163 lines
8.9 KiB
C
163 lines
8.9 KiB
C
/**************************************************************************/
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/* */
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/* Copyright (c) Microsoft Corporation. All rights reserved. */
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/* */
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/* This software is licensed under the Microsoft Software License */
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
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/* and in the root directory of this software. */
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/* */
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/**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** USBX Component */
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/** */
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/** STM32 Controller Driver */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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#define UX_SOURCE_CODE
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#define UX_DCD_STM32_SOURCE_CODE
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/* Include necessary system files. */
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#include "ux_api.h"
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#include "ux_dcd_stm32.h"
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#include "ux_utility.h"
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#include "ux_device_stack.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _ux_dcd_stm32_transfer_request PORTABLE C */
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/* 6.1 */
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/* AUTHOR */
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/* */
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/* Chaoqiong Xiao, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function will initiate a transfer to a specific endpoint. */
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/* If the endpoint is IN, the endpoint register will be set to accept */
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/* the request. */
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/* */
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/* If the endpoint is IN, the endpoint FIFO will be filled with the */
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/* buffer and the endpoint register set. */
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/* */
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/* INPUT */
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/* */
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/* dcd_stm32 Pointer to device controller */
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/* transfer_request Pointer to transfer request */
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/* */
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/* OUTPUT */
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/* */
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/* Completion Status */
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/* */
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/* */
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/* CALLS */
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/* */
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/* HAL_PCD_EP_Transmit Transmit data */
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/* HAL_PCD_EP_Receive Receive data */
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/* _ux_utility_semaphore_get Get semaphore */
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/* */
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/* CALLED BY */
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/* */
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/* STM32 Controller Driver */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
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/* 09-30-2020 Chaoqiong Xiao Modified comment(s), used ST */
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/* HAL library to drive the */
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/* controller, */
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/* resulting in version 6.1 */
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/* */
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/**************************************************************************/
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UINT _ux_dcd_stm32_transfer_request(UX_DCD_STM32 *dcd_stm32, UX_SLAVE_TRANSFER *transfer_request)
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{
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UX_SLAVE_ENDPOINT *endpoint;
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UINT status;
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/* Get the pointer to the logical endpoint from the transfer request. */
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endpoint = transfer_request -> ux_slave_transfer_request_endpoint;
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/* Check for transfer direction. Is this a IN endpoint ? */
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if (transfer_request -> ux_slave_transfer_request_phase == UX_TRANSFER_PHASE_DATA_OUT)
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{
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/* Transmit data. */
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HAL_PCD_EP_Transmit(dcd_stm32 -> pcd_handle,
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endpoint->ux_slave_endpoint_descriptor.bEndpointAddress,
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transfer_request->ux_slave_transfer_request_data_pointer,
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transfer_request->ux_slave_transfer_request_requested_length);
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/* If the endpoint is a Control endpoint, all this is happening under Interrupt and there is no
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thread to suspend. */
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if ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & (UINT)~UX_ENDPOINT_DIRECTION) != 0)
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{
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/* We should wait for the semaphore to wake us up. */
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status = _ux_utility_semaphore_get(&transfer_request -> ux_slave_transfer_request_semaphore, UX_WAIT_FOREVER);
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/* Check the completion code. */
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if (status != UX_SUCCESS)
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return(status);
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transfer_request -> ux_slave_transfer_request_actual_length = transfer_request->ux_slave_transfer_request_requested_length;
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/* Check the transfer request completion code. We may have had a BUS reset or
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a device disconnection. */
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if (transfer_request -> ux_slave_transfer_request_completion_code != UX_SUCCESS)
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return(transfer_request -> ux_slave_transfer_request_completion_code);
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/* Return to caller with success. */
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return(UX_SUCCESS);
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}
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}
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else
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{
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/* We have a request for a SETUP or OUT Endpoint. */
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/* Receive data. */
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HAL_PCD_EP_Receive(dcd_stm32 -> pcd_handle,
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endpoint->ux_slave_endpoint_descriptor.bEndpointAddress,
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transfer_request->ux_slave_transfer_request_data_pointer,
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transfer_request->ux_slave_transfer_request_requested_length);
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/* If the endpoint is a Control endpoint, all this is happening under Interrupt and there is no
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thread to suspend. */
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if ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & (UINT)~UX_ENDPOINT_DIRECTION) != 0)
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{
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/* We should wait for the semaphore to wake us up. */
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status = _ux_utility_semaphore_get(&transfer_request -> ux_slave_transfer_request_semaphore, UX_WAIT_FOREVER);
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/* Check the completion code. */
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if (status != UX_SUCCESS)
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return(status);
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/* Check the transfer request completion code. We may have had a BUS reset or
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a device disconnection. */
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if (transfer_request -> ux_slave_transfer_request_completion_code != UX_SUCCESS)
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return(transfer_request -> ux_slave_transfer_request_completion_code);
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/* Return to caller with success. */
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return(UX_SUCCESS);
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}
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}
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/* Return to caller with success. */
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return(UX_SUCCESS);
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}
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