It plugs into the parallel (printer) port of a computer
#ATMEL DRAGON BOOTLOADER SERIAL#
They connect to a serial port or parallel port directly and then the computer software twiddles the port to send data to the chips.Ī parallel port programmer looks something like this: If you do not have a 8 - 16MHz crystal, use another AVR to provide the clock signal to the XTAL1 pin.Simple programmers are very inexpensive and very simple. Restore the bootloader at the end of the session. If you want to use debugWire on the Arduino board, connect the ISP as above. Personally, I see no point in ISP'ing an Arduino. You can change the clock fuses for 8MHz Int RC. So put the ATmega328P back into the Arduino.Ĭonnect the Arduino ISP header to the Dragon ISP header and ISP to your heart's content. You will never be able to use ISP unless you provide a clock signal. (probably 16MHz for a Duemilanove Arduino) You see that you need an external 8MHz crystal. Correct me if I'm wrong, but I believe that this sets the 328P to the default 8Mhz. Quote: Edit Edit: The chips have been pre-programmed with the Arduino Optiboot bootloader, which should be hFuse: 0xD6, lFuse: 0xFF, eFuse: 0Ã-05, and lBit: 0x0F. In addition, I'd also like to mention that I have the ATMega328P placed with the notch towards the bottom and the small plastic circle towards the bottom right (see photo), which I believe should be correct.Įdit Edit: The chips have been pre-programmed with the Arduino Optiboot bootloader, which should be hFuse: 0xD6, lFuse: 0xFF, eFuse: 0Ã-05, and lBit: 0x0F. I've attached two photos of the relevant areas from the backside of the board, although I don't think the leftover flux residue is as messy as the photos indicate.Įdit: I don't like to say that I am 100% confident in anything, but I've rewired the headers twice according to the diagram and the wires match up everytime, so there should be a very low chance that the headers are wired incorrectly. The solder joints look fine, although when I soldered the ISP, HV, and 40pin headers I noticed that they only extended beyond the backside of the board by about.
The ATMega 328P microcontrollers were also previously used in the Arduino microcontroller, if this information is of any importance. I'd greatly appreciate it if someone could point out what I'm doing wrong, as I'm getting really frustrated.įor reference, I've attached a photo of the AVR Dragon board, a screenshot of AVR Studio, and the wiring diagram. Unfortunately, I simply cannot get the board to program, no matter what ATMega 328P microcontroller I try, even after double-checking my wiring. In essence, I'm connecting VCC to ISP pin 2 and 40-pin header pin 7, as well as ISP pins 1, 3, 4, 5, and 6 to 40-pin header pins 18, 19, 17, 1, and 8, respectively. Since I'm trying to program the microcontroller in ISP mode from the on-board prototyping area, I've hooked up the ATMega 328P according to the SCKT3200D2, which was suggested in another post on this forum.
#ATMEL DRAGON BOOTLOADER PLUS#
Using AVR Studio 4.18.716 on Windows 7 64-bit and the 10.2 AVR Jungo USB drivers, whenever I try to read the signature of the microcontroller I get the "Entering Programming Mode.FAILED!" error, plus a dialog box that states "A problem occurred when executing the command.". I recently bought an AVR Dragon to program an ATMega 328P microcontroller, and have soldered on the ZIF socket, the HV_PROG header, and the nearby 40-pin header that connects to the ZIF socket. This is my first time using the AVR Dragon to program an AVR microcontroller, so I'll apologize now if I'm making a very dumb mistake.
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