Setcom Corporation
USB device stack - modified
Fork of
USBDevice
by 
mbed official
Diff: USBHID/USBKeyboard.cpp
- Revision:
- 1:80ab0d068708
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHID/USBKeyboard.cpp Tue Jul 17 14:30:29 2012 +0000
@@ -0,0 +1,553 @@
+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+* and associated documentation files (the "Software"), to deal in the Software without
+* restriction, including without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all copies or
+* substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "stdint.h"
+
+#include "USBKeyboard.h"
+
+#define REPORT_ID_KEYBOARD 1
+#define REPORT_ID_VOLUME 3
+
+
+typedef struct {
+ unsigned char usage;
+ unsigned char modifier;
+} KEYMAP;
+
+#ifdef US_KEYBOARD
+/* US keyboard (as HID standard) */
+#define KEYMAP_SIZE (152)
+const KEYMAP keymap[KEYMAP_SIZE] = {
+ {0, 0}, /* NUL */
+ {0, 0}, /* SOH */
+ {0, 0}, /* STX */
+ {0, 0}, /* ETX */
+ {0, 0}, /* EOT */
+ {0, 0}, /* ENQ */
+ {0, 0}, /* ACK */
+ {0, 0}, /* BEL */
+ {0x2a, 0}, /* BS */ /* Keyboard Delete (Backspace) */
+ {0x2b, 0}, /* TAB */ /* Keyboard Tab */
+ {0x28, 0}, /* LF */ /* Keyboard Return (Enter) */
+ {0, 0}, /* VT */
+ {0, 0}, /* FF */
+ {0, 0}, /* CR */
+ {0, 0}, /* SO */
+ {0, 0}, /* SI */
+ {0, 0}, /* DEL */
+ {0, 0}, /* DC1 */
+ {0, 0}, /* DC2 */
+ {0, 0}, /* DC3 */
+ {0, 0}, /* DC4 */
+ {0, 0}, /* NAK */
+ {0, 0}, /* SYN */
+ {0, 0}, /* ETB */
+ {0, 0}, /* CAN */
+ {0, 0}, /* EM */
+ {0, 0}, /* SUB */
+ {0, 0}, /* ESC */
+ {0, 0}, /* FS */
+ {0, 0}, /* GS */
+ {0, 0}, /* RS */
+ {0, 0}, /* US */
+ {0x2c, 0}, /* */
+ {0x1e, KEY_SHIFT}, /* ! */
+ {0x34, KEY_SHIFT}, /* " */
+ {0x20, KEY_SHIFT}, /* # */
+ {0x21, KEY_SHIFT}, /* $ */
+ {0x22, KEY_SHIFT}, /* % */
+ {0x24, KEY_SHIFT}, /* & */
+ {0x34, 0}, /* ' */
+ {0x26, KEY_SHIFT}, /* ( */
+ {0x27, KEY_SHIFT}, /* ) */
+ {0x25, KEY_SHIFT}, /* * */
+ {0x2e, KEY_SHIFT}, /* + */
+ {0x36, 0}, /* , */
+ {0x2d, 0}, /* - */
+ {0x37, 0}, /* . */
+ {0x38, 0}, /* / */
+ {0x27, 0}, /* 0 */
+ {0x1e, 0}, /* 1 */
+ {0x1f, 0}, /* 2 */
+ {0x20, 0}, /* 3 */
+ {0x21, 0}, /* 4 */
+ {0x22, 0}, /* 5 */
+ {0x23, 0}, /* 6 */
