m3pi_USBBeamBreaker - A optical beam breaker detector that appears to a…

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Chris Styles / Mbed 2 deprecated m3pi_USBBeamBreaker

A optical beam breaker detector that appears to aPC as a USB keyboard, typing characters when the beam is broken

USBMouse/usbdevice.cpp@1:45de28d7be8e, 2011-05-12 (annotated)

Committer:: chris
Date:: Thu May 12 16:46:53 2011 +0000
Revision:: 1:45de28d7be8e
Parent:: 0:9d0f47bc66da

Who changed what in which revision?

User	Revision	Line number	New contents of line
chris	0:9d0f47bc66da	1	/* usbdevice.cpp */
chris	0:9d0f47bc66da	2	/* Generic USB device */
chris	0:9d0f47bc66da	3	/* Copyright (c) Phil Wright 2008 */
chris	0:9d0f47bc66da	4
chris	0:9d0f47bc66da	5	#include "mbed.h"
chris	0:9d0f47bc66da	6	#include "usbdevice.h"
chris	0:9d0f47bc66da	7
chris	0:9d0f47bc66da	8	/* Standard requests */
chris	0:9d0f47bc66da	9	#define GET_STATUS (0)
chris	0:9d0f47bc66da	10	#define CLEAR_FEATURE (1)
chris	0:9d0f47bc66da	11	#define SET_FEATURE (3)
chris	0:9d0f47bc66da	12	#define SET_ADDRESS (5)
chris	0:9d0f47bc66da	13	#define GET_DESCRIPTOR (6)
chris	0:9d0f47bc66da	14	#define SET_DESCRIPTOR (7)
chris	0:9d0f47bc66da	15	#define GET_CONFIGURATION (8)
chris	0:9d0f47bc66da	16	#define SET_CONFIGURATION (9)
chris	0:9d0f47bc66da	17	#define GET_INTERFACE (10)
chris	0:9d0f47bc66da	18	#define SET_INTERFACE (11)
chris	0:9d0f47bc66da	19
chris	0:9d0f47bc66da	20	/* Device status */
chris	0:9d0f47bc66da	21	#define DEVICE_STATUS_SELF_POWERED (1<<0)
chris	0:9d0f47bc66da	22	#define DEVICE_STATUS_REMOTE_WAKEUP (1<<1)
chris	0:9d0f47bc66da	23
chris	0:9d0f47bc66da	24	/* Endpoint status */
chris	0:9d0f47bc66da	25	#define ENDPOINT_STATUS_HALT (1<<0)
chris	0:9d0f47bc66da	26
chris	0:9d0f47bc66da	27	/* Standard feature selectors */
chris	0:9d0f47bc66da	28	#define DEVICE_REMOTE_WAKEUP (1)
chris	0:9d0f47bc66da	29	#define ENDPOINT_HALT (0)
chris	0:9d0f47bc66da	30
chris	0:9d0f47bc66da	31	/* Macro to convert wIndex endpoint number to physical endpoint number */
chris	0:9d0f47bc66da	32	#define WINDEX_TO_PHYSICAL(endpoint) (((endpoint & 0x0f) << 1) + ((endpoint & 0x80) ? 1 : 0))
chris	0:9d0f47bc66da	33
chris	0:9d0f47bc66da	34	CONTROL_TRANSFER transfer;
chris	0:9d0f47bc66da	35	USB_DEVICE device;
chris	0:9d0f47bc66da	36
chris	0:9d0f47bc66da	37	usbdevice::usbdevice()
chris	0:9d0f47bc66da	38	{
chris	0:9d0f47bc66da	39	/* Set initial device state */
chris	0:9d0f47bc66da	40	device.state = POWERED;
chris	0:9d0f47bc66da	41	device.configuration = 0;
chris	0:9d0f47bc66da	42	device.suspended = false;
chris	0:9d0f47bc66da	43
chris	0:9d0f47bc66da	44	/* Set the maximum packet size for the control endpoints */
chris	0:9d0f47bc66da	45	realiseEndpoint(EP0IN, MAX_PACKET_SIZE_EP0);
chris	0:9d0f47bc66da	46	realiseEndpoint(EP0OUT, MAX_PACKET_SIZE_EP0);
chris	0:9d0f47bc66da	47
