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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 CDC ACM Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_cdc_acm.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_cdc_acm_control_request PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function manages the based sent by the host on the control */
/* endpoints with a CLASS or VENDOR SPECIFIC type. */
/* */
/* INPUT */
/* */
/* cdc_acm Pointer to cdc_acm class */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Transfer request */
/* */
/* CALLED BY */
/* */
/* CDC Class */
/* */
/**************************************************************************/
UINT _ux_device_class_cdc_acm_control_request(UX_SLAVE_CLASS_COMMAND *command)
{
UX_SLAVE_CLASS_CDC_ACM *cdc_acm;
UX_SLAVE_CLASS *class_ptr;
UX_SLAVE_TRANSFER *transfer_request;
UX_SLAVE_DEVICE *device;
ULONG request;
ULONG value;
ULONG request_length;
ULONG transmit_length;
/* Get the class container. */
class_ptr = command -> ux_slave_class_command_class_ptr;
/* Get the class instance in the container. */
cdc_acm = (UX_SLAVE_CLASS_CDC_ACM *) class_ptr -> ux_slave_class_instance;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Get the pointer to the transfer request associated with the control endpoint. */
transfer_request = &device -> ux_slave_device_control_endpoint.ux_slave_endpoint_transfer_request;
/* Extract all necessary fields of the request. */
request = *(transfer_request -> ux_slave_transfer_request_setup + UX_SETUP_REQUEST);
/* Extract all necessary fields of the value. */
value = _ux_utility_short_get(transfer_request -> ux_slave_transfer_request_setup + UX_SETUP_VALUE);
/* Pickup the request length. */
request_length = _ux_utility_short_get(transfer_request -> ux_slave_transfer_request_setup + UX_SETUP_LENGTH);
transmit_length = request_length ;
/* Here we proceed only the standard request we know of at the device level. */
switch (request)
{
case UX_SLAVE_CLASS_CDC_ACM_SET_CONTROL_LINE_STATE:
/* Reset current line state values. */
cdc_acm -> ux_slave_class_cdc_acm_data_dtr_state = 0;
cdc_acm -> ux_slave_class_cdc_acm_data_rts_state = 0;
/* Get the line state parameters from the host. DTR signal. */
if (value & UX_SLAVE_CLASS_CDC_ACM_LINE_STATE_DTR)
cdc_acm -> ux_slave_class_cdc_acm_data_dtr_state = UX_TRUE;
/* Get the line state parameters from the host. RTS signal. */
if (value & UX_SLAVE_CLASS_CDC_ACM_LINE_STATE_RTS)
cdc_acm -> ux_slave_class_cdc_acm_data_rts_state = UX_TRUE;
/* If there is a parameter change function call it. */
if (cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_parameter_change != UX_NULL)
{
/* Invoke the application. */
cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_parameter_change(cdc_acm);
}
break ;
case UX_SLAVE_CLASS_CDC_ACM_GET_LINE_CODING:
/* Setup the length appropriately. */
if (request_length > UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_RESPONSE_SIZE)
transmit_length = UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_RESPONSE_SIZE;
/* Send the line coding default parameters back to the host. */
_ux_utility_long_put(transfer_request -> ux_slave_transfer_request_data_pointer + UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_BAUDRATE_STRUCT,
cdc_acm -> ux_slave_class_cdc_acm_baudrate);
*(transfer_request -> ux_slave_transfer_request_data_pointer + UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_STOP_BIT_STRUCT) = cdc_acm -> ux_slave_class_cdc_acm_stop_bit;
*(transfer_request -> ux_slave_transfer_request_data_pointer + UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_PARITY_STRUCT) = cdc_acm -> ux_slave_class_cdc_acm_parity;
*(transfer_request -> ux_slave_transfer_request_data_pointer + UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_DATA_BIT_STRUCT) = cdc_acm -> ux_slave_class_cdc_acm_data_bit;
/* Set the phase of the transfer to data out. */
transfer_request -> ux_slave_transfer_request_phase = UX_TRANSFER_PHASE_DATA_OUT;
/* Perform the data transfer. */
_ux_device_stack_transfer_request(transfer_request, transmit_length, request_length);
break;
case UX_SLAVE_CLASS_CDC_ACM_SET_LINE_CODING:
/* Get the line coding parameters from the host. */
cdc_acm -> ux_slave_class_cdc_acm_baudrate = _ux_utility_long_get(transfer_request -> ux_slave_transfer_request_data_pointer + UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_BAUDRATE_STRUCT);
cdc_acm -> ux_slave_class_cdc_acm_stop_bit = *(transfer_request -> ux_slave_transfer_request_data_pointer + UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_STOP_BIT_STRUCT);
cdc_acm -> ux_slave_class_cdc_acm_parity = *(transfer_request -> ux_slave_transfer_request_data_pointer + UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_PARITY_STRUCT);
cdc_acm -> ux_slave_class_cdc_acm_data_bit = *(transfer_request -> ux_slave_transfer_request_data_pointer + UX_SLAVE_CLASS_CDC_ACM_LINE_CODING_DATA_BIT_STRUCT);
/* If there is a parameter change function call it. */
if (cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_parameter_change != UX_NULL)
{
/* Invoke the application. */
cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_parameter_change(cdc_acm);
}
break ;
case UX_SLAVE_CLASS_CDC_ACM_SEND_BREAK:
/* SEND_BREAK has no data stage, wValue contains break duration in ms.
0x0000 means stop break.
0x0001-0xFFFE means break signal duration in ms.
0xFFFF means indefinite break. */
cdc_acm -> ux_slave_class_cdc_acm_break_duration = (ULONG) value;
/* If there is a parameter change function call it. */
if (cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_parameter_change != UX_NULL)
cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_parameter_change(cdc_acm);
break;
default:
/* Unknown function. It's not handled. */
return(UX_ERROR);
}
/* It's handled. */
return(UX_SUCCESS);
}
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