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USBTask.c
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1 /*
2  * @brief Main USB service task management
3  *
4  * @note
5  * Copyright(C) NXP Semiconductors, 2012
6  * Copyright(C) Dean Camera, 2011, 2012
7  * All rights reserved.
8  *
9  * @par
10  * Software that is described herein is for illustrative purposes only
11  * which provides customers with programming information regarding the
12  * LPC products. This software is supplied "AS IS" without any warranties of
13  * any kind, and NXP Semiconductors and its licensor disclaim any and
14  * all warranties, express or implied, including all implied warranties of
15  * merchantability, fitness for a particular purpose and non-infringement of
16  * intellectual property rights. NXP Semiconductors assumes no responsibility
17  * or liability for the use of the software, conveys no license or rights under any
18  * patent, copyright, mask work right, or any other intellectual property rights in
19  * or to any products. NXP Semiconductors reserves the right to make changes
20  * in the software without notification. NXP Semiconductors also makes no
21  * representation or warranty that such application will be suitable for the
22  * specified use without further testing or modification.
23  *
24  * @par
25  * Permission to use, copy, modify, and distribute this software and its
26  * documentation is hereby granted, under NXP Semiconductors' and its
27  * licensor's relevant copyrights in the software, without fee, provided that it
28  * is used in conjunction with NXP Semiconductors microcontrollers. This
29  * copyright, permission, and disclaimer notice must appear in all copies of
30  * this code.
31  */
32 
33 
34 #define __INCLUDE_FROM_USBTASK_C
35 #define __INCLUDE_FROM_USB_DRIVER
36 #include "USBTask.h"
37 
38 volatile bool USB_IsInitialized;
39 
40 /* This structure must be 4 bytes aligned */
43 
44 #if defined(USB_CAN_BE_HOST) && !defined(HOST_STATE_AS_GPIOR)
45 volatile uint8_t USB_HostState[MAX_USB_CORE];
46 #endif
47 
48 #if defined(USB_CAN_BE_DEVICE) && !defined(DEVICE_STATE_AS_GPIOR)
49 volatile uint8_t USB_DeviceState;
50 #endif
51 
52 void USB_USBTask(void)
53 {
54  #if defined(USB_HOST_ONLY)
55  USB_HostTask();
56  #elif defined(USB_DEVICE_ONLY)
58  #else
61  else if (USB_CurrentMode == USB_MODE_Host)
62  USB_HostTask();
63  #endif
64 }
65 
66 #if defined(USB_CAN_BE_DEVICE)
67 static void USB_DeviceTask(void)
68 {
69  if (USB_DeviceState != DEVICE_STATE_Unattached)
70  {
71  uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
72 
74 
77 
78  Endpoint_SelectEndpoint(PrevEndpoint);
79  }
80 }
81 #endif
82 
83 #if defined(USB_CAN_BE_HOST)
84 static void USB_HostTask(void)
85 {
86  uint8_t i = USB_PORT_SELECTED;
87 #if defined(USB_MULTI_PORTS)
88  for(i=0;i<MAX_USB_CORE;i++)
89 #endif
90  {
91  uint8_t PrevPipe;
92 
93  PrevPipe = Pipe_GetCurrentPipe(i);
96  Pipe_SelectPipe(i,PrevPipe);
97  }
98 }
99 #endif
100