Arduino Genuino Zero Atmel Studio Can Not Upgrade Firmware

Arduino Genuino Zero Atmel Studio can not upgrade firmware after trying to connect to target microcontroller using device programming dialog box or start without debugging icon. How to fix the firmware upgrade problem when the firmware won’t upgrade. A failed firmware upgrade prevents the use of the target board with Atmel Studio 7. The firmware appears to upgrade, but does not, as described below.

Genuino Zero Atmel Studio can’t Upgrade Firmware Problem

After opening the Programming Dialog box in Atmel Studio 7, or trying to program or debug the board, the Firmware Upgrade dialog box opens. After clicking the Upgrade button in the dialog box, the firmware appears to upgrade immediately. When trying to connect to the board again with Atmel Studio, the Firmware Upgrade dialog box appears again saying that the firmware needs upgrading. The dialog box appears as follows after the attempted upgrade that does not work. Here the Firmware Upgrade dialog box appears after the Apply button was clicked in the Device Programming dialog box.

Arduino Genuino Zero Atmel Studio Can Not Upgrade Firmware

Arduino Genuino Zero Atmel Studio Can Not Upgrade Firmware

This problem occurred on my Genuino Zero board, but I have read reports of it happening on Arduino M0 Pro boards and Atmel SAMD21 Xplained boards as well. The firmware that Atmel Studio is attempting to upgrade is the firmware in the embedded debugger (EDBG) chip found on Arduino Genuino Zero, Arduino M0 Pro and SAMD21 Xplained Pro boards.

Arduino Genuino Zero Atmel Studio Can Not Upgrade Firmware Solution

This solution simply stops stops Atmel Studio from automatically checking if the firmware needs upgrading. It does not actually upgrade the firmware on the EDBG chip.

The following steps describe how to bypass the firmware upgrade in Atmel Studio.

1. Open the Device Programming Dialog Box

Start Atmel Studio and then click the Device Programming icon as shown in the image below. The icon is found on the top toolbar. This opens the Device Programming dialog box.

Atmel Studio Device Programming Icon

Atmel Studio Device Programming Icon

2. Open the Device Programming Settings

In the Device Programming dialog box, select EDBG as the tool and SWD for the interface. In the Device field, select the target microcontroller on the board. For Arduino / Genuino Zero / M0 Pro boards this is ATSAMD21G18A. For the Atmel SAMD21 Xplained Pro, it is ATSAMD21J18A.

When clicking the Apply button in the Device Programming dialog box, the Firmware Upgrade dialog box appears and then fails to properly upgrade the firmware. Instead of clicking the Apply button, click the Settings icon at the right of the Device Programming dialog box as shown in the image below.

Device Programming Settings

Device Programming Settings

3. Disable the Check Firmware Setting

In the Options dialog box, find Tools near the bottom of the left pane and expand it. Click the Tool settings item to select it. In the right pane, double click True at the right of Check firmware to change it to False. These steps are shown in the image below.

Disable Check Firmware

Disable Check Firmware

Click the OK button to close the dialog box.

4. Test the Changes

Finally test the changes. Back in the Device Programming dialog box, with the correct tool, device and interface selected, click the Apply button. This time the Firmware Upgrade dialog box should not appear and it should be possible to program and debug the target microcontroller. Click the Read button next to Device Signature to make sure that the communications with the target microcontroller is working. These steps are shown in the image below.

Read Device Signature

Read Device Signature


After completing the above steps, I was able to program my Arduino Genuino Zero board using Atmel Studio. I first backed up the bootloader using the Device Programming dialog box and then loaded a C program that blinks the on-board LED. This proved that the EDBG interface could be used to read and write without upgrading the firmware.

Although this solution may not be ideal because the EDBG firmware is not updated to the latest version, it still solved the problem of having an endless firmware upgrade loop that fails to upgrade the firmware and then prevents use of the target board with Atmel Studio.


Atmel Software Framework Tutorial – ARM Cortex

An Atmel Software Framework Tutorial series that shows how to use Atmel Software Framework (ASF) to program ARM Cortex microcontrollers using Atmel Studio and the C programming language.

