Loop based vusb_transfer_keyboard

tmk_core/protocol/vusb/vusb.c

@@ -27,6 +27,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "host_driver.h"
 #include "vusb.h"
 #include "bootloader.h"
+#include <util/delay.h>
 
 
 static uint8_t vusb_keyboard_leds = 0;
@@ -46,9 +47,12 @@ typedef struct {
 
 static keyboard_report_t keyboard_report; // sent to PC
 
+#define VUSB_TRANSFER_KEYBOARD_MAX_TRIES 10
+
 /* transfer keyboard report from buffer */
 void vusb_transfer_keyboard(void)
 {
+    for (int i = 0; i < VUSB_TRANSFER_KEYBOARD_MAX_TRIES; i++) {
         if (usbInterruptIsReady()) {
             if (kbuf_head != kbuf_tail) {
                 usbSetInterrupt((void *)&kbuf[kbuf_tail], sizeof(report_keyboard_t));
@@ -59,9 +63,10 @@ void vusb_transfer_keyboard(void)
                     print(")\n");
                 }
             }
-    } else {
+            break;
+        }
         usbPoll();
-      vusb_transfer_keyboard();
+        _delay_ms(1);
     }
 }