FAQ_ How to lock the program in BlueNRG software to prevent it from being read out

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FAQ_ How to lock the program in BlueNRG software to prevent it from being read out [Copy link]

 

This article was written by Lucien KUANG, an engineer at ST, and was published on 19-Jun-2019

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Q: Customers sometimes require confidentiality of their products to prevent other competitors from copying them. They often ask how to encrypt the program.
A: The BlueNRG-1/2 Flash utility itself provides read protection. Checking this option during downloading can prevent the program from being read.

Read externally to encrypt the program.

Another way is to prevent the program from being read out by software. It is mainly to write the last two words of the last page of Flash. As long as the data written is not all FF, read protection can be achieved. The following is the reference code. It can be called during initialization.