiny13 -DF_CPU=9600000L -DARDUINO=10801 -DARDUINO_attiny -DARDUINO_ARCH_AVR -Wextra -flto "-IC:\Users\mathi\AppData\Local\Arduino15\packages\MicroCore\hardware\avr\1.0.1\cores\microcore" "C:\temp\arduino_build_923402\sketch\blink.ino.cpp" -o "nul"
Generating function prototypes...
"C:\Users\mathi\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\4.8.1-arduino5/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -w -x c++ -E -CC -mmcu=attiny13 -DF_CPU=9600000L -DARDUINO=10801 -DARDUINO_attiny -DARDUINO_ARCH_AVR -Wextra -flto "-IC:\Users\mathi\AppData\Local\Arduino15\packages\MicroCore\hardware\avr\1.0.1\cores\microcore" "C:\temp\arduino_build_923402\sketch\blink.ino.cpp" -o "C:\temp\arduino_build_923402\preproc\ctags_target_for_gcc_minus_e.cpp"
"C:\Program Files (x86)\Arduino\tools-builder\ctags\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\temp\arduino_build_923402\preproc\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\Users\mathi\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\4.8.1-arduino5/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -mmcu=attiny13 -DF_CPU=9600000L -DARDUINO=10801 -DARDUINO_attiny -DARDUINO_ARCH_AVR -Wextra -flto "-IC:\Users\mathi\AppData\Local\Arduino15\packages\MicroCore\hardware\avr\1.0.1\cores\microcore" "C:\temp\arduino_build_923402\sketch\blink.ino.cpp" -o "C:\temp\arduino_build_923402\sketch\blink.ino.cpp.o"
Compiling libraries...
Compiling core...
Using previously compiled file: C:\temp\arduino_build_923402\core\WInterrupts.c.o
Using previously compiled file: C:\temp\arduino_build_923402\core\wiring.c.o
Using previously compiled file: C:\temp\arduino_build_923402\core\wiring_analog.c.o
Using previously compiled file: C:\temp\arduino_build_923402\core\wiring_digital.c.o
Using previously compiled file: C:\temp\arduino_build_923402\core\wiring_pulse.c.o
Using previously compiled file: C:\temp\arduino_build_923402\core\wiring_pwm.c.o
Using previously compiled file: C:\temp\arduino_build_923402\core\wiring_shift.c.o
Using previously compiled file: C:\temp\arduino_build_923402\core\Print.cpp.o
Using previously compiled file: C:\temp\arduino_build_923402\core\WMath.cpp.o
Using previously compiled file: C:\temp\arduino_build_923402\core\WString.cpp.o
Using previously compiled file: C:\temp\arduino_build_923402\core\main.cpp.o
"C:\Users\mathi\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\4.8.1-arduino5/bin/avr-gcc-ar" rcs "C:\temp\arduino_build_923402\core\core.a" "C:\temp\arduino_build_923402\core\WInterrupts.c.o"
C:\Users\mathi\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\4.8.1-arduino5/bin/avr-gcc-ar: Cannot find plugin 'liblto_plugin-0.dll'

exit status 1
Error compiling for board ATtiny13.`

When I select USBasp (slow), and upload, avrdude fails because the upload protocol variable is not set:
C:\Program Files (x86)\arduino-1.8.5\hardware\tools\avr/bin/avrdude -CC:\Users\parsons\AppData\Local\Arduino15\packages\MicroCore\hardware\avr\1.0.3/avrdude.conf -v -pattiny13 -c{upload.protocol} -Pusb -B32 -Uhfuse:w:0xff:m -Ulfuse:w:0x3A:m -Uflash:w:C:\Users\parsons\AppData\Local\Temp\arduino_build_559788/1638lite.ino.hex:i

I was testing this sketch on my ATtiny to see if I could confirm the mode works, but annoyingly the interrupt didn't even seem to be firing, which was confounding since I had it at least firing before changing this code. I tried reordering the interrupt attach sequence and a few other things but it just did nothing. It occurred to me though that one thing that had changed was that I disabled millis. Sure enough when I re-enabled them the led turned off and back on when I pressed the button just as expected. Any ideas what the hell is going on here?

