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SSH

login as: biqu
password: biqu

OS image

  • The latest system image is here
  • The source code is here

V2.3.0 OS Setting

WIFI Settings

  • After the OS writes to the SD card, there is a FAT32 partition named BOOT, open system.cfg file with Notpad, Notpad++ or VSCode.

  • Set WIFI_SSID as your actual wifi name and WIFI_PASSWD as your actual wifi password, The space character can be parsed normally without additional escape character.
    For example: WIFI_SSID="CB1 Tester"

Overlays Settings

  • After the OS writes to the SD card, there is a FAT32 partition named BOOT, open BoardEnv.txt file with Notpad, Notpad++ or VSCode.

  • Set as required as shown in the figure below.
    • set fdtfile to sun50i-h616-biqu-emmc for CB1 eMMC version, set fdtfile to sun50i-h616-biqu-sd (default value) for CB1 normal version
    • The default value is console=display, This means that the UART0 of CB1 is used as the debugging port by default. We can use MobaXterm to connect to CB1 by UART0 and debug. If klipper wants to use UART0 to control the motherboard, we need to set it to console=serial, now klippe can use UART0 as /dev/ttyS0.
    • CB1 will automatically identify the HDMI resolution, but if your HDMI screen cannot report the resolution through the EDID normally, we can forcibly specify the resolution of CB1 output by uncomment extraargs=video and set the actual resolution.
      For example:
      BTT-HDMI7 resolution = 1024x600: extraargs=video=HDMI-A-1:1024x600-24@60
      BTT-HDMI5 resolution = 800x480: extraargs=video=HDMI-A-1:800x480-24@60
    • Uncomment overlays=tft35_spi to enable TFT35 SPI screen.
    • Uncomment overlays=mcp2515 to enable MCP2515 spi to canbus module (Theoretically, it can be multiplexed with tft35_spi and 'spidev1.2' at the same time, but mcp2515 needs strong real-time, it is better not to enable other SPI1 features when using mcp2515).
    • uncomment overlays=spidev1_2 to release 'spidev1.2' to user space (For example: adxl345), spidev1.0 is used by MCP2515, spidev1.1 is used by tft35_spi.

  • NOTE: TFT35 SPI and MCP2515 multiplex a group of SPI1 
    SPI1_CLK=PH6
SPI1_MISO=PH8
SPI1_MOSI=PH7
TFT35_SPI_CS=PC7
MCP2515_CS=PC11
MCP2515_IRQ=PC9

CB1 eMMC Version

NOTE: The CB1 eMMC version can also use the SD card as the OS image source, and the priority of the SD card is higher than on-board eMMC, so when using the eMMC, remember not to insert the OS SD card

  1. Download the utility sunxi-fel to your computer (Mac OS is not supported) and download the CB1 driver For windows download sunxi-fel.exe For linux download sunxi-fel-aarch64 For arm download sunxi-fel-armhf

  2. Push the DIP switch (USB OTG) and (RPI BOOT) to ON to enter BOOT mode.
    As shown in the following figure is for PI4B_Adapter.
    For other motherboards, refer to the CM4 eMMC part of the motherboard manual to set the switch.
    For some motherboards (e.g. Manta-E3EZ, Manta-M8P-V1.1, Manta-M5P) with OTG/UART selector switch for Type-C, we also need to set the switch to OTG mode according to motherboard's manual

  3. USB driver for windows (Linux skip this step): refer to the official website of AllWinner

    • Download Zadig to the rescue
    • Enable Options->List All Devices

    • Select the USB device to install the driver(most likely will be "unknown"). Make sure the device USB ID is "1F3A:EFE8"). Click Install Driver after confirming that the information is correct

  4. Open the Powershell(windows) or console terminal(linux) where you downloaded the sunxi-fel tools and CB1 driver in step 1.

  5. Run
    .\sunxi-fel.exe -v ver (windows)
    sudo ./sunxi-fel-armhf -v ver (linux-armhf)
    sudo ./sunxi-fel-aarch64 -v ver (linux-aarch64)
    to check whether the USB of CB1 is connected normally.
    If you get ERROR: Allwinner USB FEL device not found! means that the USB is not recognized. Please recheck whether the driver is installed successfully.
    If you get AWUSBFEX soc=00001823(H616) means that CB1 eMMC is ready.

    Here on the first line is an example of error you will see if the driver did not install correctly. On the second line is an example of what it will look like after zadig has installed the driver correctly.

