[Tinkerphones] New tinkerphone gadgets in Goldelico shop?

Wed Nov 15 14:41:37 CET 2017

> Am 15.11.2017 um 09:40 schrieb Belisko Marek <marek.belisko at gmail.com>:
> 
> Hi Nikolaus,
> 
> On Wed, Nov 15, 2017 at 9:01 AM, H. Nikolaus Schaller <hns at goldelico.com> wrote:
>> Hi Marek,
>> 
>>> Am 15.11.2017 um 08:46 schrieb Belisko Marek <marek.belisko at gmail.com>:
>>> 
>>> Hi Nikolaus,
>>> 
>>> On Tue, Nov 14, 2017 at 5:33 PM, H. Nikolaus Schaller <hns at goldelico.com> wrote:
>>>> Hi Marek,
>>>> this are nice findings!
>>>> 
>>>> Did I understand all that correctly that one just needs some 3.3V compatible UART plus host software?
>>>> 
>>>> The FST-01 hardware has three connector pads for
>>>> * GND
>>>> * SWCLK
>>>> * SWDIO
>>>> 
>>>> where it is expected to connect the ST-link. These pin names look a little more like I2C than UART.
>>>> Or are they dual-function?
>>> According other app note:
>>> https://www.google.sk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjyzaDIisDXAhVMfxoKHaALBx0QFggmMAA&url=http%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fapplication_note%2Fcd00167594.pdf&usg=AOvVaw0qX4Dmhs0QSw4vcuN33uhq
>>> it looks like there are various pattern how to start bootloader stored
>>> in internal ROM (burn in production).
>> 
>> This seems to be very similar to the BOOT options of the OMAP processors.
>> One of them is well know to GTA04 users: the AUX button modifies boot sequence from NAND-MMC-UART to MMC-NAND-UART.
>> 
>>> So maybe we will just need some
>>> jumper and connector to plug usb->uart converter and user can then
>>> easily update SW in stm32.
>>>> 
>>>> And do we need to pull up/down some other pin to enable this programming protocol?
> I have at home some STM32 eval board with many uarts so I'll check
> what is necessary to have bootloader running and get back with
> results.

Fine!

In the meantime I found an article in German:

https://www.mikrocontroller.net/topic/439156#new

They discuss
* a 2 EUR ST-Link clone from China
* that it is needed to connect GND, SWDIO, SWCLK, sometimes VDD and sometimes RESET

But a pure USB-flashing solution would even be better (if possible).