/* 
 * This sketch uses the ATtiny13 MicroCore by MCUdude
 * See https://github.com/MCUdude/MicroCore
 * To compile, ENABLE_MILLIS must be commented out in
 * core_settings.h. They can be re-enabled once
 * the code has been compiled.
 */
#include <avr/sleep.h>

#define DISP_PIN 3
#define DATA_PIN 0
#define CLK_PIN 2

#define DISP_TIME 4000 // Max = 4080
#define NUM_LOOPS 20
#define LOOP_TIME 1000 / NUM_LOOPS

volatile word onTime = 0;
volatile byte mode = 0;

void setup() {
  wdt_disable();
  analogReference(INTERNAL);
  pinMode(DATA_PIN, OUTPUT);
  pinMode(CLK_PIN, OUTPUT);
  pinMode(DISP_PIN, OUTPUT);
  digitalWrite(DISP_PIN, HIGH);
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  sleep_enable();
  attachInterrupt(0, tempIsr, LOW);
  sleep_cpu();
}

void loop() {
  switch(mode) {
    case 1:
      digitalWrite(DISP_PIN, LOW);
      for(int i = 0; i < NUM_LOOPS; i++) {
        displayValue(0, false, false);
        delay(LOOP_TIME);
      }
      displayValue(0, false, false);
      waitMode();
      break;
    case 3:
      displayValue(0, false, false);
      waitMode();
      break;
    case 5:
      displayValue(0, false, false);
      waitMode();
      break;
    case 7:
      displayValue(0, false, false);
      waitMode();
      break;
    case 9:
      sleepMode();
      break;
    default:
      displayValue(0, false, false);
      if(onTime >= DISP_TIME) {
        sleepMode();
      }
      delay(1);
      onTime++;
      break;
  }
}

void tempIsr() {
  sleep_disable();
  detachInterrupt(0);
  mode++;
}

void displayValue(char value, boolean dec1, boolean dec2) {
  shiftOut(DATA_PIN, CLK_PIN, LSBFIRST, mode);
}

void waitMode() {
  mode++;
  onTime = 0;
  delay(1000);
  attachInterrupt(0, tempIsr, LOW);
}

void sleepMode() {
  mode = 0;
  digitalWrite(DISP_PIN, HIGH);
  delay(1000);
  sleep_enable();
  attachInterrupt(0, tempIsr, LOW);
  sleep_cpu();
}

Yep, that right.

The micros() function is one of the few functions in this core that's been (heavily) modified by me yet. So what's so terrible about it you ask?

• It occupies 8% of the flash memory (84 bytes)
• It's causing an interrupt every 256 clock cycle, which ruins accurate timing with delay() and _delay_ms()

I know @SpenceKonde have some similar implementations over at ATTinyCore. Is it even possible to implement a fairly accurate micros() function without wasting lots of resources?

I want to use the pin change interrupt rather than the INT0 single pin interrupt. Would it be acceptable to you if I added such new functions, possibly as an option like pwm/adc?

There have been reported on the Arduino forum that the delayMicroseconds doesn't work/freezes the microcontroller if the argument is more than 199. The issue is the uS_new() function, which is some of the leftovers from core13. I'm no assembly guy, so maybe it should be based on _delay_us() from avr_libc instead?

So I've been working with optimizing the functions used in MicroCore. One of the goals was to redo the pulseIn function, as it relies on micros to work. I think I've created a good replacement for the pulseIn function, but LTO has to be enabled in order for the timing to be right. LTO also reduces the size of the function dramatically.

This core has the option to disable LTO (which is enabled by default). I'd like to take the output from the compiler (with LTO enabled) and make an inline assembly function out of it, so that the timing can be guarateed no matter what compiler flag is used. We're also working multiple clock frequencies, so this also have to be taken into account.

I have very little (no) experience with assembly, so any help would be appreciated. @nerdralph is it possible to use the output below to re-create the pulseIn function in assembly that isn't hard coded to a particular F_CPU?

int main(void)
{
  pulseInNew(1, HIGH, UINT32_MAX);
}

uint32_t pulseInNew(uint8_t pin, uint8_t state, uint32_t timeout) 
{  
  uint32_t width = 0; // Keep initialization out of time critical area
  
  // Convert the timeout from microseconds to a number of times through
  // the initial loop; it takes 16 clock cycles per iteration.
  uint32_t numloops = 0;
  uint32_t maxloops = microsecondsToClockCycles(timeout) >> 4; // Divide by 16

