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[pub/USBasp.git] / LUFA / Drivers / USB / LowLevel / Endpoint.h
1 /*
2 LUFA Library
3 Copyright (C) Dean Camera, 2009.
4
5 dean [at] fourwalledcubicle [dot] com
6 www.fourwalledcubicle.com
7 */
8
9 /*
10 Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
11
12 Permission to use, copy, modify, and distribute this software
13 and its documentation for any purpose and without fee is hereby
14 granted, provided that the above copyright notice appear in all
15 copies and that both that the copyright notice and this
16 permission notice and warranty disclaimer appear in supporting
17 documentation, and that the name of the author not be used in
18 advertising or publicity pertaining to distribution of the
19 software without specific, written prior permission.
20
21 The author disclaim all warranties with regard to this
22 software, including all implied warranties of merchantability
23 and fitness. In no event shall the author be liable for any
24 special, indirect or consequential damages or any damages
25 whatsoever resulting from loss of use, data or profits, whether
26 in an action of contract, negligence or other tortious action,
27 arising out of or in connection with the use or performance of
28 this software.
29 */
30
31 /** \ingroup Group_USB
32 * @defgroup Group_EndpointManagement Endpoint Management
33 *
34 * Functions, macros and enums related to endpoint management when in USB Device mode. This
35 * module contains the endpoint management macros, as well as endpoint interrupt and data
36 * send/recieve functions for various data types.
37 *
38 * @{
39 */
40
41 /** @defgroup Group_EndpointRW Endpoint Data Reading and Writing
42 *
43 * Functions, macros, variables, enums and types related to data reading and writing from and to endpoints.
44 */
45
46 /** @defgroup Group_EndpointPacketManagement Endpoint Packet Management
47 *
48 * Functions, macros, variables, enums and types related to packet management of endpoints.
49 */
50
51 #ifndef __ENDPOINT_H__
52 #define __ENDPOINT_H__
53
54 /* Includes: */
55 #include <avr/io.h>
56 #include <stdbool.h>
57
58 #include "../../../Common/Common.h"
59 #include "../HighLevel/USBTask.h"
60
61 #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
62 #include "../HighLevel/StreamCallbacks.h"
63 #endif
64
65 /* Enable C linkage for C++ Compilers: */
66 #if defined(__cplusplus)
67 extern "C" {
68 #endif
69
70 /* Public Interface - May be used in end-application: */
71 /* Macros: */
72 /** Endpoint data direction mask for \ref Endpoint_ConfigureEndpoint(). This indicates that the endpoint
73 * should be initialized in the OUT direction - i.e. data flows from host to device.
74 */
75 #define ENDPOINT_DIR_OUT (0 << EPDIR)
76
77 /** Endpoint data direction mask for \ref Endpoint_ConfigureEndpoint(). This indicates that the endpoint
78 * should be initialized in the IN direction - i.e. data flows from device to host.
79 */
80 #define ENDPOINT_DIR_IN (1 << EPDIR)
81
82 /** Mask for the bank mode selection for the \ref Endpoint_ConfigureEndpoint() macro. This indicates
83 * that the endpoint should have one single bank, which requires less USB FIFO memory but results
84 * in slower transfers as only one USB device (the AVR or the host) can access the endpoint's
85 * bank at the one time.
86 */
87 #define ENDPOINT_BANK_SINGLE (0 << EPBK0)
88
89 /** Mask for the bank mode selection for the \ref Endpoint_ConfigureEndpoint() macro. This indicates
90 * that the endpoint should have two banks, which requires more USB FIFO memory but results
91 * in faster transfers as one USB device (the AVR or the host) can access one bank while the other
92 * accesses the second bank.
93 */
94 #define ENDPOINT_BANK_DOUBLE (1 << EPBK0)
95
96 /** Endpoint address for the default control endpoint, which always resides in address 0. This is
97 * defined for convenience to give more readable code when used with the endpoint macros.
98 */
99 #define ENDPOINT_CONTROLEP 0
100
101 #if (!defined(FIXED_CONTROL_ENDPOINT_SIZE) || defined(__DOXYGEN__))
102 /** Default size of the default control endpoint's bank, until altered by the Endpoint0Size value
103 * in the device descriptor. Not available if the FIXED_CONTROL_ENDPOINT_SIZE token is defined.
104 */
105 #define ENDPOINT_CONTROLEP_DEFAULT_SIZE 8
106 #endif
107
108 /** Endpoint number mask, for masking against endpoint addresses to retrieve the endpoint's
109 * numerical address in the device.
110 */
111 #define ENDPOINT_EPNUM_MASK 0x03
112
113 /** Endpoint bank size mask, for masking against endpoint addresses to retrieve the endpoint's
114 * bank size in the device.
115 */
116 #define ENDPOINT_EPSIZE_MASK 0x7FF
117
118 /** Maximum size in bytes of a given endpoint.
119 *
120 * \param n Endpoint number, a value between 0 and (ENDPOINT_TOTAL_ENDPOINTS - 1)
121 */
122 #define ENDPOINT_MAX_SIZE(n) _ENDPOINT_GET_MAXSIZE(n)
123
124 /** Indicates if the given endpoint supports double banking.
125 *
126 * \param n Endpoint number, a value between 0 and (ENDPOINT_TOTAL_ENDPOINTS - 1)
127 */
128 #define ENDPOINT_DOUBLEBANK_SUPPORTED(n) _ENDPOINT_GET_DOUBLEBANK(n)
129
130 #if !defined(CONTROL_ONLY_DEVICE)
131 #if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER) || defined(__DOXYGEN__)
132 /** Total number of endpoints (including the default control endpoint at address 0) which may
133 * be used in the device. Different USB AVR models support different amounts of endpoints,
134 * this value reflects the maximum number of endpoints for the currently selected AVR model.
