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common/usbx_stm32_host_controllers/ux_hcd_stm32_periodic_schedule.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 */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#define UX_HCD_STM32_SOURCE_CODE
#include "ux_api.h"
#include "ux_hcd_stm32.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_hcd_stm32_periodic_schedule PORTABLE C */
/* 6.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function schedules new transfers from the periodic interrupt */
/* list. */
/* */
/* INPUT */
/* */
/* hcd_stm32 Pointer to STM32 controller */
/* */
/* OUTPUT */
/* */
/* TRUE or FALSE */
/* */
/* CALLS */
/* */
/* HAL_HCD_GetCurrentFrame Get frame number */
/* */
/* CALLED BY */
/* */
/* STM32 Controller Driver */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* */
/**************************************************************************/
UINT _ux_hcd_stm32_periodic_schedule(UX_HCD_STM32 *hcd_stm32)
{
UX_HCD_STM32_ED *ed;
ULONG frame_number;
ULONG ep_bmAttributes;
UX_TRANSFER *transfer_request;
/* Get the current frame number. */
frame_number = HAL_HCD_GetCurrentFrame(hcd_stm32 -> hcd_handle);
/* Get the first ED in the periodic list. */
ed = hcd_stm32 -> ux_hcd_stm32_periodic_ed_head;
/* Search for an entry in the periodic tree. */
while (ed != UX_NULL)
{
/* Check if the periodic transfer should be scheduled in this frame. */
if ((frame_number & ed -> ux_stm32_ed_interval_mask) == ed -> ux_stm32_ed_interval_position)
{
/* Get the transfer request. */
transfer_request = ed -> ux_stm32_ed_transfer_request;
/* Check if there is transfer pending. */
if (transfer_request)
{
/* Get Endpoint bmAttributes */
ep_bmAttributes = ed -> ux_stm32_ed_endpoint -> ux_endpoint_descriptor.bmAttributes;
/* Call HAL driver to submit the transfer request. */
HAL_HCD_HC_SubmitRequest(hcd_stm32 -> hcd_handle, ed -> ux_stm32_ed_channel,
(transfer_request -> ux_transfer_request_type & UX_REQUEST_DIRECTION) == UX_REQUEST_IN ? 1 : 0,
(ep_bmAttributes & UX_MASK_ENDPOINT_TYPE) == UX_INTERRUPT_ENDPOINT ? EP_TYPE_INTR : EP_TYPE_ISOC,
USBH_PID_DATA,
transfer_request -> ux_transfer_request_data_pointer,
transfer_request -> ux_transfer_request_requested_length, 0);
}
}
/* Point to the next ED in the list. */
ed = ed -> ux_stm32_ed_next_ed;
}
/* Return to caller. */
return(UX_FALSE);
}