+ {0x24, 0}, /* 7 */
+ {0x25, 0}, /* 8 */
+ {0x26, 0}, /* 9 */
+ {0x33, KEY_SHIFT}, /* : */
+ {0x33, 0}, /* ; */
+ {0x36, KEY_SHIFT}, /* < */
+ {0x2e, 0}, /* = */
+ {0x37, KEY_SHIFT}, /* > */
+ {0x38, KEY_SHIFT}, /* ? */
+ {0x1f, KEY_SHIFT}, /* @ */
+ {0x04, KEY_SHIFT}, /* A */
+ {0x05, KEY_SHIFT}, /* B */
+ {0x06, KEY_SHIFT}, /* C */
+ {0x07, KEY_SHIFT}, /* D */
+ {0x08, KEY_SHIFT}, /* E */
+ {0x09, KEY_SHIFT}, /* F */
+ {0x0a, KEY_SHIFT}, /* G */
+ {0x0b, KEY_SHIFT}, /* H */
+ {0x0c, KEY_SHIFT}, /* I */
+ {0x0d, KEY_SHIFT}, /* J */
+ {0x0e, KEY_SHIFT}, /* K */
+ {0x0f, KEY_SHIFT}, /* L */
+ {0x10, KEY_SHIFT}, /* M */
+ {0x11, KEY_SHIFT}, /* N */
+ {0x12, KEY_SHIFT}, /* O */
+ {0x13, KEY_SHIFT}, /* P */
+ {0x14, KEY_SHIFT}, /* Q */
+ {0x15, KEY_SHIFT}, /* R */
+ {0x16, KEY_SHIFT}, /* S */
+ {0x17, KEY_SHIFT}, /* T */
+ {0x18, KEY_SHIFT}, /* U */
+ {0x19, KEY_SHIFT}, /* V */
+ {0x1a, KEY_SHIFT}, /* W */
+ {0x1b, KEY_SHIFT}, /* X */
+ {0x1c, KEY_SHIFT}, /* Y */
+ {0x1d, KEY_SHIFT}, /* Z */
+ {0x2f, 0}, /* [ */
+ {0x31, 0}, /* \ */
+ {0x30, 0}, /* ] */
+ {0x23, KEY_SHIFT}, /* ^ */
+ {0x2d, KEY_SHIFT}, /* _ */
+ {0x35, 0}, /* ` */
+ {0x04, 0}, /* a */
+ {0x05, 0}, /* b */
+ {0x06, 0}, /* c */
+ {0x07, 0}, /* d */
+ {0x08, 0}, /* e */
+ {0x09, 0}, /* f */
+ {0x0a, 0}, /* g */
+ {0x0b, 0}, /* h */
+ {0x0c, 0}, /* i */
+ {0x0d, 0}, /* j */
+ {0x0e, 0}, /* k */
+ {0x0f, 0}, /* l */
+ {0x10, 0}, /* m */
+ {0x11, 0}, /* n */
+ {0x12, 0}, /* o */
+ {0x13, 0}, /* p */
+ {0x14, 0}, /* q */
+ {0x15, 0}, /* r */
+ {0x16, 0}, /* s */
+ {0x17, 0}, /* t */
+ {0x18, 0}, /* u */
+ {0x19, 0}, /* v */
+ {0x1a, 0}, /* w */
+ {0x1b, 0}, /* x */
+ {0x1c, 0}, /* y */
+ {0x1d, 0}, /* z */
+ {0x2f, KEY_SHIFT}, /* { */
+ {0x31, KEY_SHIFT}, /* | */
+ {0x30, KEY_SHIFT}, /* } */
+ {0x35, KEY_SHIFT}, /* ~ */
+ {0,0}, /* DEL */
+
+ {0x3a, 0}, /* F1 */
+ {0x3b, 0}, /* F2 */
+ {0x3c, 0}, /* F3 */
+ {0x3d, 0}, /* F4 */
+ {0x3e, 0}, /* F5 */
+ {0x3f, 0}, /* F6 */
+ {0x40, 0}, /* F7 */
+ {0x41, 0}, /* F8 */
+ {0x42, 0}, /* F9 */
+ {0x43, 0}, /* F10 */
+ {0x44, 0}, /* F11 */
+ {0x45, 0}, /* F12 */
+
+ {0x46, 0}, /* PRINT_SCREEN */
+ {0x47, 0}, /* SCROLL_LOCK */