135 */
136 #define ENDPOINT_TOTAL_ENDPOINTS 7
137 #else
138 #define ENDPOINT_TOTAL_ENDPOINTS 5
139 #endif
140 #else
141 #define ENDPOINT_TOTAL_ENDPOINTS 1
142 #endif
143
144 /** Interrupt definition for the endpoint SETUP interrupt (for CONTROL type endpoints). Should be
145 * used with the USB_INT_* macros located in USBInterrupt.h.
146 *
147 * This interrupt will fire if enabled on a CONTROL type endpoint if a new control packet is
148 * received from the host.
149 *
150 * \note This interrupt must be enabled and cleared on *each* endpoint which requires it (after the
151 * endpoint is selected), and will fire the common endpoint interrupt vector.
152 *
153 * \see \ref ENDPOINT_PIPE_vect for more information on the common pipe and endpoint interrupt vector.
154 */
155 #define ENDPOINT_INT_SETUP UEIENX, (1 << RXSTPE), UEINTX, (1 << RXSTPI)
156
157 /** Interrupt definition for the endpoint IN interrupt (for INTERRUPT type endpoints). Should be
158 * used with the USB_INT_* macros located in USBInterrupt.h.
159 *
160 * This interrupt will fire if enabled on an INTERRUPT type endpoint if a the endpoint interrupt
161 * period has elapsed and the endpoint is ready for a new packet to be written to its FIFO buffer
162 * (if required).
163 *
164 * \note This interrupt must be enabled and cleared on *each* endpoint which requires it (after the
165 * endpoint is selected), and will fire the common endpoint interrupt vector.
166 *
167 * \see \ref ENDPOINT_PIPE_vect for more information on the common pipe and endpoint interrupt vector.
168 */
169 #define ENDPOINT_INT_IN UEIENX, (1 << TXINE) , UEINTX, (1 << TXINI)
170
171 /** Interrupt definition for the endpoint OUT interrupt (for INTERRUPT type endpoints). Should be
172 * used with the USB_INT_* macros located in USBInterrupt.h.
173 *
174 * This interrupt will fire if enabled on an INTERRUPT type endpoint if a the endpoint interrupt
175 * period has elapsed and the endpoint is ready for a packet from the host to be read from its
176 * FIFO buffer (if received).
177 *
178 * \note This interrupt must be enabled and cleared on *each* endpoint which requires it (after the
179 * endpoint is selected), and will fire the common endpoint interrupt vector.
180 *
181 * \see \ref ENDPOINT_PIPE_vect for more information on the common pipe and endpoint interrupt vector.
182 */
183 #define ENDPOINT_INT_OUT UEIENX, (1 << RXOUTE), UEINTX, (1 << RXOUTI)
184
185 /* Pseudo-Function Macros: */
186 #if defined(__DOXYGEN__)
187 /** Indicates the number of bytes currently stored in the current endpoint's selected bank.
188 *
189 * \note The return width of this function may differ, depending on the maximum endpoint bank size
190 * of the selected AVR model.
191 *
192 * \ingroup Group_EndpointRW
193 *
194 * \return Total number of bytes in the currently selected Endpoint's FIFO buffer
195 */
196 static inline uint16_t Endpoint_BytesInEndpoint(void);
197
198 /** Get the endpoint address of the currently selected endpoint. This is typically used to save
199 * the currently selected endpoint number so that it can be restored after another endpoint has
200 * been manipulated.
201 *
202 * \return Index of the currently selected endpoint
203 */
204 static inline uint8_t Endpoint_GetCurrentEndpoint(void);
205
206 /** Selects the given endpoint number. If the address from the device descriptors is used, the
207 * value should be masked with the \ref ENDPOINT_EPNUM_MASK constant to extract only the endpoint
208 * number (and discarding the endpoint direction bit).
209 *
210 * Any endpoint operations which do not require the endpoint number to be indicated will operate on
211 * the currently selected endpoint.
212 *
213 * \param EndpointNumber Endpoint number to select
214 */
215 static inline void Endpoint_SelectEndpoint(uint8_t EndpointNumber);
216
217 /** Resets the endpoint bank FIFO. This clears all the endpoint banks and resets the USB controller's
218 * In and Out pointers to the bank's contents.
219 *
220 * \param EndpointNumber Endpoint number whose FIFO buffers are to be reset
221 */
222 static inline void Endpoint_ResetFIFO(uint8_t EndpointNumber);
223
224 /** Enables the currently selected endpoint so that data can be sent and received through it to
225 * and from a host.
226 *
227 * \note Endpoints must first be configured properly via \ref Endpoint_ConfigureEndpoint().
228 */
229 static inline void Endpoint_EnableEndpoint(void);
230
231 /** Disables the currently selected endpoint so that data cannot be sent and received through it
232 * to and from a host.
233 */
234 static inline void Endpoint_DisableEndpoint(void);
235
236 /** Determines if the currently selected endpoint is enabled, but not necessarily configured.
237 *
238 * \return Boolean True if the currently selected endpoint is enabled, false otherwise
239 */
240 static inline bool Endpoint_IsEnabled(void);
241
242 /** Determines if the currently selected endpoint may be read from (if data is waiting in the endpoint
243 * bank and the endpoint is an OUT direction, or if the bank is not yet full if the endpoint is an IN
244 * direction). This function will return false if an error has occurred in the endpoint, if the endpoint
245 * is an OUT direction and no packet (or an empty packet) has been received, or if the endpoint is an IN
246 * direction and the endpoint bank is full.
