cdc.h

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/** @defgroup usb_cdc_defines USB CDC Type Definitions
 
@brief <b>Defined Constants and Types for the USB CDC Type Definitions</b>
 
@ingroup USB_defines
 
@version 1.0.0
 
@author @htmlonly &copy; @endhtmlonly 2010
Gareth McMullin <gareth@blacksphere.co.nz>
 
@date 10 March 2013
 
LGPL License Terms @ref lgpl_license
*/
 
/*
 * This file is part of the libopencm3 project.
 *
 * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
/**@{*/
 
#ifndef __CDC_H
#define __CDC_H
 
#include <stdint.h>
 
/* Definitions of Communications Device Class from
 * "Universal Serial Bus Class Definitions for Communications Devices
 * Revision 1.2"
 */
 
/* Table 2: Communications Device Class Code */
#define USB_CLASS_CDC                   0x02
 
/* Table 4: Class Subclass Code */
#define USB_CDC_SUBCLASS_DLCM           0x01
#define USB_CDC_SUBCLASS_ACM            0x02
/* ... */
 
/* Table 5 Communications Interface Class Control Protocol Codes */
#define USB_CDC_PROTOCOL_NONE           0x00
#define USB_CDC_PROTOCOL_AT             0x01
/* ... */
 
/* Table 6: Data Interface Class Code */
#define USB_CLASS_DATA                  0x0A
 
/* Table 12: Type Values for the bDescriptorType Field */
#define CS_INTERFACE                    0x24
#define CS_ENDPOINT                     0x25
 
/* Table 13: bDescriptor SubType in Communications Class Functional
 * Descriptors */
#define USB_CDC_TYPE_HEADER             0x00
#define USB_CDC_TYPE_CALL_MANAGEMENT    0x01
#define USB_CDC_TYPE_ACM                0x02
/* ... */
#define USB_CDC_TYPE_UNION              0x06
/* ... */
 
/* Table 15: Class-Specific Descriptor Header Format */
struct usb_cdc_header_descriptor {
        uint8_t bFunctionLength;
        uint8_t bDescriptorType;
        uint8_t bDescriptorSubtype;
        uint16_t bcdCDC;
} __attribute__((packed));
 
/* Table 16: Union Interface Functional Descriptor */
struct usb_cdc_union_descriptor {
        uint8_t bFunctionLength;
        uint8_t bDescriptorType;
        uint8_t bDescriptorSubtype;
        uint8_t bControlInterface;
        uint8_t bSubordinateInterface0;
        /* ... */
} __attribute__((packed));
 
 
/* Definitions for Abstract Control Model devices from:
 * "Universal Serial Bus Communications Class Subclass Specification for
 * PSTN Devices"
 */
 
/* Table 3: Call Management Functional Descriptor */
struct usb_cdc_call_management_descriptor {
        uint8_t bFunctionLength;
        uint8_t bDescriptorType;
        uint8_t bDescriptorSubtype;
        uint8_t bmCapabilities;
        uint8_t bDataInterface;
} __attribute__((packed));
 
/* Table 4: Abstract Control Management Functional Descriptor */
struct usb_cdc_acm_descriptor {
        uint8_t bFunctionLength;
        uint8_t bDescriptorType;
        uint8_t bDescriptorSubtype;
        uint8_t bmCapabilities;
} __attribute__((packed));
 
/* Table 13: Class-Specific Request Codes for PSTN subclasses */
/* ... */
#define USB_CDC_REQ_SET_LINE_CODING             0x20
/* ... */
#define USB_CDC_REQ_SET_CONTROL_LINE_STATE      0x22
/* ... */
 
/* Table 17: Line Coding Structure */
struct usb_cdc_line_coding {
        uint32_t dwDTERate;
        uint8_t bCharFormat;
        uint8_t bParityType;
        uint8_t bDataBits;
} __attribute__((packed));
 
enum usb_cdc_line_coding_bCharFormat {
        USB_CDC_1_STOP_BITS                     = 0,
        USB_CDC_1_5_STOP_BITS                   = 1,
        USB_CDC_2_STOP_BITS                     = 2,
};
 
enum usb_cdc_line_coding_bParityType {
        USB_CDC_NO_PARITY                       = 0,
        USB_CDC_ODD_PARITY                      = 1,
        USB_CDC_EVEN_PARITY                     = 2,
        USB_CDC_MARK_PARITY                     = 3,
        USB_CDC_SPACE_PARITY                    = 4,
};
 
/* Table 30: Class-Specific Notification Codes for PSTN subclasses */
/* ... */
#define USB_CDC_NOTIFY_SERIAL_STATE             0x20
/* ... */
 
/* Notification Structure */
struct usb_cdc_notification {
        uint8_t bmRequestType;
        uint8_t bNotification;
        uint16_t wValue;
        uint16_t wIndex;
        uint16_t wLength;
} __attribute__((packed));
 
#endif
 
/**@}*/