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 /** PROLIFIC 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_prolific.h" 30 #include "ux_host_stack.h" 31 32 33 /**************************************************************************/ 34 /* */ 35 /* FUNCTION RELEASE */ 36 /* */ 37 /* _ux_host_class_prolific_transfer_request_completed PORTABLE C */ 38 /* 6.1.9 */ 39 /* AUTHOR */ 40 /* */ 41 /* Chaoqiong Xiao, Microsoft Corporation */ 42 /* */ 43 /* DESCRIPTION */ 44 /* */ 45 /* This function is called by the completion thread when a transfer */ 46 /* request has been completed either because the transfer is */ 47 /* successful or there was an error. */ 48 /* */ 49 /* INPUT */ 50 /* */ 51 /* transfer_request Pointer to transfer request */ 52 /* */ 53 /* OUTPUT */ 54 /* */ 55 /* None */ 56 /* */ 57 /* CALLS */ 58 /* */ 59 /* _ux_host_stack_transfer_request Transfer request */ 60 /* */ 61 /* CALLED BY */ 62 /* */ 63 /* USBX stack */ 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 /* 10-15-2021 Chaoqiong Xiao Modified comment(s), */ 73 /* use pre-calculated value */ 74 /* instead of wMaxPacketSize, */ 75 /* resulting in version 6.1.9 */ 76 /* */ 77 /**************************************************************************/ _ux_host_class_prolific_transfer_request_completed(UX_TRANSFER * transfer_request)78VOID _ux_host_class_prolific_transfer_request_completed(UX_TRANSFER *transfer_request) 79 { 80 81 UX_HOST_CLASS_PROLIFIC *prolific; 82 83 84 /* Get the class instance for this transfer request. */ 85 prolific = (UX_HOST_CLASS_PROLIFIC *) transfer_request -> ux_transfer_request_class_instance; 86 87 /* Check the state of the transfer. If there is an error, we do not proceed with this notification. */ 88 if (transfer_request -> ux_transfer_request_completion_code != UX_SUCCESS) 89 90 /* We do not proceed. */ 91 return; 92 93 /* Check if the class is in shutdown. */ 94 if (prolific -> ux_host_class_prolific_state == UX_HOST_CLASS_INSTANCE_SHUTDOWN) 95 96 /* We do not proceed. */ 97 return; 98 99 /* Increment the notification count. */ 100 prolific -> ux_host_class_prolific_notification_count++; 101 102 /* Look at what the the status is. First ensure the length of our interrupt pipe data is correct. */ 103 if (transfer_request -> ux_transfer_request_actual_length == 104 transfer_request -> ux_transfer_request_requested_length) 105 { 106 107 /* Check if device is present. */ 108 if ((*(transfer_request -> ux_transfer_request_data_pointer + UX_HOST_CLASS_PROLIFIC_DEVICE_STATE_OFFSET) & 109 UX_HOST_CLASS_PROLIFIC_DEVICE_STATE_MASK) == 0) 110 111 /* Device is not present. */ 112 prolific -> ux_host_class_prolific_device_state = UX_HOST_CLASS_PROLIFIC_DEVICE_NOT_PRESENT; 113 114 else 115 116 /* Device is present. */ 117 prolific -> ux_host_class_prolific_device_state = UX_HOST_CLASS_PROLIFIC_DEVICE_PRESENT; 118 119 /* If there is a callback present, invoke it. */ 120 if (prolific -> ux_host_class_prolific_device_status_change_callback != UX_NULL) 121 122 /* There is a callback, send the status change to the application. */ 123 prolific -> ux_host_class_prolific_device_status_change_callback(prolific, prolific -> ux_host_class_prolific_device_state); 124 125 } 126 127 /* Reactivate the PROLIFIC interrupt pipe. */ 128 _ux_host_stack_transfer_request(transfer_request); 129 130 /* Return to caller. */ 131 return; 132 } 133 134