247 *
248 * \ingroup Group_EndpointPacketManagement
249 *
250 * \return Boolean true if the currently selected endpoint may be read from or written to, depending on its direction
251 */
252 static inline bool Endpoint_IsReadWriteAllowed(void);
253
254 /** Determines if the currently selected endpoint is configured.
255 *
256 * \return Boolean true if the currently selected endpoint has been configured, false otherwise
257 */
258 static inline bool Endpoint_IsConfigured(void);
259
260 /** Returns a mask indicating which INTERRUPT type endpoints have interrupted - i.e. their
261 * interrupt duration has elapsed. Which endpoints have interrupted can be determined by
262 * masking the return value against (1 << {Endpoint Number}).
263 *
264 * \return Mask whose bits indicate which endpoints have interrupted
265 */
266 static inline uint8_t Endpoint_GetEndpointInterrupts(void);
267
268 /** Clears the endpoint interrupt flag. This clears the specified endpoint number's interrupt
269 * mask in the endpoint interrupt flag register.
270 *
271 * \param EndpointNumber Index of the endpoint whose interrupt flag should be cleared
272 */
273 static inline void Endpoint_ClearEndpointInterrupt(uint8_t EndpointNumber);
274
275 /** Determines if the specified endpoint number has interrupted (valid only for INTERRUPT type
276 * endpoints).
277 *
278 * \param EndpointNumber Index of the endpoint whose interrupt flag should be tested
279 *
280 * \return Boolean true if the specified endpoint has interrupted, false otherwise
281 */
282 static inline bool Endpoint_HasEndpointInterrupted(uint8_t EndpointNumber);
283
284 /** Determines if the selected IN endpoint is ready for a new packet.
285 *
286 * \ingroup Group_EndpointPacketManagement
287 *
288 * \return Boolean true if the current endpoint is ready for an IN packet, false otherwise.
289 */
290 static inline bool Endpoint_IsINReady(void);
291
292 /** Determines if the selected OUT endpoint has received new packet.
293 *
294 * \ingroup Group_EndpointPacketManagement
295 *
296 * \return Boolean true if current endpoint is has received an OUT packet, false otherwise.
297 */
298 static inline bool Endpoint_IsOUTReceived(void);
299
300 /** Determines if the current CONTROL type endpoint has received a SETUP packet.
301 *
302 * \ingroup Group_EndpointPacketManagement
303 *
304 * \return Boolean true if the selected endpoint has received a SETUP packet, false otherwise.
305 */
306 static inline bool Endpoint_IsSETUPReceived(void);
307
308 /** Clears a received SETUP packet on the currently selected CONTROL type endpoint, freeing up the
309 * endpoint for the next packet.
310 *
311 * \ingroup Group_EndpointPacketManagement
312 *
313 * \note This is not applicable for non CONTROL type endpoints.
314 */
315 static inline void Endpoint_ClearSETUP(void);
316
317 /** Sends an IN packet to the host on the currently selected endpoint, freeing up the endpoint for the
318 * next packet and switching to the alternative endpoint bank if double banked.
319 *
320 * \ingroup Group_EndpointPacketManagement
321 */
322 static inline void Endpoint_ClearIN(void);
323
324 /** Acknowledges an OUT packet to the host on the currently selected endpoint, freeing up the endpoint
325 * for the next packet and switching to the alternative endpoint bank if double banked.
326 *
327 * \ingroup Group_EndpointPacketManagement
328 */
329 static inline void Endpoint_ClearOUT(void);
330
331 /** Stalls the current endpoint, indicating to the host that a logical problem occurred with the
332 * indicated endpoint and that the current transfer sequence should be aborted. This provides a
333 * way for devices to indicate invalid commands to the host so that the current transfer can be
334 * aborted and the host can begin its own recovery sequence.
335 *
336 * The currently selected endpoint remains stalled until either the \ref Endpoint_ClearStall() macro
337 * is called, or the host issues a CLEAR FEATURE request to the device for the currently selected
338 * endpoint.
339 *
340 * \ingroup Group_EndpointPacketManagement
341 */
342 static inline void Endpoint_StallTransaction(void);
343
344 /** Clears the STALL condition on the currently selected endpoint.
345 *
346 * \ingroup Group_EndpointPacketManagement
347 */
348 static inline void Endpoint_ClearStall(void);
349
350 /** Determines if the currently selected endpoint is stalled, false otherwise.
351 *
352 * \ingroup Group_EndpointPacketManagement
353 *
354 * \return Boolean true if the currently selected endpoint is stalled, false otherwise
355 */
356 static inline bool Endpoint_IsStalled(void);
357
358 /** Resets the data toggle of the currently selected endpoint. */
359 static inline void Endpoint_ResetDataToggle(void);
360
361 /** Determines the currently selected endpoint's direction.
362 *
363 * \return The currently selected endpoint's direction, as a ENDPOINT_DIR_* mask.
