We have been attempted to implement the UBL on the Dongle that came with the CC2540DK using the HostTestApp demo application.
We have following all the instructions found in "Universal Boot Loader for SOC-8051 by USB-MSD Developer's Guide.pdf" that came with the BLE-CC254x-1.2.1 stack. 100ms after osal_start_system() function is called, we call the function ublAppForceBoot(); From here it just doesn't do anything.
We have also attempted to follow the Wiki instuctions below that indicate a manual copy and paste of the the UBL gex had to be performed. This also did not work.
http://processors.wiki.ti.com/index.php/CC253x_Serial_Boot_Loader
Are the instructions documented in the UBL developers guide correct and if so, why would the UBL not function?
Ryan