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Open Flash loader (OFL) template

Flash loader template without the need for a Keil/Segger DSK license. OFL uses cmake and arm-none-eabi to build. OFL uses parts of klib

Create a Flash loader executable

To create a OFL executable you need the following:

  • Information about the RAM of your MCU (needs to be updated in linkerscript.ld)
  • A driver for the peripheral the memory is connected to
  • A driver to communicate with the flash memory
  • Way to feed the watchdog if enabled
  • A way to restore modified registers after deinit

⚠️ When using the flash loader no startup code will run. Make sure to initialize any (non const) static and global variables at runtime as they will not be initialized when loading the flash loader.

More info about setting up the FlashDevice can be found at https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/flashAlgorithm.html

Stack usage

In the current documentation Segger mentions they reserve 512 bytes for the OFL stack with a fallback to 256 bytes for devices with low amount of memory. The previous versions reserved 256 bytes of memory. By default the linkerscript allocates 256 bytes of stack for testing.

Interrupts

by default the J-link will disable the global interrupts when starting a flash loader. If your flash loader needs interrupts (not recommended) the user will need to move the interrupt vector table during init (and revert it when deiniting)

Create a flash loader xml file

SEGGER J-Link uses xml files to add support for external loaders. The xml file configures the follwing:

  • The target Microcontroller for the loader
  • The address the memory is located
  • What executable file to load
  • The name it shows up as in the J-Link software

Example xml file for the LPC1756 is25lq040b open flash loader.

<DataBase>
<Device>
<ChipInfoVendor="NXP"Name="LPC1756" />
<FlashBankInfoName="NOR Flash"BaseAddr="0xA0000000">
<LoaderInfoName="SPI flash loader"MaxSize="0x01000000"Loader="flash_loader.elf"LoaderType="FLASH_ALGO_TYPE_OPEN" />
</FlashBankInfo>
</Device>
</DataBase>

More info can be found at https://wiki.segger.com/J-Link_Device_Support_Kit

Installing your open flash loader

There are 2 ways to install your open flash loader

  1. Manually copying the executable and xml to %appdata%/SEGGER/JlinkDevices/vendor/device_family
  2. Using a installer (like open flashloader installer)

Example

A example is available for the LPC1756 and is25lq040b. Made using the drivers from: klib.

About

Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader).

Topics

cmakecmsis-packexternal-loaderflash-loaderflashloaderj-linkoflopen-flash-loadersegger