364 */
365 static inline uint8_t Endpoint_GetEndpointDirection(void);
366 #else
367 #if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER) || defined(__DOXYGEN__)
368 #define Endpoint_BytesInEndpoint() UEBCX
369 #else
370 #define Endpoint_BytesInEndpoint() UEBCLX
371 #endif
372
373 #if !defined(CONTROL_ONLY_DEVICE)
374 #define Endpoint_GetCurrentEndpoint() (UENUM & ENDPOINT_EPNUM_MASK)
375 #else
376 #define Endpoint_GetCurrentEndpoint() ENDPOINT_CONTROLEP
377 #endif
378
379 #if !defined(CONTROL_ONLY_DEVICE)
380 #define Endpoint_SelectEndpoint(epnum) MACROS{ UENUM = epnum; }MACROE
381 #else
382 #define Endpoint_SelectEndpoint(epnum) (void)epnum
383 #endif
384
385 #define Endpoint_ResetFIFO(epnum) MACROS{ UERST = (1 << epnum); UERST = 0; }MACROE
386
387 #define Endpoint_EnableEndpoint() MACROS{ UECONX |= (1 << EPEN); }MACROE
388
389 #define Endpoint_DisableEndpoint() MACROS{ UECONX &= ~(1 << EPEN); }MACROE
390
391 #define Endpoint_IsEnabled() ((UECONX & (1 << EPEN)) ? true : false)
392
393 #if !defined(CONTROL_ONLY_DEVICE)
394 #define Endpoint_IsReadWriteAllowed() ((UEINTX & (1 << RWAL)) ? true : false)
395 #endif
396
397 #define Endpoint_IsConfigured() ((UESTA0X & (1 << CFGOK)) ? true : false)
398
399 #define Endpoint_GetEndpointInterrupts() UEINT
400
401 #define Endpoint_ClearEndpointInterrupt(n) MACROS{ UEINT &= ~(1 << n); }MACROE
402
403 #define Endpoint_HasEndpointInterrupted(n) ((UEINT & (1 << n)) ? true : false)
404
405 #define Endpoint_IsINReady() ((UEINTX & (1 << TXINI)) ? true : false)
406
407 #define Endpoint_IsOUTReceived() ((UEINTX & (1 << RXOUTI)) ? true : false)
408
409 #define Endpoint_IsSETUPReceived() ((UEINTX & (1 << RXSTPI)) ? true : false)
410
411 #define Endpoint_ClearSETUP() MACROS{ UEINTX &= ~(1 << RXSTPI); }MACROE
412
413 #if !defined(CONTROL_ONLY_DEVICE)
414 #define Endpoint_ClearIN() MACROS{ uint8_t Temp = UEINTX; UEINTX = (Temp & ~(1 << TXINI)); \
415 UEINTX = (Temp & ~(1 << FIFOCON)); }MACROE
416 #else
417 #define Endpoint_ClearIN() MACROS{ UEINTX &= ~(1 << TXINI); }MACROE
418 #endif
419
420 #if !defined(CONTROL_ONLY_DEVICE)
421 #define Endpoint_ClearOUT() MACROS{ uint8_t Temp = UEINTX; UEINTX = (Temp & ~(1 << RXOUTI)); \
422 UEINTX = (Temp & ~(1 << FIFOCON)); }MACROE
423 #else
424 #define Endpoint_ClearOUT() MACROS{ UEINTX &= ~(1 << RXOUTI); }MACROE
425 #endif
426
427 #define Endpoint_StallTransaction() MACROS{ UECONX |= (1 << STALLRQ); }MACROE
428
429 #define Endpoint_ClearStall() MACROS{ UECONX |= (1 << STALLRQC); }MACROE
430
431 #define Endpoint_IsStalled() ((UECONX & (1 << STALLRQ)) ? true : false)
432
433 #define Endpoint_ResetDataToggle() MACROS{ UECONX |= (1 << RSTDT); }MACROE
434
435 #define Endpoint_GetEndpointDirection() (UECFG0X & ENDPOINT_DIR_IN)
436 #endif
437
438 /* Enums: */
439 /** Enum for the possible error return codes of the \ref Endpoint_WaitUntilReady() function.
440 *
441 * \ingroup Group_EndpointRW
442 */
443 enum Endpoint_WaitUntilReady_ErrorCodes_t
444 {
445 ENDPOINT_READYWAIT_NoError = 0, /**< Endpoint is ready for next packet, no error. */
446 ENDPOINT_READYWAIT_EndpointStalled = 1, /**< The endpoint was stalled during the stream
447 * transfer by the host or device.
448 */
449 ENDPOINT_READYWAIT_DeviceDisconnected = 2, /**< Device was disconnected from the host while
450 * waiting for the endpoint to become ready.
451 */
452 ENDPOINT_READYWAIT_Timeout = 3, /**< The host failed to accept or send the next packet
453 * within the software timeout period set by the
454 * \ref USB_STREAM_TIMEOUT_MS macro.
455 */
456 };
457
458 /** Enum for the possible error return codes of the Endpoint_*_Stream_* functions.
459 *
460 * \ingroup Group_EndpointRW
461 */
462 enum Endpoint_Stream_RW_ErrorCodes_t
463 {
464 ENDPOINT_RWSTREAM_ERROR_NoError = 0, /**< Command completed successfully, no error. */
465 ENDPOINT_RWSTREAM_ERROR_EndpointStalled = 1, /**< The endpoint was stalled during the stream
466 * transfer by the host or device.
467 */
468 ENDPOINT_RWSTREAM_ERROR_DeviceDisconnected = 1, /**< Device was disconnected from the host during
469 * the transfer.
470 */
471 ENDPOINT_RWSTREAM_ERROR_Timeout = 2, /**< The host failed to accept or send the next packet
472 * within the software timeout period set by the
473 * \ref USB_STREAM_TIMEOUT_MS macro.
474 */
475 ENDPOINT_RWSTREAM_ERROR_CallbackAborted = 3, /**< Indicates that the stream's callback function
476 * aborted the transfer early.
477 */
478 };
479
480 /** Enum for the possible error return codes of the Endpoint_*_Control_Stream_* functions..
481 *
482 * \ingroup Group_EndpointRW
483 */
484 enum Endpoint_ControlStream_RW_ErrorCodes_t
485 {
486 ENDPOINT_RWCSTREAM_ERROR_NoError = 0, /**< Command completed successfully, no error. */
487 ENDPOINT_RWCSTREAM_ERROR_HostAborted = 1, /**< The aborted the transfer prematurely. */
488 };
489
490 /* Inline Functions: */
491 /** Reads one byte from the currently selected endpoint's bank, for OUT direction endpoints.