+ {0x39, 0}, /* CAPS_LOCK */
+ {0x53, 0}, /* NUM_LOCK */
+ {0x49, 0}, /* INSERT */
+ {0x4a, 0}, /* HOME */
+ {0x4b, 0}, /* PAGE_UP */
+ {0x4e, 0}, /* PAGE_DOWN */
+
+ {0x4f, 0}, /* RIGHT_ARROW */
+ {0x50, 0}, /* LEFT_ARROW */
+ {0x51, 0}, /* DOWN_ARROW */
+ {0x52, 0}, /* UP_ARROW */
+};
+
+#else
+/* UK keyboard */
+#define KEYMAP_SIZE (152)
+const KEYMAP keymap[KEYMAP_SIZE] = {
+ {0, 0}, /* NUL */
+ {0, 0}, /* SOH */
+ {0, 0}, /* STX */
+ {0, 0}, /* ETX */
+ {0, 0}, /* EOT */
+ {0, 0}, /* ENQ */
+ {0, 0}, /* ACK */
+ {0, 0}, /* BEL */
+ {0x2a, 0}, /* BS */ /* Keyboard Delete (Backspace) */
+ {0x2b, 0}, /* TAB */ /* Keyboard Tab */
+ {0x28, 0}, /* LF */ /* Keyboard Return (Enter) */
+ {0, 0}, /* VT */
+ {0, 0}, /* FF */
+ {0, 0}, /* CR */
+ {0, 0}, /* SO */
+ {0, 0}, /* SI */
+ {0, 0}, /* DEL */
+ {0, 0}, /* DC1 */
+ {0, 0}, /* DC2 */
+ {0, 0}, /* DC3 */
+ {0, 0}, /* DC4 */
+ {0, 0}, /* NAK */
+ {0, 0}, /* SYN */
+ {0, 0}, /* ETB */
+ {0, 0}, /* CAN */
+ {0, 0}, /* EM */
+ {0, 0}, /* SUB */
+ {0, 0}, /* ESC */
+ {0, 0}, /* FS */
+ {0, 0}, /* GS */
+ {0, 0}, /* RS */
+ {0, 0}, /* US */
+ {0x2c, 0}, /* */
+ {0x1e, KEY_SHIFT}, /* ! */
+ {0x1f, KEY_SHIFT}, /* " */
+ {0x32, 0}, /* # */
+ {0x21, KEY_SHIFT}, /* $ */
+ {0x22, KEY_SHIFT}, /* % */
+ {0x24, KEY_SHIFT}, /* & */
+ {0x34, 0}, /* ' */
+ {0x26, KEY_SHIFT}, /* ( */
+ {0x27, KEY_SHIFT}, /* ) */
+ {0x25, KEY_SHIFT}, /* * */
+ {0x2e, KEY_SHIFT}, /* + */
+ {0x36, 0}, /* , */
+ {0x2d, 0}, /* - */
+ {0x37, 0}, /* . */
+ {0x38, 0}, /* / */
+ {0x27, 0}, /* 0 */
+ {0x1e, 0}, /* 1 */
+ {0x1f, 0}, /* 2 */
+ {0x20, 0}, /* 3 */
+ {0x21, 0}, /* 4 */
+ {0x22, 0}, /* 5 */
+ {0x23, 0}, /* 6 */
+ {0x24, 0}, /* 7 */
+ {0x25, 0}, /* 8 */
+ {0x26, 0}, /* 9 */
+ {0x33, KEY_SHIFT}, /* : */
+ {0x33, 0}, /* ; */
+ {0x36, KEY_SHIFT}, /* < */
+ {0x2e, 0}, /* = */
+ {0x37, KEY_SHIFT}, /* > */
+ {0x38, KEY_SHIFT}, /* ? */
+ {0x34, KEY_SHIFT}, /* @ */
+ {0x04, KEY_SHIFT}, /* A */
+ {0x05, KEY_SHIFT}, /* B */
+ {0x06, KEY_SHIFT}, /* C */
+ {0x07, KEY_SHIFT}, /* D */
+ {0x08, KEY_SHIFT}, /* E */
+ {0x09, KEY_SHIFT}, /* F */
+ {0x0a, KEY_SHIFT}, /* G */
+ {0x0b, KEY_SHIFT}, /* H */
+ {0x0c, KEY_SHIFT}, /* I */
