Extract uhk.switchKeymap()

packages/usb/switch-keymap.js

@@ -1,9 +1,8 @@
 #!/usr/bin/env node
 const uhk = require('./uhk');
 
+(async function() {
     const device = uhk.getUhkDevice();
-const sendData = Buffer.concat([new Buffer([uhk.usbCommands.switchKeymap, 3]), new Buffer('TES')]);
+    const sendData = await uhk.switchKeymap(device, 'TES');
     console.log(sendData)
-device.write(uhk.getTransferData(sendData));
+})();
-const response = Buffer.from(device.readSync());
-console.log(response);

packages/usb/uhk.js

@@ -206,6 +206,12 @@ async function jumpToModuleBootloader(device, moduleSlotId) {
     await uhk.writeDevice(device, [uhk.usbCommands.jumpToModuleBootloader, moduleSlotId]);
 };
 
+async function switchKeymap(device, keymapAbbreviation) {
+    const keymapAbbreviationAscii = keymapAbbreviation.split('').map(char => char.charCodeAt(0));
+    const payload = [uhk.usbCommands.switchKeymap, keymapAbbreviation.length, ...keymapAbbreviationAscii];
+    return await uhk.writeDevice(device, payload);
+}
+
 async function waitForKbootIdle(device) {
     const intervalMs = 100;
     const pingMessageInterval = 500;
@@ -279,6 +285,7 @@ uhk = exports = module.exports = moduleExports = {
     reenumerate,
     sendKbootCommandToModule,
     jumpToModuleBootloader,
+    switchKeymap,
     waitForKbootIdle,
     updateModuleFirmware,
     usbCommands: {