Sipeed Longan Nano v1.1- RISC-V GD32VF103CBT6 Development Board
As an updated version to Sipeed Longan Nano, the Sipeed Longan Nano V1.1 development board has been modified the pin definitions of headers and board outline by us. Also, for looking tidy, we gifted it a new shell. The board is based on GD32VF103CBT6 MCU with the RISC-V 32-bit core of GigaDevice.
- Chip built-in 128KB Flash, 32KB SRAM
- 4 x general purpose 16-bit timer, 2 x basic 16-bit timer, 1 x advanced 16-bit timer
- Watchdog, RTC, SysTick
- 3 x USART, 2 x I2C, 3 x SPI, 2 x I2S, 2 x CAN, 1 x USBFS (OTG)
- 2 x ADC (10 channel), 2 x DAC
Sipeed Longan Nano v1.1 is an updated development board based on the GD32VF103CBT6 MCU chip which has built-in 128KB Flash, 32KB SRAM. It is convenient for students, engineers, and geek enthusiasts to tinker with the new-generation RISC-V processors. GD32VF103CBT6 is a Bumblebee core, based on Nuclei System Technology supporting RV32IMAC instruction set and ECLIC fast interrupt function. Meanwhile, it costs only 1/3 of that of traditional Cortex-M3.
There can be multiple timer modules on the given device, e.g., four general-purpose 16-bit timers, two basic 16-bit timers, and one advanced 16-bit timer. More specifically, it has a watchdog timer to monitor the main program, an RTC(Real-time clock) to provide stable clock signals, and a SysTick(System tick timer) to maintain the main system working.
Longan Nano v1.1 development board has 28 GPIOs connected to the row pins which is so convenient that it can support connecting lots of devices. And it can be reset anytime by the Reset Button and the BOOT button. 160x80 RGB IPS LCD can be connected to its SPI screen interface. Also, it has an on-board 8M passive crystal oscillator, 32.768 kHz RTC low-speed crystal oscillator, TF Card Holder, 1 RGB LED, and uses a Type-C USB interface.
Longan Nano v1.1 supports multiple download methods, e.g., USB DFU download, UART ISP download, and JTAG download. By USB DFU download mode, you only need a USB Type-C cable to download the program to the development board. Longan Nano v1.1 supports the standard JTAG interface, which means it can debug online using the in-store RISC-V debugger or any JTAG-enabled debugger such as J-Link.
Furthermore, Sipeed has adapted the PlatformIO IDE for the Longan Nano development board, which can be visually developed on multiple platforms such as Windows/Linux:
- Smart Timer
- Smart Meteorograph
|CPU||GD32VF103CBT6 based on RISC-V 32-bit core|
|Kernel power consumption||Only 1/3 of the traditional Cortex-M3|
|Storage||128KB Flash, 32KB SRAM|
|Peripheral||● 4 x general-purpose 16-bit timer, 2 x basic 16-bit timer, 1 x advanced 16-bit timer
● Watchdog, RTC, Systick
● 3x USART, 2 x I2C, 3 x SPI, 2 x I2S, 2 x CAN, 1 x USBFS (OTG), 2 x ADC (10 channel), 2 x DAC
|Button||1 Reset Button and 1 BOOT button（Connected to GPIO）|
|Screen interface||SPI interface （160x80 RGB IPS LCD can be connected）|
|Storage interface||Onboard TF Card Holder|
|Debug interface||2x4 pin leads out JTAG debugging interface and serial port|
|Crystal oscillator||8MHz passive crystal oscillator + 32.768KHz RTC crystal oscillator|
|LED||Onboard 1 RGB LED|
|GPIO||28 GPIOs have been connected to the row pins|
|IDE||PlatformIO IDE, Support debugging, Arduino|
|Compile Toolchain & Debugger||GCC, OpenOCD|
|Operating system||RT-Thread, LiteOS|
|External power supply||TYPE-C: 5V±10% 0.5A|
|-10℃ ~ 65℃|
- 1 x Sipeed Longan Nano v1.1 Development Board
- 1 x 0.96inch 160x80 IPS RGB LCD
LEARN AND DOCUMENTS
SHARED BY USERS
from order viewThe Longan Nano v1.1 is a noticeable improvement over the v1.0, which I also have. The v1.1 casing is much nicer than the old one. It came pre-assembled, whereas I had to manually assemble the casing for v1.0. The case now is screwed shut, and a little bit slimmer than before. The debug header pins don't protude the case anymore. The display is non-glossy, and the case has internal posts for display alignment, so the display sits perfectly, where the v1.0 required you to manually position the display correctly. The microSD-slot is now a full-featured one, where the card clicks in place, and can be released by another push. In the old version, the card just slid in to the minimal connector and could only be released by opening the casing and pulling the card out. The dark-tinted new case also looks better.
Apart from those points, it seems everything else did not change. The pin rows are now contiguous (no "hole" in the middle of the row anymore), but the pinout (ordering) looks the same. Breadboard designs for the old one might need to be fixed for this new version due to this (moving over half of the pins by 1 hole).
The Documentation gets only 3 stars. It is a mixed bag, coming from nucleisys (for the bumblebee core, very bad documentation), from gigadevice (for the GD32VF103 MCU, reasonably good), and from sipeeed (for the longan nano board, very sparse quickstart for platformio.)
The "Bumblebee core datasheet" is almost useless. The table of contents is not actually linked to the pages. Actually almost nothing is linked to other parts of the pdf, and what has a link (figure references), does not always link to the correct target, but sometimes to the revision history. The font sizes are all over the place (up to REALLY HUGE), which doesn't make any sense. Almost no figures, and text in some of the figures is chinese only. Some pages have two different page numbers on them (page 11 & page 20)???!?
Hopefully the GigaDevice MCU Documentation will give me all the information I need, because if I had to understand the content of the nucleisys I'd be lost.