  // Wait for any previous pulse to end
  while (!!(PINB & _BV(pin)) == state)
  {
    if(numloops++ == maxloops) {return 0;}
    asm("nop \n");  
    asm("nop \n");
  }
  // Wait for the pulse to start
  while (!!(PINB & _BV(pin)) != state)
  {
    if(numloops++ == maxloops) {return 0;}
    asm("nop \n");  
    asm("nop \n");
    asm("nop \n");
  }
  // Wait for the pulse to stop This loop is 16 instructions long
  while (!!(PINB & _BV(pin)) == state)
  {
    if(numloops++ == maxloops) {return 0;}           
    width++;
    asm("nop \n");  
    asm("nop \n");  
    asm("nop \n"); 
  }

  // Convert the reading to microseconds. 
  return clockCyclesToMicroseconds(width << 4); // Same as multiplying by 16
}

$ avr-objdump -S pulseIn_t13_test.ino.elf

pulseIn_t13_test.ino.elf:     file format elf32-avr


Disassembly of section .text:

00000000 <__vectors>:
   0:	09 c0       	rjmp	.+18     	; 0x14 <__ctors_end>
   2:	0e c0       	rjmp	.+28     	; 0x20 <__bad_interrupt>
   4:	0d c0       	rjmp	.+26     	; 0x20 <__bad_interrupt>
   6:	0c c0       	rjmp	.+24     	; 0x20 <__bad_interrupt>
   8:	0b c0       	rjmp	.+22     	; 0x20 <__bad_interrupt>
   a:	0a c0       	rjmp	.+20     	; 0x20 <__bad_interrupt>
   c:	09 c0       	rjmp	.+18     	; 0x20 <__bad_interrupt>
   e:	08 c0       	rjmp	.+16     	; 0x20 <__bad_interrupt>
  10:	07 c0       	rjmp	.+14     	; 0x20 <__bad_interrupt>
  12:	06 c0       	rjmp	.+12     	; 0x20 <__bad_interrupt>

00000014 <__ctors_end>:
  14:	11 24       	eor	r1, r1
  16:	1f be       	out	0x3f, r1	; 63
  18:	cf e9       	ldi	r28, 0x9F	; 159
  1a:	cd bf       	out	0x3d, r28	; 61
  1c:	02 d0       	rcall	.+4      	; 0x22 <main>
  1e:	35 c0       	rjmp	.+106    	; 0x8a <_exit>

00000020 <__bad_interrupt>:
  20:	ef cf       	rjmp	.-34     	; 0x0 <__vectors>

00000022 <main>:
  22:	80 e0       	ldi	r24, 0x00	; 0
  24:	90 e0       	ldi	r25, 0x00	; 0
  26:	dc 01       	movw	r26, r24
  28:	b1 9b       	sbis	0x16, 1	; 22
  2a:	1a c0       	rjmp	.+52     	; 0x60 <__SREG__+0x21>
  2c:	01 96       	adiw	r24, 0x01	; 1
  2e:	a1 1d       	adc	r26, r1
  30:	b1 1d       	adc	r27, r1
  32:	83 39       	cpi	r24, 0x93	; 147
  34:	28 e1       	ldi	r18, 0x18	; 24
  36:	92 07       	cpc	r25, r18
  38:	24 e0       	ldi	r18, 0x04	; 4
  3a:	a2 07       	cpc	r26, r18
  3c:	b1 05       	cpc	r27, r1
  3e:	11 f1       	breq	.+68     	; 0x84 <__SREG__+0x45>
  40:	00 00       	nop
  42:	00 00       	nop
  44:	f1 cf       	rjmp	.-30     	; 0x28 <main+0x6>
  46:	01 96       	adiw	r24, 0x01	; 1
  48:	a1 1d       	adc	r26, r1
  4a:	b1 1d       	adc	r27, r1
  4c:	83 39       	cpi	r24, 0x93	; 147
  4e:	28 e1       	ldi	r18, 0x18	; 24
  50:	92 07       	cpc	r25, r18
  52:	24 e0       	ldi	r18, 0x04	; 4
  54:	a2 07       	cpc	r26, r18
  56:	b1 05       	cpc	r27, r1
  58:	a9 f0       	breq	.+42     	; 0x84 <__SREG__+0x45>
  5a:	00 00       	nop
  5c:	00 00       	nop
  5e:	00 00       	nop
  60:	b1 9b       	sbis	0x16, 1	; 22
  62:	f1 cf       	rjmp	.-30     	; 0x46 <__SREG__+0x7>
  64:	0d c0       	rjmp	.+26     	; 0x80 <__SREG__+0x41>
  66:	01 96       	adiw	r24, 0x01	; 1
  68:	a1 1d       	adc	r26, r1
  6a:	b1 1d       	adc	r27, r1
  6c:	83 39       	cpi	r24, 0x93	; 147
  6e:	28 e1       	ldi	r18, 0x18	; 24
  70:	92 07       	cpc	r25, r18
  72:	24 e0       	ldi	r18, 0x04	; 4
  74:	a2 07       	cpc	r26, r18
  76:	b1 05       	cpc	r27, r1
  78:	29 f0       	breq	.+10     	; 0x84 <__SREG__+0x45>
  7a:	00 00       	nop
  7c:	00 00       	nop
  7e:	00 00       	nop
  80:	b1 99       	sbic	0x16, 1	; 22
  82:	f1 cf       	rjmp	.-30     	; 0x66 <__SREG__+0x27>
  84:	80 e0       	ldi	r24, 0x00	; 0
  86:	90 e0       	ldi	r25, 0x00	; 0
  88:	08 95       	ret

