USB/pjrc/avr/usb_keyboard_debug.c

   1 /* USB Keyboard Plus Debug Channel Example for Teensy USB Development Board
   2  * http://www.pjrc.com/teensy/usb_keyboard.html
   3  * Copyright (c) 2009 PJRC.COM, LLC
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21  * THE SOFTWARE.
  22  */
  23
  24 // Version 1.0: Initial Release
  25 // Version 1.1: Add support for Teensy 2.0
  26
  27 #define USB_SERIAL_PRIVATE_INCLUDE
  28 #include "usb_keyboard_debug.h"
  29
  30 /**************************************************************************
  31  *
  32  *  Configurable Options
  33  *
  34  **************************************************************************/
  35
  36 // USB devices are supposed to implment a halt feature, which is
  37 // rarely (if ever) used.  If you comment this line out, the halt
  38 // code will be removed, saving 102 bytes of space (gcc 4.3.0).
  39 // This is not strictly USB compliant, but works with all major
  40 // operating systems.
  41 #define SUPPORT_ENDPOINT_HALT
  42
  43
  44
  45 /**************************************************************************
  46  *
  47  *  Endpoint Buffer Configuration
  48  *
  49  **************************************************************************/
  50
  51 #define ENDPOINT0_SIZE          32
  52
  53 #define KEYBOARD_INTERFACE      0
  54 #define KEYBOARD_ENDPOINT       3
  55 #define KEYBOARD_SIZE           8
  56 #define KEYBOARD_BUFFER         EP_DOUBLE_BUFFER
  57
  58 #define DEBUG_INTERFACE         1
  59 #define DEBUG_TX_ENDPOINT       4
  60 #define DEBUG_TX_SIZE           32
  61 #define DEBUG_TX_BUFFER         EP_DOUBLE_BUFFER
  62
  63 static const uint8_t PROGMEM endpoint_config_table[] = {
  64         0,
  65         0,
  66         1, EP_TYPE_INTERRUPT_IN,  EP_SIZE(KEYBOARD_SIZE) | KEYBOARD_BUFFER,
  67         1, EP_TYPE_INTERRUPT_IN,  EP_SIZE(DEBUG_TX_SIZE) | DEBUG_TX_BUFFER
  68 };
  69
  70
  71 /**************************************************************************
  72  *
  73  *  Descriptor Data
  74  *
  75  **************************************************************************/
  76
  77 // Descriptors are the data that your computer reads when it auto-detects
  78 // this USB device (called "enumeration" in USB lingo).  The most commonly
  79 // changed items are editable at the top of this file.  Changing things
  80 // in here should only be done by those who've read chapter 9 of the USB
  81 // spec and relevant portions of any USB class specifications!
  82
  83
  84 static const uint8_t PROGMEM device_descriptor[] = {
  85         18,                                     // bLength
  86         1,                                      // bDescriptorType
  87         0x00, 0x02,                             // bcdUSB
  88         0,                                      // bDeviceClass
  89         0,                                      // bDeviceSubClass
  90         0,                                      // bDeviceProtocol
  91         ENDPOINT0_SIZE,                         // bMaxPacketSize0
  92         LSB(VENDOR_ID), MSB(VENDOR_ID),         // idVendor
  93         LSB(PRODUCT_ID), MSB(PRODUCT_ID),       // idProduct
  94         0x00, 0x01,                             // bcdDevice
  95         1,                                      // iManufacturer
  96         2,                                      // iProduct
  97         3,                                      // iSerialNumber
  98         1                                       // bNumConfigurations
  99 };
 100
 101 // Keyboard Protocol 1, HID 1.11 spec, Appendix B, page 59-60
 102 static const uint8_t PROGMEM keyboard_hid_report_desc[] = {
 103         0x05, 0x01,          // Usage Page (Generic Desktop),
 104         0x09, 0x06,          // Usage (Keyboard),
 105         0xA1, 0x01,          // Collection (Application),
 106         0x75, 0x01,          //   Report Size (1),
 107         0x95, 0x08,          //   Report Count (8),
 108         0x05, 0x07,          //   Usage Page (Key Codes),
 109         0x19, 0xE0,          //   Usage Minimum (224),
 110         0x29, 0xE7,          //   Usage Maximum (231),
 111         0x15, 0x00,          //   Logical Minimum (0),
 112         0x25, 0x01,          //   Logical Maximum (1),
 113         0x81, 0x02,          //   Input (Data, Variable, Absolute), ;Modifier byte
 114         0x95, 0x01,          //   Report Count (1),
 115         0x75, 0x08,          //   Report Size (8),
 116         0x81, 0x03,          //   Input (Constant),                 ;Reserved byte
 117         0x95, 0x05,          //   Report Count (5),