Resources

Readme
Activity

Stars

39 stars

Watchers

2 watching

Forks

13 forks
Report repository

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Used by

Contributors

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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GitHub - itzandroidtab/open_flashloader_template: Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader). · GitHub
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Open Flash loader (OFL) template
Flash loader template without the need for a Keil/Segger DSK license. OFL uses cmake and arm-none-eabi to build. OFL uses parts of klib
Create a Flash loader executable
To create a OFL executable you need the following:
  • Information about the RAM of your MCU (needs to be updated in linkerscript.ld)
  • A driver for the peripheral the memory is connected to
  • A driver to communicate with the flash memory
  • Way to feed the watchdog if enabled
  • A way to restore modified registers after deinit
⚠️ When using the flash loader no startup code will run. Make sure to initialize any (non const) static and global variables at runtime as they will not be initialized when loading the flash loader.
More info about setting up the FlashDevice can be found at https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/flashAlgorithm.html
Stack usage
In the current documentation Segger mentions they reserve 512 bytes for the OFL stack with a fallback to 256 bytes for devices with low amount of memory. The previous versions reserved 256 bytes of memory. By default the linkerscript allocates 256 bytes of stack for testing.
Interrupts
by default the J-link will disable the global interrupts when starting a flash loader. If your flash loader needs interrupts (not recommended) the user will need to move the interrupt vector table during init (and revert it when deiniting)
Create a flash loader xml file
SEGGER J-Link uses xml files to add support for external loaders. The xml file configures the follwing:
  • The target Microcontroller for the loader
  • The address the memory is located
  • What executable file to load
  • The name it shows up as in the J-Link software
Example xml file for the LPC1756 is25lq040b open flash loader.
<DataBase>
<Device>
<ChipInfoVendor="NXP"Name="LPC1756" />
<FlashBankInfoName="NOR Flash"BaseAddr="0xA0000000">
<LoaderInfoName="SPI flash loader"MaxSize="0x01000000"Loader="flash_loader.elf"LoaderType="FLASH_ALGO_TYPE_OPEN" />
</FlashBankInfo>
</Device>
</DataBase>
More info can be found at https://wiki.segger.com/J-Link_Device_Support_Kit
Installing your open flash loader
There are 2 ways to install your open flash loader
  1. Manually copying the executable and xml to %appdata%/SEGGER/JlinkDevices/vendor/device_family
  2. Using a installer (like open flashloader installer)
Example
A example is available for the LPC1756 and is25lq040b. Made using the drivers from: klib.
About
Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader).
Topics
cmakecmsis-packexternal-loaderflash-loaderflashloaderj-linkoflopen-flash-loadersegger
Resources
Readme
Activity
Stars
39 stars
Watchers
2 watching
Forks
13 forks
Report repository
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Used by
Contributors
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, 'i');
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GitHub - itzandroidtab/open_flashloader_template: Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader). · GitHub
Skip to content
BranchesTags
Repository files navigation
Open Flash loader (OFL) template
Flash loader template without the need for a Keil/Segger DSK license. OFL uses cmake and arm-none-eabi to build. OFL uses parts of klib
Create a Flash loader executable
To create a OFL executable you need the following:
  • Information about the RAM of your MCU (needs to be updated in linkerscript.ld)
  • A driver for the peripheral the memory is connected to
  • A driver to communicate with the flash memory
  • Way to feed the watchdog if enabled
  • A way to restore modified registers after deinit
⚠️ When using the flash loader no startup code will run. Make sure to initialize any (non const) static and global variables at runtime as they will not be initialized when loading the flash loader.
More info about setting up the FlashDevice can be found at https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/flashAlgorithm.html
Stack usage
In the current documentation Segger mentions they reserve 512 bytes for the OFL stack with a fallback to 256 bytes for devices with low amount of memory. The previous versions reserved 256 bytes of memory. By default the linkerscript allocates 256 bytes of stack for testing.
