We got some engineering samples of ESP32-C3 modules.
They are smaller than ESP32-WROOM and WROVER and measure just 17x13x2.5 mm!
This is the first Espressif product with RISC-V core, the datasheet is on their web.
This is also the first SOC with RISC-V core we have access to, so we are excited to learn more the ISA on low level.
Any resources to recommend? Is there something like small disassembler/monitor with few commands like read/write to memory and list code, which to allow you to write in assembly and run code?
ESP32-S2 is new SOC from Espressif, compared to ESP32 it has no Bluetooth and Ethernet connectivity, but offers plenty of GPIOs and has native USB-OTG interface.
Our first version uses USB to Serial converter as Espressif IDE at that time didn’t support programming via the native USB interface, but now their SDK supports USB programming, so we released new version without the not necessary USB-Serial converter.
To the best of our knowledge this is the first board to the market where USB-OTG is implemented and the board can work both in device and host mode ( at least as hardware 🙂 )
The hardware now is ahead of software as USB host functionality in SDK is missing yet, but at least we provide hardware platform for the future.
ESP32-S2-DevKit-Lipo-USB is OSHW so the CAD files are available on GitHub if someone want to see how we implement the USB-OTG. It’s really complicated as we wanted to keep the handheld battery operation and keep the LiPo charger and battery circuit. This leads to quite some over engineering around the power supply as the battery should charge when USB-OTG works in Device mode, and source 5V to the USB-OTG when it’s in Host mode!
It took us 2 revisions until we made it right, so thanks for your patience, now the board is in stock and orderable.
ESP32-S2-WROVER-DevKit-Lipo-USB with WROVER module with 2MB RAM is also available for these who want to write big applications.
ARM-USB-OCD-H is a low-cost ARM OpenOCD debugger. It supports targets from 1.65V up to 5.0V. Many SOC manufacturers like Intel, Intel/Movidius, nVidia and others use it in their development work. Intel quotes ARM-USB-OCD-H and ARM-JTAG-20-10 in their appnote “Source Level Debug using OpenOCD/GDB/Eclipse on Intel® Quark™ SoC X1000”.
A few month ago we got an interesting question. A new SOC manufacturer was trying to debug their SOC with ARM-USB-OCD-H, but the problem was that their target was working on 1.2V. They asked us if we could modify our JTAG to be able to work at lower than 1.65V targets.
Our engineers identified a couple of components which we could upgrade to support lower voltages. The final result was that the ARM-USB-OCD-HL new modification of the JTAG can now work with targets from 0.65V up to 5.5V.
This pretty much covers all existing SOCs on the market.
STMP1-OLinuXino-LIME2 Industrial grade Linux Computer project took us almost an year of work to build proper software support for our hardware with mainline uboot and kernel.
ST demo board uses Yocto with kernel 5.4, our images use Linux Kernel 5.10.12
These who monitor our Official images at https://images.olimex.com probably nottice that we already have images with Debian Buster and Ubuntu Focal for STM32MP1 where almost everything now work with mainline Linux Kernel 5.10.12.
We had lot of troubles around the Ethernet, but now it works pretty well!
CAN-FD – works!
Two USB High speed hosts with 1A current – works!
LCD – works
HDMI – works!
eMMC Flash boot – works!
PMU and LiPo charger battery support – works
Two things on this board left not complete:
low power modes
USB-OTG
New prototypes rev.B now are in production, the Chinese New Year will delay them to end of February. We hope meantime to solve these two last issues and run production.
UPDATE: As some people wanted to know what was the Ethernet issue we were struggling so long, I posted in the comment section.
For the USB-OTG my guess is that it’s also some silly issue so people may help:
STM32MP1 has two High speed USB hosts and one Full speed USB-OTG, here is snip from their Hardware development document:
Here is our schematic which follows above guide:
The two High Speed USB hosts work as expected, but the USB-OTG has issue summarized here: https://pastebin.com/i6G90kdg
What makes us a little bit suspicious is that STM in their own demo board didn’t follow their Hardware Guide and were wiring one of their High speed USB as OTG and connecting USB hub to the other, ignoring the Full speed USB at all.
Happy New Year! Olimex team wish you health and best of luck in the new 2021. Let all troubles from 2020 go away!
Update on UK shipping:
Brexit brings some troubles for trade with UK. We stopped the shipping to UK on December 23 2020 as we didn’t know how to handle the orders when we are back on January 4th.
When we got back in office we had expected news: The couriers raised their prices with almost 50% due to the extra efforts around the new UK regulations, but this was just the beginning.
