S linker update

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Third-party trademarks mentioned are the property of their respective owners. Tip: For priority service, provide us with a few details before you call by clicking the "Get Started" link below. Post your question to Twitter anytime. Manually upgrading your Linksys Wi-Fi Router's firmware. Share the Article:. Firmware updates are bug fixes and functionality enhancements for the router.

Keeping the firmware of your Linksys device updated is important because it fixes issues you may encounter while using it. An updated firmware downloaded from the Linksys Support site may also contain device feature enhancements that are not available in the previous versions. Your router is capable of either an automatic or manual firmware upgrade. This article will show you steps on how to manually upgrade your Linksys Wi-Fi Router's firmware.

Use a wired computer for stable connectivity. It is NOT recommended to update the firmware via Wi-Fi as it may cause permanent damage to the router. Use another browser if your default browser does not work. Alternatively, you can use another computer to perform the upgrade. Download the correct firmware and version for your device.

Make sure that you have created a backup configuration. For instructions on how to create a backup, click here. To manually upgrade the firmware of your router, you need to complete the following steps: NOTE: Steps and images may vary depending on your router's model. Checking the model and version of your router Downloading the firmware Performing the upgrade. Checking the model and version of your router You should find the model number and serial number on the router's label at the bottom.

NOTE: Identifying the appropriate model and version number will help download the correct firmware. If your router has no version number, this means that your device is a version 1 model. To learn how to find your device's model number, click here. Downloading the firmware. Download and save the firmware from the Linksys Support Site to your preferred destination folder i. If you need more help in downloading the firmware, click here.

NOTE: The firmware format is. Performing the upgrade. If the IP address does not work or if it has been changed, check your router's local IP address. For instructions, click here. Step 2: Enter your login credentials. The default password is admin. If you changed or personalized your password, use that instead. Step 4: Click the Browse… button. Step 5: Locate and select the file that you have downloaded then click Open. Step 6: Click the Start Upgrade button. If you have selected an incorrect file, a prompt similar to the image below will appear.

If this happens, click the OK button and repeat Steps 2 to 4 and select the correct file. Step 7: Click Continue when it prompts that the upgrade has been successful.

You should now have manually upgraded the firmware of your Linksys Wi-Fi Router. Resetting and re-configuring the router. I manage to change the start address from the bootloader with the following lines: copied from the bootloader in AN, where strAddr is the new address I want to boot, A or B.

All the download and wirte to flash process is performed from the application. Bootloader's job is only to swap start addresses. My OTA process briefly eplained consists on, first erasing the part of flash that will be used for the new FW.

When all packets are downloaded, another total CRC is performed. If it is correct, a flag will be set, and on reset, the bootloader will boot into the new FW.

All of this works correctly from A to B and from B to A. So far so good. My problem is the following, let's say I managed to upload a code compiled with the B linker, into the image A area. Human error, it can happen. I have done this test and to my surprise, the code boots properly from A area. I don't understand this, as I don't see what was the purpose of the linker file if this is allowed.

However, when "OTAing" again from this new code, it crashes in the flash erasing step. Then, I repeat the same test but changing a little piece of the new code. I commented a few lines, the flash erasing ones. I download it to image A, and when I reset the uC the new program doesn't boot anymore. I am really confused about this, as I dont see consistency here. I may upload an A firmware to B area by error, and not notice it. Some help on this would be really appreciated.

If someone knows a better solution to manage OTA updates, I would also appreciate your hints. I already checked AN, but it involves writing the new code to area B, and then writing it again to area A. That's double time and power. I see my approach much simpler, and It allows me to have two working codes simmultaneously, for reverting an update if it is needed. Have to say that the application is battery constrained, so I am looking for the fastest and less battery consumption possible.

The highest consumption peaks come from the wireless module, though. Running code from compiler, entry address is done by debugger hardware,. But with ropi attributes for code snippets like loadable libraries it sometimes can be done for smaller parts, This could start getting complicated as you would have to move into Linux and Windows as they, of course, allow all exe location independence. You do OTA of 1K blocks, allowing for a repeat of a block in case of failure, use crc16 check for each block and reply back with the crc of that flash block.

If you could upload your linked file it help other to understand what happen. And also upload your application source code. You may search by Google is it possible to get a position independent code. If it is possible, I think your don't need 2 linker file anymore. As I said, I have not spend much time on this study position independent coding and implement one. I still have a few questions that I would like to clarify.

So it compiler always stores the address as a constant near the code and use a offset-to-pc to read it. Are you reading this address? If so, how do you know where it is stored? And do you use the same linker files for all your code versions? Of course, if you do, my previous question would make no sense. As you would always know that address. Now this may be a silly question, but is the address 0xA a known address where you stored your FW version?

If so, what is the best way to store a constant in a known address? Do you do it at compile time? Thank you delu also.