492 *
493 * \ingroup Group_EndpointRW
494 *
495 * \return Next byte in the currently selected endpoint's FIFO buffer
496 */
497 static inline uint8_t Endpoint_Read_Byte(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
498 static inline uint8_t Endpoint_Read_Byte(void)
499 {
500 return UEDATX;
501 }
502
503 /** Writes one byte from the currently selected endpoint's bank, for IN direction endpoints.
504 *
505 * \ingroup Group_EndpointRW
506 *
507 * \param Byte Next byte to write into the the currently selected endpoint's FIFO buffer
508 */
509 static inline void Endpoint_Write_Byte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
510 static inline void Endpoint_Write_Byte(const uint8_t Byte)
511 {
512 UEDATX = Byte;
513 }
514
515 /** Discards one byte from the currently selected endpoint's bank, for OUT direction endpoints.
516 *
517 * \ingroup Group_EndpointRW
518 */
519 static inline void Endpoint_Discard_Byte(void) ATTR_ALWAYS_INLINE;
520 static inline void Endpoint_Discard_Byte(void)
521 {
522 uint8_t Dummy;
523
524 Dummy = UEDATX;
525 }
526
527 /** Reads two bytes from the currently selected endpoint's bank in little endian format, for OUT
528 * direction endpoints.
529 *
530 * \ingroup Group_EndpointRW
531 *
532 * \return Next word in the currently selected endpoint's FIFO buffer
533 */
534 static inline uint16_t Endpoint_Read_Word_LE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
535 static inline uint16_t Endpoint_Read_Word_LE(void)
536 {
537 uint16_t Data;
538
539 Data = UEDATX;
540 Data |= (((uint16_t)UEDATX) << 8);
541
542 return Data;
543 }
544
545 /** Reads two bytes from the currently selected endpoint's bank in big endian format, for OUT
546 * direction endpoints.
547 *
548 * \ingroup Group_EndpointRW
549 *
550 * \return Next word in the currently selected endpoint's FIFO buffer
551 */
552 static inline uint16_t Endpoint_Read_Word_BE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
553 static inline uint16_t Endpoint_Read_Word_BE(void)
554 {
555 uint16_t Data;
556
557 Data = (((uint16_t)UEDATX) << 8);
558 Data |= UEDATX;
559
560 return Data;
561 }
562
563 /** Writes two bytes to the currently selected endpoint's bank in little endian format, for IN
564 * direction endpoints.
565 *
566 * \ingroup Group_EndpointRW
567 *
568 * \param Word Next word to write to the currently selected endpoint's FIFO buffer
569 */
570 static inline void Endpoint_Write_Word_LE(const uint16_t Word) ATTR_ALWAYS_INLINE;
571 static inline void Endpoint_Write_Word_LE(const uint16_t Word)
572 {
573 UEDATX = (Word & 0xFF);
574 UEDATX = (Word >> 8);
575 }
576
577 /** Writes two bytes to the currently selected endpoint's bank in big endian format, for IN
578 * direction endpoints.
579 *
580 * \ingroup Group_EndpointRW
581 *
582 * \param Word Next word to write to the currently selected endpoint's FIFO buffer
583 */
584 static inline void Endpoint_Write_Word_BE(const uint16_t Word) ATTR_ALWAYS_INLINE;
585 static inline void Endpoint_Write_Word_BE(const uint16_t Word)
586 {
587 UEDATX = (Word >> 8);
588 UEDATX = (Word & 0xFF);
589 }
590
591 /** Discards two bytes from the currently selected endpoint's bank, for OUT direction endpoints.
592 *
593 * \ingroup Group_EndpointRW
594 */
595 static inline void Endpoint_Discard_Word(void) ATTR_ALWAYS_INLINE;
596 static inline void Endpoint_Discard_Word(void)
597 {
598 uint8_t Dummy;
599
600 Dummy = UEDATX;
601 Dummy = UEDATX;
602 }
603
604 /** Reads four bytes from the currently selected endpoint's bank in little endian format, for OUT
605 * direction endpoints.
606 *
607 * \ingroup Group_EndpointRW
608 *
609 * \return Next double word in the currently selected endpoint's FIFO buffer
610 */
611 static inline uint32_t Endpoint_Read_DWord_LE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
612 static inline uint32_t Endpoint_Read_DWord_LE(void)
613 {
614 union
615 {
616 uint32_t DWord;
617 uint8_t Bytes[4];
618 } Data;
619
620 Data.Bytes[0] = UEDATX;
621 Data.Bytes[1] = UEDATX;
622 Data.Bytes[2] = UEDATX;
623 Data.Bytes[3] = UEDATX;
624
625 return Data.DWord;
626 }
627
628 /** Reads four bytes from the currently selected endpoint's bank in big endian format, for OUT
629 * direction endpoints.
630 *
631 * \ingroup Group_EndpointRW
632 *
633 * \return Next double word in the currently selected endpoint's FIFO buffer
634 */
635 static inline uint32_t Endpoint_Read_DWord_BE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
636 static inline uint32_t Endpoint_Read_DWord_BE(void)
637 {
638 union
639 {
640 uint32_t DWord;
641 uint8_t Bytes[4];
642 } Data;
643
644 Data.Bytes[3] = UEDATX;
645 Data.Bytes[2] = UEDATX;
646 Data.Bytes[1] = UEDATX;
647 Data.Bytes[0] = UEDATX;
648
649 return Data.DWord;
650 }
651
652 /** Writes four bytes to the currently selected endpoint's bank in little endian format, for IN
653 * direction endpoints.
