1 /* USB Keyboard and CDC Serial Device for Teensy USB Development Board
2 * Copyright (c) 2009 PJRC.COM, LLC
3 * Modifications by Jacob Alexander (2011-2014)
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:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
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
26 #include "usb_keyboard_serial.h"
30 // ----- Variables -----
32 // zero when we are not configured, non-zero when enumerated
33 static volatile uint8_t usb_configuration = 0;
35 // the time remaining before we transmit any partially full
36 // packet, or send a zero length packet.
37 static volatile uint8_t transmit_flush_timer = 0;
38 static uint8_t transmit_previous_timeout = 0;
40 // serial port settings (baud rate, control signals, etc) set
41 // by the PC. These are ignored, but kept in RAM.
42 static uint8_t cdc_line_coding[7] = {0x00, 0xE1, 0x00, 0x00, 0x00, 0x00, 0x08};
43 static uint8_t cdc_line_rtsdtr = 0;
47 // ----- USB Keyboard Functions -----
49 // Sends normal keyboard out to host
50 // NOTE: Make sure to match the descriptor
51 void usb_keyboard_toHost()
56 UEDATX = USBKeys_Modifiers;
61 // Normal Keys, only supports 6 in Boot mode
62 for ( i = 0; i < 6; i++)
64 UEDATX = USBKeys_Keys[i];
69 // send the contents of USBKeys_Keys and USBKeys_Modifiers
70 inline void usb_keyboard_send()
72 uint8_t intr_state, timeout;
75 timeout = UDFNUML + 50;
77 // Ready to transmit keypresses?
82 // has the USB gone offline? or exceeded timeout?
83 if ( !usb_configuration || UDFNUML == timeout )
85 erro_print("USB Offline? Timeout?");
89 // get ready to try checking again
93 // If not using Boot protocol, send NKRO
94 UENUM = USBKeys_Protocol ? KEYBOARD_NKRO_ENDPOINT : KEYBOARD_ENDPOINT;
95 } while ( !( UEINTX & (1 << RWAL) ) );
97 switch ( USBKeys_Protocol )
99 // Send boot keyboard interrupt packet(s)
101 usb_keyboard_toHost();
102 USBKeys_Changed = USBKeyChangeState_None;
105 // Send NKRO keyboard interrupts packet(s)
108 if ( USBKeys_Changed & USBKeyChangeState_Modifiers )
111 UEDATX = USBKeys_Modifiers;
112 UEINTX = 0; // Finished with ID
114 USBKeys_Changed &= ~USBKeyChangeState_Modifiers; // Mark sent
116 // Check main key section
117 else if ( USBKeys_Changed & USBKeyChangeState_MainKeys )
121 // 4-49 (first 6 bytes)
122 for ( uint8_t byte = 0; byte < 6; byte++ )
123 UEDATX = USBKeys_Keys[ byte ];
125 UEINTX = 0; // Finished with ID
127 USBKeys_Changed &= ~USBKeyChangeState_MainKeys; // Mark sent
129 // Check secondary key section
130 else if ( USBKeys_Changed & USBKeyChangeState_SecondaryKeys )
134 // 51-164 (Middle 15 bytes)
135 for ( uint8_t byte = 6; byte < 21; byte++ )
136 UEDATX = USBKeys_Keys[ byte ];
138 UEINTX = 0; // Finished with ID
140 USBKeys_Changed &= ~USBKeyChangeState_SecondaryKeys; // Mark sent
142 // Check tertiary key section
143 else if ( USBKeys_Changed & USBKeyChangeState_TertiaryKeys )
147 // 176-221 (last 6 bytes)
148 for ( uint8_t byte = 21; byte < 27; byte++ )
149 UEDATX = USBKeys_Keys[ byte ];
151 UEINTX = 0; // Finished with ID
153 USBKeys_Changed &= ~USBKeyChangeState_TertiaryKeys; // Mark sent
155 // Check system control keys
156 else if ( USBKeys_Changed & USBKeyChangeState_System )
159 UEDATX = USBKeys_SysCtrl;
160 UEINTX = 0; // Finished with ID
162 USBKeys_Changed &= ~USBKeyChangeState_System; // Mark sent
164 // Check consumer control keys
165 else if ( USBKeys_Changed & USBKeyChangeState_Consumer )
168 UEDATX = (uint8_t)(USBKeys_ConsCtrl & 0x00FF);
169 UEDATX = (uint8_t)(USBKeys_ConsCtrl >> 8);
170 UEINTX = 0; // Finished with ID
172 USBKeys_Changed &= ~USBKeyChangeState_Consumer; // Mark sent
178 USBKeys_Idle_Count = 0;
184 // ----- USB Virtual Serial Port (CDC) Functions -----
186 // get the next character, or -1 if nothing received
187 int16_t usb_serial_getchar()
189 uint8_t c, intr_state;
191 // interrupts are disabled so these functions can be
192 // used from the main program or interrupt context,
193 // even both in the same program!
