![]() Test and verify your layoutīefore compiling a firmware using your newly created vial.json file, it is highly encouraged to test that the file displays and behaves as expected first, since a technically correct file with a complete but perhaps visually incorrect layout will not be handled by the compiler. See here for an example of a keyboard definition JSON with multiple layout options. You do not have to add them, and even if you do, their contents will not be used name, vendorId, productId: while these options are required by VIA, Vial does not need them. ![]() keymap: paste the full contents of KLE JSON you’ve downloaded in the previous step after the colon symbol.If your keyboard does have layout options, make sure to terminate this line with a comma labels: layout options array described above goes here if your keyboard does not have any layout option, you should delete this line. ![]() cols: similarly, this value should match MATRIX_COLS.rows: enter the number of rows your keyboard has, this value should match MATRIX_ROWS you have in config.h.For example, let’s take a look at m0110_usb: If the keyboard already has a QMK port, you can follow the LAYOUT macro in order to assign rows and columns to the keys in the KLE. There are two ways to prepare this data: either from the keyboard PCB and schematic files, or from the QMK layout macro. The top-left legend of every key is used to identify its position in the matrix, encoded as row,col. Next, you will need to correlate physical keyboard layout to the switch matrix. Use the “Tools -> Remove Legends” action in order to clean up any existing legends: Go to and create a layout that physically represents your keyboard. Keyboard definition layouts are based on KLE data with additional information encoded within keys’ legends. Prepare keyboard layout Create a physical layout ![]() Copying/renaming one to the other does NOT work. The file structure and content of info.json and vial.json is vastly different. Otherwise, follow the steps as described below. If your keyboard already has a VIA port, you can download its keyboard definition from the VIA repository and proceed directly to the second step: adding Vial support. The first step for creating a Vial port is to prepare a keyboard definition which is a JSON file describing the layout of the keyboard. You can check them out at vial-qmk/keyboards/vial_example. Vial-qmk provides several examples of most common microcontroller configurations set up for Vial usage. ![]()
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