I'm working on a 21489 board .
As my code is Encrypted before fused to the flash, I have to firstly deliver the flash data to decrypt through the TWI, during the boot stage.
What pazzled me is:
(1) Can I use the twi ports during the booting?
(2) As I copied the data to the decryptor and then throw them to the RAM in the boot-kernel, the 256 instructions rule of the boot-kernel would be broken, what should I do to avoid this situtation?
Hope for help!