196 if (!usb_configuration) {
200 UENUM = CDC_RX_ENDPOINT;
203 if (!(c & (1<<RWAL))) {
205 if (c & (1<<RXOUTI)) {
212 // take one byte out of the buffer
214 // if buffer completely used, release it
215 if (!(UEINTX & (1<<RWAL))) UEINTX = 0x6B;
220 // number of bytes available in the receive buffer
221 uint8_t usb_serial_available()
223 uint8_t n=0, i, intr_state;
227 if (usb_configuration) {
228 UENUM = CDC_RX_ENDPOINT;
232 if (i & (1<<RXOUTI) && !(i & (1<<RWAL))) UEINTX = 0x6B;
239 // discard any buffered input
240 void usb_serial_flush_input()
244 if (usb_configuration) {
247 UENUM = CDC_RX_ENDPOINT;
248 while ((UEINTX & (1<<RWAL))) {
255 // transmit a character. 0 returned on success, -1 on error
256 int8_t usb_serial_putchar(uint8_t c)
258 uint8_t timeout, intr_state;
260 // if we're not online (enumerated and configured), error
261 if (!usb_configuration) return -1;
262 // interrupts are disabled so these functions can be
263 // used from the main program or interrupt context,
264 // even both in the same program!
267 UENUM = CDC_TX_ENDPOINT;
268 // if we gave up due to timeout before, don't wait again
269 if (transmit_previous_timeout) {
270 if (!(UEINTX & (1<<RWAL))) {
274 transmit_previous_timeout = 0;
276 // wait for the FIFO to be ready to accept data
277 timeout = UDFNUML + TRANSMIT_TIMEOUT;
279 // are we ready to transmit?
280 if (UEINTX & (1<<RWAL)) break;
282 // have we waited too long? This happens if the user
283 // is not running an application that is listening
284 if (UDFNUML == timeout) {
285 transmit_previous_timeout = 1;
288 // has the USB gone offline?
289 if (!usb_configuration) return -1;
290 // get ready to try checking again
293 UENUM = CDC_TX_ENDPOINT;
295 // actually write the byte into the FIFO
297 // if this completed a packet, transmit it now!
298 if (!(UEINTX & (1<<RWAL))) UEINTX = 0x3A;
299 transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;
305 // transmit a character, but do not wait if the buffer is full,
306 // 0 returned on success, -1 on buffer full or error
307 int8_t usb_serial_putchar_nowait(uint8_t c)
311 if (!usb_configuration) return -1;
314 UENUM = CDC_TX_ENDPOINT;
315 if (!(UEINTX & (1<<RWAL))) {
320 // actually write the byte into the FIFO
322 // if this completed a packet, transmit it now!
323 if (!(UEINTX & (1<<RWAL))) UEINTX = 0x3A;
324 transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;
329 // transmit a buffer.
