Changes

Before updating, you must put your ChipWhisperer into bootloader modeSee https://chipwhisperer. Once put into this mode you will need to load a new firmware filereadthedocs. There is two ways of doing it: the ''automatic'' method, and the ''manual'' methodio/en/latest/api. The automatic method is done through the GUI, and works if you have valid html#firmware image loaded. The ''manual'' method is always guaranteed to work. The automatic method is: Using ChipWhisperer-Capture GUI # Connect to the ChipWhisperer.# From the ''Tools'' menu select ''CW Firmware Preferences''# Select the ''Open SAM3U Update Widget'' button.# Press the ''Enable Bootloader Mode'' button.# You will get an error, and the ChipWhisperer will disconnect. This is normal, and indicates the USB mode changed suddenly.# The blue LED will stop flashing, and the device will reconnect in programmer mode (see below). Once you are in bootloader mode, both the blue and red LED will be very dimmly lit: [[File:lights_prog.jpg|400px]] This indicates it is in bootloader mode. The device will now attach as a serial port. If you are using Windows this may take a few minutes to happen. If using Linux, you can use ''dmesg'' to verify the serial port was connected OK. If this doesn't work, see the page [[Manual SAM3U Firmware Update]] update for details instructions on how to manually enter bootloader mode. You can return to this page for the actual programming - you don't need to install/use the BOSSA utility if you follow those manual directions. You simply need to force the system into bootloader mode using those directions. To actually program the file, we use the second part of the dialog box you already had open: [[File:sam3uupdate.png|400px]] Once we are in bootloader mode, you can follow these steps: # Hit "Update List", and select the serial port update the SAM3U attached as.# To use the default firmware file, leave the "Built-in" radio-box selected. If you want a custom firmware you can select the "External" mode.# Hit the "Run Program" button# Once completed, unplug/replug your device and it should come to life.# Close the update widgets, and reconnect to your ChipWhisperer.