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# Programming ATSAMD51J18 with OpenOCD
To get an idea, see [this tutorial](http://omzlo.com/articles/programming-the-samd21-using-atmel-ice-with-openocd-(updated)).
Unfortunately, the current version of OpenOCD (0.10.0) does not ship a patch
that is needed to work properly with the ATSAMD51J18.
This means, you may have to compile your own patched version of openocd.
## Get openocd and patch it
We need [this patch](http://openocd.zylin.com/#/c/4272/).
The code below takes care of downloading and applying it.
```
git clone http://git.code.sf.net/p/openocd/code openocd
cd openocd
git fetch http://openocd.zylin.com/openocd refs/changes/72/4272/5 && git checkout FETCH_HEAD
```
## Compile and install it
You will need a few dependencies / tools. Under Ubuntu 16, you can install most of them with:
```
sudo apt install autoconf build-essential cmake gdb-arm-none-eabi libtool libtool-bin libhidapi-dev libusb-dev libusb-1.0-0-dev pkg-config
```
If you don't want it under `/usr/local`, change the prefix in the configure command below.
```
./bootstrap
./configure --prefix=/usr/local --enable-aice --enable-amtjtagaccel --enable-armjtagew --enable-cmsis-dap --enable-dummy --enable-ftdi --enable-gw16012 --enable-jlink --enable-jtag_vpi --enable-opendous --enable-openjtag_ftdi --enable-osbdm --enable-legacy-ft2232_libftdi --enable-parport --disable-parport-ppdev --enable-parport-giveio --enable-presto_libftdi --enable-remote-bitbang --enable-rlink --enable-stlink --enable-ti-icdi --enable-ulink --enable-usb-blaster-2 --enable-usb_blaster_libftdi --enable-usbprog --enable-vsllink
make -j8
make install
```