 118         0x75, 0x01,          //   Report Size (1),
 119         0x05, 0x08,          //   Usage Page (LEDs),
 120         0x19, 0x01,          //   Usage Minimum (1),
 121         0x29, 0x05,          //   Usage Maximum (5),
 122         0x91, 0x02,          //   Output (Data, Variable, Absolute), ;LED report
 123         0x95, 0x01,          //   Report Count (1),
 124         0x75, 0x03,          //   Report Size (3),
 125         0x91, 0x03,          //   Output (Constant),                 ;LED report padding
 126         0x95, 0x06,          //   Report Count (6),
 127         0x75, 0x08,          //   Report Size (8),
 128         0x15, 0x00,          //   Logical Minimum (0),
 129         0x25, 0x68,          //   Logical Maximum(104),
 130         0x05, 0x07,          //   Usage Page (Key Codes),
 131         0x19, 0x00,          //   Usage Minimum (0),
 132         0x29, 0x68,          //   Usage Maximum (104),
 133         0x81, 0x00,          //   Input (Data, Array),
 134         0xc0                 // End Collection
 135 };
 136
 137 static const uint8_t PROGMEM debug_hid_report_desc[] = {
 138         //0x06, 0x30, 0xFF,                     // Usage Page 0xFF31 (vendor defined)
 139         0x06, 0x31, 0xFF,                       // Usage Page 0xFF31 (vendor defined)
 140         0x09, 0x74,                             // Usage 0x74
 141         0xA1, 0x53,                             // Collection 0x53
 142         0x75, 0x08,                             // report size = 8 bits
 143         0x15, 0x00,                             // logical minimum = 0
 144         0x26, 0xFF, 0x00,                       // logical maximum = 255
 145         0x95, DEBUG_TX_SIZE,                    // report count
 146         0x09, 0x75,                             // usage
 147         0x81, 0x02,                             // Input (array)
 148         0xC0                                    // end collection
 149 };
 150
 151 #define CONFIG1_DESC_SIZE        (9+9+9+7+9+9+7)
 152 #define KEYBOARD_HID_DESC_OFFSET (9+9)
 153 #define DEBUG_HID_DESC_OFFSET    (9+9+9+7+9)
 154 static const uint8_t PROGMEM config1_descriptor[CONFIG1_DESC_SIZE] = {
 155         // configuration descriptor, USB spec 9.6.3, page 264-266, Table 9-10
 156         9,                                      // bLength;
 157         2,                                      // bDescriptorType;
 158         LSB(CONFIG1_DESC_SIZE),                 // wTotalLength
 159         MSB(CONFIG1_DESC_SIZE),
 160         2,                                      // bNumInterfaces
 161         1,                                      // bConfigurationValue
 162         0,                                      // iConfiguration
 163         0xC0,                                   // bmAttributes
 164         50,                                     // bMaxPower
 165         // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
 166         9,                                      // bLength
 167         4,                                      // bDescriptorType
 168         KEYBOARD_INTERFACE,                     // bInterfaceNumber
 169         0,                                      // bAlternateSetting
 170         1,                                      // bNumEndpoints
 171         0x03,                                   // bInterfaceClass (0x03 = HID)
 172         0x01,                                   // bInterfaceSubClass (0x01 = Boot)
 173         0x01,                                   // bInterfaceProtocol (0x01 = Keyboard)
 174         0,                                      // iInterface
 175         // HID interface descriptor, HID 1.11 spec, section 6.2.1
 176         9,                                      // bLength
 177         0x21,                                   // bDescriptorType
 178         0x11, 0x01,                             // bcdHID
 179         0,                                      // bCountryCode
 180         1,                                      // bNumDescriptors
 181         0x22,                                   // bDescriptorType
 182         sizeof(keyboard_hid_report_desc),       // wDescriptorLength
 183         0,
 184         // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
 185         7,                                      // bLength
 186         5,                                      // bDescriptorType
 187         KEYBOARD_ENDPOINT | 0x80,               // bEndpointAddress
 188         0x03,                                   // bmAttributes (0x03=intr)
 189         KEYBOARD_SIZE, 0,                       // wMaxPacketSize