0000008a <_exit>:
  8a:	f8 94       	cli

0000008c <__stop_program>:
  8c:	ff cf       	rjmp	.-2      	; 0x8c <__stop_program>

Hi there! 👋

First of all I want to say thank you for you work, really useful and easy to move my solution from prototype to production without rewrite the code (or use other for prototyping, not Arduino). For home projects it's more then useful. 🙇

My question is about I took a fast trip in your code, and look like there is no serious problem around use your solution to AtTiny25/45/85 models too. As you said in the Readme, these 8 legs AVRs are really similar. What do you think about it? I know the solution named ATTinyCore, but looks like compile much more bigger hex, maybe I missed a flag somewhere?

For an example solution,

• with MicroCore (LTO Enabled):
  Sketch uses 946 bytes (92%) of program storage space. Maximum is 1024 bytes.
• with ATTinyCore for AtTiny25 (LTO Enabled):
  Sketch uses 1500 bytes (73%) of program storage space. Maximum is 2048 bytes.

Thank you for you support!

Hi,
the line 79 of wiring.c should define parameters for 12MHz,
but the value is 1.2MHz!
line 79: #elif F_CPU == 1200000L

I think this is a bug.
best regards,
Jost

It wasn't as bad as shiftOut, but still fell short of ideal. Here's my improved version (faster and smaller compiled size):

  uint8_t value = 0;
  uint8_t i = 8;
  const uint8_t clkpinMask = _BV(clockPin);
  do
  {
    PINB = clkpinMask; // Toggle clock pin
    if (PINB & 1<<dataPin){ 
      if(bitOrder == MSBFIRST) value |= 0x01;
      else value |= 0x80;
    }
    PINB = clkpinMask; // Toggle clock pin
    if(bitOrder == MSBFIRST) 
      value <<= 1;
    else 
      value >>= 1;
  }
  while(--i);

In addition to reviewing the disassembled compiler output, I tested it with a TM1638 LED&KEY module.

In file included from /root/Arduino/libraries/FastLED/FastLED.h:51:0,
                 from /root/Arduino/RGB-HUE-RR/RGB-HUE-RR.ino:5:
/root/Arduino/libraries/FastLED/fastpin.h: In instantiation of 'class FastPin<1u>':
/root/Arduino/libraries/FastLED/platforms/avr/clockless_trinket.h:96:49:   required from 'class ClocklessController<1u, 3, 3, 6, (EOrder)10u, 0, false, 10>'
/root/Arduino/libraries/FastLED/chipsets.h:460:7:   required from 'class WS2811Controller800Khz<1u, (EOrder)10u>'
/root/Arduino/libraries/FastLED/FastLED.h:111:52:   required from 'class WS2811<1u, (EOrder)10u>'
/root/Arduino/libraries/FastLED/FastLED.h:304:33:   required from 'static CLEDController& CFastLED::addLeds(CRGB*, int, int) [with CHIPSET = WS2811; unsigned char DATA_PIN = 1u]'
/root/Arduino/RGB-HUE-RR/RGB-HUE-RR.ino:13:43:   required from here
/root/Arduino/libraries/FastLED/fastpin.h:207:2: error: static assertion failed: Invalid pin specified
  static_assert(validpin(), "Invalid pin specified");
  ^
exit status 1
Error compiling for board ATtiny13.

