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/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").
Contact information
-------------------
Circuits At Home, LTD
Web : http://www.circuitsathome.com
e-mail : support@circuitsathome.com
*/
#if !defined(_usb_h_) || defined(_ch9_h_)
#error "Never include usb_ch9.h directly; include Usb.h instead"
#else
/* USB chapter 9 structures */
#define _ch9_h_
/* Misc.USB constants */
#define DEV_DESCR_LEN 18 //device descriptor length
#define CONF_DESCR_LEN 9 //configuration descriptor length
#define INTR_DESCR_LEN 9 //interface descriptor length
#define EP_DESCR_LEN 7 //endpoint descriptor length
/* Standard Device Requests */
#define USB_REQUEST_GET_STATUS 0 // Standard Device Request - GET STATUS
#define USB_REQUEST_CLEAR_FEATURE 1 // Standard Device Request - CLEAR FEATURE
#define USB_REQUEST_SET_FEATURE 3 // Standard Device Request - SET FEATURE
#define USB_REQUEST_SET_ADDRESS 5 // Standard Device Request - SET ADDRESS
#define USB_REQUEST_GET_DESCRIPTOR 6 // Standard Device Request - GET DESCRIPTOR
#define USB_REQUEST_SET_DESCRIPTOR 7 // Standard Device Request - SET DESCRIPTOR
#define USB_REQUEST_GET_CONFIGURATION 8 // Standard Device Request - GET CONFIGURATION
#define USB_REQUEST_SET_CONFIGURATION 9 // Standard Device Request - SET CONFIGURATION
#define USB_REQUEST_GET_INTERFACE 10 // Standard Device Request - GET INTERFACE
#define USB_REQUEST_SET_INTERFACE 11 // Standard Device Request - SET INTERFACE
#define USB_REQUEST_SYNCH_FRAME 12 // Standard Device Request - SYNCH FRAME
#define USB_FEATURE_ENDPOINT_HALT 0 // CLEAR/SET FEATURE - Endpoint Halt
#define USB_FEATURE_DEVICE_REMOTE_WAKEUP 1 // CLEAR/SET FEATURE - Device remote wake-up
#define USB_FEATURE_TEST_MODE 2 // CLEAR/SET FEATURE - Test mode
/* Setup Data Constants */
#define USB_SETUP_HOST_TO_DEVICE 0x00 // Device Request bmRequestType transfer direction - host to device transfer
#define USB_SETUP_DEVICE_TO_HOST 0x80 // Device Request bmRequestType transfer direction - device to host transfer
#define USB_SETUP_TYPE_STANDARD 0x00 // Device Request bmRequestType type - standard
#define USB_SETUP_TYPE_CLASS 0x20 // Device Request bmRequestType type - class
#define USB_SETUP_TYPE_VENDOR 0x40 // Device Request bmRequestType type - vendor
#define USB_SETUP_RECIPIENT_DEVICE 0x00 // Device Request bmRequestType recipient - device
#define USB_SETUP_RECIPIENT_INTERFACE 0x01 // Device Request bmRequestType recipient - interface
#define USB_SETUP_RECIPIENT_ENDPOINT 0x02 // Device Request bmRequestType recipient - endpoint
#define USB_SETUP_RECIPIENT_OTHER 0x03 // Device Request bmRequestType recipient - other
/* USB descriptors */
#define USB_DESCRIPTOR_DEVICE 0x01 // bDescriptorType for a Device Descriptor.
#define USB_DESCRIPTOR_CONFIGURATION 0x02 // bDescriptorType for a Configuration Descriptor.
#define USB_DESCRIPTOR_STRING 0x03 // bDescriptorType for a String Descriptor.
#define USB_DESCRIPTOR_INTERFACE 0x04 // bDescriptorType for an Interface Descriptor.
#define USB_DESCRIPTOR_ENDPOINT 0x05 // bDescriptorType for an Endpoint Descriptor.
#define USB_DESCRIPTOR_DEVICE_QUALIFIER 0x06 // bDescriptorType for a Device Qualifier.
#define USB_DESCRIPTOR_OTHER_SPEED 0x07 // bDescriptorType for a Other Speed Configuration.
#define USB_DESCRIPTOR_INTERFACE_POWER 0x08 // bDescriptorType for Interface Power.
#define USB_DESCRIPTOR_OTG 0x09 // bDescriptorType for an OTG Descriptor.
#define HID_DESCRIPTOR_HID 0x21
/* OTG SET FEATURE Constants */
#define OTG_FEATURE_B_HNP_ENABLE 3 // SET FEATURE OTG - Enable B device to perform HNP
#define OTG_FEATURE_A_HNP_SUPPORT 4 // SET FEATURE OTG - A device supports HNP
#define OTG_FEATURE_A_ALT_HNP_SUPPORT 5 // SET FEATURE OTG - Another port on the A device supports HNP
/* USB Endpoint Transfer Types */
#define USB_TRANSFER_TYPE_CONTROL 0x00 // Endpoint is a control endpoint.
