https://review.openocd.org/c/openocd/+/6665
---
** [tickets:#185] Flash bank address in EFM32 driver is always overriden to
0x0**
**Status:** new
**Milestone:** 0.9.0
**Created:** Wed May 16, 2018 12:25 PM UTC by miceuz
**Last Updated:** Mon Nov 08, 2021 04:33 PM UTC
**Owner:** nobody
I had a task to write into a different flash area in EFM32 microcontroller.
It's an area containing lock bits and encryption keys / tokens.
To solve this I have created a new flash bank in the configuration file:
~~~
set CHIPNAME efm32
source [find target/efm32.cfg]
flash bank lockbits.flash efm32 0x0FE04000 2048 0 0 $_TARGETNAME
~~~
I could not write to this new bank anyway as bank start address is always
overriden to 0x0 in the efm32.c:
uint32_t base_address = 0x00000000;
...
bank->base = base_address;
After I have commented these two lines and recompiled openocd, bank size was
still overriden to the main flash size, but start address came from cfg file
and I could write to this bank.
This is pretty critical when using OTA updates and signed firmware - this makes
it possible to use openocd in this context.
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