BR,
Nikolaus

>>>> 
>>>> Generally I'd like to avoid adding costly hardware which is rarely used.
>>>> One thing is that it may well make the cost go up to 50€ per key...
>>>> And the other is that it needs space making the key bigger.
>>> So adding small connector (rx,tx,gnd) + maybe 1 jumper for force
>>> bootloader to start shouldn't be so expensive ;)
>> 
>> Yes, that would be easy. Maybe we can use the standard FTDI-6pin UART connector like it is used for BeagleBone, Letux Cortex 8, PocketBone etc.
>> 
>> Do you know which pins we have to touch on the STM32F103TB (used by the FST-01)?
>> The schematics shows BOOT0 and BOOT1 pins both tied to GND. And SWDIO and SWCLK are going to jumper.
>> 
>> Or can we even have the boot loader of the STM32F103TB watch USB?
>> 
>> Well, that would be some security risk since a rogue usb driver
>> could reflash the crypto firmware without users noticing...
>> 
>> But a solution could be that flashing requires some solder blob on the PCB.
>> 
>> BR and thanks,
>> Nikolaus
>> 
>>>> 
>>>> BR,
>>>> Nikolaus
>>>> 
>>> BR,
>>> 
>>> marem
>>>>> Am 14.11.2017 um 13:16 schrieb Belisko Marek <marek.belisko at gmail.com>:
>>>>> 
>>>>> Hi,
>>>>> 
>>>>> On Tue, Nov 14, 2017 at 8:55 AM, Belisko Marek <marek.belisko at gmail.com> wrote:
>>>>>> Hi Nikolaus,
>>>>>> 
>>>>>> On Mon, Nov 13, 2017 at 12:12 PM, H. Nikolaus Schaller
>>>>>> <hns at goldelico.com> wrote:
>>>>>>> Hi Marek,
>>>>>>> 
>>>>>>>> Am 13.11.2017 um 11:45 schrieb Belisko Marek <marek.belisko at gmail.com>:
>>>>>>>> 
>>>>>>>> On Mon, Nov 13, 2017 at 11:42 AM, Belisko Marek <marek.belisko at gmail.com> wrote:
>>>>>>>>> Hi,
>>>>>>>>> 
>>>>>>>>> On Mon, Nov 13, 2017 at 8:33 AM, H. Nikolaus Schaller <hns at goldelico.com> wrote:
>>>>>>>>>> Hi all,
>>>>>>>>>> 
>>>>>>>>>>> Am 04.11.2017 um 22:17 schrieb Niels <nift at maclisp.org>:
>>>>>>>>>>> 
>>>>>>>>>>> "H. Nikolaus Schaller" <hns at goldelico.com> writes:
>>>>>>>>>>> 
>>>>>>>>>>>> Hi Paul,
>>>>>>>>>>>> 
>>>>>>>>>>>>> Am 03.11.2017 um 13:06 schrieb Paul Boddie <paul at boddie.org.uk>:
>>>>>>>>>>>>> 
>>>>>>>>>>>>> On Friday 3. November 2017 10.54.44 H. Nikolaus Schaller wrote:
>>>>>>>>>>>>>>> Am 03.11.2017 um 10:32 schrieb Thomas Munker <t.munker at gmx.net>:
>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>> i would like to see some small cryptographic hardware, like eg. yubikey.
>>>>>>>>>>>>>>> At best easy interfaceable to gta02/gta04 or with necessary interface
>>>>>>>>>>>>>>> hardware
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> I have checked what they have:
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> https://www.yubico.com/product/yubikey-4-series/
>>>>>>>>>>>>>> <https://www.yubico.com/product/yubikey-4-series/>
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> It seems they offer USB-A and USB-C. So neither Mini nor Micro-USB. So it
>>>>>>>>>>>>>> needs a proper adapter.
>>>>>>>>>>>>> 
>>>>>>>>>>>>> There is an article on LWN.net about these devices and others:
>>>>>>>>>>>>> 
>>>>>>>>>>>>> https://lwn.net/Articles/736231/
>>>>>>>>>>>>> 
>>>>>>>>>>>>> It covers the Yubikey NEO and Yubikey 4 plus the Nitrokey Pro and FST-01.
>>>>>>>>>>>> 
>>>>>>>>>>>> Interesting reading!
>>>>>>>>>>>> 
>>>>>>>>>>>> To me it looks as if it would best fit our community to simply build
>>>>>>>>>>>> enough FST-01 units, so that they are not out of stock...
>>>>>>>>>>>> 
>>>>>>>>>>>> Everything is said to be free and open, even if the device isn't the fastest one:
>>>>>>>>>>>> 
>>>>>>>>>>>> https://github.com/vinaebizs/fst-01
>>>>>>>>>>>> https://raw.githubusercontent.com/SeeedDocument/FST-01/master/img/Fst-01-schematic.png
>>>>>>>>>>>> 
>>>>>>>>>>>> So it looks not very difficult to have them produced and stocked by us at
>>>>>>>>>>>> a reasonable price.
>>>>>>>>>> 
>>>>>>>>>>> 
>>>>>>>>>>> I agree.
>>>>>>>>>>> 
>>>>>>>>>>> I have been wanting a FST-01 for a while, but not found any place to
>>>>>>>>>>> buy one.
>>>>>>>>>> 
>>>>>>>>>> I have studied the schematics and it will take less than 1 day to prepare for
>>>>>>>>>> producing some clone...
>>>>>>>>>> 
>>>>>>>>>> Cost is also reasonable, e.g. something below 30€ seems feasible for tiny
>>>>>>>>>> quantities (if produced in batches of 10). So it is possible to provide
>>>>>>>>>> permanent supply.
>>>>>>>>>> 
>>>>>>>>>> What I understood is that it needs some flashing tool to be connected to
>>>>>>>>>> a jumper. Maybe someone can elaborate this.
>>>>>>>>>> 
>>>>>>>>>> One thing is to be discussed about the USB interface:
>>>>>>>>>> 
>>>>>>>>>> Should we keep the USB-A plug or try to replace it by an Mini-USB-A so that
>>>>>>>>>> it can be directly plugged into a GTA0x?
>>>>>>>>>> 
>>>>>>>>>> Or even 3 variants with Standard-USB, MiniUSB and µUSB? Or does someone have
>>>>>>>>>> an idea if multiple sockets are feasible?
>>>>>>>>>> 
>>>>>>>>>> USB-C makes no sense IMHO, because then a much faster processor with USB3 speed
>>>>>>>>>> should be used... This would be a completely different project.
>>>>>>>>>> 
>>>>>>>>>> So what can be the next steps?
>>>>>>>>>> * I await your comments and comments about being interested
>>>>>>>>>> * maybe someone should take care about the programming procedures
>>>>>>>>> I have experience with programming stm32 (there exists stm32uart
>>>>>>>>> utility which can burn SW) but in this case I'm unsure.
>>>>>>>>> Does stm32 boot from external spi flash or external spi flash is used
>>>>>>>>> for something else?
>>>>>>>> In meantime I found that it's possible via ST-link only:
>>>>>>>> http://wiki.seeed.cc/FST-01/
>>>>>>>> also here: http://www.gniibe.org/memo/development/fst-01/dongle/fst-01-swd-connection.html
>>>>>>>> so if we do new design maybe would be good to add for user possibility
>>>>>>>> to update FW.
>>>>>>> 
>>>>>>> Nice finding!
>>>>>>> 
>>>>>>> Well, this would mean that we have to clone the ST-link device (where I have not
>>>>>>> yet an idea what is inside) and add another USB socket.
>>>>>>> 
>>>>>>> But there seem to be clones:
>>>>>>> 
>>>>>>> https://www.gearbest.com/development-boards/pp_62989.html?currency=EUR&vip=2275155&gclid=CjwKCAiAoqXQBRA8EiwAIIOWstP9pf8EWlN1SaHyGVUZzDDjkmMVt329W6Misb_BTv_HxOqSr28UMxoCQ_8QAvD_BwE
>>>>>> We can use stm32 serial bootloader which should be present in any
>>>>>> stm32. Here is application note:
>>>>>> http://www.st.com/content/ccc/resource/technical/document/application_note/51/5f/03/1e/bd/9b/45/be/CD00264342.pdf/files/CD00264342.pdf/jcr:content/translations/en.CD00264342.pdf
>>>>>> and also here is small program which can be used to burn image to
>>>>>> stm32 via serial bootloader: https://github.com/jsnyder/stm32ld
>>>>> And we can also use FOSS solution (from same guy who did FST-01) :
>>>>> https://www.hackster.io/gniibe/bbg-swd-93bcea
>>>>>> 
>>>>>> So we don't need ST-link programmed/debugger ;).
>>>>>>> 
>>>>>>> Hm. Well, the ST-Link device is another Microcontroller with built-in firmware.
>>>>>>> So how do we flash that :)
> BR,
> 
> marek
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