  6. Run
    .\sunxi-fel.exe uboot .\u-boot-sunxi-cb1-emmc.bin (windows)
    sudo ./sunxi-fel-armhf uboot ./u-boot-sunxi-cb1-emmc.bin (linux-armhf)
    sudo ./sunxi-fel-aarch64 uboot ./u-boot-sunxi-cb1-emmc.bin (linux-aarch64)
    to write u-boot to CB1

  7. When the uboot is written, the computer will recognize a USB flash disk, and then you can use balenaEtcher or Raspberry Pi Imager to write the OS image to eMMC. The steps are the same as the SD card version.

  8. Refor to Overlays Settings to set fdtfile to sun50i-h616-biqu-emmc

40 Pin GPIO

Pin BTT Pi CB1 eMMC CB1 CM4 CM4 CB1 CB1 eMMC BTT Pi Pin
Signal Description Signal Description Signal Description Signal Description Signal Description Signal Description Signal Description Signal Description
1 3.3V 3.3V 3.3V 3.3V 5V 5V 5V 5V 2
3 PC3 GPIO67 NC NC GPIO2 I2C1 SDA 5V 5V 5V 5V 4
5 PC0 GPIO64 NC NC GPIO3 I2C1 SCL GND GND GND GND 6
7 PC7 GPIO71 PI14 GPIO170 PC7 GPIO71 GPIO4 GPCLK0 GPIO14 UART TX PH0 GPIO224, UART0_TX PH0 GPIO224, UART0_TX PH0 GPIO224, UART0_TX 8
9 GND GND GND GND GPIO15 UART RX PH1 GPIO225, UART0_RX PH1 GPIO225, UART0_RX PH1 GPIO225, UART0_RX 10
11 PC14 GPIO78 PI15 GPIO271 PC14 GPIO78 GPIO17 SPI1 CE1 GPIO18 PCM CLK PC13 GPIO77 PI7 GPIO263 PC13 GPIO77 12
13 PC12 GPIO76 PI6 GPIO262 PC12 GPIO76 GPIO27
GND GND GND GND 14
15 PC10 74 PI4 GPIO260 PC10 GPIO74 GPIO22
GPIO23
PC11 GPIO75 PI5 GPIO261 PC11 GPIO75 16
17 3.3V 3.3V 3.3V 3.3V GPIO24
PC9 GPIO73 PI3 GPIO259 PC9 GPIO73 18
19 PH7 GPIO231, SPI1_MOSI PH7 GPIO231, SPI1_MOSI PH7 GPIO231, SPI1_MOSI GPIO10 SPI0 MOSI GND GND GND GND 20
21 PH8 GPIO232, SPI1_MISO PH8 GPIO232, SPI1_MISO PH8 GPIO232, SPI1_MISO GPIO9 SPI0 MISO GPIO25
NC NC PG13 GPIO205 22
23 PH6 GPIO230, SPI1_CLK PH6 GPIO230, SPI1_CLK PH6 GPIO230, SPI1_CLK GPIO11 SPI0 SCLK GPIO8 SPI0 CE0 NC NC PG12 GPIO204 24
25 GND GND GND GND GPIO7 SPI0 CE1 PG8 GPIO200 PI11 GPIO267 PI9 GPIO265 26
27 PC2 GPIO66 NC NC GPIO0 EEPROM SDA GPIO1 EEPROM SCL PG7 GPIO199 PI10 GPIO266 PI10 GPIO266 28
29 PC4 GPIO68 NC NC GPIO5 GPCLK1 GND GND GND GND 30
31 PI5 GPIO261 PI9 GPIO265 PG6 GPIO198 GPIO6 GPCLK2 GPIO12 PWM0 PG9 GPIO201 PI12 GPIO268 PI6 GPIO262 32
33 PI14 GPIO270 NC NC GPIO13 PWM1 GND GND GND GND 34
35 PC6 GPIO70 PI1 GPIO257 PC6 GPIO70 GPIO19 PCM FS GPIO16 SPI1 CE2 NC NC PG11 GPIO203 36
37 PC15 GPIO79 PI13 GPIO269 PC15 GPIO79 GPIO26
GPIO20 PCM DIN PH10 GPIO234, IR_RX PH10 GPIO234, IR_RX PH4 GPIO228 38
39 GND GND GND GND GPIO21 PCM DOUT PC8 GPIO72 PI2 GPIO258 PC8 GPIO72 40

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