I meant esp32 not esr32. The naming is too similar lol
> On 29 Oct 2022, at 15:51, Tim Hardisty <t...@jti.uk.com.invalid> wrote:
>
> Thanks Alan! SAMA5D2 has RMII so definitely a possibility. EFR32 is a much
> better value device compared to SiLabs Bluetooth 5 module currently used, and
> has WiFi as a bonus - so I will investigate it's IDE and see how easy it is
> to implement a GATT-based solution, or to load HCI firmware so I can be
> reasonably confident I'm not digging a big hole for myself if I make this
> change.
>
>
> On 29/10/2022, 13:23, "Alan C. Assis" <acas...@gmail.com> wrote:
>
> More info here:
>
>
> https://e2e.ti.com/support/processors-group/processors/f/processors-forum/366759/am335x-rmii-direct-connection-between-two-devices
>
> Same TI guy who said it was impossible latter talk internally and
> discovered that there was a customer already using it.
>
> BTW, you will need to have RMII supported by both MCUs (yes, ESP32 has
> RMII).
>
> BR,
>
> Alan
>
>> On 10/29/22, Alan C. Assis <acas...@gmail.com> wrote:
>> Hi Tim,
>>
>> I just searched if it was possible to connect two Ethernet MAC
>> directly without using PHY and it is possible, so it will not involve
>> cost for you:
>>
>> https://stackoverflow.com/questions/39503466/can-two-ethernet-mac-chips-be-connected-directly-without-going-thru-phy
>>
>> BR,
>>
>> Alan
>>
>>> On 10/29/22, Tim Hardisty <t...@jti.uk.com.invalid> wrote:
>>> Thanks for your clarifications Alan - I have messaged Espressif (your
>>> reply
>>> ended up in SPAM otherwise I might not have needed to) so I guess I'll get
>>> a
>>> similar answer.
>>>
>>> There is HCI (RCP) firmware for the SiLabs module so I can try that -
>>> it's
>>> the £7 per module saving of Espressif vs. SiLabs, plus getting WiFi for
>>> free
>>> that appeals. SAMA5D2 has Ethernet - unused on my board so it is not an
>>> idea
>>> that is completely out of the question: writing USRSOCK for the
>>> Espressif
>>> module is probably beyond me at this time!
>>>
>>> On 29/10/2022, 00:20, "Alan C. Assis" <acas...@gmail.com> wrote:
>>>
>>> Hi Tim,
>>>
>>> On 10/28/22, Tim Hardisty <t...@jti.uk.com.invalid> wrote:
>>>> Bit of a tangential question this, but I know there are folk on
>>> here
>>> who
>>>> are much more conversant with the way NuttX can be used with WiFi
>>> and
>>>> Bluetooth modules than I am.
>>>>
>>>
>>> I think these are important questions and other people could face
>>> similar issues in the future.
>>>
>>>> I may have an opportunity forced on me to have to respin my custom
>>> board
>>>> which currently has a SiLabs Bluetooth SoC as well as the main
>>> SAMA5D2
>>>> processor. I used that module as I already have experience of it -
>>> but
>>> that
>>>> predates my NuttX journey.
>>>>
>>>> I see there are some very good value combined WiFi + Bluetooth
>>> modules
>>> now
>>>> (Espressif for example...and I know there's a well-known proponent
>>> of
>>> those
>>>> devices here lol) and, having seen a few other questions here, I am
>>> thinking
>>>> that I can go the HCI route and make use of the Bluetooth Stack in
>>> NuttX:
>>>> and add WiFi capability to my board at the same time. Winner!
>>>>
>>>
>>> First let me explain the differences:
>>>
>>> Espressif modules are not used as external modules on NuttX,
>>> everything is integrated inside the chip.
>>>
>>> During the WildernessLab's presentation on NuttX Workshop their team
>>> shown an ESP32 solution sharing WiFi as an external module.
>>> But they didn't use the default USRSOCK route, they implemented a new
>>> solution at home.
>>>
>>>> I'm hoping I can program up a suitable module with generic radio
>>>> co-processor software (HCI I think, and whatever is needed for
>>> WiFi)
>>> and
>>>> access it via UART from my main processor and have it all under the
>>> NuttX
>>>> system in a much more easily managed manner than a separate app on
>>> the
>>>> SiLabs SoC that just happens to communicate on some way with my
>>> main
>>> app on
>>>> the SAMA5D2.
>>>>
>>>> Have I got this right? Is an Espressif module a good choice (email
>>> me
>>> direct
>>>> if you want to !!)?
>>>>
>>>
>>> For Bluetooth (BLE) if there is a HCI firmware to SiLabs chip, then
>>> it
>>> could be possible to you use it, but you'll need to do some tests and
>>> debugging to get things working.
>>>
>>> For WiFi things are more complex because you need to implement a
>>> USRSOCK yourself to the chip.
>>>
>>> I never tested others possibilities: i.e. share Internet using SLIP
>>> between ESP32 and SAMA5D2, should be an easier route if it works, but
>>> of course you wil be limited to UART speed.
>>>
>>> Ethernet could be a better option (since ESP32 has Ethernet
>>> hardware),
>>> but it seems like an ugly and expensive workaround.
>>>
>>> BR,
>>>
>>> Alan
>>>
>>>
>>>
>>
>
>
