From 4b5d5310d192ce0dfdeb5fe0fa5be074770c7687 Mon Sep 17 00:00:00 2001
From: Kristian Sloth Lauszus <lauszus@gmail.com>
Date: Sun, 11 Mar 2018 18:38:30 +0100
Subject: [PATCH 1/2] Make the loop depend on the clock frequency when sending
 out the resume signal, as the delay time is critical

See: http://www.usbmadesimple.co.uk/ums_3.htm and https://www.nxp.com/docs/en/application-note/AN5385.pdf
---
 middleware/usb_1.0.0/device/usb_device_khci.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/middleware/usb_1.0.0/device/usb_device_khci.c b/middleware/usb_1.0.0/device/usb_device_khci.c
index 8e01f68..5f263d0 100644
--- a/middleware/usb_1.0.0/device/usb_device_khci.c
+++ b/middleware/usb_1.0.0/device/usb_device_khci.c
@@ -1199,10 +1199,19 @@ usb_status_t USB_DeviceKhciControl(usb_device_controller_handle khciHandle, usb_
 #if defined(USB_DEVICE_CONFIG_REMOTE_WAKEUP) && (USB_DEVICE_CONFIG_REMOTE_WAKEUP > 0U)
             USB_OSA_ENTER_CRITICAL();
             khciState->registerBase->CTL |= USB_CTL_RESUME_MASK;
-            for (uint32_t i = 500U; i > 0U; i--)
+#if 1 // This is a hack and is not tuned in any way, but it works - note that we can not use a timer, as interrupts are disabled
+            for (uint64_t i = MSEC_TO_COUNT(8, SystemCoreClock); i > 0U; i--)
+            {
+                // The device must apply the wakeup K condition between 1 to 15 ms - see: http://www.usbmadesimple.co.uk/ums_3.htm and https://www.nxp.com/docs/en/application-note/AN5385.pdf
+                __ASM("nop");
+            }
+#else
+            // I increasing this from 500 to 1000, but it is better to use a timer
+            for (uint32_t i = 1000U; i > 0U; i--)
             {
                 __ASM("nop");
             }
+#endif
             khciState->registerBase->CTL &= ~USB_CTL_RESUME_MASK;
             USB_OSA_EXIT_CRITICAL();
             error = kStatus_USB_Success;

From 08604d409ca0f1fca84555cbe71d59e3f1ff482c Mon Sep 17 00:00:00 2001
From: Kristian Sloth Lauszus <lauszus@gmail.com>
Date: Sun, 8 Apr 2018 19:17:56 +0200
Subject: [PATCH 2/2] Fixed compiler warning, as BIG_ENDIAN and LITTLE_ENDIAN
 are already defined on newer compilers

See: https://sourceforge.net/p/predef/wiki/Endianness/
---
 middleware/usb_1.0.0/osa/usb_osa.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/middleware/usb_1.0.0/osa/usb_osa.h b/middleware/usb_1.0.0/osa/usb_osa.h
index c1f9eaf..e961e80 100644
--- a/middleware/usb_1.0.0/osa/usb_osa.h
+++ b/middleware/usb_1.0.0/osa/usb_osa.h
@@ -41,12 +41,24 @@
  ******************************************************************************/
 
 /*! @brief Define big endian */
+#ifndef BIG_ENDIAN
 #define BIG_ENDIAN (0U)
+#endif
 /*! @brief Define little endian */
+#ifndef LITTLE_ENDIAN
 #define LITTLE_ENDIAN (1U)
+#endif
 
 /*! @brief Define current endian */
+#ifndef _BYTE_ORDER
 #define ENDIANNESS LITTLE_ENDIAN
+#else
+#if _BYTE_ORDER == _LITTLE_ENDIAN
+#define ENDIANNESS LITTLE_ENDIAN
+#else
+#define ENDIANNESS BIG_ENDIAN
+#endif
+#endif
 
 /*! @brief Define USB OSA event handle */
 typedef void *usb_osa_event_handle;