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Teensy 4.1 core updated for C++20
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teensy-core-4.1/usb_serial_hid/usb_api.cpp

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  1. /* USB API for Teensy USB Development Board

  2.  * http://www.pjrc.com/teensy/teensyduino.html

  3.  * Copyright (c) 2008 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. #include <avr/io.h>

  25. #include <stdint.h>

  26. #include "usb_common.h"

  27. #include "usb_private.h"

  28. #include "usb_api.h"

  29. #include "wiring.h"

  30. 

  31. // Public Methods //////////////////////////////////////////////////////////////

  32. 

  33. void usb_serial_class::begin(long speed)

  34. {

  35. 	// make sure USB is initialized

  36. 	peek_buf = -1;

  37. 	usb_init();

  38. 	uint16_t begin_wait = (uint16_t)millis();

  39. 	while (1) {

  40. 		// wait for the host to finish enumeration

  41. 		if (usb_configuration) {

  42. 			delay(200);  // a little time for host to load a driver

  43. 			return;

  44. 		}

  45. 		// or for suspend mode (powered without USB)

  46. 		if (usb_suspended) {

  47. 			uint16_t begin_suspend = (uint16_t)millis();

  48. 			while (usb_suspended) {

  49. 				// must remain suspended for a while, because

  50. 				// normal USB enumeration causes brief suspend

  51. 				// states, typically under 0.1 second

  52. 				if ((uint16_t)millis() - begin_suspend > 250) {

  53. 					return;

  54. 				}

  55. 			}

  56. 		}

  57. 		// ... or a timout (powered by a USB power adaptor that

  58. 		// wiggles the data lines to keep a USB device charging)

  59. 		if ((uint16_t)millis() - begin_wait > 2500) return;

  60. 	}

  61. }

  62. 

  63. void usb_serial_class::end()

  64. {

  65. 	usb_shutdown();

  66. 	delay(25);

  67. }

  68. 

  69. // number of bytes available in the receive buffer

  70. int usb_serial_class::available()

  71. {

  72.         uint8_t n=0, i, intr_state;

  73. 

  74.         intr_state = SREG;

  75.         cli();

  76.         if (usb_configuration) {

  77.                 UENUM = CDC_RX_ENDPOINT;

  78.                 n = UEBCLX;

  79. 		if (!n) {

  80. 			i = UEINTX;

  81. 			if (i & (1<<RXOUTI) && !(i & (1<<RWAL))) UEINTX = 0x6B;

  82. 		}

  83.         }

  84.         SREG = intr_state;

  85. 	if (peek_buf >= 0 && n < 255) n++;

  86.         return n;

  87. }

  88. 

  89. int usb_serial_class::peek()

  90. {

  91. 	if (peek_buf < 0) peek_buf = read();

  92. 	return peek_buf;

  93. }

  94. 

  95. // get the next character, or -1 if nothing received

  96. int usb_serial_class::read(void)

  97. {

  98.         uint8_t c, intr_state;

  99. 

  100. 	if (peek_buf >= 0) {

  101. 		c = peek_buf;

  102. 		peek_buf = -1;

  103. 		return c;

  104. 	}

  105.         // interrupts are disabled so these functions can be

  106.         // used from the main program or interrupt context,

  107.         // even both in the same program!

  108.         intr_state = SREG;

  109.         cli();

  110.         if (!usb_configuration) {

  111.                 SREG = intr_state;

  112.                 return -1;

  113.         }

  114.         UENUM = CDC_RX_ENDPOINT;

  115. 	retry:

  116. 	c = UEINTX;

  117.         if (!(c & (1<<RWAL))) {

  118.                 // no data in buffer

  119. 		if (c & (1<<RXOUTI)) {

  120. 			UEINTX = 0x6B;

  121. 			goto retry;

  122. 		}

  123.                 SREG = intr_state;

  124.                 return -1;

  125.         }

  126.         // take one byte out of the buffer

  127.         c = UEDATX;

  128.         // if this drained the buffer, release it

  129.         if (!(UEINTX & (1<<RWAL))) UEINTX = 0x6B;

  130.         SREG = intr_state;

  131.         return c;

  132. }

  133. 

  134. // discard any buffered input

  135. void usb_serial_class::flush()

  136. {

  137.         uint8_t intr_state;

  138. 

  139.         if (usb_configuration) {

  140.                 intr_state = SREG;

  141.                 cli();

  142.                 UENUM = CDC_RX_ENDPOINT;

  143.                 while ((UEINTX & (1<<RWAL))) {

  144.                         UEINTX = 0x6B;

  145.                 }

  146.                 SREG = intr_state;

  147.         }

  148. 	peek_buf = -1;

  149. }

  150. #if 0

  151. // transmit a character.