+ {0x0d, KEY_SHIFT}, /* J */
+ {0x0e, KEY_SHIFT}, /* K */
+ {0x0f, KEY_SHIFT}, /* L */
+ {0x10, KEY_SHIFT}, /* M */
+ {0x11, KEY_SHIFT}, /* N */
+ {0x12, KEY_SHIFT}, /* O */
+ {0x13, KEY_SHIFT}, /* P */
+ {0x14, KEY_SHIFT}, /* Q */
+ {0x15, KEY_SHIFT}, /* R */
+ {0x16, KEY_SHIFT}, /* S */
+ {0x17, KEY_SHIFT}, /* T */
+ {0x18, KEY_SHIFT}, /* U */
+ {0x19, KEY_SHIFT}, /* V */
+ {0x1a, KEY_SHIFT}, /* W */
+ {0x1b, KEY_SHIFT}, /* X */
+ {0x1c, KEY_SHIFT}, /* Y */
+ {0x1d, KEY_SHIFT}, /* Z */
+ {0x2f, 0}, /* [ */
+ {0x64, 0}, /* \ */
+ {0x30, 0}, /* ] */
+ {0x23, KEY_SHIFT}, /* ^ */
+ {0x2d, KEY_SHIFT}, /* _ */
+ {0x35, 0}, /* ` */
+ {0x04, 0}, /* a */
+ {0x05, 0}, /* b */
+ {0x06, 0}, /* c */
+ {0x07, 0}, /* d */
+ {0x08, 0}, /* e */
+ {0x09, 0}, /* f */
+ {0x0a, 0}, /* g */
+ {0x0b, 0}, /* h */
+ {0x0c, 0}, /* i */
+ {0x0d, 0}, /* j */
+ {0x0e, 0}, /* k */
+ {0x0f, 0}, /* l */
+ {0x10, 0}, /* m */
+ {0x11, 0}, /* n */
+ {0x12, 0}, /* o */
+ {0x13, 0}, /* p */
+ {0x14, 0}, /* q */
+ {0x15, 0}, /* r */
+ {0x16, 0}, /* s */
+ {0x17, 0}, /* t */
+ {0x18, 0}, /* u */
+ {0x19, 0}, /* v */
+ {0x1a, 0}, /* w */
+ {0x1b, 0}, /* x */
+ {0x1c, 0}, /* y */
+ {0x1d, 0}, /* z */
+ {0x2f, KEY_SHIFT}, /* { */
+ {0x64, KEY_SHIFT}, /* | */
+ {0x30, KEY_SHIFT}, /* } */
+ {0x32, KEY_SHIFT}, /* ~ */
+ {0,0}, /* DEL */
+
+ {0x3a, 0}, /* F1 */
+ {0x3b, 0}, /* F2 */
+ {0x3c, 0}, /* F3 */
+ {0x3d, 0}, /* F4 */
+ {0x3e, 0}, /* F5 */
+ {0x3f, 0}, /* F6 */
+ {0x40, 0}, /* F7 */
+ {0x41, 0}, /* F8 */
+ {0x42, 0}, /* F9 */
+ {0x43, 0}, /* F10 */
+ {0x44, 0}, /* F11 */
+ {0x45, 0}, /* F12 */
+
+ {0x46, 0}, /* PRINT_SCREEN */
+ {0x47, 0}, /* SCROLL_LOCK */
+ {0x39, 0}, /* CAPS_LOCK */
+ {0x53, 0}, /* NUM_LOCK */
+ {0x49, 0}, /* INSERT */
+ {0x4a, 0}, /* HOME */
+ {0x4b, 0}, /* PAGE_UP */
+ {0x4e, 0}, /* PAGE_DOWN */
+
+ {0x4f, 0}, /* RIGHT_ARROW */
+ {0x50, 0}, /* LEFT_ARROW */
+ {0x51, 0}, /* DOWN_ARROW */
+ {0x52, 0}, /* UP_ARROW */
+};
+#endif
+
+uint8_t * USBKeyboard::reportDesc() {
+ static uint8_t reportDescriptor[] = {
+ USAGE_PAGE(1), 0x01, // Generic Desktop
+ USAGE(1), 0x06, // Keyboard
+ COLLECTION(1), 0x01, // Application
+ REPORT_ID(1), REPORT_ID_KEYBOARD,