chris	0:9d0f47bc66da	48	/* Enable endpoint events for EP0 */
chris	0:9d0f47bc66da	49	enableEndpointEvent(EP0IN);
chris	0:9d0f47bc66da	50	enableEndpointEvent(EP0OUT);
chris	0:9d0f47bc66da	51	}
chris	0:9d0f47bc66da	52
chris	0:9d0f47bc66da	53	void usbdevice::endpointEventEP0Setup(void)
chris	0:9d0f47bc66da	54	{
chris	0:9d0f47bc66da	55	/* Endpoint 0 setup event */
chris	0:9d0f47bc66da	56	if (!controlSetup())
chris	0:9d0f47bc66da	57	{
chris	0:9d0f47bc66da	58	/* Protocol stall; this will stall both endpoints */
chris	0:9d0f47bc66da	59	stallEndpoint(EP0OUT);
chris	0:9d0f47bc66da	60	}
chris	0:9d0f47bc66da	61	}
chris	0:9d0f47bc66da	62
chris	0:9d0f47bc66da	63	void usbdevice::endpointEventEP0Out(void)
chris	0:9d0f47bc66da	64	{
chris	0:9d0f47bc66da	65	/* Endpoint 0 OUT data event */
chris	0:9d0f47bc66da	66	if (!controlOut())
chris	0:9d0f47bc66da	67	{
chris	0:9d0f47bc66da	68	/* Protocol stall; this will stall both endpoints */
chris	0:9d0f47bc66da	69	stallEndpoint(EP0OUT);
chris	0:9d0f47bc66da	70	}
chris	0:9d0f47bc66da	71	}
chris	0:9d0f47bc66da	72
chris	0:9d0f47bc66da	73	void usbdevice::endpointEventEP0In(void)
chris	0:9d0f47bc66da	74	{
chris	0:9d0f47bc66da	75	/* Endpoint 0 IN data event */
chris	0:9d0f47bc66da	76	if (!controlIn())
chris	0:9d0f47bc66da	77	{
chris	0:9d0f47bc66da	78	/* Protocol stall; this will stall both endpoints */
chris	0:9d0f47bc66da	79	stallEndpoint(EP0OUT);
chris	0:9d0f47bc66da	80	}
chris	0:9d0f47bc66da	81	}
chris	0:9d0f47bc66da	82
chris	0:9d0f47bc66da	83	void usbdevice::deviceEventReset(void)
chris	0:9d0f47bc66da	84	{
chris	0:9d0f47bc66da	85	device.state = DEFAULT;
chris	0:9d0f47bc66da	86	device.configuration = 0;
chris	0:9d0f47bc66da	87	device.suspended = false;
chris	0:9d0f47bc66da	88	}
chris	0:9d0f47bc66da	89
chris	0:9d0f47bc66da	90	void usbdevice::decodeSetupPacket(unsigned char data, SETUP_PACKET packet)
chris	0:9d0f47bc66da	91	{
chris	0:9d0f47bc66da	92	/* Fill in the elements of a SETUP_PACKET structure from raw data */
chris	0:9d0f47bc66da	93	packet->bmRequestType.dataTransferDirection = (data[0] & 0x80) >> 7;
chris	0:9d0f47bc66da	94	packet->bmRequestType.Type = (data[0] & 0x60) >> 5;
chris	0:9d0f47bc66da	95	packet->bmRequestType.Recipient = data[0] & 0x1f;
chris	0:9d0f47bc66da	96	packet->bRequest = data[1];
chris	0:9d0f47bc66da	97	packet->wValue = (data[2] \| (unsigned short)data[3] << 8);
chris	0:9d0f47bc66da	98	packet->wIndex = (data[4] \| (unsigned short)data[5] << 8);
chris	0:9d0f47bc66da	99	packet->wLength = (data[6] \| (unsigned short)data[7] << 8);
chris	0:9d0f47bc66da	100	}
chris	0:9d0f47bc66da	101
chris	0:9d0f47bc66da	102	bool usbdevice::controlSetup(void)
chris	0:9d0f47bc66da	103	{
chris	0:9d0f47bc66da	104	/* Control transfer setup stage */
chris	0:9d0f47bc66da	105	unsigned char buffer[MAX_PACKET_SIZE_EP0];
chris	0:9d0f47bc66da	106	unsigned long count;
