add schematic pdfs and firmware code

Code/devterm_keyboard/devterm.h

@@ -0,0 +1,29 @@
+#ifndef DEVTERM_H
+#define DEVTERM_H
+
+
+#include <USBComposite.h>
+
+typedef struct keyboard_state{
+
+  uint8_t layer;
+  uint8_t shift;
+  uint8_t caps_lock;
+  
+}KEYBOARD_STATE;
+
+class DEVTERM {
+  public:
+    HIDKeyboard *Keyboard;
+    HIDMouse *Mouse; 
+    HIDJoystick *Joystick;
+    KEYBOARD_STATE Keyboard_state;
+    USBCompositeSerial *_Serial;
+    //if not to use USBCompositeSerial,then use default Serial
+    //**Serial and USBCompositeSerial can not use together, otherwise the keyboard firmware uploading will be dead**
+    //and you will need to find a way out to flash the stm32duino bootloader once again
+    //USBSerial *_Serial;//_Serial = &Serial;
+};
+
+
+#endif