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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Device dfu Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_dfu.h"
#include "ux_device_stack.h"
#if !defined(UX_DEVICE_STANDALONE)
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_dfu_thread PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the thread of the dfu class. It waits for the */
/* dfu command to signal a DFU_DETACH stage and either force a */
/* disconnect from the device or wait for the host to detach. */
/* */
/* It's for RTOS mode. */
/* */
/* INPUT */
/* */
/* dfu_class Address of dfu class */
/* container */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_utility_event_flags_get Get event flags */
/* _ux_utility_delay_ms Delay in milliseconds */
/* */
/* CALLED BY */
/* */
/* ThreadX */
/* */
/**************************************************************************/
VOID _ux_device_class_dfu_thread(ULONG dfu_class)
{
UX_SLAVE_CLASS *class_ptr;
UX_SLAVE_CLASS_DFU *dfu;
UX_SLAVE_DCD *dcd;
UINT status;
ULONG actual_flags;
/* Cast properly the dfu instance. */
UX_THREAD_EXTENSION_PTR_GET(class_ptr, UX_SLAVE_CLASS, dfu_class)
/* Get the dfu instance from this class container. */
dfu = (UX_SLAVE_CLASS_DFU *) class_ptr -> ux_slave_class_instance;
/* This thread runs forever. */
while(1)
{
/* Wait until we have a event sent by the application. */
status = _ux_utility_event_flags_get(&dfu -> ux_slave_class_dfu_event_flags_group, (UX_DEVICE_CLASS_DFU_THREAD_EVENT_DISCONNECT |
UX_DEVICE_CLASS_DFU_THREAD_EVENT_WAIT_RESET),
UX_OR_CLEAR, &actual_flags, UX_WAIT_FOREVER);
/* Check the completion code and the actual flags returned. */
if (status == UX_SUCCESS)
{
/* Check the source of event. */
if (actual_flags & UX_DEVICE_CLASS_DFU_THREAD_EVENT_DISCONNECT)
{
/* We need to disconnect. The control command for DETACH is still being processed, wait 2-3 ms. */
_ux_utility_delay_ms(2);
/* Get the pointer to the DCD. */
dcd = &_ux_system_slave -> ux_system_slave_dcd;
/* Issue a Soft Disconnect. */
dcd -> ux_slave_dcd_function(dcd, UX_DCD_CHANGE_STATE, (VOID *) UX_DEVICE_FORCE_DISCONNECT);
}
/* Check the source of event. */
if (actual_flags & UX_DEVICE_CLASS_DFU_THREAD_EVENT_WAIT_RESET)
{
/* We need to wait for reset. Arm a timer. The timeout value is indicated in ms from
the device framework. */
_ux_utility_delay_ms(_ux_system_slave -> ux_system_slave_device_dfu_detach_timeout);
/* Check the mode. */
if (_ux_system_slave -> ux_system_slave_device_dfu_mode == UX_DEVICE_CLASS_DFU_MODE_RUNTIME)
/* We are still in RunTime mode. The host never reset. Revert to AppIdle state. */
_ux_system_slave -> ux_system_slave_device_dfu_state_machine = UX_SYSTEM_DFU_STATE_APP_IDLE;
}
}
}
}
#endif
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