Code (it works with arduino atmega and Attiny85 ATTinyCore

// this is temporary workaround for ATTinyCore
extern "C" {
  volatile unsigned long timer0_millis = 0; // FAKE FAKE FAKE!
}

#include<FastLED.h>
#define NUM_LEDS 8

CRGBArray<NUM_LEDS> leds;

static uint8_t hue[NUM_LEDS];

void setup(){
  FastLED.addLeds<WS2811,1>(leds, NUM_LEDS);

  for(int i = 0; i < NUM_LEDS; i++){
    hue[i] = i;
  }
}

void loop(){ 
  for(int i = 0; i < NUM_LEDS; i++){   
    leds[i] = CHSV(hue[i],255,255);
    FastLED.delay(0);
    hue[i] ++;
  }
}

Hello! Please add the attachInterrupt(interrupt, function, mode) example. I tried many options, but I did not succeed with external interrupts with Attiny13. Thank you.

Im using exacly this settings

on Arduino IDE 1.8.2

and in the end while trying to program the attiny13 im getting this error message.

avrdude: Can't find programmer id "{upload.protocol}"

in commandline i noticed the IDE did not replace the -c{upload.protocol} with a variable.

I installed microcore via the boardsmanager but for the life of me i cant find the installed files, particularly the coresettings file.

The obvioisplace to go would be /{sketchbookfolder}/hardware but i only find my attiny254585 cores there. Where is the Microcore?

Hi,
I want to build Nikon IR remote based on Attiny13A. Using your core it was easy to create basic working project.
I want to power my device via battery, so I decided to put Attiny into sleep and interrupt from button, then send code and put into sleep again.
Unfortunetelly when I put Attiny into sleep it draw too much power and interrupt does not work.
But when I uploaded my sketch using smeezekitty's core sleep and interrupt worked perfectly, but not the actual IR code function.
I'm new to programming mcu's, do you have any advices why I might have such problems?

This is my sleep function:
void sleep() { GIMSK |= _BV(PCIE); // Enable Pin Change Interrupts PCMSK |= _BV(PCINT3); // Use PB3 as interrupt pin set_sleep_mode(SLEEP_MODE_PWR_DOWN); cli(); sleep_enable(); // Sets the Sleep Enable bit in the MCUCR Register (SE BIT) sei(); // Enable interrupts sleep_cpu(); // sleep cli(); // Disable interrupts PCMSK &= ~_BV(PCINT3); // Turn off PB3 as interrupt pin sleep_disable(); // Clear SE bit }

Setup:
void setup() { pinMode(IRledPin, OUTPUT); PORTB |= _BV(PB3); //pull-up ACSR |= _BV(ACD); // Disable analog comparator ADCSRA &= ~(1<<ADEN); // Disable ADC }

Loop:
void loop() { sleep(); SendNikonCode(); }

Hi!
I am working on my own project which is called Cing (https://github.com/Galeje/Cing) and i wanted to use your library but i want to change one thing and that is name in arduino board bar(picture).
image.I know how to do it but i need your permison to do that.Can i do that?It will be so user of cing can better orient in boards because cing is a robot for beginers.

Thanks for respond.
Best regards Stanley member of GalejeNextGen team.

It's almost ready for a new release, but before we do that I want to give the user the ability to use timer0 with millis(). This will most likely load the CPU more that the WDT interrupts, but on the other side millis will be much more accurate. My thought is that the user may select WDT or timer0 in the core_settings.h file.

Help is always welcome, so feel free to join 🙂

I am new with Arduino programming, mainly with ATtiny13, but am trying to use WDT as interrupt together with sleep in order to save power in a battery-based timer. The compiler in IDE 1.6.11 gives the error:

...
Compiling core...
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\WInterrupts.c.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring.c.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_analog.c.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_digital.c.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_pulse.c.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_pwm.c.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_shift.c.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\Print.cpp.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\WMath.cpp.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\WString.cpp.o
Usando arquivo compilado anteriormente: C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\main.cpp.o
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\WInterrupts.c.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring.c.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_analog.c.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_digital.c.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_pulse.c.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_pwm.c.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\wiring_shift.c.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\Print.cpp.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\WMath.cpp.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\WString.cpp.o"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs  "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\core.a" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\core\main.cpp.o"
Linking everything together...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc" -w -Os -Wl,--gc-sections -mmcu=attiny13 -w -flto -o "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp/Timer_NO_Contact_Light_Configuravel_10msON_Power_Down.ino.elf" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\sketch\Timer_NO_Contact_Light_Configuravel_10msON_Power_Down.ino.cpp.o" "C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp/core\core.a" "-LC:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp" -lm
wiring.c.o (symbol from plugin): In function `__vector_8':

(.text+0x0): multiple definition of `__vector_8'

C:\Users\Angelo\AppData\Local\Temp\build47f663238a2af287589b5a7c919d7973.tmp\sketch\Timer_NO_Contact_Light_Configuravel_10msON_Power_Down.ino.cpp.o (symbol from plugin):(.text+0x0): first defined here

collect2.exe: error: ld returned 1 exit status

exit status 1
Erro compilando para a placa ATtiny13
================================

If I change the ISR vector name WDT_vect (highlighted in edition = reserved label ) to other name say WATCHDOG (non-highlighted in edition = ordinary label) the error disappears.
Any clue why this is happening?
Thanks.