 190         1,                                      // bInterval
 191         // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
 192         9,                                      // bLength
 193         4,                                      // bDescriptorType
 194         DEBUG_INTERFACE,                        // bInterfaceNumber
 195         0,                                      // bAlternateSetting
 196         1,                                      // bNumEndpoints
 197         0x03,                                   // bInterfaceClass (0x03 = HID)
 198         0x00,                                   // bInterfaceSubClass
 199         0x00,                                   // bInterfaceProtocol
 200         0,                                      // iInterface
 201         // HID interface descriptor, HID 1.11 spec, section 6.2.1
 202         9,                                      // bLength
 203         0x21,                                   // bDescriptorType
 204         0x11, 0x01,                             // bcdHID
 205         0,                                      // bCountryCode
 206         1,                                      // bNumDescriptors
 207         0x22,                                   // bDescriptorType
 208         sizeof(debug_hid_report_desc),          // wDescriptorLength
 209         0,
 210         // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
 211         7,                                      // bLength
 212         5,                                      // bDescriptorType
 213         DEBUG_TX_ENDPOINT | 0x80,               // bEndpointAddress
 214         0x03,                                   // bmAttributes (0x03=intr)
 215         DEBUG_TX_SIZE, 0,                       // wMaxPacketSize
 216         1                                       // bInterval
 217 };
 218
 219 // If you're desperate for a little extra code memory, these strings
 220 // can be completely removed if iManufacturer, iProduct, iSerialNumber
 221 // in the device desciptor are changed to zeros.
 222 struct usb_string_descriptor_struct {
 223         uint8_t bLength;
 224         uint8_t bDescriptorType;
 225         int16_t wString[];
 226 };
 227 static const struct usb_string_descriptor_struct PROGMEM string0 = {
 228         4,
 229         3,
 230         {0x0409}
 231 };
 232 static const struct usb_string_descriptor_struct PROGMEM string1 = {
 233         sizeof(STR_MANUFACTURER),
 234         3,
 235         STR_MANUFACTURER
 236 };
 237 static const struct usb_string_descriptor_struct PROGMEM string2 = {
 238         sizeof(STR_PRODUCT),
 239         3,
 240         STR_PRODUCT
 241 };
 242 static const struct usb_string_descriptor_struct PROGMEM string3 = {
 243         sizeof(STR_SERIAL),
 244         3,
 245         STR_SERIAL
 246 };
 247
 248 // This table defines which descriptor data is sent for each specific
 249 // request from the host (in wValue and wIndex).
 250 static const struct descriptor_list_struct {
 251         uint16_t        wValue;
 252         uint16_t        wIndex;
 253         const uint8_t   *addr;
 254         uint8_t         length;
 255 } PROGMEM descriptor_list[] = {
 256         {0x0100, 0x0000, device_descriptor, sizeof(device_descriptor)},
 257         {0x0200, 0x0000, config1_descriptor, sizeof(config1_descriptor)},
 258         {0x2200, KEYBOARD_INTERFACE, keyboard_hid_report_desc, sizeof(keyboard_hid_report_desc)},
 259         {0x2100, KEYBOARD_INTERFACE, config1_descriptor+KEYBOARD_HID_DESC_OFFSET, 9},
 260         {0x2200, DEBUG_INTERFACE, debug_hid_report_desc, sizeof(debug_hid_report_desc)},
 261         {0x2100, DEBUG_INTERFACE, config1_descriptor+DEBUG_HID_DESC_OFFSET, 9},
 262         {0x0300, 0x0000, (const uint8_t *)&string0, 4},
 263         {0x0301, 0x0409, (const uint8_t *)&string1, sizeof(STR_MANUFACTURER)},
 264         {0x0302, 0x0409, (const uint8_t *)&string2, sizeof(STR_PRODUCT)},
 265         {0x0303, 0x0409, (const uint8_t *)&string3, sizeof(STR_SERIAL)}
 266 };
 267 #define NUM_DESC_LIST (sizeof(descriptor_list)/sizeof(struct descriptor_list_struct))
 268
 269
 270 /**************************************************************************
 271  *
 272  *  Variables - these are the only non-stack RAM usage
 273  *
 274  **************************************************************************/
 275
 276 // zero when we are not configured, non-zero when enumerated
 277 static volatile uint8_t usb_configuration=0;
 278
 279 // the time remaining before we transmit any partially full
 280 // packet, or send a zero length packet.