From January 1st 2021 all shipments to UK with value under GBP 135 must be with included charged VAT. For this purpose all online shops which ships to UK must register for UK customs EORI and UK VAT-ID. They have to charge the VAT at the time of shipping and to pay to UK government all collected VAT at the end of the month. The shipments above GBP 135 are shipped with export declaration and without VAT as for any other countries outside EU.
The big platforms like Amazon, ebay etc. also need to register (probably they already did) and collect the VAT from their sellers.
We still not have EORI neither UK VAT-ID so we can’t ship small orders. Orders above EUR 200 are processed normally. We are sorry for this inconvenience and apologise to all our small UK customers.
Update on current boards:
iMX8Qmax board high speed signals are completely routed, we now make the connector arrangements on the PCB and hope to be ready for prototypes in March.
S3-OLinuXino revision B of the board prototypes works great. Bootlin reported that their mainline driver for CSI2 work with RaspberryPi IMX219 8 Mpix camera, CSI1 is with OV2640 2Mpix camera connector. Gigabit ethernet, Audio microphone, PoE option, eMMC/SPI Flash option, etc all are tested and work fine. We are making now final touch ups and will run production.
STMP1-SOM small module with STM32MP151/3/7 is on prototype Revision B and everything exept the Audio is working fine. Production will follow in March.
STMP1-OLinuXino-LIME2 is stuck at Gigabit Ethernet. We had many other issues which were solved, but this remains. The original ST design uses RTL8211 which is commercial grade, we put KSZ9031RNXIC-TR instead and there is neither correctly sent neither correctly received package. We use this chip in Allwinner A20 and A64 designs without problems. We used all combinations of delays of the clocks and singnals etc with no luck. Our guess is the port hardware drivers are somehow incompatible with this PHY and are either slow either make rings which confuse the PHY chip. If someone has more knowledge and can help, we can send board.
Christmas is approaching. Olimex will be closed from December 24 to January 4th. You can place your orders between December 24 and January 3rd but they will be processed on January 4th.
Meantime based on past experience we do not recommend you to use Airmail shipping option in December. The posts are flooded with parcels and usually they will take 30 or more days to arrive.
DHL/UPS usually deliver next day in Europe and in few days outside EU (depend on customs delays, Covid delays etc), so our advice is if you want to receive your parcel before December 24 to complete your order latest on December 21st.
We recently released our ESP32-S2-DevKit-Lipo development board with ESP32-S2 SOC. It has the same functionality and pinout as Espressif ESP32-S2-Saola-1, but in addition it has a LiPo charger and battery management and is designed for Ultra low power – only 30uA consumption when on battery and deep sleep. This allows handheld battery operated applications. The LiPo part can power external sensors/circuits. This board has a built-in programmer with a CH340T USB-Serial convertor.
Many have noticed that ESP32-S2 has a native USB-OTG. Then why did we put the CH340T on it? The reason is that the Espressif SDK didn’t support USB back when we designed this board.
Now Espressif SDK adds support for a USB bootloader and the programming of the ESP32-S2 can be done by the native USB interface, we decided to make a new revision where the native USB-OTG interface is used.
We wanted to keep the LiPo battery functionality and this created an interesting technical challenge: the USB-OTG port can be used both as device and host. When used as a device, the board is powered by the USB and LiPo battery is charging. When used as a USB host (i.e. you can attach USB devices to the port) the USB port must supply 5V to the USB devices connected. Our first prototype had a power supply problem: when the ESP32-S2 works as a host the battery is powering the USB-OTG port with 5V, but there is attached also the LiPo charger circuit, so infinite loop is made: battery -> step up to 5V -> USB -> LiPo chgarger -> battery 🙂
This issue was preventing us from releasing this board earlier, but now on Rev.B all of these issues are fixed so we are about to run production.
Needless to say we kept the ultra low power design and the new board also consumes as low as 30uA in deep sleep.
Searching on the net it seems that no one else has implemented a USB-OTG functionality to the ESP32-S2 yet so this one will be the first. Also to the best of our knowledge there is still no software support for a USB host on the ESP32-S2 but we hope after our hardware is released this will push and accelerate the software development further.
ESP32-S2-DevKit-LiPo-USB is going to be released as Open Source Hardware like other IoT solutions we have.
OPC Unified Architecture (OPC UA) is an open, implemented under GPL 2.0 license, machine to machine communication protocol for industrial automation developed by the OPC Foundation.
The OPC UA protocol specification consists of 14 documents for a total of 1250 pages. Due to this complexity, existing implementations are usually incomplete.
This is why we were puzzled to see on Twitter post by Selftronics that they made OPC UA server running on ESP32-EVB!
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