RISC-V microcontrollers from GigaDevice

[oPossum]

https://www.cnx-software.com/2019/08/23/gigadevice-gd32v-risc-v-mcu-development-board/amp/

The new GD32VF103 series RISC-V MCU family features 14 models with the following key specifications:

Core – GD32VF103 RISC-V “Bumblebee Core” @ 108 MHz
Memory – 8KB to 16KB SRAM
Storage  – 16KB to 128KB flash
Peripherals – USB OTG and CAN 2.0B
I/O – 3.3V, 5V tolerant
Supply Voltage – 2.6 to 3.6V
Package – QFN36, LQFP48, LQFP64, and LQFP100 packages


May be pin compatible with STM32F100 series.

[ataradov]

That sounds lire the first actually usable RISC-V MCU.

Would be nice to have dev kit available from sellers on more approachable platforms. I would definitely get one.

[ebclr]

"Would be nice to have dev kit available from sellers on more approachable platforms. I would definitely get one."

many available

https://gd32.tmall.com/category.htm?spm=a220o.1000855.w4010-18883888930.2.3a7b676eMpeEuQ&search=y

[ataradov]

Yeah, but you need to read Chinese. And probably give them your credit card. And I'd rather not.

Hopefully someone will sell them on eBay or Aliexpress.

[bilibili]

here is link of datasheet and SDK
Bumblebee_Core_Doc

GD32VF103_User_Manual_EN_V1.0.pdf 
GD32VF103_Datasheet_Rev1.0.pdf   

[bilibili]

RISC-V CPU target for embedded applications that require low energy consumption and small
area, which is compliant to RISC-V architecture with several efficient micro-architecture
features, including simple dynamic branch prediction, instruction pre-fetch buffers and local
memories. It supports 32 general purpose registers (GPRs) and fast multiplier for
performance/area tradeoff:

• RISC-V compliant little-endian RV32IMAC (32GPRs) ;
• Configurable 2-stage pipeline optimized for low gate-count and high frequency;
• Machine (M) and User (U) Privilege levels support;
• Single-cycle hardware multiplier and Multi-cycles hardware divider support;
• Misaligned load/store hardware support;
• Atomic instructions hardware support;
• Non-maskable interrupt (NMI) support;
• Dynamic Branch Prediction and instruction pre-fetch buffers to speed up control code;
• State-of-the-art micro-architecture design to tradeoff area and performance requirements;
• WFI (Wait for Interrupt) support;
• WFE (Wait for Event) support;
• Interrupt priority levels configurable and programmable;
• Enhancement of vectored interrupt handling for real-time performance;
• Support interrupt preemption with priority ;
• Support interrupt tail chaining;
• Standard 4-wire JTAG debug port
• Support interactive debug functionalities
• Support 4 triggers for hardware breakpoint

[SiliconWizard]

Would be nice to have models with more RAM too.

[hansd]

here is link of datasheet and SDK
Bumblebee_Core_Doc

GD32VF103_User_Manual_EN_V1.0.pdf 
GD32VF103_Datasheet_Rev1.0.pdf

Where can you buy the evaluation boards?

[GromBeestje]

Where can you buy the evaluation boards?

It seems at the moment only on the Chinese market, so to get it elsewhere you'll need a service like yoybuy.com

[ebclr]

why you trust eBay and don't Chinese stores, there is much secure than in us, crime there is the death penalty, and you can use Paypal, You are kidding about can't read Chinese in today's world you can read any language, with few keystrokes. The Chinese online stores ( Alibaba group ) are much more reliable than eBay, any seller is required to make a huge deposit just to solve future claims, The risk is much lower

[Monkeh]

why you trust eBay and don't Chinese stores, there is much secure than in us, crime there is the death penalty

Oh my, that's hilarious on so many levels..

You are kidding about can't read Chinese in today's world you can read any language, with few keystrokes.

If it were that easy your English wouldn't be so awful.

There are those of us who don't wish to spend three hours figuring out what's happening on a website half in the wrong language and half extraordinarily poorly translated by machine, just to order some cheap parts. And we don't accept that random stores in another country are secure when said country is rife with crime from the top down.

[wilfred]

If it were that easy your English wouldn't be so awful.

A bit of self moderation is in order when making comments like this.

[Monkeh]

If it were that easy your English wouldn't be so awful.

A bit of self moderation is in order when making comments like this.

It was not intended to be nasty, only to make a point.

If automatic translation was reliable, one would not need to learn other languages - you'd just use a translator.

I apologise for any feelings hurt.

[westfw]

I trust AliExpress over eBay, for tech stuff.
(After all, afaict, eBay is usually some less-technical reseller selling AliExpress goods, anyway.?)


I’m not willing to order from a site where I can’t accurately read the language, though.


Either these chips will show up on a more monolingual-friendly site, eventually, or they’re not worth the trouble.  If Baite, or one of the other cluefull vendors starts selling them, I’m in!

[hansd]

Either these chips will show up on a more monolingual-friendly site, eventually, or they’re not worth the trouble.  If Baite, or one of the other cluefull vendors starts selling them, I’m in!
[/quote]

Segger supports them in their RISC V Embedded Studio.

[emece67]

.

[bilibili]

GD32VF103C-START

70RMB/10$ including onboard debugger

[Sal Ammoniac]

And probably give them your credit card. And I'd rather not.

Doesn't your credit card company give you the option of generating one time use numbers? Mine does, and I always use this when ordering something from a potentially dodgy site on the Internet. My CC company lets me generate a one-time number with a fixed credit limit (I usually set it to $1 higher than whatever I'm ordering) and an expiration date of next month.

[Sal Ammoniac]

If it were that easy your English wouldn't be so awful.

A bit of self moderation is in order when making comments like this.

Oh, yes, I forgot... Political correctness trumps all these days. My bad.

Frankly, I'm glad to see someone (Monkeh) call a spade a spade.

[emece67]

.

[SiliconWizard]

Is the "F103" codename pure coincidence though?

[lucazader]

Is the "F103" codename pure coincidence though?

Nope.
Another product line that they have released in the past was the GD32F103. And these were basically pin for pin compatible with the STM32. And they were also mostly register and binary compatible, with a few exceptions...

[thm_w]

I checked the LQFP48 pinout and it matches up, so theoretically you can drop this thing into an existing board design for STM32F103, once you figure out the code of course.

This is really smart, first the F103 clone for a lower price to build trust/brand, then this. AFAIK there haven't been any major issues with that design, but I don't know if anyone has done in depth characterizations.

[westfw]

Doesn't your credit card company give you the option of generating one time use numbers? Mine does, and I always use this when ordering something from a potentially dodgy site on the Internet. My CC company let's me generate a one-time number with a fixed credit limit (I usually set it to $1 higher than whatever I'm ordering) and an expiration date of next month.

I've never heard of such a capability!  Sounds neat.
Who is "your credit card company"?

Edit: Hmm:  Capital One, Citi, Bank of America offer disposable card numbers  on *some* cards...

[SiliconWizard]

I checked the LQFP48 pinout and it matches up, so theoretically you can drop this thing into an existing board design for STM32F103, once you figure out the code of course.

This is really smart, first the F103 clone for a lower price to build trust/brand, then this. AFAIK there haven't been any major issues with that design, but I don't know if anyone has done in depth characterizations.

Does it have a similar set of peripherals as well?

Yeah, I guess if a company is producing millions a year of devices using a STM32F103, they could justify the time investment in porting the software to this new chip, and then it would just be a matter of changing a single item in the BOM...

Not very fair to STM, but hey. Who said business was fair, right?