aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/machine/machine_atsamd51_usb.go
blob: b3f570ac781f54e6ac584719fda0ba3e93a94dcb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
//go:build (sam && atsamd51) || (sam && atsame5x)

package machine

import (
	"device/sam"
	"machine/usb"
	"runtime/interrupt"
	"unsafe"
)

const (
	// these are SAMD51 specific.
	usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos  = 0
	usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask = 0x3FFF

	usb_DEVICE_PCKSIZE_SIZE_Pos  = 28
	usb_DEVICE_PCKSIZE_SIZE_Mask = 0x7

	usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos  = 14
	usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Mask = 0x3FFF
)

// Configure the USB peripheral. The config is here for compatibility with the UART interface.
func (dev *USBDevice) Configure(config UARTConfig) {
	if dev.initcomplete {
		return
	}

	// reset USB interface
	sam.USB_DEVICE.CTRLA.SetBits(sam.USB_DEVICE_CTRLA_SWRST)
	for sam.USB_DEVICE.SYNCBUSY.HasBits(sam.USB_DEVICE_SYNCBUSY_SWRST) ||
		sam.USB_DEVICE.SYNCBUSY.HasBits(sam.USB_DEVICE_SYNCBUSY_ENABLE) {
	}

	sam.USB_DEVICE.DESCADD.Set(uint32(uintptr(unsafe.Pointer(&usbEndpointDescriptors))))

	// configure pins
	USBCDC_DM_PIN.Configure(PinConfig{Mode: PinCom})
	USBCDC_DP_PIN.Configure(PinConfig{Mode: PinCom})

	// performs pad calibration from store fuses
	handlePadCalibration()

	// run in standby
	sam.USB_DEVICE.CTRLA.SetBits(sam.USB_DEVICE_CTRLA_RUNSTDBY)

	// set full speed
	sam.USB_DEVICE.CTRLB.SetBits(sam.USB_DEVICE_CTRLB_SPDCONF_FS << sam.USB_DEVICE_CTRLB_SPDCONF_Pos)

	// attach
	sam.USB_DEVICE.CTRLB.ClearBits(sam.USB_DEVICE_CTRLB_DETACH)

	// enable interrupt for end of reset
	sam.USB_DEVICE.INTENSET.SetBits(sam.USB_DEVICE_INTENSET_EORST)

	// enable interrupt for start of frame
	sam.USB_DEVICE.INTENSET.SetBits(sam.USB_DEVICE_INTENSET_SOF)

	// enable USB
	sam.USB_DEVICE.CTRLA.SetBits(sam.USB_DEVICE_CTRLA_ENABLE)

	// enable IRQ
	interrupt.New(sam.IRQ_USB_OTHER, handleUSBIRQ).Enable()
	interrupt.New(sam.IRQ_USB_SOF_HSOF, handleUSBIRQ).Enable()
	interrupt.New(sam.IRQ_USB_TRCPT0, handleUSBIRQ).Enable()
	interrupt.New(sam.IRQ_USB_TRCPT1, handleUSBIRQ).Enable()

	dev.initcomplete = true
}

func handlePadCalibration() {
	// Load Pad Calibration data from non-volatile memory
	// This requires registers that are not included in the SVD file.
	// Modeled after defines from samd21g18a.h and nvmctrl.h:
	//
	// #define NVMCTRL_OTP4 0x00806020
	//
	// #define USB_FUSES_TRANSN_ADDR       (NVMCTRL_OTP4 + 4)
	// #define USB_FUSES_TRANSN_Pos        13           /**< \brief (NVMCTRL_OTP4) USB pad Transn calibration */
	// #define USB_FUSES_TRANSN_Msk        (0x1Fu << USB_FUSES_TRANSN_Pos)
	// #define USB_FUSES_TRANSN(value)     ((USB_FUSES_TRANSN_Msk & ((value) << USB_FUSES_TRANSN_Pos)))

	// #define USB_FUSES_TRANSP_ADDR       (NVMCTRL_OTP4 + 4)
	// #define USB_FUSES_TRANSP_Pos        18           /**< \brief (NVMCTRL_OTP4) USB pad Transp calibration */
	// #define USB_FUSES_TRANSP_Msk        (0x1Fu << USB_FUSES_TRANSP_Pos)
	// #define USB_FUSES_TRANSP(value)     ((USB_FUSES_TRANSP_Msk & ((value) << USB_FUSES_TRANSP_Pos)))