  152. void usb_serial_class::write(uint8_t c)

  153. {

  154.         uint8_t timeout, intr_state;

  155. 

  156.         // if we're not online (enumerated and configured), error

  157.         if (!usb_configuration) return;

  158.         // interrupts are disabled so these functions can be

  159.         // used from the main program or interrupt context,

  160.         // even both in the same program!

  161.         intr_state = SREG;

  162.         cli();

  163.         UENUM = CDC_TX_ENDPOINT;

  164.         // if we gave up due to timeout before, don't wait again

  165.         if (transmit_previous_timeout) {

  166.                 if (!(UEINTX & (1<<RWAL))) {

  167.                         SREG = intr_state;

  168.                         return;

  169.                 }

  170.                 transmit_previous_timeout = 0;

  171.         }

  172.         // wait for the FIFO to be ready to accept data

  173.         timeout = UDFNUML + TRANSMIT_TIMEOUT;

  174.         while (1) {

  175.                 // are we ready to transmit?

  176.                 if (UEINTX & (1<<RWAL)) break;

  177.                 SREG = intr_state;

  178.                 // have we waited too long?  This happens if the user

  179.                 // is not running an application that is listening

  180.                 if (UDFNUML == timeout) {

  181.                         transmit_previous_timeout = 1;

  182.                         return;

  183.                 }

  184.                 // has the USB gone offline?

  185.                 if (!usb_configuration) return;

  186.                 // get ready to try checking again

  187.                 intr_state = SREG;

  188.                 cli();

  189.                 UENUM = CDC_TX_ENDPOINT;

  190.         }

  191.         // actually write the byte into the FIFO

  192.         UEDATX = c;

  193.         // if this completed a packet, transmit it now!

  194.         if (!(UEINTX & (1<<RWAL))) UEINTX = 0x3A;

  195.         transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;

  196.         SREG = intr_state;

  197. }

  198. #endif

  199. 

  200. 

  201. // transmit a block of data

  202. #if ARDUINO >= 100

  203. size_t usb_serial_class::write(const uint8_t *buffer, uint16_t size)

  204. #else

  205. #define setWriteError() 

  206. void usb_serial_class::write(const uint8_t *buffer, uint16_t size)

  207. #endif

  208. {

  209. 	uint8_t timeout, intr_state, write_size;

  210. #if ARDUINO >= 100

  211. 	size_t count=0;

  212. #endif

  213. 

  214. 	// if we're not online (enumerated and configured), error

  215. 	if (!usb_configuration) {

  216. 		setWriteError();

  217. 		goto end;

  218. 	}

  219. 	// interrupts are disabled so these functions can be

  220. 	// used from the main program or interrupt context,

  221. 	// even both in the same program!

  222. 	intr_state = SREG;

  223. 	cli();

  224. 	UENUM = CDC_TX_ENDPOINT;

  225. 	// if we gave up due to timeout before, don't wait again

  226. 	if (transmit_previous_timeout) {

  227. 		if (!(UEINTX & (1<<RWAL))) {

  228. 			SREG = intr_state;

  229. 			setWriteError();

  230. 			goto end;

  231. 		}

  232. 		transmit_previous_timeout = 0;

  233. 	}

  234. 	// each iteration of this loop transmits a packet

  235. 	while (size) {

  236. 		// wait for the FIFO to be ready to accept data

  237. 		timeout = UDFNUML + TRANSMIT_TIMEOUT;

  238. 		while (1) {

  239. 			// are we ready to transmit?

  240. 			if (UEINTX & (1<<RWAL)) break;

  241. 			SREG = intr_state;

  242. 			// have we waited too long?  This happens if the user

  243. 			// is not running an application that is listening

  244. 			if (UDFNUML == timeout) {

  245. 				transmit_previous_timeout = 1;

  246. 				setWriteError();

  247. 				goto end;

  248. 			}

  249. 			// has the USB gone offline?

  250. 			if (!usb_configuration) {

  251. 				setWriteError();

  252. 				goto end;

  253. 			}

  254. 			// get ready to try checking again

  255. 			intr_state = SREG;

  256. 			cli();

  257. 			UENUM = CDC_TX_ENDPOINT;

  258. 		}

  259. 

  260. 		// compute how many bytes will fit into the next packet

  261. 		write_size = CDC_TX_SIZE - UEBCLX;

  262. 		if (write_size > size) write_size = size;

  263. 		size -= write_size;

  264. #if ARDUINO >= 100

  265. 		count += write_size;

  266. #endif

  267. 