About ASF

Atmel Software Framework (ASF) consists of a number of modules that can be added to a C language project in Atmel Studio. Adding ASF modules to a project makes various functions available for initializing and using hardware and software services, cutting down development time.

As an example, adding the IOPORT ASF module to a project allows pins and ports of a microcontroller to be initialized and accessed using functions from the IOPORT module. Functions from the IOPORT module can then be called to set up pins or ports as inputs or outputs and other functions allow the pins or ports to be read or written to without having to use the hardware at a register level.

Atmel Software Framework Tutorial Contents

The ASF tutorial series consists of the following parts thus far. More parts are being added to the tutorial series each week.


Introduces the Atmel software framework tutorial and shows how ASF is structured.


How to create a new ASF project for an Atmel Evaluation board. The example project blinks the on-board LED.


How to create an ASF user board project. If you are going to use ASF on your own custom or user board, you will need to know how to write ASF user board projects from scratch. This type of project can still be created and tested on an Atmel evaluation board. Most of this tutorial series shows how to create various projects from scratch using an ASF user board project as this is what is needed in real world applications that use a custom board.


How to add ASF to an existing project that was not started as an ASF project.


There are slight differences between ASF projects created for Atmel evaluation boards and user board ASF projects. This part of the tutorial shows the differences between the project types such as which files are different and where to changes settings in the files.


How to enable the on-chip oscillators of the microcontroller to use the external crystals instead of the internal R/C oscillators in ASF.


A quick start checklist for creating new ASF user board projects. Where to add code and to change settings in a new ASF project.


Using ASF functions to read and write individual microcontroller pins used for general purpose input/output.


How to write to a microcontroller port or group of pins from a port using ASF functions.


Reading and writing a port or group of port pins rather than individual port pins.


How to configure C standard input/output functions such as printf() and scanf() to use a UART for input/output.

Further Parts of the Tutorial Series

Further parts will be added to the tutorial series until it is complete. Check the index and menu of the tutorial for additional parts.

Unpacking a Atmel SAM4N Xplained Pro Evaluation Board

The Atmel SAM4N Xplained Pro evaluation board contains a ATSAM4N16C microcontroller. The board itself is rather basic with only one user programmable LED and one user programmable push-button switch (the second switch is a reset switch). Pins of the microcontroller are available on headers on the board.

An on-board Embedded Debugger is included on the board, so that no external tools are required to program or debug the ATSAM4N16C.

The video below shows the evaluation board being unpacked.

Some features of the ATSAM4N16C microcontroller are:

  • ARM Cortex-M4 that can run up to 100MHz
  • 3 USARTs and 4 UARTS
  • Real Time Clock (RTC) with calendar and alarm features
  • 10 bit ADC and DAC
  • 1Mb Flash memory
  • 80kb SRAM
  • The usual SPI, TWI, timers, PWM, etc.

The ATSAM4N16C does not contain any USB ports, Ethernet or external bus.

Resources from Atmel

Installing the SAM-BA Driver for Atmel SAM Microcontrollers

The USB CDC driver for Atmel SAM ARM microcontrollers allows a USB microcontroller that is running the SAM-BA software to be configured as a virtual COM port on a PC.

This allows user software to be loaded to the microcontroller via a USB cable using the SAM-BA PC application software.

The article on Installing the SAM-BA USB CDC Driver for Atmel ARM Microcontroller in Windows shows how to install and test the driver.

Terminal emulator software is used to communicate with the embedded SAM-BA software on the microcontroller and request the SAM-BA software version number. This is done to test that the driver and connections are working properly.

Large PLC – Open Source Hardware

The large brick-type open source PLC has 22 digital inputs, 6 analog inputs and 16 transistor outputs. It also features a SD card socket, 2 RS-232 ports, 1 RS-485 port, 1 USB device port and a JTAG port for programming and debugging.

Large Open Source PLC

Large Open Source PLC

All the source files including circuit diagrams for building the large open source PLC are available for download at the above link.