+
+ USAGE_PAGE(1), 0x07, // Key Codes
+ USAGE_MINIMUM(1), 0xE0,
+ USAGE_MAXIMUM(1), 0xE7,
+ LOGICAL_MINIMUM(1), 0x00,
+ LOGICAL_MAXIMUM(1), 0x01,
+ REPORT_SIZE(1), 0x01,
+ REPORT_COUNT(1), 0x08,
+ INPUT(1), 0x02, // Data, Variable, Absolute
+ REPORT_COUNT(1), 0x01,
+ REPORT_SIZE(1), 0x08,
+ INPUT(1), 0x01, // Constant
+
+
+ REPORT_COUNT(1), 0x05,
+ REPORT_SIZE(1), 0x01,
+ USAGE_PAGE(1), 0x08, // LEDs
+ USAGE_MINIMUM(1), 0x01,
+ USAGE_MAXIMUM(1), 0x05,
+ OUTPUT(1), 0x02, // Data, Variable, Absolute
+ REPORT_COUNT(1), 0x01,
+ REPORT_SIZE(1), 0x03,
+ OUTPUT(1), 0x01, // Constant
+
+
+ REPORT_COUNT(1), 0x06,
+ REPORT_SIZE(1), 0x08,
+ LOGICAL_MINIMUM(1), 0x00,
+ LOGICAL_MAXIMUM(1), 0x65,
+ USAGE_PAGE(1), 0x07, // Key Codes
+ USAGE_MINIMUM(1), 0x00,
+ USAGE_MAXIMUM(1), 0x65,
+ INPUT(1), 0x00, // Data, Array
+ END_COLLECTION(0),
+
+ // Media Control
+ USAGE_PAGE(1), 0x0C,
+ USAGE(1), 0x01,
+ COLLECTION(1), 0x01,
+ REPORT_ID(1), REPORT_ID_VOLUME,
+ USAGE_PAGE(1), 0x0C,
+ LOGICAL_MINIMUM(1), 0x00,
+ LOGICAL_MAXIMUM(1), 0x01,
+ REPORT_SIZE(1), 0x01,
+ REPORT_COUNT(1), 0x07,
+ USAGE(1), 0xB5, // Next Track
+ USAGE(1), 0xB6, // Previous Track
+ USAGE(1), 0xB7, // Stop
+ USAGE(1), 0xCD, // Play / Pause
+ USAGE(1), 0xE2, // Mute
+ USAGE(1), 0xE9, // Volume Up
+ USAGE(1), 0xEA, // Volume Down
+ INPUT(1), 0x02, // Input (Data, Variable, Absolute)
+ REPORT_COUNT(1), 0x01,
+ INPUT(1), 0x01,
+ END_COLLECTION(0),
+ };
+ reportLength = sizeof(reportDescriptor);
+ return reportDescriptor;
+}
+
+
+bool USBKeyboard::EP1_OUT_callback() {
+ uint32_t bytesRead = 0;
+ uint8_t led[65];
+ USBDevice::readEP(EPINT_OUT, led, &bytesRead, MAX_HID_REPORT_SIZE);
+
+ // we take led[1] because led[0] is the report ID
+ lock_status = led[1] & 0x07;
+
+ // We activate the endpoint to be able to recceive data
+ if (!readStart(EPINT_OUT, MAX_HID_REPORT_SIZE))
+ return false;
+ return true;
+}
+
+uint8_t USBKeyboard::lockStatus() {
+ return lock_status;
+}
+
+int USBKeyboard::_putc(int c) {
+ return keyCode(c, keymap[c].modifier);
+}
+
+bool USBKeyboard::keyCode(uint8_t key, uint8_t modifier) {
+ // Send a simulated keyboard keypress. Returns true if successful.
