Device that assigns programs to the empty processor ?

[Hi world!]

Hello friends,

We use ST-Link when assigning programs to STM8 processors. ST-Link uses the SWIM leg when assigning programs to STM8 processors. We all know that.

I want to make a device. Special bootloader. This device should be able to assign programs to STM operators that do not have programs in the device.

But I don't have a protocol to throw a program into the empty processor. Is there such a protocol? Is such a device possible? Where can we obtain a protocol?

Thanks, good work ..

[Ozone]

> We use ST-Link when assigning programs to STM8 processors. ST-Link uses the SWIM leg when assigning programs to STM8 processors.

Your terminology is ... peculiar. Googel-translate ?

There is a multitude of threads regarding custom bootloaders on this forum, mainly the STM32 section.

A custom Bootloader is basically a normal application that two things:

-> jump to a present main application; or

-> load updates, and program (Flash) them;

[Hi world!]

Sorry, yeah google-translate :)

I made a custom bootloader before. I want to make a device like st-link.

[Ozone]

So, something like this: http://openocd.org/

[Hi world!]

Thank you for sharing link..

Yes, like this. But something simpler is what I want to do.

For example, to program the processor with st-link,

> We upload the hex file to the STVP program.

> Then we send the program to the processor by pressing the relevant button.

It is easy to send the program uploaded to STVP to the st-link device.

What I really want to reach is what kind of protocol it is when assigning a program from the st-link to the processor.

So how is it programmed with SWIM pin even though there is no program in the processor? It is clear that there is a protocol. But where?

[Ozone]

I don't know ST's SWIM interface/protocol in detail. Most probably a proprietary hardware/protocol, before the advent of JTAG.

Cortex M use JTAG, it a reduced version named SWD. It operates on hardware on the target, which operates in parallel and independant of the core itself.

And it is usually everything else but simple.

[Tesla DeLorean]

You mean like a stand alone​ production programmer?

https://www.segger.com/products/production/flasher-st/models/flasher-stm8/

[Hi world!]

I understand. Thank you for reply..

[Hi world!]

Yes, I want to make a similar device. No need to debug. It is enough to program the processor.

But I do not know exactly how to proceed.

[Tesla DeLorean]

Contact local ST sales/support and see if you can get the protocol documentation.​