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common/usbx_stm32_device_controllers/ux_dcd_stm32_transfer_request.c
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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** STM32 Controller Driver */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
#define UX_DCD_STM32_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_dcd_stm32.h"
#include "ux_utility.h"
#include "ux_device_stack.h"
#if !defined(UX_DEVICE_STANDALONE)
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_dcd_stm32_transfer_request PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function will initiate a transfer to a specific endpoint. */
/* If the endpoint is IN, the endpoint register will be set to accept */
/* the request. */
/* */
/* If the endpoint is IN, the endpoint FIFO will be filled with the */
/* buffer and the endpoint register set. */
/* */
/* INPUT */
/* */
/* dcd_stm32 Pointer to device controller */
/* transfer_request Pointer to transfer request */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* */
/* CALLS */
/* */
/* HAL_PCD_EP_Transmit Transmit data */
/* HAL_PCD_EP_Receive Receive data */
/* _ux_utility_semaphore_get Get semaphore */
/* */
/* CALLED BY */
/* */
/* STM32 Controller Driver */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), used ST */
/* HAL library to drive the */
/* controller, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _ux_dcd_stm32_transfer_request(UX_DCD_STM32 *dcd_stm32, UX_SLAVE_TRANSFER *transfer_request)
{
UX_SLAVE_ENDPOINT *endpoint;
UINT status;
/* Get the pointer to the logical endpoint from the transfer request. */
endpoint = transfer_request -> ux_slave_transfer_request_endpoint;
/* Check for transfer direction. Is this a IN endpoint ? */
if (transfer_request -> ux_slave_transfer_request_phase == UX_TRANSFER_PHASE_DATA_OUT)
{
/* Transmit data. */
HAL_PCD_EP_Transmit(dcd_stm32 -> pcd_handle,
endpoint->ux_slave_endpoint_descriptor.bEndpointAddress,
transfer_request->ux_slave_transfer_request_data_pointer,
transfer_request->ux_slave_transfer_request_requested_length);
/* If the endpoint is a Control endpoint, all this is happening under Interrupt and there is no
thread to suspend. */
if ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & (UINT)~UX_ENDPOINT_DIRECTION) != 0)
{
/* We should wait for the semaphore to wake us up. */
status = _ux_utility_semaphore_get(&transfer_request -> ux_slave_transfer_request_semaphore,
(ULONG)transfer_request -> ux_slave_transfer_request_timeout);
/* Check the completion code. */
if (status != UX_SUCCESS)
return(status);
transfer_request -> ux_slave_transfer_request_actual_length = transfer_request->ux_slave_transfer_request_requested_length;
/* Check the transfer request completion code. We may have had a BUS reset or
a device disconnection. */
if (transfer_request -> ux_slave_transfer_request_completion_code != UX_SUCCESS)
return(transfer_request -> ux_slave_transfer_request_completion_code);
/* Return to caller with success. */
return(UX_SUCCESS);
}
}
else
{
/* We have a request for a SETUP or OUT Endpoint. */
/* Receive data. */
HAL_PCD_EP_Receive(dcd_stm32 -> pcd_handle,
endpoint->ux_slave_endpoint_descriptor.bEndpointAddress,
transfer_request->ux_slave_transfer_request_data_pointer,
transfer_request->ux_slave_transfer_request_requested_length);
/* If the endpoint is a Control endpoint, all this is happening under Interrupt and there is no
thread to suspend. */
if ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & (UINT)~UX_ENDPOINT_DIRECTION) != 0)
{
/* We should wait for the semaphore to wake us up. */
status = _ux_utility_semaphore_get(&transfer_request -> ux_slave_transfer_request_semaphore,
(ULONG)transfer_request -> ux_slave_transfer_request_timeout);
/* Check the completion code. */
if (status != UX_SUCCESS)
return(status);
/* Check the transfer request completion code. We may have had a BUS reset or
a device disconnection. */
if (transfer_request -> ux_slave_transfer_request_completion_code != UX_SUCCESS)
return(transfer_request -> ux_slave_transfer_request_completion_code);
/* Return to caller with success. */
return(UX_SUCCESS);
}
}
/* Return to caller with success. */
return(UX_SUCCESS);
}
#endif
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