+ HID_REPORT report;
+
+ report.data[0] = REPORT_ID_KEYBOARD;
+ report.data[1] = modifier;
+ report.data[2] = 0;
+ report.data[3] = keymap[key].usage;
+ report.data[4] = 0;
+ report.data[5] = 0;
+ report.data[6] = 0;
+ report.data[7] = 0;
+ report.data[8] = 0;
+
+ report.length = 9;
+
+ if (!send(&report)) {
+ return false;
+ }
+
+ report.data[1] = 0;
+ report.data[3] = 0;
+
+ if (!send(&report)) {
+ return false;
+ }
+
+ return true;
+
+}
+
+
+bool USBKeyboard::mediaControl(MEDIA_KEY key) {
+ HID_REPORT report;
+
+ report.data[0] = REPORT_ID_VOLUME;
+ report.data[1] = (1 << key) & 0x7f;
+
+ report.length = 2;
+
+ if (!send(&report)) {
+ return false;
+ }
+
+ report.data[0] = REPORT_ID_VOLUME;
+ report.data[1] = 0;
+
+ report.length = 2;
+
+ return send(&report);
+}
+
+
+#define DEFAULT_CONFIGURATION (1)
+#define TOTAL_DESCRIPTOR_LENGTH ((1 * CONFIGURATION_DESCRIPTOR_LENGTH) \
+ + (1 * INTERFACE_DESCRIPTOR_LENGTH) \
+ + (1 * HID_DESCRIPTOR_LENGTH) \
+ + (2 * ENDPOINT_DESCRIPTOR_LENGTH))
+
+uint8_t * USBKeyboard::configurationDesc() {
+ static uint8_t configurationDescriptor[] = {
+ CONFIGURATION_DESCRIPTOR_LENGTH,// bLength
+ CONFIGURATION_DESCRIPTOR, // bDescriptorType
+ LSB(TOTAL_DESCRIPTOR_LENGTH), // wTotalLength (LSB)
+ MSB(TOTAL_DESCRIPTOR_LENGTH), // wTotalLength (MSB)
+ 0x01, // bNumInterfaces
+ DEFAULT_CONFIGURATION, // bConfigurationValue
+ 0x00, // iConfiguration
+ C_RESERVED | C_SELF_POWERED, // bmAttributes
+ C_POWER(0), // bMaxPowerHello World from Mbed
+
+ INTERFACE_DESCRIPTOR_LENGTH, // bLength
+ INTERFACE_DESCRIPTOR, // bDescriptorType
+ 0x00, // bInterfaceNumber
+ 0x00, // bAlternateSetting
+ 0x02, // bNumEndpoints
+ HID_CLASS, // bInterfaceClass
+ 1, // bInterfaceSubClass
+ 1, // bInterfaceProtocol (keyboard)
+ 0x00, // iInterface
+
+ HID_DESCRIPTOR_LENGTH, // bLength
+ HID_DESCRIPTOR, // bDescriptorType
+ LSB(HID_VERSION_1_11), // bcdHID (LSB)
+ MSB(HID_VERSION_1_11), // bcdHID (MSB)
+ 0x00, // bCountryCode
+ 0x01, // bNumDescriptors
+ REPORT_DESCRIPTOR, // bDescriptorType
+ LSB(reportDescLength()), // wDescriptorLength (LSB)
+ MSB(reportDescLength()), // wDescriptorLength (MSB)
+
+ ENDPOINT_DESCRIPTOR_LENGTH, // bLength
+ ENDPOINT_DESCRIPTOR, // bDescriptorType
+ PHY_TO_DESC(EPINT_IN), // bEndpointAddress
+ E_INTERRUPT, // bmAttributes
+ LSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (LSB)
+ MSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (MSB)
+ 1, // bInterval (milliseconds)
+
+ ENDPOINT_DESCRIPTOR_LENGTH, // bLength
+ ENDPOINT_DESCRIPTOR, // bDescriptorType
+ PHY_TO_DESC(EPINT_OUT), // bEndpointAddress
+ E_INTERRUPT, // bmAttributes
+ LSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (LSB)
+ MSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (MSB)
+ 1, // bInterval (milliseconds)
+ };
+ return configurationDescriptor;
+}