Merrii Hummingbird A31

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Merrii Hummingbird A31
Hummingbird A31 Top.jpg
Manufacturer Merrii
Dimensions 160 mm x 100 mm
Release Date June 2014
Website Device Product Page
Specifications
SoC A31 @ 1Ghz
DRAM 1GiB/2GiB DDR3 @ 312MHz
NAND 8/16GB
Power DC 12V @ 3A
Features
Video HDMI (Type A - full), VGA, TV IN
Audio 3.5mm headphone plug, 3.5mm line-in plug, HDMI, on-board microphone
Network WiFi 802.11 b/g/n + BT (AP6210), 10/100/1000Mbps Ethernet (Realtek RTL8211(E?))
Storage µSD
USB 2 USB2.0 Host, 1 USB2.0 OTG

Identification

The board reads "Quad-Core HummingBird Kit"

The board comes with Android 4.2.2 (3.3.0 kernel) preloaded in the NAND.

  • Model Number: Softwinner
  • Build Number: fiber_3g-eng 4.2.2 JDQ39 20140521 test-keys

Sunxi support

Current status

The Hummingbird A31 is only partially supported.


Images

HW-Pack

BSP

Manual build

No support in the community maintained sunxi-3.4 kernel is planned. Please skip to the next Mainline U-Boot/Mainline kernel sections.

Mainline U-Boot

Supported in the mainline u-boot git 'master' branch and scheduled for the v2015.04 release.

For building mainline u-boot, use the Hummingbird_A31 target.

Mainline kernel

Mainline kernel support is included in 3.17. Currently only UARTs, USB, I2C, and GMAC are supported. HDMI/VGA display is support with the latest mainline u-boot using simplefb.

Use the sun6i-a31-hummingbird.dtb device-tree file for the mainline kernel.

Tips, Tricks, Caveats

FEL mode

The UBOOT button triggers FEL mode. See BROM for more information on the boot sequence.

VGA out

The Hummingbird A31 uses an external DAC (GM7123), numbered U6 on the board, to convert output from LCD0 (TCON0) to RGB.

No configuration is required, other than enabling power to the chip, using GPIO PH25.

Note: DDC is not supported.

TV In

The Hummingbird A31 uses a low power TV decoder chip for TV in. The chip's output is connected to CSI on the PE pin group. It is controlled via I2C on TWI0. Power is controlled with GPIO PH26.

Datasheet

GM7150 datasheet (CN) (pdf, 38 pages)

Expansion Ports

The Hummingbird A31 exposes 2 2.54 mm pitch connectors with lots of expansion possibilities.