 281 static volatile uint8_t debug_flush_timer=0;
 282
 283
 284 /**************************************************************************
 285  *
 286  *  Public Functions - these are the API intended for the user
 287  *
 288  **************************************************************************/
 289
 290
 291 // initialize USB
 292 void usb_init(void)
 293 {
 294         HW_CONFIG();
 295         USB_FREEZE();                           // enable USB
 296         PLL_CONFIG();                           // config PLL
 297         while (!(PLLCSR & (1<<PLOCK))) ;        // wait for PLL lock
 298         USB_CONFIG();                           // start USB clock
 299         UDCON = 0;                              // enable attach resistor
 300         usb_configuration = 0;
 301         UDIEN = (1<<EORSTE)|(1<<SOFE);
 302         sei();
 303 }
 304
 305 // return 0 if the USB is not configured, or the configuration
 306 // number selected by the HOST
 307 uint8_t usb_configured(void)
 308 {
 309         return usb_configuration;
 310 }
 311
 312 // send the contents of USBKeys_Array and USBKeys_Modifiers
 313 int8_t usb_keyboard_send(void)
 314 {
 315         uint8_t i, intr_state, timeout;
 316
 317         if (!usb_configuration) return -1;
 318         intr_state = SREG;
 319         cli();
 320         UENUM = KEYBOARD_ENDPOINT;
 321         timeout = UDFNUML + 50;
 322         while (1) {
 323                 // are we ready to transmit?
 324                 if (UEINTX & (1<<RWAL)) break;
 325                 SREG = intr_state;
 326                 // has the USB gone offline?
 327                 if (!usb_configuration) return -1;
 328                 // have we waited too long?
 329                 if (UDFNUML == timeout) return -1;
 330                 // get ready to try checking again
 331                 intr_state = SREG;
 332                 cli();
 333                 UENUM = KEYBOARD_ENDPOINT;
 334         }
 335         UEDATX = USBKeys_Modifiers;
 336         UEDATX = 0;
 337         for (i=0; i<6; i++) {
 338                 UEDATX = USBKeys_Array[i];
 339         }
 340         UEINTX = 0x3A;
 341         USBKeys_Idle_Count = 0;
 342         SREG = intr_state;
 343         return 0;
 344 }
 345
 346 // transmit a character.  0 returned on success, -1 on error
 347 int8_t usb_debug_putchar(uint8_t c)
 348 {
 349         static uint8_t previous_timeout=0;
 350         uint8_t timeout, intr_state;
 351
 352         // if we're not online (enumerated and configured), error
 353         if (!usb_configuration) return -1;
 354         // interrupts are disabled so these functions can be
 355         // used from the main program or interrupt context,
 356         // even both in the same program!
 357         intr_state = SREG;
 358         cli();
 359         UENUM = DEBUG_TX_ENDPOINT;
 360         // if we gave up due to timeout before, don't wait again
 361         if (previous_timeout) {
 362                 if (!(UEINTX & (1<<RWAL))) {
 363                         SREG = intr_state;
 364                         return -1;
 365                 }
 366                 previous_timeout = 0;
 367         }
 368         // wait for the FIFO to be ready to accept data
 369         timeout = UDFNUML + 4;
 370         while (1) {
 371                 // are we ready to transmit?
 372                 if (UEINTX & (1<<RWAL)) break;
 373                 SREG = intr_state;
 374                 // have we waited too long?
