Generating OTA files user1.bin/user2.bin

[sharkx]

Hello all,

I'm using the Windows development setup with eclipse. Everything works fine when downloading the FW through serial.
However, I'm a bit in it over my head when it comes to creating the two files for the OTA update.
The makefile I'm using is probably outdated as it is completely different from makefiles in more recent versions of the SDK.

Anyone has any idea about how to create the OTA files on a Windows environment ?

As a side note, switching to a Linux environment is not an option.

Thanks in advance.

[ESP_Faye]

Hi,

Here is a VirtualBox you can install on your windows PC and used for compilation. http://bbs.espressif.com/viewtopic.php?f=50&t=86

Could it help ?

[sharkx]

Thanks.
It's Linux machine, though... Unless there are no other ideas, I was planning to try this this weekend.
I don't want to start the old debate of Windows-vs-Linux, but I'd like to avoid Linux, even as a VM.

[sharkx]

Ok... Managed to build from the VM; now I have a few more questions; hope someone can enlighten me.
First, let me start with the fact that I have 512k modules, and the SDK version is 1.3.0.

Now, the FOTA document states that userX.bin which is made up of flash.bin+irom0text.bin can be up to 236k.
If I do a standard build, I get an 176.365 eagle.irom0text.bin file.
When I do a userX.bin build I get an ".irom.text will not fit in region irom0_0_seg" error.

Pretty obvious I'm running out of memory space. But ...

If I do a userX.bin build for an 1024k module (or more), the output files are 204k so I'm puzzled; this should easily fit with quite a margin into the 236k space available in the 512k modules according to the documents.

On another approach, I looked at the .ld files, and the size of the irom0_0_seg is 0x2B000 which is 172k; when I add up the flash.bin which is 32k, I get the 204k of the userX.bin file.

So the question is ... why can't the irom0_0_seg be bigger ? Where's the error in my calculations ?

Thanks in advance for any tip.

[ESP_Faye]

Hi,

irom0_0_seg is limited by your flash size.

Could the chapter "Flash Map" in documentation 2A-ESP8266__IOT_SDK_User_Manual help ?

[sharkx]

Thanks for the reply.

Well... yes and no; actually, my problem is that the sources I compile are just a bit over 176 Kb. However, the flash.bin is just 32 Kb; the result is that the userX.bin file tops up at 204 Kb,which is less than the 236 Kb allowed by my flash size.

My question is what happens if I increase the size allowed for the irom0 while, of course, keeping the userX.bin files under 236 Kb ?

[ESP_Faye]

Hi,

Yes, you can change the ld file, notice that, for 512KB flash, flash.bin + irom0.bin can not larger than 236KB.

Thanks for your interest in ESP8266 !

[sharkx]

Thanks for the reply. I did some testing and it's working as described.

More info here : viewtopic.php?f=7&t=1593