I would like to try the UART on ATtiny13, then I got this error. What is going on ?

Thanks!

Accurate timing is not implemented yet. The delay() function is based on the AVR _delay_ms() function, and is highly inaccurate. The millis() function is also inaccurate, and one millisecond is actually (with a 9.6 MHz clock) (9600000/256)/37 = 1013.51 ms. the 13.5 ms should be taken into the count. I'm really grateful if someone will help me out with this! Have you any experience with these weird clock frequencies @SpenceKonde?

It's important that the new code is as small and optimized as possible. When given only 1024 bytes, every byte counts!

When selection 128 kHz AVRdude (via the IDE) does not recognize the slow programmers
I use IDE version 1.8.2 and the latest MicroCore via JSON (under "Preferences")
Works fine at 600kHz but somehow the slow programmers don't work, no matter which one of them I select in the IDE
This is the error thrown by AVRdude in verbose output

avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

     System wide configuration file is "C:\Users\kirchnet\AppData\Local\Arduino15\packages\MicroCore\hardware\avr\1.0.2/avrdude.conf"

avrdude: Can't find programmer id "{upload.protocol}"

Hi, using basic blink program I can use only pin 0 (PB0). Others pins does not work.
Also, when I try to use different pin, pin 0 still BLINKS but with lover voltage on the output. This issue makes MicroCore totally useless to me.

According to the attiny13/13a manual section 4.3.1, the I bit in SREG is clear after reset. Therefore the cli() in init() can be removed:
https://github.com/MCUdude/MicroCore/blob/master/avr/cores/microcore/wiring.c#L172

Also, from what I can tell from the manual, it is not necessary to reset the watchdog timer before enabling the watchdog interrupt.

Removing those two lines saves 4 bytes.

The boards manager URL makes it easier to install the core in Arduino IDE and in the Arduino Eclipse plugin. The core isn't ready for a v1.0.0 release yet, but we're getting closer. I know you're a busy man @per1234, but would you like to help me out with the boards manager URL on this core too? I promise this will be the last one 😉

I looked at the shiftOut code, and it is pretty bad. When clockPin, dataPin, and bitOrder are known at compile time, codesize is 22 instructions, and it takes a minimum of 21 cycles per bit. A few years ago I explained in my blog why the default Arduino shiftOut code sucks:
http://nerdralph.blogspot.ca/2015/03/fastest-avr-software-spi-in-west.html

I modified my fast SPI C code to work with MicroCore:

#define SPIPORT PORTB
#define SPIPIN PINB

void spiNew(byte datapin, byte clockpin, byte mode, byte value){
  const byte mosipinmask = (1<<datapin);
  const byte clkpinmask = (1<<clockpin);
  byte i = 8;
  byte portbits = (SPIPORT & ~(mosipinmask | clkpinmask) );
  do{
    SPIPORT = portbits;      // clk and data low
    if ( mode == MSBFIRST){
      if(value & 0x80) SPIPIN = mosipinmask;
    }
    else{
      if(value & 0x01) SPIPIN = mosipinmask;
    }
    SPIPIN = clkpinmask;     // toggle clk
    if ( mode == MSBFIRST) value <<= 1;
    else value >>= 1;
  } while(--i);
  return;
}

My version compiles to 13 instructions, and takes 8 cycles per bit.
I can do a pull request, or you can copy/modify to your liking.

Hi,

I am very appreciated about you awesome work! I have been using Core13 but it is too simple in its supported functions.

However, there is a problem when I try to upload the Bootloader, it says "ser_open(): can't open device "unknown"", and the uploading fails. How can I fix this?

Thank you.