654 *
655 * \ingroup Group_EndpointRW
656 *
657 * \param DWord Next double word to write to the currently selected endpoint's FIFO buffer
658 */
659 static inline void Endpoint_Write_DWord_LE(const uint32_t DWord) ATTR_ALWAYS_INLINE;
660 static inline void Endpoint_Write_DWord_LE(const uint32_t DWord)
661 {
662 UEDATX = (DWord & 0xFF);
663 UEDATX = (DWord >> 8);
664 UEDATX = (DWord >> 16);
665 UEDATX = (DWord >> 24);
666 }
667
668 /** Writes four bytes to the currently selected endpoint's bank in big endian format, for IN
669 * direction endpoints.
670 *
671 * \ingroup Group_EndpointRW
672 *
673 * \param DWord Next double word to write to the currently selected endpoint's FIFO buffer
674 */
675 static inline void Endpoint_Write_DWord_BE(const uint32_t DWord) ATTR_ALWAYS_INLINE;
676 static inline void Endpoint_Write_DWord_BE(const uint32_t DWord)
677 {
678 UEDATX = (DWord >> 24);
679 UEDATX = (DWord >> 16);
680 UEDATX = (DWord >> 8);
681 UEDATX = (DWord & 0xFF);
682 }
683
684 /** Discards four bytes from the currently selected endpoint's bank, for OUT direction endpoints.
685 *
686 * \ingroup Group_EndpointRW
687 */
688 static inline void Endpoint_Discard_DWord(void) ATTR_ALWAYS_INLINE;
689 static inline void Endpoint_Discard_DWord(void)
690 {
691 uint8_t Dummy;
692
693 Dummy = UEDATX;
694 Dummy = UEDATX;
695 Dummy = UEDATX;
696 Dummy = UEDATX;
697 }
698
699 /* External Variables: */
700 /** Global indicating the maximum packet size of the default control endpoint located at address
701 * 0 in the device. This value is set to the value indicated in the device descriptor in the user
702 * project once the USB interface is initialized into device mode.
703 *
704 * If space is an issue, it is possible to fix this to a static value by defining the control
705 * endpoint size in the FIXED_CONTROL_ENDPOINT_SIZE token passed to the compiler in the makefile
706 * via the -D switch. When a fixed control endpoint size is used, the size is no longer dynamically
707 * read from the descriptors at runtime and instead fixed to the given value. When used, it is
708 * important that the descriptor control endpoint size value matches the size given as the
709 * FIXED_CONTROL_ENDPOINT_SIZE token - it is recommended that the FIXED_CONTROL_ENDPOINT_SIZE token
710 * be used in the descriptors to ensure this.
711 *
712 * \note This variable should be treated as read-only in the user application, and never manually
713 * changed in value.
714 */
715 #if (!defined(FIXED_CONTROL_ENDPOINT_SIZE) || defined(__DOXYGEN__))
716 extern uint8_t USB_ControlEndpointSize;
717 #else
718 #define USB_ControlEndpointSize FIXED_CONTROL_ENDPOINT_SIZE
719 #endif
720
721 /* Function Prototypes: */
722 /** Configures the specified endpoint number with the given endpoint type, direction, bank size
723 * and banking mode. Endpoints should be allocated in ascending order by their address in the
724 * device (i.e. endpoint 1 should be configured before endpoint 2 and so on).
725 *
726 * The endpoint type may be one of the EP_TYPE_* macros listed in LowLevel.h and the direction
727 * may be either \ref ENDPOINT_DIR_OUT or \ref ENDPOINT_DIR_IN.
728 *
729 * The bank size must indicate the maximum packet size that the endpoint can handle. Different
730 * endpoint numbers can handle different maximum packet sizes - refer to the chosen USB AVR's
731 * datasheet to determine the maximum bank size for each endpoint.
732 *
733 * The banking mode may be either \ref ENDPOINT_BANK_SINGLE or \ref ENDPOINT_BANK_DOUBLE.
734 *
735 * The success of this routine can be determined via the \ref Endpoint_IsConfigured() macro.
736 *
737 * \note This routine will select the specified endpoint, and the endpoint will remain selected
738 * once the routine completes regardless of if the endpoint configuration succeeds.
739 *
740 * \return Boolean true if the configuration succeeded, false otherwise
741 */
742 bool Endpoint_ConfigureEndpoint(const uint8_t Number, const uint8_t Type, const uint8_t Direction,
743 const uint16_t Size, const uint8_t Banks);
744
745 #if !defined(CONTROL_ONLY_DEVICE)
746
747 /** Spinloops until the currently selected non-control endpoint is ready for the next packet of data
748 * to be read or written to it.
749 *
750 * \note This routine should not be called on CONTROL type endpoints.
751 *
752 * \ingroup Group_EndpointRW
753 *
754 * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum.
755 */
756 uint8_t Endpoint_WaitUntilReady(void);
757
758 /** Reads and discards the given number of bytes from the endpoint from the given buffer,
759 * discarding fully read packets from the host as needed. The last packet is not automatically
760 * discarded once the remaining bytes has been read; the user is responsible for manually
761 * discarding the last packet from the host via the \ref Endpoint_ClearOUT() macro. Between
762 * each USB packet, the given stream callback function is executed repeatedly until the next
763 * packet is ready, allowing for early aborts of stream transfers.
764 *
765 * The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
766 * NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
767 * and this function has the Callback parameter omitted.
768 *
769 * \note This routine should not be used on CONTROL type endpoints.
770 *
771 * \ingroup Group_EndpointRW
772 *
773 * \param Length Number of bytes to send via the currently selected endpoint.