Interrupts
by default the J-link will disable the global interrupts when starting a flash loader. If your flash loader needs interrupts (not recommended) the user will need to move the interrupt vector table during init (and revert it when deiniting)
Create a flash loader xml file
SEGGER J-Link uses xml files to add support for external loaders. The xml file configures the follwing:
  • The target Microcontroller for the loader
  • The address the memory is located
  • What executable file to load
  • The name it shows up as in the J-Link software
Example xml file for the LPC1756 is25lq040b open flash loader.
<DataBase>
<Device>
<ChipInfoVendor="NXP"Name="LPC1756" />
<FlashBankInfoName="NOR Flash"BaseAddr="0xA0000000">
<LoaderInfoName="SPI flash loader"MaxSize="0x01000000"Loader="flash_loader.elf"LoaderType="FLASH_ALGO_TYPE_OPEN" />
</FlashBankInfo>
</Device>
</DataBase>
More info can be found at https://wiki.segger.com/J-Link_Device_Support_Kit
Installing your open flash loader
There are 2 ways to install your open flash loader
  1. Manually copying the executable and xml to %appdata%/SEGGER/JlinkDevices/vendor/device_family
  2. Using a installer (like open flashloader installer)
Example
A example is available for the LPC1756 and is25lq040b. Made using the drivers from: klib.
About
Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader).
Topics
cmakecmsis-packexternal-loaderflash-loaderflashloaderj-linkoflopen-flash-loadersegger
Resources
Readme
Activity
Stars
39 stars
Watchers
2 watching
Forks
13 forks
Report repository
Releases
Used by
Contributors
Languages

, 'i');
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - itzandroidtab/open_flashloader_template: Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader). · GitHub
Skip to content
BranchesTags
Repository files navigation
Open Flash loader (OFL) template
Flash loader template without the need for a Keil/Segger DSK license. OFL uses cmake and arm-none-eabi to build. OFL uses parts of klib
Create a Flash loader executable
To create a OFL executable you need the following:
  • Information about the RAM of your MCU (needs to be updated in linkerscript.ld)
  • A driver for the peripheral the memory is connected to
  • A driver to communicate with the flash memory
  • Way to feed the watchdog if enabled
  • A way to restore modified registers after deinit
⚠️ When using the flash loader no startup code will run. Make sure to initialize any (non const) static and global variables at runtime as they will not be initialized when loading the flash loader.
More info about setting up the FlashDevice can be found at https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/flashAlgorithm.html
Stack usage
In the current documentation Segger mentions they reserve 512 bytes for the OFL stack with a fallback to 256 bytes for devices with low amount of memory. The previous versions reserved 256 bytes of memory. By default the linkerscript allocates 256 bytes of stack for testing.
Interrupts
by default the J-link will disable the global interrupts when starting a flash loader. If your flash loader needs interrupts (not recommended) the user will need to move the interrupt vector table during init (and revert it when deiniting)
Create a flash loader xml file
SEGGER J-Link uses xml files to add support for external loaders. The xml file configures the follwing:
  • The target Microcontroller for the loader
  • The address the memory is located
  • What executable file to load
  • The name it shows up as in the J-Link software
Example xml file for the LPC1756 is25lq040b open flash loader.
<DataBase>
<Device>
<ChipInfoVendor="NXP"Name="LPC1756" />
<FlashBankInfoName="NOR Flash"BaseAddr="0xA0000000">
<LoaderInfoName="SPI flash loader"MaxSize="0x01000000"Loader="flash_loader.elf"LoaderType="FLASH_ALGO_TYPE_OPEN" />
</FlashBankInfo>
</Device>
</DataBase>
More info can be found at https://wiki.segger.com/J-Link_Device_Support_Kit
Installing your open flash loader
There are 2 ways to install your open flash loader
  1. Manually copying the executable and xml to %appdata%/SEGGER/JlinkDevices/vendor/device_family
  2. Using a installer (like open flashloader installer)
Example
A example is available for the LPC1756 and is25lq040b. Made using the drivers from: klib.
About
Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader).
Topics
cmakecmsis-packexternal-loaderflash-loaderflashloaderj-linkoflopen-flash-loadersegger
Resources
Readme
Activity
Stars
39 stars
Watchers
2 watching
Forks
13 forks
Report repository
Releases
Used by
Contributors
Languages

