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15

You arrive to the point where the value of i is o. i >= 0 is true. You try to decrement with i--. Perhaps, you are expecting a negative number. But i is unsigned, so you get 255. It keep decrementing until you get to zero. Then everything repeats again. If i were signed, then the loop would make 9 iterations. The following code does not have this ill ...


10

Before reflashing any Atmel AVR MCU you need to erase it. Erase procedure by default clears FLASH, EEPROM and lock bits. There are 2 ways to solve your issue: Read EEPROM, erase all, program all including your backed-up EEPROM. Set EESAVE fuse bit. In this case EEPROM will not be erased during Erase procedure. But you will need to clear this flag some day ...


10

Found the solution, which is of course dead simple once you know... In Zadig, you can select the driver. Default selected is (in my case) the WinUSB driver. When I select the libusb driver, and install that driver, it works like a charm. Yeey. avrdude -vvv -c USBasp -p m32u4 -u -U flash:w:Duroduino.ino.hex:i avrdude: Version 6.3, compiled on Feb 17 2016 ...


9

Four problems You are using a resistor voltage divider to power your MCU. Bad. Bad bad. You need a proper regulator. Or a USB (IE 5v) power supply. Heck, use 3 AA batteries instead of a 9v if you don't have a regulator. The ATMega line can take what, 2.5 to 5v normal range? You have nothing that really depends on a full 5v, no clock sensitive/dependent code....


7

Assuming you already have a binary file for flashing, this page may help you. All you need to do is: Connect the Arduino with loaded ArduinoISP sketch to the target chip Run AVRDude. Make sure to specify a programmer type. Also note that ArduinoISP will work at lower serial speeds. Example: avrdude -p m328p -P /dev/ttyACM0 -c avrisp -b 19200 -U flash:w:...


7

No, it does not matter. There are several cases: The LED works: in this case the resistor will limit the current flow, and does not matter if it is before or after, since it is connected serial. The LED does not work: Electricity flows through the LED: it would go through the resistor anyway, either if it is before or after the LED. Electricity does not ...


6

The avrdude write command (-U) knows an 'immediate' mode (see the manual), which allows you to specify the bytes to be written directly. The syntax is like avrdude -U eeprom:w:0xff:m But this mode doesn't allow you to specify the address of the byte to be written, so I presume it will start writing at address zero. This works great for fuses (where ...


6

"i >= 0" is always true because i is unsigned.


5

The ATmega16A is a revision of the ATmega16. According to the AVRdude documentation, the part number for the ATmega16 is "m16" (but you can also use the full part name). Try atmega16 or m16 and leave off the "a".


5

Disabling the reset means game over for serial programming because it is used to enter ISP mode. ATmega without reset can be accessed only by a programmer which can do high-voltage parallel programming, such as the AVR Dragon. If that micro is soldered in a circuit, it is highly inconvenient method and usually not worth the effort.


5

when i burn it on the kit it doesn't work . what is the wrong with this code ?? Who knows? Could be anything. You haven't told us how you know it doesn't work. But that is not relevant, I will tell you why. I will not address your particular code in my answer more than this: It is too big. It seems to me that this is your first project tested on real ...


5

To light the LED, using the resistor to define the current, it doesn't matter which order they go in. There may be some other non-electrical reasons for preferring one over the other in specific circumstances. For instance, if you connect the LED directly to the PSU +ve, then accidentally shorting the LED to ground, as you might do with an untidy ...


4

The 328P has a weak internal pullup on the reset line, but it is recommended by the vendor to add an external pull-up if connecting any external reset circuit. In my experience, the MCU also needs to be powered externally. If you have any other SPI devices on the MOSI or MISO lines then make sure they are disconnected or in tri-state mode before programming. ...


4

It seems likely that you have inadvertently changes the fuses to one of: Disable /RESET Different clock speed or clock source Disable SPI programming To recover this you need to use a "high-voltage" programmer that involves holding /RESET at +12V whilst specific sequences of commands are sent through most of the other pins. This may be difficult with your "...