Any idea why this code does not work with micro core even though it compiles?
https://forum.arduino.cc/index.php?topic=483961.0

unsigned long previousMillis = 0;
#define interval 1000
/////////////////////////////////////////////////////////
void Blink();

void setup() {
  OSCCAL += 3;
  pinMode(3, INPUT);
  pinMode(0, OUTPUT);
  pinMode(4, INPUT);
  pinMode(1, OUTPUT);
}
/////////////////////////////////////////////////////////
void loop() {

  if (pulseIn(3, HIGH, 1000000) > 1500) {
    digitalWrite(0, HIGH);
  }
  else {
    digitalWrite(0, LOW);
  }

  if (pulseIn(4, HIGH, 1000000) > 1500) {
    Blink();
  }
  else {
    digitalWrite(1, LOW);
  }
}
//////////////////////////////////////////////////////////
void Blink() {

  if (millis() - previousMillis >= interval) {
    digitalWrite(1, HIGH);
    delay(70);
    digitalWrite(1, LOW);
    delay(200);
    digitalWrite(1, HIGH);
    delay(70);
    digitalWrite(1, LOW);
    previousMillis = millis();
  }
}

The ATTiny13A has a few registers that the ATTiny13 does not (BODSE is the one at issue here, or one of them at least). These defines are not available if you tell the compiler that it's building for a '13 instead of a '13a (the defines are present in avr\iotn13a.h, just not avr\iotn13.h).

See http://forum.arduino.cc/index.php?topic=449324.0 for the issue that prompted this.

An option to choose which micro is being used is needed, I think.

I think it may be a good idea to add Travis CI to MicroCore. Would you like to help me out @per1234?
MicroCore and MajorCore are the only "Arduino cores" left without CI 🙂

I'm using a lib which utilizes digitalPinToBitMask. I once programmed an Attiny13 that used a lib (and it's working still) using this operation. Now I wanted to update it and tried compiling with this MicroCore. But obviously the operation is not implemented here. Is there any way to get this to work? Or am I forced to google/voodoo whatever I did once I got my code working?

Although I rarely use Arduino/Wiring, I decided to take a quick look at how much code could be saved in the millis ISR. The current version in C takes 72 bytes. After a couple itterations I got it down to 36 bytes in assembler:

#define tmp1 r16
.global WDT_vect
WDT_vect:
    push ZL
    in ZL, SREG
    push ZL                             ; save SREG
    push ZH
    push tmp1
    ldi ZL, lo8(wdt_interrupt_counter)  ; must be 8-byte aligned
    sub ZH, ZH                          ; also clears carry
add:
    ld tmp1, Z
    sbci tmp1, -1
    st Z+, tmp1
    andi ZL, 0x04
    breq add
    pop tmp1
    pop ZH
    pop ZL
    out SREG, ZL
    pop ZL
    reti

This is untested prototype code. It requires the 4-byte counter to be 8-byte aligned; that can be guaranteed with a pragma. Without the 8-byte alignment trick, the smallest version I could come up with was 42 bytes.

Sorry if there's something obvious I've missed here. I was wondering if there is a way to change core options for an individual sketch rather than the entire core, in particularly disabling millis since, even though i don't need it for this project it will be annoying to turn back on if I need it in the future. I tried putting #undef ENABLE_MILLIS at the top of the sketch and making a copy of core_settings.h in the sketch folder, but that did nothing, sadly. Any ideas?

I have successfully burned bootloader but can't compile simple blink example:

sorry - this program has been built without plugin support
exit status 1
Error compiling for board ATtiny13.

#define LED_BUILTIN 1

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  delay(200);
  digitalWrite(LED_BUILTIN, LOW);
  delay(100);
}

It would be fantastic to organize this lib as downloadable platform for PlatformIO

The introduction of the platform.txt gave us lots of under the hood settings to play with. Sadly the documentation isn't the best..

I was thinking about implementing an additional flag in the boards.txt file; {programmer.speed}.
If a slow internal clock is selected like 128 kHz, the programmer.speed flag will hold "-B32". if the speed is 9.6 MHz it will hold "-B1". By doing this I can get rid of the "slow programmers" found in the programmers.txt file. Sounds great?

Of course this doesn't go without problems. When the user is uploading the code, the IDE generates an avrdude command before executing it. I discovered there was a typo in the boards.txt file, so the IDE was using it's own copy of avrdude.conf and platform.txt rules when uploading code. I did some changes to fix this, but I can't figure out how the IDE will get the programmers name right. Look at this error generated by avrdude:

/Users/Hans/Library/Arduino15/packages/arduino/tools/avrdude/6.0.1-arduino5/bin/avrdude -C/Users/Hans/Documents/Arduino/hardware/MicroCore/avr/avrdude.conf -v -pattiny13 -c{protocol} -B1 -Uhfuse:w:0xfb:m -Ulfuse:w:0x3A:m -D -Uflash:w:/var/folders/_p/s3kykxss20bbhfmqcg0ctrp80000gn/T/buildfbb3364bdd983a856e968c32e574d2fe.tmp/Blink.ino.hex:i