330 // 0 returned on success, -1 on error
331 // This function is optimized for speed! Each call takes approx 6.1 us overhead
332 // plus 0.25 us per byte. 12 Mbit/sec USB has 8.67 us per-packet overhead and
333 // takes 0.67 us per byte. If called with 64 byte packet-size blocks, this function
334 // can transmit at full USB speed using 43% CPU time. The maximum theoretical speed
335 // is 19 packets per USB frame, or 1216 kbytes/sec. However, bulk endpoints have the
336 // lowest priority, so any other USB devices will likely reduce the speed. Speed
337 // can also be limited by how quickly the PC-based software reads data, as the host
338 // controller in the PC will not allocate bandwitdh without a pending read request.
339 // (thanks to Victor Suarez for testing and feedback and initial code)
341 int8_t usb_serial_write(const char *buffer, uint16_t size)
343 uint8_t timeout, intr_state, write_size;
345 // if we're not online (enumerated and configured), error
346 if (!usb_configuration) return -1;
347 // interrupts are disabled so these functions can be
348 // used from the main program or interrupt context,
349 // even both in the same program!
352 UENUM = CDC_TX_ENDPOINT;
353 // if we gave up due to timeout before, don't wait again
355 if (transmit_previous_timeout) {
356 if (!(UEINTX & (1<<RWAL))) {
360 transmit_previous_timeout = 0;
363 // each iteration of this loop transmits a packet
365 // wait for the FIFO to be ready to accept data
366 timeout = UDFNUML + TRANSMIT_TIMEOUT;
368 // are we ready to transmit?
369 if (UEINTX & (1<<RWAL)) break;
371 // have we waited too long? This happens if the user
372 // is not running an application that is listening
373 if (UDFNUML == timeout) {
374 transmit_previous_timeout = 1;
377 // has the USB gone offline?
378 if (!usb_configuration) return -4;
379 // get ready to try checking again
382 UENUM = CDC_TX_ENDPOINT;
385 // compute how many bytes will fit into the next packet
386 write_size = CDC_TX_SIZE - UEBCLX;
387 if (write_size > size) write_size = size;
391 switch (write_size) {
392 #if (CDC_TX_SIZE == 64)
393 case 64: UEDATX = *buffer++;
394 case 63: UEDATX = *buffer++;
395 case 62: UEDATX = *buffer++;
396 case 61: UEDATX = *buffer++;
397 case 60: UEDATX = *buffer++;
398 case 59: UEDATX = *buffer++;
399 case 58: UEDATX = *buffer++;
400 case 57: UEDATX = *buffer++;
401 case 56: UEDATX = *buffer++;
402 case 55: UEDATX = *buffer++;
403 case 54: UEDATX = *buffer++;
404 case 53: UEDATX = *buffer++;
405 case 52: UEDATX = *buffer++;
406 case 51: UEDATX = *buffer++;
407 case 50: UEDATX = *buffer++;
408 case 49: UEDATX = *buffer++;
409 case 48: UEDATX = *buffer++;
410 case 47: UEDATX = *buffer++;
411 case 46: UEDATX = *buffer++;
412 case 45: UEDATX = *buffer++;
413 case 44: UEDATX = *buffer++;
414 case 43: UEDATX = *buffer++;
415 case 42: UEDATX = *buffer++;
416 case 41: UEDATX = *buffer++;
417 case 40: UEDATX = *buffer++;
418 case 39: UEDATX = *buffer++;
419 case 38: UEDATX = *buffer++;
420 case 37: UEDATX = *buffer++;