4

There seems to be a common problem with the Atmel ICE being very slow to program using avrdude. It's to do with the programmer seemingly defaulting to a low clock rate for programming. The problem can be resolved by instructing avrdude to run the programmer at a higher speed by adding -B1 to the command line arguments, for example: avrdude -c atmelice_isp -...


3

// switch led on PORTB &= 0x01; sleep(500); // switch led off PORTB &= 0x00; sleep(500); Not quite. Since your LED is tied low, you need to set the port bit high to turn it on. PORTB |= _BV(PB0); And you need to set it low to turn it off. PORTB &= ~_BV(PB0);


3

Unfortunately the AVRISP MkII cannot perform HV programming. The troubleshooting section of the AVRISP MkII manual (PDF page 27, or item 6 on the HTML version) states that, if it cannot detect the target it may be because: The SPI interface on the target is disabled because the SPI fuse is not programmed, and/or RSTDSBL or DWEN fuse is programmed. The ...


3

Your problem is that the programmer settings in your part entry (shown in your other question) override the programmer settings in the programmer entry. Just lose these lines in the part entries: mighty_opt8.upload.protocol=arduino


3

You can use AX Loader, an open source software available on Sourceforge.


3

Arduino's have a LED connected to pin 13 SCK (and have no problem) Yes they do , but take a look at a typical schematic of Arduino UNO (as an example) As you can see the SCK pin is connected to an OPAMP wired as a buffer which then drives the LED. The effect of that, is that the SCK pin only sees as a load the high input impedance of the OPAMP, so the pin ...


3

The error message you are seeing means that the chip is not responding to the "enable programming mode" command that the programmer is sending. Either you have got the connections wrong, or the programmer is sending the commands too quickly (programming frequency too high). New AVR chips come configured to use the chip's internal oscillator as a clock ...


3

Multiple USBasp or USBtinyISP devices can be identified by their connection information. From the AVRDUDE manual, appendix B, "Troubleshooting": Problem: Multiple USBasp or USBtinyISP programmers connected simultaneously are not found. Solution: The USBtinyISP code supports distinguishing multiple programmers based on their bus:device connection ...


3

I figured it out. Fuse changes don't erase the flash. The previous sketch started with setting the system clock prescaler to divide-by-8. The clock prescaler survives RESET. The fix was to temporarily tie RESET low. That way I had a chance to attach the programmer and power up without the prescaler setting taking place. I uploaded a new sketch without ...


3

I think the problem is that your port is /dev/ttyUSB0 and not /dev/ttyUSB0/


3

Looks OK to me. As I read here (https://github.com/micronucleus/micronucleus) 1) after having burned the bootloader you will have to use the upload tool that comes with the micronucleus bootloader to flash your programs (not avrdude) and 2) you will have to install drivers depending on your OS. I guess 2) is your problem right now.


3

You probably found a solution by now, but for others: in order to use an ATTiny85 with micronucleus via USB, you need a micronucleus driver installed, then you can use Arduino IDE if you want - simply add the "Additional Board Manager URL" http://digistump.com/package_digistump_index.json under Arduino IDE 1.6.5(or greater)'s Preferences and choose "...


3

As the name implies, a hex file contains its data encoded in hexadecimal. Specifically, in intel hex format. If you open the file in a text editor, you'll see it's a series of lines, each starting with a colon, some header data, and a fixed number of hex digits. Hexadecimal requires two characters to store one byte, so that doubles your filesize right away. ...


3

I'm a bit late to the game, but I just experienced the same error (albeit with different causes). on most places on the internet you will be instructed to install the libusbK driver, which doesn't work, use the libusb-win32 variant instead make sure the AVRDUDE.EXE tool is the latest version (the older doesn't work with the newer USB drivers for some reason)...


2

https://github.com/lmpipaon/ArduinoISP_slow_SCK.git ArduinoISP slow SCK It is a modification of the sketch Arduino ISP allowing lower frequency of SCK to program microcontrollers with slow clocks, eg using the watchdog clock divided by 8. When the programming mode begins ArduinoISP low frequency using the System Clock Prescaler. When the programing mode ...


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