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 /** ACM CDC 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_cdc_acm.h" 30 #include "ux_host_stack.h" 31 32 33 #if defined(UX_HOST_STANDALONE) 34 /**************************************************************************/ 35 /* */ 36 /* FUNCTION RELEASE */ 37 /* */ 38 /* _ux_host_class_cdc_acm_transmission_callback PORTABLE C */ 39 /* 6.1.10 */ 40 /* AUTHOR */ 41 /* */ 42 /* Chaoqiong Xiao, Microsoft Corporation */ 43 /* */ 44 /* DESCRIPTION */ 45 /* */ 46 /* This function is the callback from the USBX transfer functions, */ 47 /* it is called when a full or partial transfer has been done for a */ 48 /* bulk in transfer. It calls back the application. */ 49 /* */ 50 /* It's for standalone mode. */ 51 /* */ 52 /* INPUT */ 53 /* */ 54 /* transfer_request Pointer to transfer request */ 55 /* */ 56 /* OUTPUT */ 57 /* */ 58 /* None */ 59 /* */ 60 /* CALLS */ 61 /* */ 62 /* _ux_host_stack_transfer_run Process transfer request */ 63 /* */ 64 /* CALLED BY */ 65 /* */ 66 /* Application */ 67 /* */ 68 /* RELEASE HISTORY */ 69 /* */ 70 /* DATE NAME DESCRIPTION */ 71 /* */ 72 /* 01-31-2022 Chaoqiong Xiao Initial Version 6.1.10 */ 73 /* */ 74 /**************************************************************************/ _ux_host_class_cdc_acm_transmission_callback(UX_TRANSFER * transfer_request)75VOID _ux_host_class_cdc_acm_transmission_callback(UX_TRANSFER *transfer_request) 76 { 77 78 UX_HOST_CLASS_CDC_ACM *cdc_acm; 79 ULONG request_length; 80 VOID (*write_callback)(struct UX_HOST_CLASS_CDC_ACM_STRUCT *, UINT, ULONG); 81 82 /* Get the class instance for this transfer request. */ 83 cdc_acm = (UX_HOST_CLASS_CDC_ACM *) transfer_request -> ux_transfer_request_class_instance; 84 85 /* Check the state of the transfer. If there is an error, we do not proceed with this report. */ 86 if (transfer_request -> ux_transfer_request_completion_code == UX_SUCCESS) 87 { 88 89 /* Update write information. */ 90 cdc_acm -> ux_host_class_cdc_acm_write_count += 91 transfer_request -> ux_transfer_request_actual_length; 92 93 /* Check if there is remaining. */ 94 request_length = cdc_acm -> ux_host_class_cdc_acm_write_length - 95 cdc_acm -> ux_host_class_cdc_acm_write_count; 96 if (request_length > 0) 97 { 98 99 /* Program the maximum authorized length for this transfer_request. */ 100 if (request_length > transfer_request -> ux_transfer_request_maximum_length) 101 request_length = transfer_request -> ux_transfer_request_maximum_length; 102 103 /* Update buffer pointer and request length. */ 104 transfer_request -> ux_transfer_request_data_pointer += 105 transfer_request -> ux_transfer_request_actual_length; 106 transfer_request -> ux_transfer_request_requested_length = request_length; 107 UX_TRANSFER_STATE_RESET(transfer_request); 108 109 /* Arm another transfer. */ 110 _ux_host_stack_transfer_run(transfer_request); 111 112 /* There is no status to be reported back to the stack. */ 113 return; 114 } 115 } 116 117 /* There is error, or total things done, set state to idle. */ 118 cdc_acm -> ux_host_class_cdc_acm_write_state = UX_STATE_RESET; 119 120 /* Clear callback for blocking mode. */ 121 write_callback = cdc_acm -> ux_host_class_cdc_acm_write_callback; 122 cdc_acm -> ux_host_class_cdc_acm_write_callback = UX_NULL; 123 124 /* We need to report this transfer to the application. */ 125 if (write_callback) 126 { 127 write_callback(cdc_acm, 128 transfer_request -> ux_transfer_request_completion_code, 129 cdc_acm -> ux_host_class_cdc_acm_write_count); 130 } 131 132 /* There is no status to be reported back to the stack. */ 133 return; 134 } 135 #endif 136