421 case 36: UEDATX = *buffer++;
422 case 35: UEDATX = *buffer++;
423 case 34: UEDATX = *buffer++;
424 case 33: UEDATX = *buffer++;
426 #if (CDC_TX_SIZE >= 32)
427 case 32: UEDATX = *buffer++;
428 case 31: UEDATX = *buffer++;
429 case 30: UEDATX = *buffer++;
430 case 29: UEDATX = *buffer++;
431 case 28: UEDATX = *buffer++;
432 case 27: UEDATX = *buffer++;
433 case 26: UEDATX = *buffer++;
434 case 25: UEDATX = *buffer++;
435 case 24: UEDATX = *buffer++;
436 case 23: UEDATX = *buffer++;
437 case 22: UEDATX = *buffer++;
438 case 21: UEDATX = *buffer++;
439 case 20: UEDATX = *buffer++;
440 case 19: UEDATX = *buffer++;
441 case 18: UEDATX = *buffer++;
442 case 17: UEDATX = *buffer++;
444 #if (CDC_TX_SIZE >= 16)
445 case 16: UEDATX = *buffer++;
446 case 15: UEDATX = *buffer++;
447 case 14: UEDATX = *buffer++;
448 case 13: UEDATX = *buffer++;
449 case 12: UEDATX = *buffer++;
450 case 11: UEDATX = *buffer++;
451 case 10: UEDATX = *buffer++;
452 case 9: UEDATX = *buffer++;
454 case 8: UEDATX = *buffer++;
455 case 7: UEDATX = *buffer++;
456 case 6: UEDATX = *buffer++;
457 case 5: UEDATX = *buffer++;
458 case 4: UEDATX = *buffer++;
459 case 3: UEDATX = *buffer++;
460 case 2: UEDATX = *buffer++;
462 case 1: UEDATX = *buffer++;
465 // if this completed a packet, transmit it now!
466 if (!(UEINTX & (1<<RWAL))) UEINTX = 0x3A;
467 transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;
473 // immediately transmit any buffered output.
474 // This doesn't actually transmit the data - that is impossible!
475 // USB devices only transmit when the host allows, so the best
476 // we can do is release the FIFO buffer for when the host wants it
477 void usb_serial_flush_output(void)
483 if (transmit_flush_timer) {
484 UENUM = CDC_TX_ENDPOINT;
486 transmit_flush_timer = 0;
491 // functions to read the various async serial settings. These
492 // aren't actually used by USB at all (communication is always
493 // at full USB speed), but they are set by the host so we can
494 // set them properly if we're converting the USB to a real serial
496 uint32_t usb_serial_get_baud()
498 uint32_t *baud = (uint32_t*)cdc_line_coding;
501 uint8_t usb_serial_get_stopbits()
503 return cdc_line_coding[4];
505 uint8_t usb_serial_get_paritytype()
507 return cdc_line_coding[5];
509 uint8_t usb_serial_get_numbits()
511 return cdc_line_coding[6];
513 uint8_t usb_serial_get_control()
515 return cdc_line_rtsdtr;
518 // write the control signals, DCD, DSR, RI, etc
519 // There is no CTS signal. If software on the host has transmitted
520 // data to you but you haven't been calling the getchar function,
521 // it remains buffered (either here or on the host) and can not be
522 // lost because you weren't listening at the right time, like it
523 // would in real serial communication.
524 int8_t usb_serial_set_control(uint8_t signals)
530 if (!usb_configuration) {
531 // we're not enumerated/configured
536 UENUM = CDC_ACM_ENDPOINT;
537 if (!(UEINTX & (1<<RWAL))) {
539 // TODO; should this try to abort the previously
540 // buffered message??