	// #define USB_FUSES_TRIM_ADDR         (NVMCTRL_OTP4 + 4)
	// #define USB_FUSES_TRIM_Pos          23           /**< \brief (NVMCTRL_OTP4) USB pad Trim calibration */
	// #define USB_FUSES_TRIM_Msk          (0x7u << USB_FUSES_TRIM_Pos)
	// #define USB_FUSES_TRIM(value)       ((USB_FUSES_TRIM_Msk & ((value) << USB_FUSES_TRIM_Pos)))
	//
	fuse := *(*uint32)(unsafe.Pointer(uintptr(0x00806020) + 4))
	calibTransN := uint16(fuse>>13) & uint16(0x1f)
	calibTransP := uint16(fuse>>18) & uint16(0x1f)
	calibTrim := uint16(fuse>>23) & uint16(0x7)

	if calibTransN == 0x1f {
		calibTransN = 5
	}
	sam.USB_DEVICE.PADCAL.SetBits(calibTransN << sam.USB_DEVICE_PADCAL_TRANSN_Pos)

	if calibTransP == 0x1f {
		calibTransP = 29
	}
	sam.USB_DEVICE.PADCAL.SetBits(calibTransP << sam.USB_DEVICE_PADCAL_TRANSP_Pos)

	if calibTrim == 0x7 {
		calibTrim = 3
	}
	sam.USB_DEVICE.PADCAL.SetBits(calibTrim << sam.USB_DEVICE_PADCAL_TRIM_Pos)
}

func handleUSBIRQ(intr interrupt.Interrupt) {
	// reset all interrupt flags
	flags := sam.USB_DEVICE.INTFLAG.Get()
	sam.USB_DEVICE.INTFLAG.Set(flags)

	// End of reset
	if (flags & sam.USB_DEVICE_INTFLAG_EORST) > 0 {
		// Configure control endpoint
		initEndpoint(0, usb.ENDPOINT_TYPE_CONTROL)

		usbConfiguration = 0

		// ack the End-Of-Reset interrupt
		sam.USB_DEVICE.INTFLAG.Set(sam.USB_DEVICE_INTFLAG_EORST)
	}

	// Start of frame
	if (flags & sam.USB_DEVICE_INTFLAG_SOF) > 0 {
		// if you want to blink LED showing traffic, this would be the place...
	}

	// Endpoint 0 Setup interrupt
	if getEPINTFLAG(0)&sam.USB_DEVICE_ENDPOINT_EPINTFLAG_RXSTP > 0 {
		// ack setup received
		setEPINTFLAG(0, sam.USB_DEVICE_ENDPOINT_EPINTFLAG_RXSTP)

		// parse setup
		setup := usb.NewSetup(udd_ep_out_cache_buffer[0][:])

		// Clear the Bank 0 ready flag on Control OUT
		setEPSTATUSCLR(0, sam.USB_DEVICE_ENDPOINT_EPSTATUSCLR_BK0RDY)
		usbEndpointDescriptors[0].DeviceDescBank[0].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)

		ok := false
		if (setup.BmRequestType & usb.REQUEST_TYPE) == usb.REQUEST_STANDARD {
			// Standard Requests
			ok = handleStandardSetup(setup)
		} else {
			// Class Interface Requests
			if setup.WIndex < uint16(len(usbSetupHandler)) && usbSetupHandler[setup.WIndex] != nil {
				ok = usbSetupHandler[setup.WIndex](setup)
			}
		}

		if ok {
			// set Bank1 ready
			setEPSTATUSSET(0, sam.USB_DEVICE_ENDPOINT_EPSTATUSSET_BK1RDY)
		} else {
			// Stall endpoint
			setEPSTATUSSET(0, sam.USB_DEVICE_ENDPOINT_EPINTFLAG_STALL1)
		}

		if getEPINTFLAG(0)&sam.USB_DEVICE_ENDPOINT_EPINTFLAG_STALL1 > 0 {
			// ack the stall
			setEPINTFLAG(0, sam.USB_DEVICE_ENDPOINT_EPINTFLAG_STALL1)

			// clear stall request
			setEPINTENCLR(0, sam.USB_DEVICE_ENDPOINT_EPINTENCLR_STALL1)
		}
	}

	// Now the actual transfer handlers, ignore endpoint number 0 (setup)
	var i uint32
	for i = 1; i < uint32(len(endPoints)); i++ {
		// Check if endpoint has a pending interrupt
		epFlags := getEPINTFLAG(i)
		setEPINTFLAG(i, epFlags)
		if (epFlags & sam.USB_DEVICE_ENDPOINT_EPINTFLAG_TRCPT0) > 0 {
			buf := handleEndpointRx(i)
			if usbRxHandler[i] != nil {
				usbRxHandler[i](buf)
			}
			handleEndpointRxComplete(i)
		} else if (epFlags & sam.USB_DEVICE_ENDPOINT_EPINTFLAG_TRCPT1) > 0 {
			if usbTxHandler[i] != nil {
				usbTxHandler[i]()
			}
		}
	}
}

func initEndpoint(ep, config uint32) {
	switch config {
	case usb.ENDPOINT_TYPE_INTERRUPT | usb.EndpointIn:
		// set packet size
		usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE.SetBits(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)

