-----Original Message-----
From: Nashif, Anas [mailto:anas.nashif(a)intel.com]
Sent: Saturday, February 27, 2016 4:52 AM
To: Maciek Borzecki <maciek.borzecki(a)gmail.com>
Cc: devel(a)lists.zephyrproject.org; users(a)lists.zephyrproject.org
Subject: [devel] Re: STM32F103x port

On Feb 26, 2016, at 11:08, Maciek Borzecki <maciek.borzecki(a)gmail.com> wrote:

Hi list,

I've done a PoC port of Zephyr to STM32F103VE MCU on a EB-STM_06 dev
board. The port is rather minimal, most of the configuration is
hardcoded. The MCU is configured to use internal HSI clock source,
with PLL feeding a 36MHz clock to SYSCLK and AHB/APB (tried to make it
board agnostic). The minimal UART driver assumes that USART1 will be
used with a fixed speed of 9600kbps. The the best of my knowledge,
this should be enough as a starting point for porting to other boards.

The source code lives here:
https://github.com/bboozzoo/zephyr/tree/bboozzoo/stm32f103 in
bboozzoo/stm32f103 branch.

Obligatory video: https://goo.gl/photos/AGhfXYvv8CswjRRu7 (sorry for
the background sound and overall potato quality). In the vide I flash
the firmware through STLink, the board resets and starts the hello
world sample. The output is received via a USB RS232 adapter. The
sample program has been also modified to print an increasing loop
counter, just to make sure we're not looping the same content.

If anyone feels like this is worth working on I might be able to try
and clean it up a little bit and push out to Gerrit (once I get my
access issues resolved). I also have a couple of boards with STM32F3xx
and STM32L4xx MCUs so I might give these a try, unfortunately all of
these are Cortex-M4 based.

Has anyone looked at ports to Cortex-M0?

There is an effort going on right now, details will be provided soon.

Anas

Cheers,
--
Maciek Borzecki