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descriptors.h
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descriptors.h
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#pragma once
#include <stdint.h>
#include <avr/pgmspace.h>
/* Do not include this file anywhere else than usb.c */
static const uint8_t PROGMEM device_descriptor[] = {
18, // bLength
1, // bDescriptorType
0x00, 0x02, // bcdUSB
0, // bDeviceClass
0, // bDeviceSubClass
0, // bDeviceProtocol
ENDPOINT0_SIZE, // bMaxPacketSize0
LSB(VENDOR_ID), MSB(VENDOR_ID), // idVendor
LSB(PRODUCT_ID), MSB(PRODUCT_ID), // idProduct
0x00, 0x01, // bcdDevice
1, // iManufacturer
2, // iProduct
0, // iSerialNumber
1 // bNumConfigurations
};
/* The following HID descriptors' format is described in
* Keyboard Protocol 1, HID 1.11 spec, Appendix B, page 59-60 */
/* This descriptor makes sure no reserved keycodes are send to the host by
* putting constant data in all reserved places. For some reason, however, it
* doesn't work on Windows. Probably it is a problem with the descriptor, so
* it needs reviewing. Below it, is a simpler 256-bit descriptor. */
/*
static uint8_t PROGMEM keyboard_hid_report_desc[] = {
0x05, 0x01, // Usage Page (Generic Desktop),
0x09, 0x06, // Usage (Keyboard),
0xA1, 0x01, // Collection (Application),
0x75, 0x01, // Report Size (1),
0x95, 0x01, // Report Count (1),
0x81, 0x03, // Input (Constant), ; Reserved bit for usage id 00
0x05, 0x07, // Usage Page (Key Codes),
0x15, 0x00, // Logical Minimum (0),
0x25, 0x01, // Logical Maximum (1),
0x95, 0xA4, // Report Count (164),
0x19, 0x01, // Usage Minimum (1),
0x29, 0xA4, // Usage Maximum (164),
0x81, 0x02, // Input (Data, Variable, Absolute)
0x95, 0x0B, // Report Count (11),
0x81, 0x03, // Input (Constant), ; Reserved 11 bits for usage id A5-CF
0x95, 0x2E, // Report Count (46),
0x19, 0xB0, // Usage Minimum (176),
0x29, 0xDD, // Usage Maximum (221),
0x81, 0x02, // Input (Data, Variable, Absolute)
0x95, 0x02, // Report Count (2),
0x81, 0x03, // Input (Constant), ; Reserved 2 bits for usage id A5-CF
0x95, 0x08, // Report Count (8),
0x19, 0xE0, // Usage Minimum (224),
0x29, 0xE7, // Usage Maximum (231),
0x81, 0x02, // Input (Data, Variable, Absolute)
0x95, 0x18, // Report Count (24),
0x81, 0x03, // Input (Constant), ; 24 bits of padding to full 32 bytes
0x95, 0x05, // Report Count (5),
0x05, 0x08, // Usage Page (LEDs),
0x19, 0x01, // Usage Minimum (1),
0x29, 0x05, // Usage Maximum (5),
0x91, 0x02, // Output (Data, Variable, Absolute), ;LED report
0x95, 0x01, // Report Count (3),
0x91, 0x03, // Output (Constant), ;LED report padding
0xc0 // End Collection
};
*/
/* Boot protocol compliant report descriptor */
static const uint8_t PROGMEM keyboard_hid_report_desc[] = {
0x05, 0x01, // Usage Page (Generic Desktop),
0x09, 0x06, // Usage (Keyboard),
0xA1, 0x01, // Collection (Application),
0x75, 0x01, // Report Size (1),
0x95, 0x08, // Report Count (8),
0x05, 0x07, // Usage Page (Key Codes),
0x19, 0xE0, // Usage Minimum (224),
0x29, 0xE7, // Usage Maximum (231),
0x15, 0x00, // Logical Minimum (0),
0x25, 0x01, // Logical Maximum (1),
0x81, 0x02, // Input (Data, Variable, Absolute), ;Modifier byte
0x95, 0x01, // Report Count (1),
0x75, 0x08, // Report Size (8),
0x81, 0x03, // Input (Constant), ;Reserved byte
0x95, 0x05, // Report Count (5),
0x75, 0x01, // Report Size (1),
0x05, 0x08, // Usage Page (LEDs),
0x19, 0x01, // Usage Minimum (1),
0x29, 0x05, // Usage Maximum (5),
0x91, 0x02, // Output (Data, Variable, Absolute), ;LED report
0x95, 0x01, // Report Count (1),
0x75, 0x03, // Report Size (3),
0x91, 0x03, // Output (Constant), ;LED report padding
0x95, 0x06, // Report Count (6),
0x75, 0x08, // Report Size (8),
0x15, 0x00, // Logical Minimum (0),
0x25, 0x68, // Logical Maximum(104),
0x05, 0x07, // Usage Page (Key Codes),
0x19, 0x00, // Usage Minimum (0),
0x29, 0x68, // Usage Maximum (104),
0x81, 0x00, // Input (Data, Array),
