AnsweredAssumed Answered

PN7462 UART Bootloader

Question asked by Mayank Sharma on Jan 9, 2017
Latest reply on Jul 9, 2017 by Ivo Isaia

Hello Guys,

 

Currently, I am working on secondary UART boot loader using interrupt redirection method. Secondary Bootloader will be on FLASH starting from 0x203000 . I do not find such design elegant  as it introduces delays and dependency on boot loader code. NXP library does not have API for NVIC remap ( FLASH <->RAM) as it looks they are using it themselves for ROM boot loader.  ( if you see datasheet they mentioned that user is not allowed to use 32 bytes at start address of RAM).

Unfortunately PN7462 is Cortex-M0, along with above restrictions, there are not many options to design secondary boot loader.

 

 

I figured out PN7462 NXP is providing USB file system based ROM boot loader and SWD based FW upload; both are not useful.

 

  1. Would it be possible to get ROM boot loader based on UART instead of default USB file system based?
  2. OR
  3. Would it be possible to get a full access to ROM boot loader firmware ( FLASH to RAM ) so I can modify it as per our need.
  4. OR
  5. Any other alternate suggestion.

 

 

Regards,

Mayank

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