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The bit about setting the hfuse bit so that code will execute solved my problem! Thanks again. Below the copy/pasted comments from my old website. If it doesn't show the correct fuse value, you either incorrectly edited the boards.txt file or you edited the wrong file. You'll see them in avrdude command output. Please enable the verbose mode (enable the checkboxes in the Preferences dialog for compiling and uploading) in Arduino, and check again the fuse settings applied correctly. I keep receiving comments describing the situation where the sketch still doesn't run after following the instructions. If you get problems about the programmer or board not responding, recheck the wirings and try using another power source for the chip ( battery, another Arduino, etc. Some people, and myself, reported having problems when using the same 5V power source from the Arduino. Ideally you should use an external programmer compatible with the SKT500v2 protocol connected to the RX, TX and RST pins.
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I haven't tried the second method, but it might work if you first remove the ATMEGA328P-PU from the Arduino UNO board ( otherwise, it will be programmed ). Or we can just use the RX, TX and RST wiring and upload the sketch as if it was a normal Arduino Mega board, selecting the AVRISP mkII programmer, Arduino Mega 2560 board and programming it. Here we have two options: we can keep the previous wiring and configuration, and upload the sketch using the "Upload the sketch using a programmer" option under the "File" or "Tools" menu, depending on the version. If you see some errors, i always like having the compilation and upload errors shown ( you can enable the output in the program's preferences ). If everything is done correctly, the process will take some seconds and will finish with no errors. Save the changes and now, in our Arduino IDE program, select the Arduino Mega 2560 board and processor, the Arduino as ISP programmer and finally, from Tools, choose Burn the bootloader. Open it with your favourite text editor and locate the ATMEGA2560 section. In my case, the path is "arduino-1.6.5/hardware/arduino/avr/boards.txt". Then reconnect the Arduino board.įind the file called "boards.txt" located in your Arduino installation directory.
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Now that we programmed our Arduino with the ArduinoISP, it's time to program our litlle chip.ĭisconnect the Arduino and proceed to connect the previous wiring PINs.
ARDUINO MEGA PINOUT ISP SERIAL
Select the serial port and finally compile and upload the sketch as you would normally do.
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Select the appropiate board under Tools and the default AVR ISP mkII as programmer. Connect just the Arduino UNO / Arduino Mega, and load the File -> Examples -> ArduinoISP sketch. This step is, in fact, optional, since the chip could be programmed with our sketch directly, but the Arduino bootloader eases the process of reprogramming by using only the serial RX/TX ports. Assuming that our ATMEGA2560 is empty, we will program the Arduino bootloader. +5V VCC => VCC / VCC Programming the bootloader Name ATMEGA 2560 PIN To Arduino UNO PIN Or Arduino Mega PIN Apart from the oscillator ( connected to XTAL1 and XTAL2 ), capacitors (connected to each XTAL and to the GND ) and resistor ( connected to the RESET and VCC ), connect the following depending on the board ( UNO or Mega ) The wiring is pretty simple and is already explained in the ArduinoISP sketch. Will work with other boards, but i only have those ones. Optionally and also usually recommended, a 10K resistor for the reset pin. The chip, in this case an ATMEGA 2560, with the basic components for it to work: a 16Mhz oscillator and two 22pF capacitors.
ARDUINO MEGA PINOUT ISP HOW TO
While it is true that you can find all this information in other websites ( i will try to mention all of them here, too ), none of them clearly explain, step by step, how to do it without other external hardware programmers or special software. This is just a reference guide that i made motivated by the lack of clear information around Internet in the matter of programming an stand-alone Atmel ATMEGA chip different from the "standard" ATMEGA 328P-PU found in the Arduino UNO board.