548 UEDATX = 0; // 0 seems to work nicely. what if this is 1??
560 // ----- General USB Functions -----
562 // Set the avr into firmware reload mode
563 void usb_device_reload()
566 // Disable watchdog, if enabled
567 // Disable all peripherals
570 USBCON = (1 << FRZCLK); // Disable USB
574 #if defined(__AVR_AT90USB162__) // Teensy 1.0
575 EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
576 TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
577 DDRB = 0; DDRC = 0; DDRD = 0;
578 PORTB = 0; PORTC = 0; PORTD = 0;
579 asm volatile("jmp 0x3E00");
580 #elif defined(__AVR_ATmega32U4__) // Teensy 2.0
581 EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
582 TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
583 DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
584 PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
585 asm volatile("jmp 0x7E00");
586 #elif defined(__AVR_AT90USB646__) // Teensy++ 1.0
587 EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
588 TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
589 DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
590 PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
591 asm volatile("jmp 0xFC00");
592 #elif defined(__AVR_AT90USB1286__) // Teensy++ 2.0
593 EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
594 TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
595 DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
596 PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
597 asm volatile("jmp 0x1FC00");
602 // WDT Setup for software reset the chip
614 USB_FREEZE(); // enable USB
615 PLL_CONFIG(); // config PLL
616 while (!(PLLCSR & (1<<PLOCK))) ; // wait for PLL lock
617 USB_CONFIG(); // start USB clock
618 UDCON = 0; // enable attach resistor
619 usb_configuration = 0;
620 UDIEN = (1<<EORSTE) | (1<<SOFE);
623 // Disable watchdog timer after possible software reset
624 //wdt_init(); // XXX Not working...seems to be ok without this, not sure though
627 // return 0 if the USB is not configured, or the configuration
628 // number selected by the HOST
629 uint8_t usb_configured()
631 return usb_configuration;
634 // USB Device Interrupt - handle all device-level events
635 // the transmit buffer flushing is triggered by the start of frame
639 uint8_t intbits, t_cdc;
643 if ( intbits & (1 << EORSTI) )
647 UECFG0X = EP_TYPE_CONTROL;
648 UECFG1X = EP_SIZE(ENDPOINT0_SIZE) | EP_SINGLE_BUFFER;
649 UEIENX = (1 << RXSTPE);
650 usb_configuration = 0;
653 if ( (intbits & (1 << SOFI)) && usb_configuration )
655 t_cdc = transmit_flush_timer;
658 transmit_flush_timer = --t_cdc;
661 UENUM = CDC_TX_ENDPOINT;
665 static uint8_t div4 = 0;
666 if ( USBKeys_Idle_Config && (++div4 & 3) == 0 )
668 USBKeys_Idle_Count++;
669 if ( USBKeys_Idle_Count == USBKeys_Idle_Config )
671 // XXX TODO Is this even used? If so, when? -Jacob
672 // From hasu's code, this section looks like it could fix the Mac SET_IDLE problem
673 // Send normal keyboard interrupt packet(s)
674 switch ( USBKeys_Protocol )
676 // Send boot keyboard interrupt packet(s)
677 case 0: usb_keyboard_toHost(); break;
678 // Send NKRO keyboard interrupts packet(s)
679 //case 1: usb_nkrokeyboard_toHost(); break; // XXX Not valid anymore
689 // Misc functions to wait for ready and send/receive packets
690 static inline void usb_wait_in_ready()
692 while (!(UEINTX & (1<<TXINI))) ;
694 static inline void usb_send_in()
696 UEINTX = ~(1<<TXINI);
698 static inline void usb_wait_receive_out()
700 while (!(UEINTX & (1<<RXOUTI))) ;
702 static inline void usb_ack_out()
704 UEINTX = ~(1<<RXOUTI);
709 // USB Endpoint Interrupt - endpoint 0 is handled here. The
710 // other endpoints are manipulated by the user-callable
711 // functions, and the start-of-frame interrupt.
