nrfjprog programming custom flash regions

[mathir]

Lets assume i have 3 hex files:

1. softdevice.hex (addresses 0x0 to 0x1f000)

2. mySoft1.hex (addresses 0x1f000 to (0x1f000 + size of my program) and 0x7ff00 to 0x7ff80)

3. mySoft2.hex (addresses from 0x7ff80 to 0x80000)

I would like to program all these hex files using nrfjprog. The problem: flash is programmed in 4kB sectors, so whole data from certains sectors are erased (writing mySoft1.hex after mySoft2.hex will erase 0x7f000-0x80000 locations). My question is how to program one page of memory preserving the already written data.

[Sigurd]

Hi,

You can use mergehex for this. With mergehex you can merge up to three hex files into a single hex file.

With this command:

mergehex -m file1.hex file2.hex file3.hex -o output_file.hex

the file1.hex, file2.hex and file3.hex will be merged into the output_file.hex