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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 PIMA Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_pima.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_pima_event_set PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function sends an event to the pima class. It is processed */
/* asynchronously by the interrupt thread. */
/* */
/* INPUT */
/* */
/* pima Address of pima class */
/* event Pointer of the event */
/* */
/* OUTPUT */
/* */
/* status UX_SUCCESS if there is an */
/* event */
/* CALLS */
/* */
/* _ux_device_semaphore_put Put semaphore */
/* */
/* CALLED BY */
/* */
/* ThreadX */
/* */
/**************************************************************************/
UINT _ux_device_class_pima_event_set(UX_SLAVE_CLASS_PIMA *pima,
UX_SLAVE_CLASS_PIMA_EVENT *pima_event)
{
UX_SLAVE_CLASS_PIMA_EVENT *current_pima_event;
UX_SLAVE_CLASS_PIMA_EVENT *next_pima_event;
UX_SLAVE_DEVICE *device;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_PIMA_EVENT_SET, pima, pima_event, 0, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0)
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Check the device state. */
if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED)
{
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_DEVICE_HANDLE_UNKNOWN, device, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_DEVICE_HANDLE_UNKNOWN);
}
/* Check if interrupt endpoint is available. */
if (pima -> ux_device_class_pima_interrupt_endpoint == UX_NULL)
{
return (UX_FUNCTION_NOT_SUPPORTED);
}
/* Current position of the head. */
current_pima_event = pima -> ux_device_class_pima_event_array_head;
/* If the pointer is NULL, the round robin buffer has not been activated. */
if (current_pima_event == UX_NULL)
return (UX_ERROR);
/* Calculate the next position. */
if ((current_pima_event + 1) == pima -> ux_device_class_pima_event_array_end)
/* We are at the end, go back to the beginning. */
next_pima_event = pima -> ux_device_class_pima_event_array;
else
/* We are not at the end, increment the head position. */
next_pima_event = current_pima_event + 1;
/* Any place left for this event ? */
if (next_pima_event == pima -> ux_device_class_pima_event_array_tail)
return (UX_ERROR);
/* Update the head. */
pima -> ux_device_class_pima_event_array_head = next_pima_event;
/* There is an event to report, get the current pointer to the event. */
current_pima_event = pima -> ux_device_class_pima_event_array_tail;
/* fill in the event structure from the user. */
current_pima_event -> ux_device_class_pima_event_code = pima_event -> ux_device_class_pima_event_code;
current_pima_event -> ux_device_class_pima_event_transaction_id = pima_event -> ux_device_class_pima_event_transaction_id;
current_pima_event -> ux_device_class_pima_event_parameter_1 = pima_event -> ux_device_class_pima_event_parameter_1;
current_pima_event -> ux_device_class_pima_event_parameter_2 = pima_event -> ux_device_class_pima_event_parameter_2;
current_pima_event -> ux_device_class_pima_event_parameter_3 = pima_event -> ux_device_class_pima_event_parameter_3;
/* Set a semaphore to wake up the interrupt thread. */
_ux_device_semaphore_put(&pima -> ux_device_class_pima_interrupt_thread_semaphore);
/* Return event status to the user. */
return(UX_SUCCESS);
}
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