0xc0 // End Collection
};
/* Simple 256-bit bitmap HID report descriptor. Bit on position i represents
* the state of key number i. This allows for reserved 1-byte keycodes to be
* sent to the host, which is not standard-compliant, so care has to be taken
* not to set these bits in firmware */
/*
static const uint8_t PROGMEM keyboard_hid_report_desc[] = {
0x05, 0x01, // Usage Page (Generic Desktop),
0x09, 0x06, // Usage (Keyboard),
0xA1, 0x01, // Collection (Application),
0x75, 0x01, // Report Size (1),
0x95, 50, // Report Count (50),
0x05, 0x07, // Usage Page (Key Codes),
0x19, 0x00, // Usage Minimum (0),
0x29, 49, // Usage Maximum (49),
0x15, 0x00, // Logical Minimum (0),
0x25, 0x01, // Logical Maximum (1),
0x81, 0x02, // Input (Data, Variable, Absolute), ;Modifier byte
0x95, 0x01, // Report Count (1),
0x81, 0x01, // Input (Constant)
0x95, 205, // Report Count (205),
0x19, 51, // Usage Minimum (51),
0x29, 0xff, // Usage Maximum (255),
0x81, 0x02, // Input (Data, Variable, Absolute), ;Modifier byte
0x95, 0x05, // Report Count (5),
0x75, 0x01, // Report Size (1),
0x05, 0x08, // Usage Page (LEDs),
0x19, 0x01, // Usage Minimum (1),
0x29, 0x05, // Usage Maximum (5),
0x91, 0x02, // Output (Data, Variable, Absolute), ;LED report
0x95, 0x01, // Report Count (1),
0x75, 0x03, // Report Size (3),
0x91, 0x03, // Output (Constant), ;LED report padding
0xc0 // End Collection
};
*/
#define CONFIG1_DESC_SIZE (9+9+9+7)
#define KEYBOARD_HID_DESC_OFFSET (9+9)
static const uint8_t PROGMEM config1_descriptor[CONFIG1_DESC_SIZE] = {
// configuration descriptor, USB spec 9.6.3, page 264-266, Table 9-10
9, // bLength;
2, // bDescriptorType;
LSB(CONFIG1_DESC_SIZE), // wTotalLength
MSB(CONFIG1_DESC_SIZE),
1, // bNumInterfaces
1, // bConfigurationValue
0, // iConfiguration
0xA0, // bmAttributes
50, // bMaxPower
/* HID keyboard */
// interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
9, // bLength
4, // bDescriptorType
KEYBOARD_INTERFACE, // bInterfaceNumber
0, // bAlternateSetting
1, // bNumEndpoints
0x03, // bInterfaceClass (0x03 = HID)
0x01, // bInterfaceSubClass (0x01 = Boot)
0x01, // bInterfaceProtocol (0x01 = Keyboard)
0, // iInterface
// HID interface descriptor, HID 1.11 spec, section 6.2.1
9, // bLength
0x21, // bDescriptorType
0x11, 0x01, // bcdHID
0, // bCountryCode
1, // bNumDescriptors
0x22, // bDescriptorType
sizeof(keyboard_hid_report_desc), // wDescriptorLength
0,
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
7, // bLength
5, // bDescriptorType
KEYBOARD_ENDPOINT | 0x80, // bEndpointAddress
0x03, // bmAttributes (0x03=intr)
KEYBOARD_SIZE, 0, // wMaxPacketSize
KEYBOARD_INTERVAL, // bInterval
};
struct usb_string_descriptor_struct {
uint8_t bLength;
uint8_t bDescriptorType;
int16_t wString[];
};
static const struct usb_string_descriptor_struct PROGMEM string0 = {
4,
3,
{0x0409}
};
static const struct usb_string_descriptor_struct PROGMEM string1 = {
sizeof(STR_MANUFACTURER),
3,
STR_MANUFACTURER
};
static const struct usb_string_descriptor_struct PROGMEM string2 = {
sizeof(STR_PRODUCT),
3,
STR_PRODUCT
};
// This table defines which descriptor data is sent for each specific
// request from the host (in wValue and wIndex).
static const struct descriptor_list_struct {
uint16_t wValue;
uint16_t wIndex;
const uint8_t *addr;
uint8_t length;
} PROGMEM descriptor_list[] = {
{0x0100, 0x0000, device_descriptor, sizeof(device_descriptor)},
{0x0200, 0x0000, config1_descriptor, sizeof(config1_descriptor)},
{0x2200, KEYBOARD_INTERFACE, keyboard_hid_report_desc, sizeof(keyboard_hid_report_desc)},
{0x2100, KEYBOARD_INTERFACE, config1_descriptor+KEYBOARD_HID_DESC_OFFSET, 9},
{0x0300, 0x0000, (const uint8_t *)&string0, 4},
{0x0301, 0x0409, (const uint8_t *)&string1, sizeof(STR_MANUFACTURER)},
{0x0302, 0x0409, (const uint8_t *)&string2, sizeof(STR_PRODUCT)}
};
#define NUM_DESC_LIST (sizeof(descriptor_list)/sizeof(struct descriptor_list_struct))