1 /**************************************************************************/ 2 /* */ 3 /* Copyright (c) Microsoft Corporation. All rights reserved. */ 4 /* */ 5 /* This software is licensed under the Microsoft Software License */ 6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */ 7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ 8 /* and in the root directory of this software. */ 9 /* */ 10 /**************************************************************************/ 11 12 13 /**************************************************************************/ 14 /**************************************************************************/ 15 /** */ 16 /** USBX Component */ 17 /** */ 18 /** PIMA Class */ 19 /** */ 20 /**************************************************************************/ 21 /**************************************************************************/ 22 23 24 /* Include necessary system files. */ 25 26 #define UX_SOURCE_CODE 27 28 #include "ux_api.h" 29 #include "ux_host_class_pima.h" 30 #include "ux_host_stack.h" 31 32 33 /**************************************************************************/ 34 /* */ 35 /* FUNCTION RELEASE */ 36 /* */ 37 /* _ux_host_class_pima_object_open PORTABLE C */ 38 /* 6.1 */ 39 /* AUTHOR */ 40 /* */ 41 /* Chaoqiong Xiao, Microsoft Corporation */ 42 /* */ 43 /* DESCRIPTION */ 44 /* */ 45 /* This function opens an object for a read or write operation */ 46 /* INPUT */ 47 /* */ 48 /* pima Pointer to pima class */ 49 /* pima_session Pointer to pima session */ 50 /* object_handle The object handle */ 51 /* object Pointer to object info */ 52 /* */ 53 /* OUTPUT */ 54 /* */ 55 /* Completion Status */ 56 /* */ 57 /* CALLS */ 58 /* */ 59 /* None */ 60 /* */ 61 /* CALLED BY */ 62 /* */ 63 /* USB application */ 64 /* */ 65 /* RELEASE HISTORY */ 66 /* */ 67 /* DATE NAME DESCRIPTION */ 68 /* */ 69 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ 70 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ 71 /* resulting in version 6.1 */ 72 /* */ 73 /**************************************************************************/ _ux_host_class_pima_object_open(UX_HOST_CLASS_PIMA * pima,UX_HOST_CLASS_PIMA_SESSION * pima_session,ULONG object_handle,UX_HOST_CLASS_PIMA_OBJECT * object)74UINT _ux_host_class_pima_object_open(UX_HOST_CLASS_PIMA *pima, 75 UX_HOST_CLASS_PIMA_SESSION *pima_session, 76 ULONG object_handle, UX_HOST_CLASS_PIMA_OBJECT *object) 77 { 78 79 UX_PARAMETER_NOT_USED(object_handle); 80 UX_PARAMETER_NOT_USED(pima); 81 82 /* Check if this session is valid or not. */ 83 if (pima_session -> ux_host_class_pima_session_magic != UX_HOST_CLASS_PIMA_MAGIC_NUMBER) 84 return (UX_HOST_CLASS_PIMA_RC_SESSION_NOT_OPEN); 85 86 /* Check if this session is opened or not. */ 87 if (pima_session -> ux_host_class_pima_session_state != UX_HOST_CLASS_PIMA_SESSION_STATE_OPENED) 88 return (UX_HOST_CLASS_PIMA_RC_SESSION_NOT_OPEN); 89 90 /* Check if the object is already opened. */ 91 if (object -> ux_host_class_pima_object_state != UX_HOST_CLASS_PIMA_OBJECT_STATE_CLOSED) 92 return (UX_HOST_CLASS_PIMA_RC_OBJECT_ALREADY_OPENED); 93 94 /* Open the object. */ 95 object -> ux_host_class_pima_object_state = UX_HOST_CLASS_PIMA_OBJECT_STATE_OPENED; 96 97 /* Reset the object offset. */ 98 object -> ux_host_class_pima_object_offset = 0; 99 100 /* Set the object transfer status to inactive. */ 101 object -> ux_host_class_pima_object_transfer_status = UX_HOST_CLASS_PIMA_OBJECT_TRANSFER_STATUS_INACTIVE; 102 103 /* Return completion status. */ 104 return(UX_SUCCESS); 105 } 106 107