774 * \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
775 *
776 * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
777 */
778 uint8_t Endpoint_Discard_Stream(uint16_t Length
779 #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
780 , uint8_t (* const Callback)(void)
781 #endif
782 );
783
784 /** Writes the given number of bytes to the endpoint from the given buffer in little endian,
785 * sending full packets to the host as needed. The last packet filled is not automatically sent;
786 * the user is responsible for manually sending the last written packet to the host via the
787 * \ref Endpoint_ClearIN() macro. Between each USB packet, the given stream callback function
788 * is executed repeatedly until the endpoint is ready to accept the next packet, allowing for early
789 * aborts of stream transfers.
790 *
791 * The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
792 * NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
793 * and this function has the Callback parameter omitted.
794 *
795 * \note This routine should not be used on CONTROL type endpoints.
796 *
797 * \ingroup Group_EndpointRW
798 *
799 * \param Buffer Pointer to the source data buffer to read from.
800 * \param Length Number of bytes to read for the currently selected endpoint into the buffer.
801 * \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
802 *
803 * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
804 */
805 uint8_t Endpoint_Write_Stream_LE(const void* Buffer, uint16_t Length
806 #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
807 , uint8_t (* const Callback)(void)
808 #endif
809 ) ATTR_NON_NULL_PTR_ARG(1);
810
811 /** Writes the given number of bytes to the endpoint from the given buffer in big endian,
812 * sending full packets to the host as needed. The last packet filled is not automatically sent;
813 * the user is responsible for manually sending the last written packet to the host via the
814 * \ref Endpoint_ClearIN() macro. Between each USB packet, the given stream callback function
815 * is executed repeatedly until the endpoint is ready to accept the next packet, allowing for early
816 * aborts of stream transfers.
817 *
818 * The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
819 * NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
820 * and this function has the Callback parameter omitted.
821 *
822 * \note This routine should not be used on CONTROL type endpoints.
823 *
824 * \ingroup Group_EndpointRW
825 *
826 * \param Buffer Pointer to the source data buffer to read from.
827 * \param Length Number of bytes to read for the currently selected endpoint into the buffer.
828 * \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
829 *
830 * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
831 */
832 uint8_t Endpoint_Write_Stream_BE(const void* Buffer, uint16_t Length
833 #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
834 , uint8_t (* const Callback)(void)
835 #endif
836 ) ATTR_NON_NULL_PTR_ARG(1);
837
838 /** Reads the given number of bytes from the endpoint from the given buffer in little endian,
839 * discarding fully read packets from the host as needed. The last packet is not automatically
840 * discarded once the remaining bytes has been read; the user is responsible for manually
841 * discarding the last packet from the host via the \ref Endpoint_ClearOUT() macro. Between
842 * each USB packet, the given stream callback function is executed repeatedly until the endpoint
843 * is ready to accept the next packet, allowing for early aborts of stream transfers.
844 *
845 * The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
846 * NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
847 * and this function has the Callback parameter omitted.
848 *
849 * \note This routine should not be used on CONTROL type endpoints.
850 *
851 * \ingroup Group_EndpointRW
852 *
853 * \param Buffer Pointer to the destination data buffer to write to.
854 * \param Length Number of bytes to send via the currently selected endpoint.
855 * \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
856 *
857 * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
858 */
859 uint8_t Endpoint_Read_Stream_LE(void* Buffer, uint16_t Length
860 #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
861 , uint8_t (* const Callback)(void)
862 #endif
863 ) ATTR_NON_NULL_PTR_ARG(1);
864
865 /** Reads the given number of bytes from the endpoint from the given buffer in big endian,
866 * discarding fully read packets from the host as needed. The last packet is not automatically
867 * discarded once the remaining bytes has been read; the user is responsible for manually
868 * discarding the last packet from the host via the \ref Endpoint_ClearOUT() macro. Between
869 * each USB packet, the given stream callback function is executed repeatedly until the endpoint
870 * is ready to accept the next packet, allowing for early aborts of stream transfers.
871 *
872 * The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
873 * NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
874 * and this function has the Callback parameter omitted.
875 *
876 * \note This routine should not be used on CONTROL type endpoints.
877 *
878 * \ingroup Group_EndpointRW
879 *
880 * \param Buffer Pointer to the destination data buffer to write to.
881 * \param Length Number of bytes to send via the currently selected endpoint.
882 * \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
883 *
884 * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
885 */
886 uint8_t Endpoint_Read_Stream_BE(void* Buffer, uint16_t Length
887 #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
888 , uint8_t (* const Callback)(void)
889 #endif
890 ) ATTR_NON_NULL_PTR_ARG(1);
891
892 #endif
893
894 /** Writes the given number of bytes to the CONTROL type endpoint from the given buffer in little endian,
895 * sending full packets to the host as needed. The host OUT acknowledgement is not automatically cleared
896 * in both failure and success states; the user is responsible for manually clearing the setup OUT to
897 * finalize the transfer via the \ref Endpoint_ClearOUT() macro.
898 *
899 * \note This routine should only be used on CONTROL type endpoints.
900 *
901 * \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
902 * together; i.e. the entire stream data must be read or written at the one time.
903 *
904 * \ingroup Group_EndpointRW
905 *
906 * \param Buffer Pointer to the source data buffer to read from.
907 * \param Length Number of bytes to read for the currently selected endpoint into the buffer.
908 *
909 * \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
910 */
911 uint8_t Endpoint_Write_Control_Stream_LE(const void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
912
913 /** Writes the given number of bytes to the CONTROL type endpoint from the given buffer in big endian,
914 * sending full packets to the host as needed. The host OUT acknowledgement is not automatically cleared
915 * in both failure and success states; the user is responsible for manually clearing the setup OUT to
916 * finalize the transfer via the \ref Endpoint_ClearOUT() macro.
917 *
918 * \note This routine should only be used on CONTROL type endpoints.