  268. #define ASM_COPY1(src, dest, tmp) "ld " tmp ", " src "\n\t" "st " dest ", " tmp "\n\t"

  269. #define ASM_COPY2(src, dest, tmp) ASM_COPY1(src, dest, tmp) ASM_COPY1(src, dest, tmp)

  270. #define ASM_COPY4(src, dest, tmp) ASM_COPY2(src, dest, tmp) ASM_COPY2(src, dest, tmp)

  271. #define ASM_COPY8(src, dest, tmp) ASM_COPY4(src, dest, tmp) ASM_COPY4(src, dest, tmp)

  272. 

  273. #if 1

  274. 		// write the packet

  275. 		do {

  276. 			uint8_t tmp;

  277. 			asm volatile(

  278. 			"L%=begin:"					"\n\t"

  279. 				"ldi	r30, %4"			"\n\t"

  280. 				"sub	r30, %3"			"\n\t"

  281. 				"cpi	r30, %4"			"\n\t"

  282. 				"brsh	L%=err"				"\n\t"

  283. 				"lsl	r30"				"\n\t"

  284. 				"clr	r31"				"\n\t"

  285. 				"subi	r30, lo8(-(pm(L%=table)))"	"\n\t"

  286. 				"sbci	r31, hi8(-(pm(L%=table)))"	"\n\t"

  287. 				"ijmp"					"\n\t"

  288. 			"L%=err:"					"\n\t"

  289. 				"rjmp	L%=end"				"\n\t"

  290. 			"L%=table:"					"\n\t"

  291. 				#if (CDC_TX_SIZE == 64)

  292. 				ASM_COPY8("Y+", "X", "%1")

  293. 				ASM_COPY8("Y+", "X", "%1")

  294. 				ASM_COPY8("Y+", "X", "%1")

  295. 				ASM_COPY8("Y+", "X", "%1")

  296. 				#endif

  297. 				#if (CDC_TX_SIZE >= 32)

  298. 				ASM_COPY8("Y+", "X", "%1")

  299. 				ASM_COPY8("Y+", "X", "%1")

  300. 				#endif

  301. 				#if (CDC_TX_SIZE >= 16)

  302. 				ASM_COPY8("Y+", "X", "%1")

  303. 				#endif

  304. 				ASM_COPY8("Y+", "X", "%1")

  305. 			"L%=end:"					"\n\t"

  306. 				: "+y" (buffer), "=r" (tmp)

  307. 				: "x" (&UEDATX), "r" (write_size), "M" (CDC_TX_SIZE)

  308. 				: "r30", "r31"

  309. 			);

  310. 		} while (0);

  311. #endif

  312. 		// if this completed a packet, transmit it now!

  313. 		if (!(UEINTX & (1<<RWAL))) UEINTX = 0x3A;

  314. 		transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;

  315. 	}

  316. 	SREG = intr_state;

  317. end:

  318. #if ARDUINO >= 100

  319. 	return count;

  320. #else

  321. 	return;

  322. #endif

  323. }

  324. 

  325. // transmit a string

  326. /*

  327. void usb_serial_class::write(const char *str)

  328. {

  329. 	uint16_t size=0;

  330. 	const char *p=str;

  331. 

  332. 	while (*p++) size++;

  333. 	if (size) write((const uint8_t *)str, size);

  334. }

  335. */

  336. 

  337. // These are Teensy-specific extensions to the Serial object

  338. 

  339. // immediately transmit any buffered output.

  340. // This doesn't actually transmit the data - that is impossible!

  341. // USB devices only transmit when the host allows, so the best

  342. // we can do is release the FIFO buffer for when the host wants it

  343. void usb_serial_class::send_now(void)

  344. {

  345.         uint8_t intr_state;

  346. 

  347.         intr_state = SREG;

  348.         cli();

  349.         if (usb_configuration && transmit_flush_timer) {

  350.                 UENUM = CDC_TX_ENDPOINT;

  351.                 UEINTX = 0x3A;

  352.                 transmit_flush_timer = 0;

  353.         }

  354.         SREG = intr_state;

  355. }

  356. 

  357. uint32_t usb_serial_class::baud(void)

  358. {

  359. 	return *(uint32_t *)cdc_line_coding;

  360. }

  361. 

  362. uint8_t usb_serial_class::stopbits(void)

  363. {

  364. 	return cdc_line_coding[4];

  365. }

  366. 

  367. uint8_t usb_serial_class::paritytype(void)

  368. {

  369. 	return cdc_line_coding[5];

  370. }

  371. 