		// set data buffer address
		usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep]))))

		// set endpoint type
		setEPCFG(ep, ((usb.ENDPOINT_TYPE_INTERRUPT + 1) << sam.USB_DEVICE_ENDPOINT_EPCFG_EPTYPE1_Pos))

		setEPINTENSET(ep, sam.USB_DEVICE_ENDPOINT_EPINTENSET_TRCPT1)

	case usb.ENDPOINT_TYPE_BULK | usb.EndpointOut:
		// set packet size
		usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.SetBits(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)

		// set data buffer address
		usbEndpointDescriptors[ep].DeviceDescBank[0].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_out_cache_buffer[ep]))))

		// set endpoint type
		setEPCFG(ep, ((usb.ENDPOINT_TYPE_BULK + 1) << sam.USB_DEVICE_ENDPOINT_EPCFG_EPTYPE0_Pos))

		// receive interrupts when current transfer complete
		setEPINTENSET(ep, sam.USB_DEVICE_ENDPOINT_EPINTENSET_TRCPT0)

		// set byte count to zero, we have not received anything yet
		usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)

		// ready for next transfer
		setEPSTATUSCLR(ep, sam.USB_DEVICE_ENDPOINT_EPSTATUSCLR_BK0RDY)

	case usb.ENDPOINT_TYPE_INTERRUPT | usb.EndpointOut:
		// TODO: not really anything, seems like...

	case usb.ENDPOINT_TYPE_BULK | usb.EndpointIn:
		// set packet size
		usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE.SetBits(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)

		// set data buffer address
		usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep]))))

		// set endpoint type
		setEPCFG(ep, ((usb.ENDPOINT_TYPE_BULK + 1) << sam.USB_DEVICE_ENDPOINT_EPCFG_EPTYPE1_Pos))

		// NAK on endpoint IN, the bank is not yet filled in.
		setEPSTATUSCLR(ep, sam.USB_DEVICE_ENDPOINT_EPSTATUSCLR_BK1RDY)

		setEPINTENSET(ep, sam.USB_DEVICE_ENDPOINT_EPINTENSET_TRCPT1)

	case usb.ENDPOINT_TYPE_CONTROL:
		// Control OUT
		// set packet size
		usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.SetBits(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)

		// set data buffer address
		usbEndpointDescriptors[ep].DeviceDescBank[0].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_out_cache_buffer[ep]))))

		// set endpoint type
		setEPCFG(ep, getEPCFG(ep)|((usb.ENDPOINT_TYPE_CONTROL+1)<<sam.USB_DEVICE_ENDPOINT_EPCFG_EPTYPE0_Pos))

		// Control IN
		// set packet size
		usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE.SetBits(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)

		// set data buffer address
		usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep]))))

		// set endpoint type
		setEPCFG(ep, getEPCFG(ep)|((usb.ENDPOINT_TYPE_CONTROL+1)<<sam.USB_DEVICE_ENDPOINT_EPCFG_EPTYPE1_Pos))

		// Prepare OUT endpoint for receive
		// set multi packet size for expected number of receive bytes on control OUT
		usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.SetBits(64 << usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos)

		// set byte count to zero, we have not received anything yet
		usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)

		// NAK on endpoint OUT to show we are ready to receive control data
		setEPSTATUSSET(ep, sam.USB_DEVICE_ENDPOINT_EPSTATUSSET_BK0RDY)

		// Enable Setup-Received interrupt
		setEPINTENSET(0, sam.USB_DEVICE_ENDPOINT_EPINTENSET_RXSTP)
	}
}

func handleUSBSetAddress(setup usb.Setup) bool {
	// set packet size 64 with auto Zlp after transfer
	usbEndpointDescriptors[0].DeviceDescBank[1].PCKSIZE.Set((epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos) |
		uint32(1<<31)) // autozlp

	// ack the transfer is complete from the request
	setEPINTFLAG(0, sam.USB_DEVICE_ENDPOINT_EPINTFLAG_TRCPT1)

	// set bank ready for data
	setEPSTATUSSET(0, sam.USB_DEVICE_ENDPOINT_EPSTATUSSET_BK1RDY)

	// wait for transfer to complete
	timeout := 3000
	for (getEPINTFLAG(0) & sam.USB_DEVICE_ENDPOINT_EPINTFLAG_TRCPT1) == 0 {
		timeout--
		if timeout == 0 {
			return true
		}
	}

