9/10/2023 0 Comments Arduino leonardo unknown deviceSelect the correct board from the Tools > Board menu.File > Examples > Adafruit DAP library > flash_from_SD.Click on “Adafruit DAP library by Adafruit”.In the “Filter your search…” field, type “Adafruit DAP library”.(In the Arduino IDE) Sketch > Include Library > Manage Libraries.Plug the USB cable of the Arduino board you will be using as a programmer into your computer.Click the folder that matches the name of your target board.On the MKR boards, it is the footprint for a 0.1” pitch SMD header (e.g., ).You can solder wires to the test points.You can use a 0.1” pitch 2x3 POGO adapter like this one.Other MKR boards and Nano 33 IoT: The SWD header is a 2x3 footprint or test pads on the bottom of the board.You will need an adapter, something like this one.MKR1000: The SWD header is a 0.05” pitch 2x5 male header on the top of the board.A way to make the connections to the SWD pins on your target Arduino board:.A way to connect the SD card to your computer.This could be built into your Arduino board (e.g., MKR Zero), a shield (e.g., MKR SD Proto Shield), or one of the common SD modules. It is possible to use an Arduino board that runs at 5 V as the programmer, but you’ll need to use level shifting circuitry on the programming lines to avoid exposing the target board to 5 V logic levels, which would damage it.An extra Arduino board that runs at 3.3 V.How do I burn the bootloader to my MKR or Nano 33 IoT board? After using Upload Using Programmer, you would need to do another Burn Bootloader before you can go back to uploading to the target board normally via the USB cable. Note that when you do this, the bootloader is erased. You can also use your ISP programmer to upload sketches to the target board via Sketch > Upload Using Programmer. Wait for the process to finish successfully.Select the appropriate programmer from the Tools > Programmer menu.Select the target board from the Tools > Board menu and any other custom Tools menus (e.g.Connect an ISP programmer to the ICSP header on your Arduino board.You are now ready to burn the bootloader using your “Arduino as ISP” programmer. Select the port of your board from the Tools > Port menu.File > Examples > 11.ArduinoISP > Arduino ISP.Connect the programmer board to your computer with a USB cable.Refer to the “Connections” table on the SPI library reference page to determine the pins: Programmer Make the following connections between the Arduino board you will be using as the programmer and the target. Although the “Arduino as ISP” only works for programming targets of the AVR architecture, you can use boards of any architecture as an “Arduino as ISP” programmer. If you don’t have a programmer, you can use a spare Arduino board as an “Arduino as ISP” programmer. The following instructions are for targets that use the AVR architecture (e.g., Uno, Nano, Leonardo, Mega). How do I burn the bootloader to my AVR board? It is not possible to do this via Arduino Web Editor or arduino-cli. Note: Only the Arduino IDE has Burn Bootloader functionality.
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