  372. uint8_t usb_serial_class::numbits(void)

  373. {

  374. 	return cdc_line_coding[6];

  375. }

  376. 

  377. uint8_t usb_serial_class::dtr(void)

  378. {

  379. 	return (cdc_line_rtsdtr & USB_SERIAL_DTR) ? 1 : 0;

  380. }

  381. 

  382. uint8_t usb_serial_class::rts(void)

  383. {

  384. 	return (cdc_line_rtsdtr & USB_SERIAL_RTS) ? 1 : 0;

  385. }

  386. 

  387. usb_serial_class::operator bool()

  388. {

  389. 	if (usb_configuration &&

  390. 	  (cdc_line_rtsdtr & (USB_SERIAL_DTR | USB_SERIAL_RTS))) {

  391. 		return true;

  392. 	}

  393. 	return false;

  394. }

  395. 

  396. 

  397. 

  398. 

  399. // Step #1, decode UTF8 to Unicode code points

  400. //

  401. #if ARDUINO >= 100

  402. size_t usb_keyboard_class::write(uint8_t c)

  403. #else

  404. void usb_keyboard_class::write(uint8_t c)

  405. #endif

  406. {

  407. 	if (c < 0x80) {

  408. 		// single byte encoded, 0x00 to 0x7F

  409. 		utf8_state = 0;

  410. 		write_unicode(c);

  411. 	} else if (c < 0xC0) {

  412. 		// 2nd, 3rd or 4th byte, 0x80 to 0xBF

  413. 		c &= 0x3F;

  414. 		if (utf8_state == 1) {

  415. 			utf8_state = 0;

  416. 			write_unicode(unicode_wchar | c);

  417. 		} else if (utf8_state == 2) {

  418. 			unicode_wchar |= ((uint16_t)c << 6);

  419. 			utf8_state = 1;

  420. 		}

  421. 	} else if (c < 0xE0) {

  422. 		// begin 2 byte sequence, 0xC2 to 0xDF

  423. 		// or illegal 2 byte sequence, 0xC0 to 0xC1

  424. 		unicode_wchar = (uint16_t)(c & 0x1F) << 6;

  425. 		utf8_state = 1;

  426. 	} else if (c < 0xF0) {

  427. 		// begin 3 byte sequence, 0xE0 to 0xEF

  428. 		unicode_wchar = (uint16_t)(c & 0x0F) << 12;

  429. 		utf8_state = 2;

  430. 	} else {

  431. 		// begin 4 byte sequence (not supported), 0xF0 to 0xF4

  432. 		// or illegal, 0xF5 to 0xFF

  433. 		utf8_state = 255;

  434. 	}

  435. #if ARDUINO >= 100

  436. 	return 1;

  437. #endif

  438. }

  439. 

  440. 

  441. // Step #2: translate Unicode code point to keystroke sequence

  442. //

  443. KEYCODE_TYPE usb_keyboard_class::unicode_to_keycode(uint16_t cpoint)

  444. {

  445. 	// Unicode code points beyond U+FFFF are not supported

  446. 	// technically this input should probably be called UCS-2

  447. 	if (cpoint < 32) {

  448. 		if (cpoint == 10) return KEY_ENTER & 0x3FFF;

  449. 		return 0;

  450. 	}

  451. 	if (cpoint < 128) {

  452. 		if (sizeof(KEYCODE_TYPE) == 1) {

  453. 			return pgm_read_byte(keycodes_ascii + (cpoint - 0x20));

  454. 		} else if (sizeof(KEYCODE_TYPE) == 2) {

  455. 			return pgm_read_word(keycodes_ascii + (cpoint - 0x20));

  456. 		}

  457. 		return 0;

  458. 	}

  459. 	#ifdef ISO_8859_1_A0

  460. 	if (cpoint <= 0xA0) return 0;

  461. 	if (cpoint < 0x100) {

  462. 		if (sizeof(KEYCODE_TYPE) == 1) {

  463. 			return pgm_read_byte(keycodes_iso_8859_1 + (cpoint - 0xA0));

  464. 		} else if (sizeof(KEYCODE_TYPE) == 2) {

  465. 			return pgm_read_word(keycodes_iso_8859_1 + (cpoint - 0xA0));

  466. 		}

  467. 		return 0;

  468. 	}

  469. 	#endif

  470. 	//#ifdef UNICODE_20AC

  471. 	//if (cpoint == 0x20AC) return UNICODE_20AC & 0x3FFF;

  472. 	//#endif

  473. 	#ifdef KEYCODE_EXTRA00

  474. 	if (cpoint == UNICODE_EXTRA00) return KEYCODE_EXTRA00 & 0x3FFF;