As you can see it's not able to figure out what protocol it's using (in my case it's the usbtiny), but when burning the fuses, it's able to figure it out. Here's a copy of the current platform.txt avrdude commands settings:

tools.avrdude.upload.params.verbose=-v
tools.avrdude.upload.params.quiet=-q -q
tools.avrdude.upload.pattern="{cmd.path}" "-C{config.path}" {upload.verbose} -p{build.mcu} -c{protocol} {programmer.speed}  -Uhfuse:w:{bootloader.high_fuses}:m -Ulfuse:w:{bootloader.low_fuses}:m -D "-Uflash:w:{build.path}/{build.project_name}.hex:i"

tools.avrdude.program.params.verbose=-v
tools.avrdude.program.params.quiet=-q -q
tools.avrdude.program.pattern="{cmd.path}" "-C{config.path}" {program.verbose} -p{build.mcu} -c{protocol} {programmer.speed} {program.extra_params}  -Uhfuse:w:{bootloader.high_fuses}:m -Ulfuse:w:{bootloader.low_fuses}:m "-Uflash:w:{build.path}/{build.project_name}.hex:i"

tools.avrdude.erase.params.verbose=-v
tools.avrdude.erase.params.quiet=-q -q
tools.avrdude.erase.pattern="{cmd.path}" "-C{config.path}" -v -p{build.mcu} -c{protocol} -B32 {program.extra_params} -e -Uhfuse:w:{bootloader.high_fuses}:m -Ulfuse:w:{bootloader.low_fuses}:m

tools.avrdude.bootloader.params.verbose=-v
tools.avrdude.bootloader.params.quiet=-q -q
tools.avrdude.bootloader.pattern="{cmd.path}" "-C{config.path}" {bootloader.verbose} -p{build.mcu} -c{protocol} -B32

How can this be solved without having to use the "upload.protocol" from boards.txt? Do you have an idea @per1234?

hi
apparently I can't use the SPI library of arduino when I select attiny13 as my board...do you know why?
and is there a way to fix this?

Hi there,

I'm trying to burn the Bootloader at default frequency 9.6 MHz over Arduino as ISP, but at the end I got an error saying:

avrdude: ser_open(): can't open device "unknown": The system cannot find the file specified.

The sketch uploading through "Upload Using Programming" just working fine.

Arduino IDE 1.8.2 with MicroCore 1.0.3

Regards

Hi I try to program Atmega13a to enable deep sleep mode every few seconds like in the article:
http://homecircuits.eu/blog/low-power-picopower-attiny13a/

So the code is:

#include <avr/interrupt.h>
#include <avr/sleep.h>
// Pin 4 for LED
int led = 4;

ISR(WDT_vect) {
  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);               // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
  sleep_mode();
}

void setup() {
  // initialize the digital pin as an output.
  pinMode(led, OUTPUT);
  // prescale timer to 8s so we can measure current
  WDTCR |= (1<<WDP3 )|(0<<WDP2 )|(0<<WDP1)|(1<<WDP0); // 8s
  // Enable watchdog timer interrupts
  WDTCR |= (1<<WDTIE);
  sei(); // Enable global interrupts
  // Use the Power Down sleep mode
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  for (;;) {
    sleep_mode();   // go to sleep and wait for interrupt...
  }
}
// the loop routine runs over and over again forever:
void loop() {
}

And compile error is:

....
Compiling libraries...
Compiling core...
Using precompiled core
Linking everything together...
/home/.../arduino-1.8.5/hardware/tools/avr/bin/avr-gcc" -w -Os -Wl,--gc-sections -mmcu=attiny13a -w -flto -o "/tmp/arduino_build_638757/Blink.ino.elf" "/tmp/arduino_build_638757/sketch/Blink.ino.cpp.o" "/tmp/arduino_build_638757/../arduino_cache_789397/core/core_MicroCore_avr_attiny13_clock_128k,BOD_2v7,flag_Os_flto_ceceed073e2d2fa20c28f2cdd89dc065.a" "-L/tmp/arduino_build_638757" -lm
wiring.c.o (symbol from plugin): In function `__vector_8':
(.text+0x0): multiple definition of `__vector_8'
/tmp/arduino_build_638757/sketch/Blink.ino.cpp.o (symbol from plugin):(.text+0x0): first defined here
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board ATtiny13.