718 uint8_t i, n, len, en;
720 uint8_t bmRequestType;
726 const uint8_t *desc_addr;
731 if (intbits & (1<<RXSTPI))
733 bmRequestType = UEDATX;
736 wValue |= (UEDATX << 8);
738 wIndex |= (UEDATX << 8);
740 wLength |= (UEDATX << 8);
741 UEINTX = ~((1<<RXSTPI) | (1<<RXOUTI) | (1<<TXINI));
743 if ( bRequest == GET_DESCRIPTOR )
745 list = (const uint8_t *)descriptor_list;
748 if ( i >= NUM_DESC_LIST )
750 UECONX = (1 << STALLRQ) | (1 << EPEN); //stall
753 desc_val = pgm_read_word(list);
754 if ( desc_val != wValue )
756 list += sizeof( struct descriptor_list_struct );
760 desc_val = pgm_read_word(list);
761 if ( desc_val != wIndex )
763 list += sizeof(struct descriptor_list_struct) - 2;
767 desc_addr = (const uint8_t *)pgm_read_word(list);
769 desc_length = pgm_read_byte(list);
772 len = (wLength < 256) ? wLength : 255;
773 if (len > desc_length) len = desc_length;
775 // wait for host ready for IN packet
778 } while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
779 if (i & (1<<RXOUTI)) return; // abort
781 n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
782 for (i = n; i; i--) {
783 UEDATX = pgm_read_byte(desc_addr++);
787 } while (len || n == ENDPOINT0_SIZE);
791 if (bRequest == SET_ADDRESS) {
794 UDADDR = wValue | (1<<ADDEN);
798 if ( bRequest == SET_CONFIGURATION && bmRequestType == 0 )
800 usb_configuration = wValue;
802 transmit_flush_timer = 0;
804 cfg = endpoint_config_table;
805 // Setup each of the 6 additional endpoints (0th already configured)
806 for ( i = 1; i < 6; i++ )
809 en = pgm_read_byte(cfg++);
813 UECFG0X = pgm_read_byte(cfg++);
814 UECFG1X = pgm_read_byte(cfg++);
822 if (bRequest == GET_CONFIGURATION && bmRequestType == 0x80) {
824 UEDATX = usb_configuration;
829 if ( ( wIndex == KEYBOARD_INTERFACE && USBKeys_Protocol == 0 )
830 || ( wIndex == KEYBOARD_NKRO_INTERFACE && USBKeys_Protocol == 1 ) )
832 if ( bmRequestType == 0xA1)
834 if ( bRequest == HID_GET_REPORT )
838 // Send normal keyboard interrupt packet(s)
839 switch ( USBKeys_Protocol )
841 // Send boot keyboard interrupt packet(s)
842 case 0: usb_keyboard_toHost(); break;
843 // Send NKRO keyboard interrupts packet(s)
844 //case 1: usb_nkrokeyboard_toHost(); break; // XXX Not valid anymore
850 if ( bRequest == HID_GET_IDLE )
853 UEDATX = USBKeys_Idle_Config;
857 if ( bRequest == HID_GET_PROTOCOL )
860 UEDATX = USBKeys_Protocol;
865 if ( bmRequestType == 0x21 )
867 if ( bRequest == HID_SET_REPORT )
869 usb_wait_receive_out();
870 USBKeys_LEDs = UEDATX;
875 if ( bRequest == HID_SET_IDLE )
878 USBKeys_Idle_Config = (wValue >> 8);
879 USBKeys_Idle_Count = 0;
884 if ( bRequest == HID_SET_PROTOCOL )
887 USBKeys_Protocol = wValue; // 0 - Boot Mode, 1 - NKRO Mode
895 if (bRequest == CDC_GET_LINE_CODING && bmRequestType == 0xA1) {
898 for (i=0; i<7; i++) {
905 if (bRequest == CDC_SET_LINE_CODING && bmRequestType == 0x21) {
906 usb_wait_receive_out();
908 for (i=0; i<7; i++) {
916 if (bRequest == CDC_SET_CONTROL_LINE_STATE && bmRequestType == 0x21) {
917 cdc_line_rtsdtr = wValue;
923 if (bRequest == GET_STATUS) {
926 if (bmRequestType == 0x82) {
928 if (UECONX & (1<<STALLRQ)) i = 1;
937 if ((bRequest == CLEAR_FEATURE || bRequest == SET_FEATURE)
938 && bmRequestType == 0x02 && wValue == 0) {
940 if (i >= 1 && i <= MAX_ENDPOINT) {
943 if (bRequest == SET_FEATURE) {
944 UECONX = (1<<STALLRQ)|(1<<EPEN);
946 UECONX = (1<<STALLRQC)|(1<<RSTDT)|(1<<EPEN);
954 UECONX = (1 << STALLRQ) | (1 << EPEN); // stall