  475. 	#endif

  476. 	#ifdef KEYCODE_EXTRA01

  477. 	if (cpoint == UNICODE_EXTRA01) return KEYCODE_EXTRA01 & 0x3FFF;

  478. 	#endif

  479. 	#ifdef KEYCODE_EXTRA02

  480. 	if (cpoint == UNICODE_EXTRA02) return KEYCODE_EXTRA02 & 0x3FFF;

  481. 	#endif

  482. 	#ifdef KEYCODE_EXTRA03

  483. 	if (cpoint == UNICODE_EXTRA03) return KEYCODE_EXTRA03 & 0x3FFF;

  484. 	#endif

  485. 	#ifdef KEYCODE_EXTRA04

  486. 	if (cpoint == UNICODE_EXTRA04) return KEYCODE_EXTRA04 & 0x3FFF;

  487. 	#endif

  488. 	#ifdef KEYCODE_EXTRA05

  489. 	if (cpoint == UNICODE_EXTRA05) return KEYCODE_EXTRA05 & 0x3FFF;

  490. 	#endif

  491. 	#ifdef KEYCODE_EXTRA06

  492. 	if (cpoint == UNICODE_EXTRA06) return KEYCODE_EXTRA06 & 0x3FFF;

  493. 	#endif

  494. 	#ifdef KEYCODE_EXTRA07

  495. 	if (cpoint == UNICODE_EXTRA07) return KEYCODE_EXTRA07 & 0x3FFF;

  496. 	#endif

  497. 	#ifdef KEYCODE_EXTRA08

  498. 	if (cpoint == UNICODE_EXTRA08) return KEYCODE_EXTRA08 & 0x3FFF;

  499. 	#endif

  500. 	#ifdef KEYCODE_EXTRA09

  501. 	if (cpoint == UNICODE_EXTRA09) return KEYCODE_EXTRA09 & 0x3FFF;

  502. 	#endif

  503. 	return 0;

  504. }

  505. 

  506. // Step #3: execute keystroke sequence

  507. //

  508. void usb_keyboard_class::write_keycode(KEYCODE_TYPE keycode)

  509. {

  510. 	if (!keycode) return;

  511. 	#ifdef DEADKEYS_MASK

  512. 	KEYCODE_TYPE deadkeycode = deadkey_to_keycode(keycode);

  513. 	if (deadkeycode) write_key(deadkeycode);

  514. 	#endif

  515. 	write_key(keycode);

  516. }

  517. 

  518. KEYCODE_TYPE usb_keyboard_class::deadkey_to_keycode(KEYCODE_TYPE keycode)

  519. {

  520. 	#ifdef DEADKEYS_MASK

  521. 	keycode &= DEADKEYS_MASK;

  522. 	if (keycode == 0) return 0;

  523. 	#ifdef ACUTE_ACCENT_BITS

  524. 	if (keycode == ACUTE_ACCENT_BITS) return DEADKEY_ACUTE_ACCENT;

  525. 	#endif

  526. 	#ifdef CEDILLA_BITS

  527. 	if (keycode == CEDILLA_BITS) return DEADKEY_CEDILLA;

  528. 	#endif

  529. 	#ifdef CIRCUMFLEX_BITS

  530. 	if (keycode == CIRCUMFLEX_BITS) return DEADKEY_CIRCUMFLEX;

  531. 	#endif

  532. 	#ifdef DIAERESIS_BITS

  533. 	if (keycode == DIAERESIS_BITS) return DEADKEY_DIAERESIS;

  534. 	#endif

  535. 	#ifdef GRAVE_ACCENT_BITS

  536. 	if (keycode == GRAVE_ACCENT_BITS) return DEADKEY_GRAVE_ACCENT;

  537. 	#endif

  538. 	#ifdef TILDE_BITS

  539. 	if (keycode == TILDE_BITS) return DEADKEY_TILDE;

  540. 	#endif

  541. 	#ifdef RING_ABOVE_BITS

  542. 	if (keycode == RING_ABOVE_BITS) return DEADKEY_RING_ABOVE;

  543. 	#endif

  544. 	#endif // DEADKEYS_MASK

  545. 	return 0;

  546. }

  547. 

  548. // Step #4: do each keystroke

  549. //

  550. void usb_keyboard_class::write_key(KEYCODE_TYPE keycode)

  551. {

  552. 	keyboard_report_data[0] = keycode_to_modifier(keycode);

  553. 	keyboard_report_data[1] = 0;

  554. 	keyboard_report_data[2] = keycode_to_key(keycode);

  555. 	keyboard_report_data[3] = 0;

  556. 	keyboard_report_data[4] = 0;

  557. 	keyboard_report_data[5] = 0;

  558. 	keyboard_report_data[6] = 0;

  559. 	keyboard_report_data[7] = 0;

  560. 	send_now();

  561. 	keyboard_report_data[0] = 0;

  562. 	keyboard_report_data[2] = 0;

  563. 	send_now();

  564. }

  565. 