	// last, set the device address to that requested by host
	sam.USB_DEVICE.DADD.SetBits(setup.WValueL)
	sam.USB_DEVICE.DADD.SetBits(sam.USB_DEVICE_DADD_ADDEN)

	return true
}

// SendUSBInPacket sends a packet for USB (interrupt in / bulk in).
func SendUSBInPacket(ep uint32, data []byte) bool {
	sendUSBPacket(ep, data, 0)

	// clear transfer complete flag
	setEPINTFLAG(ep, sam.USB_DEVICE_ENDPOINT_EPINTFLAG_TRCPT1)

	// send data by setting bank ready
	setEPSTATUSSET(ep, sam.USB_DEVICE_ENDPOINT_EPSTATUSSET_BK1RDY)

	return true
}

//go:noinline
func sendUSBPacket(ep uint32, data []byte, maxsize uint16) {
	l := uint16(len(data))
	if 0 < maxsize && maxsize < l {
		l = maxsize
	}

	// Set endpoint address for sending data
	if ep == 0 {
		copy(udd_ep_control_cache_buffer[:], data[:l])
		usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_control_cache_buffer))))
	} else {
		copy(udd_ep_in_cache_buffer[ep][:], data[:l])
		usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep]))))
	}

	// clear multi-packet size which is total bytes already sent
	usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Mask << usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos)

	// set byte count, which is total number of bytes to be sent
	usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
	usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE.SetBits((uint32(l) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask) << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
}

func ReceiveUSBControlPacket() ([cdcLineInfoSize]byte, error) {
	var b [cdcLineInfoSize]byte

	// address
	usbEndpointDescriptors[0].DeviceDescBank[0].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_out_cache_buffer[0]))))

	// set byte count to zero
	usbEndpointDescriptors[0].DeviceDescBank[0].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)

	// set ready for next data
	setEPSTATUSCLR(0, sam.USB_DEVICE_ENDPOINT_EPSTATUSCLR_BK0RDY)

	// Wait until OUT transfer is ready.
	timeout := 300000
	for (getEPSTATUS(0) & sam.USB_DEVICE_ENDPOINT_EPSTATUS_BK0RDY) == 0 {
		timeout--
		if timeout == 0 {
			return b, ErrUSBReadTimeout
		}
	}

	// Wait until OUT transfer is completed.
	timeout = 300000
	for (getEPINTFLAG(0) & sam.USB_DEVICE_ENDPOINT_EPINTFLAG_TRCPT0) == 0 {
		timeout--
		if timeout == 0 {
			return b, ErrUSBReadTimeout
		}
	}

	// get data
	bytesread := uint32((usbEndpointDescriptors[0].DeviceDescBank[0].PCKSIZE.Get() >>
		usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask)

	if bytesread != cdcLineInfoSize {
		return b, ErrUSBBytesRead
	}

	copy(b[:7], udd_ep_out_cache_buffer[0][:7])

	return b, nil
}

func handleEndpointRx(ep uint32) []byte {
	// get data
	count := int((usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.Get() >>
		usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask)

	return udd_ep_out_cache_buffer[ep][:count]
}

func handleEndpointRxComplete(ep uint32) {
	// set byte count to zero
	usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)

	// set multi packet size to 64
	usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.SetBits(64 << usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos)

	// set ready for next data
	setEPSTATUSCLR(ep, sam.USB_DEVICE_ENDPOINT_EPSTATUSCLR_BK0RDY)
}

func SendZlp() {
	usbEndpointDescriptors[0].DeviceDescBank[1].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
}

func epPacketSize(size uint16) uint32 {
	switch size {
	case 8:
		return 0
	case 16:
		return 1
	case 32:
		return 2
	case 64:
		return 3
	case 128:
		return 4
	case 256:
		return 5
	case 512:
		return 6
	case 1023:
		return 7
	default:
		return 0
	}
}

func getEPCFG(ep uint32) uint8 {
	return sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPCFG.Get()
}

func setEPCFG(ep uint32, val uint8) {
	sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPCFG.Set(val)
}

func setEPSTATUSCLR(ep uint32, val uint8) {
	sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPSTATUSCLR.Set(val)
}

func setEPSTATUSSET(ep uint32, val uint8) {
	sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPSTATUSSET.Set(val)
}

func getEPSTATUS(ep uint32) uint8 {
	return sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPSTATUS.Get()
}

func getEPINTFLAG(ep uint32) uint8 {
	return sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPINTFLAG.Get()
}

func setEPINTFLAG(ep uint32, val uint8) {
	sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPINTFLAG.Set(val)
}

func setEPINTENCLR(ep uint32, val uint8) {
	sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPINTENCLR.Set(val)
}

func setEPINTENSET(ep uint32, val uint8) {
	sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPINTENSET.Set(val)
}