RISC-V

Sipeed Longan GD32VF103CBT6 MCU Nano RISC-V Development Board.

• The GD32VF103 MCU series adopts the new Bumblebee processor core based on the open source RISC-V instruction set architecture and is jointly developed by GigaDevice and Nuclei System Technology, offering a commercial RISC-V processor core for IoT and ultra-low power applications.
  
  More information about the GD32VF103 can be found at:
  https://www.gigadevice.com/products/microcontrollers/gd32/risc-v/.
  
  The electronics company Sipeed developed the Longan GD32VF103CBT6 MCU Nano RISC-V Development Board.
  
  
  
  
  
  
  
  
  
  
  
  The metal micro SD housing is slightly curved.
  Use a small flat screwdriver to bent it slightly back otherwise the micro SD card can not be inserted. Do not make the gap too large! The micro SD card must be CLAMPED by the metal housing. WARNING! I have bent it too far, one of the pins inside the metal housing did not make contact with the micro SD card and the animation did not work. I pressed the housing back and that solved the problem.
  
  The micro SD card was FAT32 formatted.
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  IC markings were difficult to capture:
  GD32VF103CBT6
  AEP6833
  AJ1942
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  To detach the plastic conductive TFT display foil from the board, first flip the lid from the mini TF card slot.
  
  
  
  Lid is open and the plastic conductive TFT display foil is detached from the board.
  
  
  
  Insert the plastic conductive TFT display foil approx. 1.5 mm, and close the lid.
  
  
  
  The Sipeed Longan Nano is a GD32VF103CBT6 based minimal development board based on GigaDevice's latest RISC-V 32-bit core microcontroller.
  
  In the heart of Longan Nano is a GigaDevice's GD32VF103CBT6, based on Nuclei System Technology Bumblebee kernel (support RV32IMAC instruction sets and ECLIC rapid interrupt).
  
  The chip has built-in 128KB Flash, 32KB SRAM, and peripherals listes below:
  • 4 x universal 16-bit timer
  • 2 x basic 16-bit timer
  • 1 x advanced 16-bit timer
  • Watchdog timer
  • 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
  
  The Longan Nano development board is breadboard friendly. It has onboard 8 MHz passive crystal, 32.768KHz RTC low-speed crystal, mini TF card slot, and use the latest type-C USB interface.
  
  
• Color TFT Display LH096TIF09:
  Size: 0.96 inch
  Resolution: 160 x 80
  Control chip: ST7735
  Display area: 10.8 x 21.7 mm
  
  Physical size: 13.5 x 27.95 x 1.5 mm
  Interface Type: SPI
  Number of pins: 8
  Working voltage: 1.65-3.3V
  Operating temperature: (-20 °C - +70 °C)
  Storage temperature: (-30 °C - +80 °C)
  Back light: 1 white LED: 20 mA, 3.0V
  
  
  
  
  
  
• Sipeed Longan Nano pin layout
  
  Click the image to enlarge.
  
  
  
  
• Check if the Sipeed Longan Nano is working
  • Connect the Sipeed Longan Nano to your computer using the USB-A - USB-C cable.
    
    
  • The TFT display (if connected) is white and the RGB led is blinking (red, green, blue).