  566. uint8_t usb_keyboard_class::keycode_to_modifier(KEYCODE_TYPE keycode)

  567. {

  568. 	uint8_t modifier=0;

  569. 

  570. 	#ifdef SHIFT_MASK

  571. 	if (keycode & SHIFT_MASK) modifier |= MODIFIERKEY_SHIFT;

  572. 	#endif

  573. 	#ifdef ALTGR_MASK

  574. 	if (keycode & ALTGR_MASK) modifier |= MODIFIERKEY_RIGHT_ALT;

  575. 	#endif

  576. 	#ifdef RCTRL_MASK

  577. 	if (keycode & RCTRL_MASK) modifier |= MODIFIERKEY_RIGHT_CTRL;

  578. 	#endif

  579. 	return modifier;

  580. }

  581. 

  582. uint8_t usb_keyboard_class::keycode_to_key(KEYCODE_TYPE keycode)

  583. {

  584. 	uint8_t key = keycode & 0x3F;

  585. 	#ifdef KEY_NON_US_100

  586. 	if (key == KEY_NON_US_100) key = 100;

  587. 	#endif

  588. 	return key;

  589. }

  590. 

  591. 

  592. 

  593. void usb_keyboard_class::set_modifier(uint8_t c)

  594. {

  595. 	keyboard_report_data[0] = c;

  596. }

  597. void usb_keyboard_class::set_key1(uint8_t c)

  598. {

  599. 	keyboard_report_data[2] = c;

  600. }

  601. void usb_keyboard_class::set_key2(uint8_t c)

  602. {

  603. 	keyboard_report_data[3] = c;

  604. }

  605. void usb_keyboard_class::set_key3(uint8_t c)

  606. {

  607. 	keyboard_report_data[4] = c;

  608. }

  609. void usb_keyboard_class::set_key4(uint8_t c)

  610. {

  611. 	keyboard_report_data[5] = c;

  612. }

  613. void usb_keyboard_class::set_key5(uint8_t c)

  614. {

  615. 	keyboard_report_data[6] = c;

  616. }

  617. void usb_keyboard_class::set_key6(uint8_t c)

  618. {

  619. 	keyboard_report_data[7] = c;

  620. }

  621. void usb_keyboard_class::set_media(uint8_t c)

  622. {

  623. 	keyboard_report_data[1] = c;

  624. }

  625. 

  626. 

  627. void usb_keyboard_class::send_now(void)

  628. {

  629.         uint8_t intr_state, timeout;

  630. 

  631.         if (!usb_configuration) return;

  632.         intr_state = SREG;

  633.         cli();

  634.         UENUM = KEYBOARD_ENDPOINT;

  635.         timeout = UDFNUML + 50;

  636.         while (1) {

  637.                 // are we ready to transmit?

  638.                 if (UEINTX & (1<<RWAL)) break;

  639.                 SREG = intr_state;

  640.                 // has the USB gone offline?

  641.                 if (!usb_configuration) return;

  642.                 // have we waited too long?

  643.                 if (UDFNUML == timeout) return;

  644.                 // get ready to try checking again

  645.                 intr_state = SREG;

  646.                 cli();

  647.                 UENUM = KEYBOARD_ENDPOINT;

  648.         }

  649.         UEDATX = keyboard_report_data[0];

  650.         UEDATX = keyboard_report_data[1];

  651.         UEDATX = keyboard_report_data[2];

  652.         UEDATX = keyboard_report_data[3];

  653.         UEDATX = keyboard_report_data[4];

  654.         UEDATX = keyboard_report_data[5];

  655.         UEDATX = keyboard_report_data[6];

  656.         UEDATX = keyboard_report_data[7];

  657.         UEINTX = 0x3A;

  658.         keyboard_idle_count = 0;

  659.         SREG = intr_state;

  660. }

  661. 

  662. 

  663. void usb_keyboard_class::press(uint16_t n)

  664. {

  665. 	uint8_t key, mod, msb, modrestore=0;

  666. 