 375                 if (UDFNUML == timeout) {
 376                         previous_timeout = 1;
 377                         return -1;
 378                 }
 379                 // has the USB gone offline?
 380                 if (!usb_configuration) return -1;
 381                 // get ready to try checking again
 382                 intr_state = SREG;
 383                 cli();
 384                 UENUM = DEBUG_TX_ENDPOINT;
 385         }
 386         // actually write the byte into the FIFO
 387         UEDATX = c;
 388         // if this completed a packet, transmit it now!
 389         if (!(UEINTX & (1<<RWAL))) {
 390                 UEINTX = 0x3A;
 391                 debug_flush_timer = 0;
 392         } else {
 393                 debug_flush_timer = 2;
 394         }
 395         SREG = intr_state;
 396         return 0;
 397 }
 398
 399
 400 // immediately transmit any buffered output.
 401 void usb_debug_flush_output(void)
 402 {
 403         uint8_t intr_state;
 404
 405         intr_state = SREG;
 406         cli();
 407         if (debug_flush_timer) {
 408                 UENUM = DEBUG_TX_ENDPOINT;
 409                 while ((UEINTX & (1<<RWAL))) {
 410                         UEDATX = 0;
 411                 }
 412                 UEINTX = 0x3A;
 413                 debug_flush_timer = 0;
 414         }
 415         SREG = intr_state;
 416 }
 417
 418
 419
 420 /**************************************************************************
 421  *
 422  *  Private Functions - not intended for general user consumption....
 423  *
 424  **************************************************************************/
 425
 426
 427
 428 // USB Device Interrupt - handle all device-level events
 429 // the transmit buffer flushing is triggered by the start of frame
 430 //
 431 ISR(USB_GEN_vect)
 432 {
 433         uint8_t intbits, t, i;
 434         static uint8_t div4=0;
 435
 436         intbits = UDINT;
 437         UDINT = 0;
 438         if (intbits & (1<<EORSTI)) {
 439                 UENUM = 0;
 440                 UECONX = 1;
 441                 UECFG0X = EP_TYPE_CONTROL;
 442                 UECFG1X = EP_SIZE(ENDPOINT0_SIZE) | EP_SINGLE_BUFFER;
 443                 UEIENX = (1<<RXSTPE);
 444                 usb_configuration = 0;
 445         }
 446         if ((intbits & (1<<SOFI)) && usb_configuration) {
 447                 t = debug_flush_timer;
 448                 if (t) {
 449                         debug_flush_timer = -- t;
 450                         if (!t) {
 451                                 UENUM = DEBUG_TX_ENDPOINT;
 452                                 while ((UEINTX & (1<<RWAL))) {
 453                                         UEDATX = 0;
 454                                 }
 455                                 UEINTX = 0x3A;
 456                         }
 457                 }
 458                 if (USBKeys_Idle_Config && (++div4 & 3) == 0) {
 459                         UENUM = KEYBOARD_ENDPOINT;
 460                         if (UEINTX & (1<<RWAL)) {
 461                                 USBKeys_Idle_Count++;
 462                                 if (USBKeys_Idle_Count == USBKeys_Idle_Config) {
 463                                         USBKeys_Idle_Count = 0;
 464                                         UEDATX = USBKeys_Modifiers;
 465                                         UEDATX = 0;
 466                                         for (i=0; i<6; i++) {
 467                                                 UEDATX = USBKeys_Array[i];
 468                                         }
 469                                         UEINTX = 0x3A;
 470                                 }
 471                         }
 472                 }
 473         }
 474 }
 475
 476
 477
 478 // Misc functions to wait for ready and send/receive packets
 479 static inline void usb_wait_in_ready(void)
 480 {
 481         while (!(UEINTX & (1<<TXINI))) ;
 482 }
 483 static inline void usb_send_in(void)
 484 {
 485         UEINTX = ~(1<<TXINI);
 486 }
 487 static inline void usb_wait_receive_out(void)
 488 {
 489         while (!(UEINTX & (1<<RXOUTI))) ;
 490 }
 491 static inline void usb_ack_out(void)
 492 {
 493         UEINTX = ~(1<<RXOUTI);
 494 }
 495
 496
 497
 498 // USB Endpoint Interrupt - endpoint 0 is handled here.  The
 499 // other endpoints are manipulated by the user-callable
 500 // functions, and the start-of-frame interrupt.
