update hid_composite freertos with capslock as well

examples/device/hid_composite/src/main.c

@@ -274,7 +274,8 @@ void tud_hid_set_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t rep
         board_led_write(true);
       }else
       {
-        // Caplocks Off: back to normal link
+        // Caplocks Off: back to normal blink
+        board_led_write(false);
         blink_interval_ms = BLINK_MOUNTED;
       }
     }

examples/device/hid_composite_freertos/src/main.c

@@ -315,12 +315,31 @@ uint16_t tud_hid_get_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t
 // received data on OUT endpoint ( Report ID = 0, Type = 0 )
 void tud_hid_set_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize)
 {
-  // TODO set LED based on CAPLOCK, NUMLOCK etc...
   (void) itf;
-  (void) report_id;
-  (void) report_type;
-  (void) buffer;
-  (void) bufsize;
+
+  if (report_type == HID_REPORT_TYPE_OUTPUT)
+  {
+    // Set keyboard LED e.g Capslock, Numlock etc...
+    if (report_id == REPORT_ID_KEYBOARD)
+    {
+      // bufsize should be (at least) 1
+      if ( bufsize < 1 ) return;
+
+      uint8_t const kbd_leds = buffer[0];
+
+      if (kbd_leds & KEYBOARD_LED_CAPSLOCK)
+      {
+        // Capslock On: disable blink, turn led on
+        xTimerStop(blinky_tm, portMAX_DELAY);
+        board_led_write(true);
+      }else
+      {
+        // Caplocks Off: back to normal blink
+        board_led_write(false);
+        xTimerStart(blinky_tm, portMAX_DELAY);
+      }
+    }
+  }
 }
 
 //--------------------------------------------------------------------+