gpio

Posted on by Jean-Luc Aufranc (CNXSoft) - 44 Comments on Status of Orange Pi Boards GPIO Support

Status of Orange Pi Boards GPIO Support

Yesterday, one person asked me to make a video showing GPIO control on Orange Pi 2 mini on YouTube, and since I have just completed a post about Orange Pi camera, I thought it might be fun to check GPIO support too. This post focuses on Allwinner H3 boards, but the instructions and status should be very similar for Allwinner A20 and A31s versions. One of the first things you want before starting playing with GPIOs is the expansion header’s pinout chart, and I could not find any until I had the idea to check for schematics, which are available on Orange Pi resources page. I downloaded the schematics for Orange Pi 2, which should be the same as for Orange Pi 2 mini as the only difference is the lack of WiFi module. Orange Pi PC is a little different, and the schematics are nowhere to be found, but […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 20 Comments on Add GPIOs to Windows, Linux, Android Computers and Devices with FTDI USB Adapters / Breakout Boards

Add GPIOs to Windows, Linux, Android Computers and Devices with FTDI USB Adapters / Breakout Boards

It’s possible to to add GPIOs to your computer, (openWRT) router, or Android tablet using some FTDI USB dongles that expose I/Os. On operating systems based on Linux, including Android, you can use the GPIO sysfs interface (/sys/class/gpio) to easily control GPIOs from the command line, and in some cases Rx, Tx, CTS, .. pins can also be used as GPIOs. Zoobab has tried it with various FTDI USB adapters, and Oneping OP-1010 breakout board based on PL2303 HDX chip, and the results are mixed, but it could worth a try. There are currently patchsets ([1] and [2]) awaiting acceptance to mainline kernel that will enable GPIO support for these USB devices, but in the meantime you need to patch the kernel yourself, and then enable the relevant options in the kernel config for example “USB_SERIAL_PL2303_GPIO” or “USB_SERIAL_FTDI_SIO_GPIO”. The first patch is for PL2303 chips, and the second for FT2xxx/FT4xxx […]

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