 501 //
 502 ISR(USB_COM_vect)
 503 {
 504         uint8_t intbits;
 505         const uint8_t *list;
 506         const uint8_t *cfg;
 507         uint8_t i, n, len, en;
 508         uint8_t bmRequestType;
 509         uint8_t bRequest;
 510         uint16_t wValue;
 511         uint16_t wIndex;
 512         uint16_t wLength;
 513         uint16_t desc_val;
 514         const uint8_t *desc_addr;
 515         uint8_t desc_length;
 516
 517         UENUM = 0;
 518         intbits = UEINTX;
 519         if (intbits & (1<<RXSTPI)) {
 520                 bmRequestType = UEDATX;
 521                 bRequest = UEDATX;
 522                 wValue = UEDATX;
 523                 wValue |= (UEDATX << 8);
 524                 wIndex = UEDATX;
 525                 wIndex |= (UEDATX << 8);
 526                 wLength = UEDATX;
 527                 wLength |= (UEDATX << 8);
 528                 UEINTX = ~((1<<RXSTPI) | (1<<RXOUTI) | (1<<TXINI));
 529                 if (bRequest == GET_DESCRIPTOR) {
 530                         list = (const uint8_t *)descriptor_list;
 531                         for (i=0; ; i++) {
 532                                 if (i >= NUM_DESC_LIST) {
 533                                         UECONX = (1<<STALLRQ)|(1<<EPEN);  //stall
 534                                         return;
 535                                 }
 536                                 desc_val = pgm_read_word(list);
 537                                 if (desc_val != wValue) {
 538                                         list += sizeof(struct descriptor_list_struct);
 539                                         continue;
 540                                 }
 541                                 list += 2;
 542                                 desc_val = pgm_read_word(list);
 543                                 if (desc_val != wIndex) {
 544                                         list += sizeof(struct descriptor_list_struct)-2;
 545                                         continue;
 546                                 }
 547                                 list += 2;
 548                                 desc_addr = (const uint8_t *)pgm_read_word(list);
 549                                 list += 2;
 550                                 desc_length = pgm_read_byte(list);
 551                                 break;
 552                         }
 553                         len = (wLength < 256) ? wLength : 255;
 554                         if (len > desc_length) len = desc_length;
 555                         do {
 556                                 // wait for host ready for IN packet
 557                                 do {
 558                                         i = UEINTX;
 559                                 } while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
 560                                 if (i & (1<<RXOUTI)) return;    // abort
 561                                 // send IN packet
 562                                 n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
 563                                 for (i = n; i; i--) {
 564                                         UEDATX = pgm_read_byte(desc_addr++);
 565                                 }
 566                                 len -= n;
 567                                 usb_send_in();
 568                         } while (len || n == ENDPOINT0_SIZE);
 569                         return;
 570                 }
 571                 if (bRequest == SET_ADDRESS) {
 572                         usb_send_in();
 573                         usb_wait_in_ready();
 574                         UDADDR = wValue | (1<<ADDEN);
 575                         return;
 576                 }
 577                 if (bRequest == SET_CONFIGURATION && bmRequestType == 0) {
 578                         usb_configuration = wValue;
 579                         usb_send_in();
 580                         cfg = endpoint_config_table;
 581                         for (i=1; i<5; i++) {
 582                                 UENUM = i;
 583                                 en = pgm_read_byte(cfg++);
 584                                 UECONX = en;
 585                                 if (en) {
 586                                         UECFG0X = pgm_read_byte(cfg++);
 587                                         UECFG1X = pgm_read_byte(cfg++);
 588                                 }
 589                         }
 590                         UERST = 0x1E;
 591                         UERST = 0;
 592                         return;
 593                 }
 594                 if (bRequest == GET_CONFIGURATION && bmRequestType == 0x80) {
 595                         usb_wait_in_ready();
 596                         UEDATX = usb_configuration;
 597                         usb_send_in();
 598                         return;
 599                 }
 600
 601                 if (bRequest == GET_STATUS) {
 602                         usb_wait_in_ready();
 603                         i = 0;
 604                         #ifdef SUPPORT_ENDPOINT_HALT
 605                         if (bmRequestType == 0x82) {
 606                                 UENUM = wIndex;
 607                                 if (UECONX & (1<<STALLRQ)) i = 1;
 608                                 UENUM = 0;
 609                         }
