66 lines
2.0 KiB
ReStructuredText
66 lines
2.0 KiB
ReStructuredText
.. zephyr:code-sample:: code_relocation_nocopy
|
|
:name: Code relocation nocopy
|
|
|
|
Relocate code, data, or bss sections using a custom linker script.
|
|
|
|
Overview
|
|
********
|
|
A simple example that demonstrates how relocation of code, data or bss sections
|
|
using a custom linker script.
|
|
|
|
Differently from the code relocation sample, this sample is relocating the
|
|
content of the ext_code.c file to a different FLASH section and the code is XIP
|
|
directly from there without the need to copy / relocate the code. All other code
|
|
(e.g. main(), Zephyr kernel) stays in the internal flash.
|
|
|
|
nRF5340 DK platform instructions
|
|
********************************
|
|
|
|
The nRF5340 DK has a 64 Mb external flash memory supporting Quad SPI. It is
|
|
mapped to 0x10000000.
|
|
|
|
To build and flash the application (including the external memory part):
|
|
|
|
.. zephyr-app-commands::
|
|
:zephyr-app: samples/application_development/code_relocation_nocopy
|
|
:board: nrf5340dk/nrf5340/cpuapp
|
|
:goals: build flash
|
|
:compact:
|
|
|
|
STM32F769I-Discovery platform instructions
|
|
******************************************
|
|
|
|
The stm32f769i_disco has 64MB of external flash attached via QSPI. It is mapped
|
|
to 0x90000000.
|
|
|
|
.. zephyr-app-commands::
|
|
:zephyr-app: samples/application_development/code_relocation_nocopy
|
|
:board: stm32f769i_disco
|
|
:goals: build flash
|
|
:compact:
|
|
|
|
STM32 b_u585i_iot02a Discovery kit instructions
|
|
***********************************************
|
|
|
|
The b_u585i_iot02a has 64MB of external flash attached via OSPI. It is mapped
|
|
to 0x70000000.
|
|
|
|
.. zephyr-app-commands::
|
|
:zephyr-app: samples/application_development/code_relocation_nocopy
|
|
:board: b_u585i_iot02a
|
|
:goals: build flash
|
|
:compact:
|
|
|
|
Execution output
|
|
****************
|
|
|
|
.. code-block:: console
|
|
|
|
*** Booting Zephyr OS build v3.0.0-rc3-25-g0df32cec1ff2 ***
|
|
Address of main function 0x4f9
|
|
Address of function_in_ext_flash 0x10000001
|
|
Address of var_ext_sram_data 0x200000a0 (10)
|
|
Address of function_in_sram 0x20000001
|
|
Address of var_sram_data 0x200000a4 (10)
|
|
Hello World! nrf5340dk/nrf5340/cpuapp
|