Build instructions for Ubuntu: 0) apt-get install cmake gcc-arm-none-eabi libnewlib-arm-none-eabi 1) export ARMGCC_DIR=/usr cd ../KSDK_1.2.0/lib/ksdk_platform_lib/armgcc/KL27Z4 ./build_all.sh cd - 2) cd ../KSDK_1.2.0/usb/usb_core/device/build/armgcc/usbd_sdk_frdmkl27z_bm ./build_all.sh cd - 3) ./build_debug.sh -DBADGE_V=2 -or- ./build_release.sh -DBADGE_V=2 or -DBADGE_V=1 for V1 hardware Load instructions Kinetis Bootloader: 0) Download the Kinetis Bootloader[0]. (registration required) 1) Extract that huge zip and find the blhost executable for your OS in the bin directory. 2) Boot your badge into the ROM boot-loader by holding the direction pad UP while pressing reset. 3) It should show up as a USB-HID device. 4) Execute: blhost -u -- flash-erase-region 0 0x20000 blhost -u -- write-memory 0 hello_world.bin 5) Load graphics if desired: blhost -u -- flash-erase-region 0x20000 0x7800 blhost -u -- write-memory 0x20000 aha.im1 blhost -u -- write-memory 0x21800 dc24.im1 blhost -u -- write-memory 0x23000 my_name_is.im1 blhost -u -- write-memory 0x24800 longhorn_lockpicking.im1 blhost -u -- write-memory 0x26000 threatbutt.im1 6) Reset the badge or: blhost -u -- reset Load instructions for openocd: 0) openocd in another terminal: telnet localhost 4444 reset halt 1) in another terminal: gdb-multiarch -x gdb.init debug/hello_world.elf gdb) load gdb) monitor reset Creating graphics: 0) V1: Create a 232 x 128 black and white (not greyscale) image V2: Create a 264 x 176 black and white (not greyscale) image 1) Use gimp to convert it to "SUN Rasterfile image" with the extension .im1 2) Choose Standard Data Formatting, not RunLength Encoded Load images with dd: 0) Plug the badge in to your computer's USB port 1) Note the five USB drives that appear 2) dd (on Linux/BSD/OSX?) or rawrite (on Winblows) images to those drives Example: dd if=image0.im1 of=/dev/sdb dd if=image1.im1 of=/dev/sdc dd if=image2.im1 of=/dev/sdd dd if=image3.im1 of=/dev/sde dd if=image4.im1 of=/dev/sdf [0] https://www.nxp.com/kboot