  667. 	msb = n >> 8;

  668. 	if (msb >= 0xC2 && msb <= 0xDF) {

  669. 		n = (n & 0x3F) | ((uint16_t)(msb & 0x1F) << 6);

  670. 	} else

  671. 	if (msb == 0x80) {

  672. 		presskey(0, n);

  673. 		return;

  674. 	} else

  675. 	if (msb == 0x40) {

  676. 		presskey(n, 0);

  677. 		return;

  678. 	}

  679. 	KEYCODE_TYPE keycode = unicode_to_keycode(n);

  680. 	if (!keycode) return;

  681. 	#ifdef DEADKEYS_MASK

  682. 	KEYCODE_TYPE deadkeycode = deadkey_to_keycode(keycode);

  683. 	if (deadkeycode) {

  684. 		modrestore = keyboard_report_data[0];

  685. 		if (modrestore) {

  686. 			keyboard_report_data[0] = 0;

  687. 			send_now();

  688. 		}

  689. 		// TODO: test if operating systems recognize

  690. 		// deadkey sequences when other keys are held

  691. 		mod = keycode_to_modifier(deadkeycode);

  692. 		key = keycode_to_key(deadkeycode);

  693. 		presskey(key, mod);

  694. 		releasekey(key, mod);

  695. 	}

  696. 	#endif

  697. 	mod = keycode_to_modifier(keycode);

  698. 	key = keycode_to_key(keycode);

  699. 	presskey(key, mod | modrestore);

  700. }

  701. 

  702. void usb_keyboard_class::release(uint16_t n)

  703. {

  704. 	uint8_t key, mod, msb;

  705. 

  706. 	msb = n >> 8;

  707. 	if (msb >= 0xC2 && msb <= 0xDF) {

  708. 		n = (n & 0x3F) | ((uint16_t)(msb & 0x1F) << 6);

  709. 	} else

  710. 	if (msb == 0x80) {

  711. 		releasekey(0, n);

  712. 		return;

  713. 	} else

  714. 	if (msb == 0x40) {

  715. 		releasekey(n, 0);

  716. 		return;

  717. 	}

  718. 	KEYCODE_TYPE keycode = unicode_to_keycode(n);

  719. 	if (!keycode) return;

  720. 	mod = keycode_to_modifier(keycode);

  721. 	key = keycode_to_key(keycode);

  722. 	releasekey(key, mod);

  723. }

  724. 

  725. void usb_keyboard_class::presskey(uint8_t key, uint8_t modifier)

  726. {

  727. 	bool send_required = false;

  728. 	uint8_t i;

  729. 

  730. 	if (modifier) {

  731. 		if ((keyboard_report_data[0] & modifier) != modifier) {

  732. 			keyboard_report_data[0] |= modifier;

  733. 			send_required = true;

  734. 		}

  735. 	}

  736. 	if (key) {

  737. 		for (i=2; i < 8; i++) {

  738. 			if (keyboard_report_data[i] == key) goto end;

  739. 		}

  740. 		for (i=2; i < 8; i++) {

  741. 			if (keyboard_report_data[i] == 0) {

  742. 				keyboard_report_data[i] = key;

  743. 				send_required = true;

  744. 				goto end;

  745. 			}

  746. 		}

  747. 	}

  748. 	end:

  749. 	if (send_required) send_now();

  750. }

  751. 

  752. void usb_keyboard_class::releasekey(uint8_t key, uint8_t modifier)

  753. {

  754. 	bool send_required = false;

  755. 	uint8_t i;

  756. 

  757. 	if (modifier) {

  758. 		if ((keyboard_report_data[0] & modifier) != 0) {

  759. 			keyboard_report_data[0] &= ~modifier;

  760. 			send_required = true;

  761. 		}

  762. 	}

  763. 	if (key) {

  764. 		for (i=2; i < 8; i++) {

  765. 			if (keyboard_report_data[i] == key) {

  766. 				keyboard_report_data[i] = 0;

  767. 				send_required = true;

  768. 			}

  769. 		}

  770. 	}

  771. 	if (send_required) send_now();

  772. }

  773. 

  774. void usb_keyboard_class::releaseAll(void)

  775. {

  776. 	uint8_t i, anybits;

  777. 

  778. 	anybits = keyboard_report_data[0];

  779. 	for (i=2; i < 8; i++) {

  780. 		anybits |= keyboard_report_data[i];

  781. 		keyboard_report_data[i] = 0;

  782. 	}

  783. 	if (!anybits) return;

  784. 	keyboard_report_data[0] = 0;

  785. 	send_now();

  786. }

  787. 

  788. 

  789. 

  790. 

  791. 

  792. 

  793. void usb_mouse_class::move(int8_t x, int8_t y, int8_t wheel)

  794. {

  795.         uint8_t intr_state, timeout;

  796. 