J4 "TO LCD Board" (Near mini PCIe slot)
2x60 Header
1 VCC-5V 2 VCC-5V
3 VCC-5V 4 GND
5 GND 6 GND
7 GPIO-PD1-LCD-D1-LVDS0-VN0 8 GPIO-PD0-LCD-D0-LVDS0-VP0
9 GPIO-PD3-LCD-D3-LVDS0-VN1 10 GPIO-PD2-LCD-D2-LVDS0-VP1
11 GPIO-PD5-LCD-D5-LVDS0-VN2 12 GPIO-PD4-LCD-D4-LVDS0-VP2
13 GND 14 GND
15 GPIO-PD7-LCD-D7-LVDS0-CLKN 16 GPIO-PD6-LCD-D6-LVDS0-CLKP
17 GPIO-PD9-LCD-D9-LVDS0-VN3 18 GPIO-PD8-LCD-D8-LVDS0-VP3
19 GPIO-PD11-LCD-D11-LVDS1-VN0 20 GPIO-PD10-LCD-D10-LVDS1-VP0
21 GPIO-PD13-LCD-D13-LVDS1-VN1 22 GPIO-PD12-LCD-D12-LVDS1-VP1
23 GPIO-PD15-LCD-D15-LVDS1-VN2 24 GPIO-PD14-LCD-D14-LVDS1-VP2
25 GND 26 GND
27 GPIO-PD17-LCD-D17-LVDS1-CLKN 28 GPIO-PD16-LCD-D16-LVDS1-CLKP
29 GPIO-PD19-LCD-D19-LVDS1-VN3 30 GPIO-PD18-LCD-D18-LVDS1-VN3
31 GPIO-PD21-LCD-D21 32 GPIO-PD20-LCD-D20
33 GPIO-PD23-LCD-D23 34 GPIO-PD22-LCD-D22
35 GPIO-PD24-LCD-CLK 36 GPIO-PD25-LCD-DE
37 GPIO-PD27-LCD-VSYNC 38 GPIO-PD26-LCD-HSYNC
39 GPIO-PH27-LCD-BL-EN 40 GPIO-PH13-PWM0
41 GPIO-PC27-LCD-PWR-EN 42 GPIO-PA24-TP-WAKEUP
43 TP-X1 44 GPIO-PA23-TP-INT
45 TP-X2 46 GPIO-PH16-TWI1-SCK
47 TP-Y1 48 GPIO-PH17-TWI1-SDA
49 TP-Y2 50 VCC-3V
51 DSI-D0P (MIPI) 52 DSI-D0N (MIPI)
53 DSI-D1P (MIPI) 54 DSI-D1N (MIPI)
55 DSI-D2P (MIPI) 56 DSI-D2N (MIPI)
57 DSI-D3P (MIPI) 58 DSI-D3N (MIPI)
59 DSI-CKP (MIPI) 60 DSI-CKN (MIPI)
J11 (Near USB Ports)
2x60 Header
1 VCC-5V 2 VCC-5V
3 VCC-3V 4 VCC-3V
5 GPIO-PE0-CSI-PCLK 6 GPIO-PH14-CSI-SCK (TWI0)
7 GPIO-PH15-CSI-SDA (TWI0) 8 GPIO-PE3-CSI-VSYNC
9 GPIO-PE2-CSI-HSYNC 10 GPIO-PE1-CSI-MCLK
11 GPIO-PE8-CSI-D4 12 GPIO-PE9-CSI-D5
13 GPIO-PE10-CSI-D6 14 GPIO-PE11-CSI-D7
15 GPIO-PE12-CSI-D8 16 GPIO-PE13-CSI-D9
17 GPIO-PE14-CSI-D10 18 GPIO-PE15-CSI-D11
19 GND 20 GND
21 CAM-RESET# 22 GPIO-PH28-CAM-STBY-EN
23 CSI-1V5 24 CSI-1V8
25 GPIO-PE7-CSI-PWREN 26 AFVCC-2V8
27 GPIO-PE6-CSI-AF-IO 28 CSI-2V8
29 GND 30 GND
31 CSI2-D0N (MIPI) 32 CSI2-D0P (MIPI)
33 CSI2-D1N (MIPI) 34 CSI2-D1P (MIPI)
35 CSI2-D2N (MIPI) 36 CSI2-D2P (MIPI)
37 CSI2-D3N (MIPI) 38 CSI2-D3P (MIPI)
39 CSI2-CKN (MIPI) 40 CSI2-CKP (MIPI)
41 MIPI-CSI-MCLK 42 GND
43 GND 44 GPIO-PH18-TWI2-SCK
45 GPIO-PE6-UART5-RX 46 GPIO-PH19-TWI2-SDA
47 GPIO-PE5-UART5-TX 48 GPIO-PH9-SPI2-CS0
49 GPIO-PA6-UART1-RTS 50 GPIO-PH10-SPI2-CLK
51 GPIO-PA7-UART1-CTS 52 GPIO-PH11-SPI2-MOSI
53 GND 54 GPIO-PH12-SPI2-MISO
55 GPIO-PA5-UART1-RX 56 GPIO-PM4
57 GPIO-PA4-UART1-TX 58 GPIO-PM5
59 VCC-3V 60 GPIO-PM6

Adding a serial port

UART pins

The UART header is right next to the NAND chip and IR receiver. Just attach some leads according to our UART howto.

Pictures

Also known as

See also