, 'i');
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})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - itzandroidtab/open_flashloader_template: Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader). · GitHub
Skip to content
BranchesTags
Repository files navigation
Open Flash loader (OFL) template
Flash loader template without the need for a Keil/Segger DSK license. OFL uses cmake and arm-none-eabi to build. OFL uses parts of klib
Create a Flash loader executable
To create a OFL executable you need the following:
  • Information about the RAM of your MCU (needs to be updated in linkerscript.ld)
  • A driver for the peripheral the memory is connected to
  • A driver to communicate with the flash memory
  • Way to feed the watchdog if enabled
  • A way to restore modified registers after deinit
⚠️ When using the flash loader no startup code will run. Make sure to initialize any (non const) static and global variables at runtime as they will not be initialized when loading the flash loader.
More info about setting up the FlashDevice can be found at https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/flashAlgorithm.html
Stack usage
In the current documentation Segger mentions they reserve 512 bytes for the OFL stack with a fallback to 256 bytes for devices with low amount of memory. The previous versions reserved 256 bytes of memory. By default the linkerscript allocates 256 bytes of stack for testing.
Interrupts
by default the J-link will disable the global interrupts when starting a flash loader. If your flash loader needs interrupts (not recommended) the user will need to move the interrupt vector table during init (and revert it when deiniting)
Create a flash loader xml file
SEGGER J-Link uses xml files to add support for external loaders. The xml file configures the follwing:
  • The target Microcontroller for the loader
  • The address the memory is located
  • What executable file to load
  • The name it shows up as in the J-Link software
Example xml file for the LPC1756 is25lq040b open flash loader.
<DataBase>
<Device>
<ChipInfoVendor="NXP"Name="LPC1756" />
<FlashBankInfoName="NOR Flash"BaseAddr="0xA0000000">
<LoaderInfoName="SPI flash loader"MaxSize="0x01000000"Loader="flash_loader.elf"LoaderType="FLASH_ALGO_TYPE_OPEN" />
</FlashBankInfo>
</Device>
</DataBase>
More info can be found at https://wiki.segger.com/J-Link_Device_Support_Kit
Installing your open flash loader
There are 2 ways to install your open flash loader
  1. Manually copying the executable and xml to %appdata%/SEGGER/JlinkDevices/vendor/device_family
  2. Using a installer (like open flashloader installer)
Example
A example is available for the LPC1756 and is25lq040b. Made using the drivers from: klib.
About
Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader).
Topics
cmakecmsis-packexternal-loaderflash-loaderflashloaderj-linkoflopen-flash-loadersegger
Resources
Readme
Activity
Stars
39 stars
Watchers
2 watching
Forks
13 forks
Report repository
Releases
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
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function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - itzandroidtab/open_flashloader_template: Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader). · GitHub
Skip to content
BranchesTags
Repository files navigation
Open Flash loader (OFL) template
Flash loader template without the need for a Keil/Segger DSK license. OFL uses cmake and arm-none-eabi to build. OFL uses parts of klib
Create a Flash loader executable
To create a OFL executable you need the following:
  • Information about the RAM of your MCU (needs to be updated in linkerscript.ld)
  • A driver for the peripheral the memory is connected to
  • A driver to communicate with the flash memory
  • Way to feed the watchdog if enabled
  • A way to restore modified registers after deinit
⚠️ When using the flash loader no startup code will run. Make sure to initialize any (non const) static and global variables at runtime as they will not be initialized when loading the flash loader.
More info about setting up the FlashDevice can be found at https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/flashAlgorithm.html
Stack usage
In the current documentation Segger mentions they reserve 512 bytes for the OFL stack with a fallback to 256 bytes for devices with low amount of memory. The previous versions reserved 256 bytes of memory. By default the linkerscript allocates 256 bytes of stack for testing.
Interrupts
by default the J-link will disable the global interrupts when starting a flash loader. If your flash loader needs interrupts (not recommended) the user will need to move the interrupt vector table during init (and revert it when deiniting)
Create a flash loader xml file
SEGGER J-Link uses xml files to add support for external loaders. The xml file configures the follwing:
  • The target Microcontroller for the loader
  • The address the memory is located
  • What executable file to load
  • The name it shows up as in the J-Link software
Example xml file for the LPC1756 is25lq040b open flash loader.
<DataBase>
<Device>
<ChipInfoVendor="NXP"Name="LPC1756" />
<FlashBankInfoName="NOR Flash"BaseAddr="0xA0000000">
<LoaderInfoName="SPI flash loader"MaxSize="0x01000000"Loader="flash_loader.elf"LoaderType="FLASH_ALGO_TYPE_OPEN" />
</FlashBankInfo>
</Device>
</DataBase>
More info can be found at https://wiki.segger.com/J-Link_Device_Support_Kit
Installing your open flash loader
There are 2 ways to install your open flash loader
  1. Manually copying the executable and xml to %appdata%/SEGGER/JlinkDevices/vendor/device_family
  2. Using a installer (like open flashloader installer)
Example
A example is available for the LPC1756 and is25lq040b. Made using the drivers from: klib.
About
Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader).
Topics
cmakecmsis-packexternal-loaderflash-loaderflashloaderj-linkoflopen-flash-loadersegger
Resources
Readme
Activity
Stars
39 stars
Watchers
2 watching
Forks
13 forks
Report repository
Releases
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
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} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
})();
GitHub - itzandroidtab/open_flashloader_template: Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader). · GitHub
Skip to content
BranchesTags
Repository files navigation
Open Flash loader (OFL) template
Flash loader template without the need for a Keil/Segger DSK license. OFL uses cmake and arm-none-eabi to build. OFL uses parts of klib
Create a Flash loader executable
To create a OFL executable you need the following:
  • Information about the RAM of your MCU (needs to be updated in linkerscript.ld)
  • A driver for the peripheral the memory is connected to
  • A driver to communicate with the flash memory
  • Way to feed the watchdog if enabled
  • A way to restore modified registers after deinit
⚠️ When using the flash loader no startup code will run. Make sure to initialize any (non const) static and global variables at runtime as they will not be initialized when loading the flash loader.
More info about setting up the FlashDevice can be found at https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/flashAlgorithm.html
Stack usage
In the current documentation Segger mentions they reserve 512 bytes for the OFL stack with a fallback to 256 bytes for devices with low amount of memory. The previous versions reserved 256 bytes of memory. By default the linkerscript allocates 256 bytes of stack for testing.
Interrupts
by default the J-link will disable the global interrupts when starting a flash loader. If your flash loader needs interrupts (not recommended) the user will need to move the interrupt vector table during init (and revert it when deiniting)
Create a flash loader xml file
SEGGER J-Link uses xml files to add support for external loaders. The xml file configures the follwing:
  • The target Microcontroller for the loader
  • The address the memory is located
  • What executable file to load
  • The name it shows up as in the J-Link software
Example xml file for the LPC1756 is25lq040b open flash loader.
<DataBase>
<Device>
<ChipInfoVendor="NXP"Name="LPC1756" />
<FlashBankInfoName="NOR Flash"BaseAddr="0xA0000000">
<LoaderInfoName="SPI flash loader"MaxSize="0x01000000"Loader="flash_loader.elf"LoaderType="FLASH_ALGO_TYPE_OPEN" />
</FlashBankInfo>
</Device>
</DataBase>
More info can be found at https://wiki.segger.com/J-Link_Device_Support_Kit
Installing your open flash loader
There are 2 ways to install your open flash loader
  1. Manually copying the executable and xml to %appdata%/SEGGER/JlinkDevices/vendor/device_family
  2. Using a installer (like open flashloader installer)
Example
A example is available for the LPC1756 and is25lq040b. Made using the drivers from: klib.
About
Template to build a flash algorithm for the Segger J-link software (and CMSIS). (Works without having a DSK license. Rip Open Flash Loader).
Topics
cmakecmsis-packexternal-loaderflash-loaderflashloaderj-linkoflopen-flash-loadersegger
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