919 *
920 * \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
921 * together; i.e. the entire stream data must be read or written at the one time.
922 *
923 * \ingroup Group_EndpointRW
924 *
925 * \param Buffer Pointer to the source data buffer to read from.
926 * \param Length Number of bytes to read for the currently selected endpoint into the buffer.
927 *
928 * \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
929 */
930 uint8_t Endpoint_Write_Control_Stream_BE(const void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
931
932 /** Reads the given number of bytes from the CONTROL endpoint from the given buffer in little endian,
933 * discarding fully read packets from the host as needed. The device IN acknowledgement is not
934 * automatically sent after success or failure states; the user is responsible for manually sending the
935 * setup IN to finalize the transfer via the \ref Endpoint_ClearIN() macro.
936 *
937 * \note This routine should only be used on CONTROL type endpoints.
938 *
939 * \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
940 * together; i.e. the entire stream data must be read or written at the one time.
941 *
942 * \ingroup Group_EndpointRW
943 *
944 * \param Buffer Pointer to the destination data buffer to write to.
945 * \param Length Number of bytes to send via the currently selected endpoint.
946 *
947 * \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
948 */
949 uint8_t Endpoint_Read_Control_Stream_LE(void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
950
951 /** Reads the given number of bytes from the CONTROL endpoint from the given buffer in big endian,
952 * discarding fully read packets from the host as needed. The device IN acknowledgement is not
953 * automatically sent after success or failure states; the user is responsible for manually sending the
954 * setup IN to finalize the transfer via the \ref Endpoint_ClearIN() macro.
955 *
956 * \note This routine should only be used on CONTROL type endpoints.
957 *
958 * \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
959 * together; i.e. the entire stream data must be read or written at the one time.
960 *
961 * \ingroup Group_EndpointRW
962 *
963 * \param Buffer Pointer to the destination data buffer to write to.
964 * \param Length Number of bytes to send via the currently selected endpoint.
965 *
966 * \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
967 */
968 uint8_t Endpoint_Read_Control_Stream_BE(void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
969
970 /* Private Interface - For use in library only: */
971 #if !defined(__DOXYGEN__)
972 /* Macros: */
973 #define Endpoint_AllocateMemory() MACROS{ UECFG1X |= (1 << ALLOC); }MACROE
974 #define Endpoint_DeallocateMemory() MACROS{ UECFG1X &= ~(1 << ALLOC); }MACROE
975
976 #define _ENDPOINT_GET_MAXSIZE(n) _ENDPOINT_GET_MAXSIZE2(ENDPOINT_DETAILS_EP ## n)
977 #define _ENDPOINT_GET_MAXSIZE2(details) _ENDPOINT_GET_MAXSIZE3(details)
978 #define _ENDPOINT_GET_MAXSIZE3(maxsize, db) maxsize
979
980 #define _ENDPOINT_GET_DOUBLEBANK(n) _ENDPOINT_GET_DOUBLEBANK2(ENDPOINT_DETAILS_EP ## n)
981 #define _ENDPOINT_GET_DOUBLEBANK2(details) _ENDPOINT_GET_DOUBLEBANK3(details)
982 #define _ENDPOINT_GET_DOUBLEBANK3(maxsize, db) db
983
984 #if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)
985 #define ENDPOINT_DETAILS_EP0 64, true
986 #define ENDPOINT_DETAILS_EP1 256, true
987 #define ENDPOINT_DETAILS_EP2 64, true
988 #define ENDPOINT_DETAILS_EP3 64, true
989 #define ENDPOINT_DETAILS_EP4 64, true
990 #define ENDPOINT_DETAILS_EP5 64, true
991 #define ENDPOINT_DETAILS_EP6 64, true
992 #else
993 #define ENDPOINT_DETAILS_EP0 64, true
994 #define ENDPOINT_DETAILS_EP1 64, false
995 #define ENDPOINT_DETAILS_EP2 64, false
996 #define ENDPOINT_DETAILS_EP3 64, true
997 #define ENDPOINT_DETAILS_EP4 64, true
998 #endif
999
1000 #define Endpoint_ConfigureEndpoint(Number, Type, Direction, Size, Banks) \
1001 Endpoint_ConfigureEndpoint_Prv(Number, \
1002 ((Type << EPTYPE0) | Direction), \
1003 ((1 << ALLOC) | Banks | \
1004 (__builtin_constant_p(Size) ? \
1005 Endpoint_BytesToEPSizeMask(Size) : \
1006 Endpoint_BytesToEPSizeMaskDynamic(Size))))
1007
1008 /* Function Prototypes: */
1009 void Endpoint_ClearEndpoints(void);
1010 uint8_t Endpoint_BytesToEPSizeMaskDynamic(const uint16_t Size);
1011 bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number, const uint8_t UECFG0XData, const uint8_t UECFG1XData);
1012
1013 /* Inline Functions: */
1014 static inline uint8_t Endpoint_BytesToEPSizeMask(const uint16_t Bytes) ATTR_WARN_UNUSED_RESULT ATTR_CONST ATTR_ALWAYS_INLINE;
1015 static inline uint8_t Endpoint_BytesToEPSizeMask(const uint16_t Bytes)
1016 {
1017 uint8_t MaskVal = 0;
1018 uint16_t CheckBytes = 8;
1019
1020 while (CheckBytes < Bytes)
1021 {
1022 MaskVal++;
1023 CheckBytes <<= 1;
1024 }
1025
1026 return (MaskVal << EPSIZE0);
1027 };
1028
1029 #endif
1030
1031 /* Disable C linkage for C++ Compilers: */
1032 #if defined(__cplusplus)
1033 }
1034 #endif
1035
1036 #endif
1037
1038 /** @} */
USB isp AVR programmer