  797.         if (!usb_configuration) return;

  798.         if (x == -128) x = -127;

  799.         if (y == -128) y = -127;

  800.         if (wheel == -128) wheel = -127;

  801.         intr_state = SREG;

  802.         cli();

  803.         UENUM = MOUSE_ENDPOINT;

  804.         timeout = UDFNUML + 50;

  805.         while (1) {

  806.                 // are we ready to transmit?

  807.                 if (UEINTX & (1<<RWAL)) break;

  808.                 SREG = intr_state;

  809.                 // has the USB gone offline?

  810.                 if (!usb_configuration) return;

  811.                 // have we waited too long?

  812.                 if (UDFNUML == timeout) return;

  813.                 // get ready to try checking again

  814.                 intr_state = SREG;

  815.                 cli();

  816.                 UENUM = MOUSE_ENDPOINT;

  817.         }

  818.         UEDATX = mouse_buttons;

  819.         UEDATX = x;

  820.         UEDATX = y;

  821.         UEDATX = wheel;

  822.         UEINTX = 0x3A;

  823.         SREG = intr_state;

  824. }

  825. 

  826. void usb_mouse_class::click(uint8_t b)

  827. {

  828.         mouse_buttons = (b & 7);

  829.         move(0, 0);

  830.         mouse_buttons = 0;

  831.         move(0, 0);

  832. }

  833. 

  834. void usb_mouse_class::scroll(int8_t wheel)

  835. {

  836.         move(0, 0, wheel);

  837. }

  838. 

  839. void usb_mouse_class::set_buttons(uint8_t left, uint8_t middle, uint8_t right)

  840. {

  841.         uint8_t mask=0;

  842. 

  843.         if (left) mask |= 1;

  844.         if (middle) mask |= 4;

  845.         if (right) mask |= 2;

  846.         mouse_buttons = mask;

  847.         move(0, 0);

  848. }

  849. 

  850. void usb_mouse_class::press(uint8_t b)

  851. {

  852.         uint8_t prev = mouse_buttons;

  853.         mouse_buttons |= (b & 7);

  854.         if (mouse_buttons != prev) move(0, 0);

  855. }

  856. 

  857. void usb_mouse_class::release(uint8_t b)

  858. {

  859.         uint8_t prev = mouse_buttons;

  860.         mouse_buttons &= ~(b & 7);

  861.         if (mouse_buttons != prev) move(0, 0);

  862. }

  863. 

  864. bool usb_mouse_class::isPressed(uint8_t b)

  865. {

  866.         return ((mouse_buttons & (b & 7)) != 0);

  867. }

  868. 

  869. 

  870. 

  871. void usb_joystick_class::send_now(void)

  872. {

  873.         uint8_t intr_state, timeout;

  874. 

  875.         if (!usb_configuration) return;

  876.         intr_state = SREG;

  877.         cli();

  878.         UENUM = JOYSTICK_ENDPOINT;

  879.         timeout = UDFNUML + 50;

  880.         while (1) {

  881.                 // are we ready to transmit?

  882.                 if (UEINTX & (1<<RWAL)) break;

  883.                 SREG = intr_state;

  884.                 // has the USB gone offline?

  885.                 if (!usb_configuration) return;

  886.                 // have we waited too long?

  887.                 if (UDFNUML == timeout) return;

  888.                 // get ready to try checking again

  889.                 intr_state = SREG;

  890.                 cli();

  891.                 UENUM = JOYSTICK_ENDPOINT;

  892.         }

  893.         UEDATX = joystick_report_data[0];

  894.         UEDATX = joystick_report_data[1];

  895.         UEDATX = joystick_report_data[2];

  896.         UEDATX = joystick_report_data[3];

  897.         UEDATX = joystick_report_data[4];

  898.         UEDATX = joystick_report_data[5];

  899.         UEDATX = joystick_report_data[6];

  900.         UEDATX = joystick_report_data[7];

  901.         UEDATX = joystick_report_data[8];

  902.         UEDATX = joystick_report_data[9];

  903.         UEDATX = joystick_report_data[10];

  904.         UEDATX = joystick_report_data[11];

  905.         UEINTX = 0x3A;

  906.         SREG = intr_state;

  907. }

  908. 

  909. 

  910. 

  911. 

  912. 

  913. 

  914. 

  915. // Preinstantiate Objects //////////////////////////////////////////////////////

  916. 

  917. usb_serial_class        Serial = usb_serial_class();

  918. usb_keyboard_class      Keyboard = usb_keyboard_class();

  919. usb_mouse_class         Mouse = usb_mouse_class();

  920. usb_joystick_class      Joystick = usb_joystick_class();