From: Jun Wako <wakojun@gmail.com>
Date: Sat, 17 Oct 2015 06:28:21 +0000 (+0900)
Subject: Fix drop key stroke
X-Git-Url: https://git.friedersdorff.com/?a=commitdiff_plain;h=8bcddd24f7320344aba9c9e757be2a7d516f4faa;p=max%2Ftmk_keyboard.git

Fix drop key stroke

Keyboard report should be checked if its transfer finishs successfully.
Otherwise key stroke can be missing when other key event occurs
before the last report transfer is done.

Boot protocol 10ms interval probably causes this problem in case
it receives key events in a row within the period. NKRO protocol
suffers less or nothing due to its interval 1ms.
---

diff --git a/tmk_core/protocol/chibios/usb_main.c b/tmk_core/protocol/chibios/usb_main.c
index 619b798b..0fc2f6e3 100644
--- a/tmk_core/protocol/chibios/usb_main.c
+++ b/tmk_core/protocol/chibios/usb_main.c
@@ -1121,19 +1121,24 @@ void send_keyboard(report_keyboard_t *report) {
   }
   osalSysUnlock();
 
+  bool ret;
 #ifdef NKRO_ENABLE
   if(keyboard_nkro) {  /* NKRO protocol */
     usbPrepareTransmit(&USB_DRIVER, NKRO_ENDPOINT, (uint8_t *)report, sizeof(report_keyboard_t));
-    osalSysLock();
-    usbStartTransmitI(&USB_DRIVER, NKRO_ENDPOINT);
-    osalSysUnlock();
+    do {
+        osalSysLock();
+        ret = usbStartTransmitI(&USB_DRIVER, NKRO_ENDPOINT);
+        osalSysUnlock();
+    } while (ret);
   } else
 #endif /* NKRO_ENABLE */
   { /* boot protocol */
     usbPrepareTransmit(&USB_DRIVER, KBD_ENDPOINT, (uint8_t *)report, KBD_EPSIZE);
-    osalSysLock();
-    usbStartTransmitI(&USB_DRIVER, KBD_ENDPOINT);
-    osalSysUnlock();
+    do {
+        osalSysLock();
+        ret = usbStartTransmitI(&USB_DRIVER, KBD_ENDPOINT);
+        osalSysUnlock();
+    } while (ret);
   }
   keyboard_report_sent = *report;
 }