 610                         #endif
 611                         UEDATX = i;
 612                         UEDATX = 0;
 613                         usb_send_in();
 614                         return;
 615                 }
 616                 #ifdef SUPPORT_ENDPOINT_HALT
 617                 if ((bRequest == CLEAR_FEATURE || bRequest == SET_FEATURE)
 618                   && bmRequestType == 0x02 && wValue == 0) {
 619                         i = wIndex & 0x7F;
 620                         if (i >= 1 && i <= MAX_ENDPOINT) {
 621                                 usb_send_in();
 622                                 UENUM = i;
 623                                 if (bRequest == SET_FEATURE) {
 624                                         UECONX = (1<<STALLRQ)|(1<<EPEN);
 625                                 } else {
 626                                         UECONX = (1<<STALLRQC)|(1<<RSTDT)|(1<<EPEN);
 627                                         UERST = (1 << i);
 628                                         UERST = 0;
 629                                 }
 630                                 return;
 631                         }
 632                 }
 633                 #endif
 634                 if (wIndex == KEYBOARD_INTERFACE) {
 635                         if (bmRequestType == 0xA1) {
 636                                 if (bRequest == HID_GET_REPORT) {
 637                                         usb_wait_in_ready();
 638                                         UEDATX = USBKeys_Modifiers;
 639                                         UEDATX = 0;
 640                                         for (i=0; i<6; i++) {
 641                                                 UEDATX = USBKeys_Array[i];
 642                                         }
 643                                         usb_send_in();
 644                                         return;
 645                                 }
 646                                 if (bRequest == HID_GET_IDLE) {
 647                                         usb_wait_in_ready();
 648                                         UEDATX = USBKeys_Idle_Config;
 649                                         usb_send_in();
 650                                         return;
 651                                 }
 652                                 if (bRequest == HID_GET_PROTOCOL) {
 653                                         usb_wait_in_ready();
 654                                         UEDATX = USBKeys_Protocol;
 655                                         usb_send_in();
 656                                         return;
 657                                 }
 658                         }
 659                         if (bmRequestType == 0x21) {
 660                                 if (bRequest == HID_SET_REPORT) {
 661                                         usb_wait_receive_out();
 662                                         USBKeys_LEDs = UEDATX;
 663                                         usb_ack_out();
 664                                         usb_send_in();
 665                                         return;
 666                                 }
 667                                 if (bRequest == HID_SET_IDLE) {
 668                                         USBKeys_Idle_Config = (wValue >> 8);
 669                                         USBKeys_Idle_Count = 0;
 670                                         //usb_wait_in_ready();
 671                                         usb_send_in();
 672                                         return;
 673                                 }
 674                                 if (bRequest == HID_SET_PROTOCOL) {
 675                                         USBKeys_Protocol = wValue;
 676                                         //usb_wait_in_ready();
 677                                         usb_send_in();
 678                                         return;
 679                                 }
 680                         }
 681                 }
 682                 if (wIndex == DEBUG_INTERFACE) {
 683                         if (bRequest == HID_GET_REPORT && bmRequestType == 0xA1) {
 684                                 len = wLength;
 685                                 do {
 686                                         // wait for host ready for IN packet
 687                                         do {
 688                                                 i = UEINTX;
 689                                         } while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
 690                                         if (i & (1<<RXOUTI)) return;    // abort
 691                                         // send IN packet
 692                                         n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
 693                                         for (i = n; i; i--) {
 694                                                 UEDATX = 0;
 695                                         }
 696                                         len -= n;
 697                                         usb_send_in();
 698                                 } while (len || n == ENDPOINT0_SIZE);
 699                                 return;
 700                         }
 701                 }
 702         }
 703         UECONX = (1<<STALLRQ) | (1<<EPEN);      // stall
 704 }
 705