Figure 73. Post-build commands to generate BIN file
If the build process is done successfully, a BIN file is generated and placed in the Debug folder of the MCUXpresso project.
9.2 USB Mass Storage Device (MSD) update
The bootloader application supports firmware update over the USB MSD. This allows the user to re-flash the main application
binary (not the bootstrap nor bootloader) without a J-Link probe. The bootstrap or bootloader must be updated using a
J-Link probe.
By default, the MSD feature bypasses the signature verification to allow for easier development flow, because signing of images
can be a process not suitable for quick debugging and validation.
Bypassing the image verification is a security threat and it is the responsibility of the product designer to prevent
the violation in production.
NOTE
To put the device into the MSD mode, hold down switch 2 (SW2) and power cycle the board until the pink LED (D2) is lit. The pink
LED turns on and off in 3-second intervals.
NXP Semiconductors
Bootloader
SLN-LOCAL2-IOT Developer’s Guide, Rev. 0, 19 April 2021
User's Guide
60 / 87