#define USB_TRANSFER_TYPE_ISOCHRONOUS 0x01 // Endpoint is an isochronous endpoint.
#define USB_TRANSFER_TYPE_BULK 0x02 // Endpoint is a bulk endpoint.
#define USB_TRANSFER_TYPE_INTERRUPT 0x03 // Endpoint is an interrupt endpoint.
#define bmUSB_TRANSFER_TYPE 0x03 // bit mask to separate transfer type from ISO attributes
/* Standard Feature Selectors for CLEAR_FEATURE Requests */
#define USB_FEATURE_ENDPOINT_STALL 0 // Endpoint recipient
#define USB_FEATURE_DEVICE_REMOTE_WAKEUP 1 // Device recipient
#define USB_FEATURE_TEST_MODE 2 // Device recipient
/* descriptor data structures */
/* Device descriptor structure */
typedef struct {
uint8_t bLength; // Length of this descriptor.
uint8_t bDescriptorType; // DEVICE descriptor type (USB_DESCRIPTOR_DEVICE).
uint16_t bcdUSB; // USB Spec Release Number (BCD).
uint8_t bDeviceClass; // Class code (assigned by the USB-IF). 0xFF-Vendor specific.
uint8_t bDeviceSubClass; // Subclass code (assigned by the USB-IF).
uint8_t bDeviceProtocol; // Protocol code (assigned by the USB-IF). 0xFF-Vendor specific.
uint8_t bMaxPacketSize0; // Maximum packet size for endpoint 0.
uint16_t idVendor; // Vendor ID (assigned by the USB-IF).
uint16_t idProduct; // Product ID (assigned by the manufacturer).
uint16_t bcdDevice; // Device release number (BCD).
uint8_t iManufacturer; // Index of String Descriptor describing the manufacturer.
uint8_t iProduct; // Index of String Descriptor describing the product.
uint8_t iSerialNumber; // Index of String Descriptor with the device's serial number.
uint8_t bNumConfigurations; // Number of possible configurations.
} __attribute__((packed)) USB_DEVICE_DESCRIPTOR;
/* Configuration descriptor structure */
typedef struct {
uint8_t bLength; // Length of this descriptor.
uint8_t bDescriptorType; // CONFIGURATION descriptor type (USB_DESCRIPTOR_CONFIGURATION).
uint16_t wTotalLength; // Total length of all descriptors for this configuration.
uint8_t bNumInterfaces; // Number of interfaces in this configuration.
uint8_t bConfigurationValue; // Value of this configuration (1 based).
uint8_t iConfiguration; // Index of String Descriptor describing the configuration.
uint8_t bmAttributes; // Configuration characteristics.
uint8_t bMaxPower; // Maximum power consumed by this configuration.
} __attribute__((packed)) USB_CONFIGURATION_DESCRIPTOR;
/* Interface descriptor structure */
typedef struct {
uint8_t bLength; // Length of this descriptor.
uint8_t bDescriptorType; // INTERFACE descriptor type (USB_DESCRIPTOR_INTERFACE).
uint8_t bInterfaceNumber; // Number of this interface (0 based).
uint8_t bAlternateSetting; // Value of this alternate interface setting.
uint8_t bNumEndpoints; // Number of endpoints in this interface.
uint8_t bInterfaceClass; // Class code (assigned by the USB-IF). 0xFF-Vendor specific.
uint8_t bInterfaceSubClass; // Subclass code (assigned by the USB-IF).
uint8_t bInterfaceProtocol; // Protocol code (assigned by the USB-IF). 0xFF-Vendor specific.
uint8_t iInterface; // Index of String Descriptor describing the interface.
} __attribute__((packed)) USB_INTERFACE_DESCRIPTOR;
/* Endpoint descriptor structure */
typedef struct {
uint8_t bLength; // Length of this descriptor.
uint8_t bDescriptorType; // ENDPOINT descriptor type (USB_DESCRIPTOR_ENDPOINT).
uint8_t bEndpointAddress; // Endpoint address. Bit 7 indicates direction (0=OUT, 1=IN).
uint8_t bmAttributes; // Endpoint transfer type.
uint16_t wMaxPacketSize; // Maximum packet size.
uint8_t bInterval; // Polling interval in frames.
} __attribute__((packed)) USB_ENDPOINT_DESCRIPTOR;
/* HID descriptor */
typedef struct {
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t bcdHID; // HID class specification release
uint8_t bCountryCode;
uint8_t bNumDescriptors; // Number of additional class specific descriptors
uint8_t bDescrType; // Type of class descriptor
uint16_t wDescriptorLength; // Total size of the Report descriptor
} __attribute__((packed)) USB_HID_DESCRIPTOR;
typedef struct {
uint8_t bDescrType; // Type of class descriptor
uint16_t wDescriptorLength; // Total size of the Report descriptor
} __attribute__((packed)) HID_CLASS_DESCRIPTOR_LEN_AND_TYPE;
#endif // _ch9_h_
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