core: NO_KEYBOARD build option

disables USB keyboard interface

tmk_core/common/avr/suspend.c

@@ -115,21 +115,25 @@ void suspend_power_down(void)
 
 bool suspend_wakeup_condition(void)
 {
+#ifndef NO_KEYBOARD
     matrix_power_up();
     matrix_scan();
     matrix_power_down();
     for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
         if (matrix_get_row(r)) return true;
     }
+#endif
     return false;
 }
 
 // run immediately after wakeup
 void suspend_wakeup_init(void)
 {
+#ifndef NO_KEYBOARD
     // clear keyboard state
     matrix_clear();
     clear_keyboard();
+#endif
 #ifdef BACKLIGHT_ENABLE
     backlight_init();
 #endif

tmk_core/common/hook.c

@@ -22,6 +22,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  * Definitions of default hooks
  * ------------------------------------------------- */
 
+__attribute__((weak))
+void hook_main_loop(void) {}
+
 __attribute__((weak))
 void hook_keyboard_loop(void) {}
 

tmk_core/common/hook.h

@@ -56,6 +56,10 @@ void hook_usb_wakeup(void);
 /* Default behaviour: do nothing. */
 void hook_usb_startup_wait_loop(void);
 
+/* Called periodically from main loop */
+/* Default behaviour: do nothing. */
+void hook_main_loop(void);
+
 
 /* -------------------------------------
  * Keyboard hooks

tmk_core/common/print.h

@@ -100,6 +100,12 @@ void print_set_sendchar(int8_t (*print_sendchar_func)(uint8_t));
 #else   /* NO_PRINT */
 
 #define xprintf(s,...)              ((void)0)
+#define xsprintf(s,...)             ((void)0)
+#define xfprintf(s,...)             ((void)0)
+#define xputs(s)                    ((void)0)
+#define xputc(c)                    ((void)0)
+#define xitoa(v, r, w)              ((void)0)
+#define xatoi(s, r)                 ((void)0)
 #define print(s)                    ((void)0)
 #define println(s)                  ((void)0)
 #define print_set_sendchar(func)    ((void)0)