chris	0:9d0f47bc66da	107
chris	0:9d0f47bc66da	108	count = endpointRead(EP0OUT, buffer);
chris	0:9d0f47bc66da	109
chris	0:9d0f47bc66da	110	/* Must be 8 bytes of data */
chris	0:9d0f47bc66da	111	if (count != 8)
chris	0:9d0f47bc66da	112	{
chris	0:9d0f47bc66da	113	return false;
chris	0:9d0f47bc66da	114	}
chris	0:9d0f47bc66da	115
chris	0:9d0f47bc66da	116	/* Initialise control transfer state */
chris	0:9d0f47bc66da	117	decodeSetupPacket(buffer, &transfer.setup);
chris	0:9d0f47bc66da	118	transfer.ptr = NULL;
chris	0:9d0f47bc66da	119	transfer.remaining = 0;
chris	0:9d0f47bc66da	120	transfer.direction = 0;
chris	0:9d0f47bc66da	121	transfer.zlp = false;
chris	0:9d0f47bc66da	122
chris	0:9d0f47bc66da	123	/* Process request */
chris	0:9d0f47bc66da	124	if (!requestSetup())
chris	0:9d0f47bc66da	125	{
chris	0:9d0f47bc66da	126	return false;
chris	0:9d0f47bc66da	127	}
chris	0:9d0f47bc66da	128
chris	0:9d0f47bc66da	129	/* Check transfer size and direction */
chris	0:9d0f47bc66da	130	if (transfer.setup.wLength>0)
chris	0:9d0f47bc66da	131	{
chris	0:9d0f47bc66da	132	if (transfer.setup.bmRequestType.dataTransferDirection==DEVICE_TO_HOST)
chris	0:9d0f47bc66da	133	{
chris	0:9d0f47bc66da	134	/* IN data stage is required */
chris	0:9d0f47bc66da	135	if (transfer.direction != DEVICE_TO_HOST)
chris	0:9d0f47bc66da	136	{
chris	0:9d0f47bc66da	137	return false;
chris	0:9d0f47bc66da	138	}
chris	0:9d0f47bc66da	139
chris	0:9d0f47bc66da	140	/* Transfer must be less than or equal to the size requested by the host */
chris	0:9d0f47bc66da	141	if (transfer.remaining > transfer.setup.wLength)
chris	0:9d0f47bc66da	142	{
chris	0:9d0f47bc66da	143	transfer.remaining = transfer.setup.wLength;
chris	0:9d0f47bc66da	144	}
chris	0:9d0f47bc66da	145	}
chris	0:9d0f47bc66da	146	else
chris	0:9d0f47bc66da	147	{
chris	0:9d0f47bc66da	148	/* OUT data stage is required */
chris	0:9d0f47bc66da	149	if (transfer.direction != HOST_TO_DEVICE)
chris	0:9d0f47bc66da	150	{
chris	0:9d0f47bc66da	151	return false;
chris	0:9d0f47bc66da	152	}
chris	0:9d0f47bc66da	153
chris	0:9d0f47bc66da	154	/* Transfer must be equal to the size requested by the host */
chris	0:9d0f47bc66da	155	if (transfer.remaining != transfer.setup.wLength)
chris	0:9d0f47bc66da	156	{
chris	0:9d0f47bc66da	157	return false;
chris	0:9d0f47bc66da	158	}
chris	0:9d0f47bc66da	159	}
chris	0:9d0f47bc66da	160	}
chris	0:9d0f47bc66da	161	else
chris	0:9d0f47bc66da	162	{
chris	0:9d0f47bc66da	163	/* No data stage; transfer size must be zero */
chris	0:9d0f47bc66da	164	if (transfer.remaining != 0)
chris	0:9d0f47bc66da	165	{
chris	0:9d0f47bc66da	166	return false;
chris	0:9d0f47bc66da	167	}
chris	0:9d0f47bc66da	168	}
chris	0:9d0f47bc66da	169
chris	0:9d0f47bc66da	170	/* Data or status stage if applicable */
chris	0:9d0f47bc66da	171	if (transfer.setup.wLength>0)
chris	0:9d0f47bc66da	172	{
chris	0:9d0f47bc66da	173	if (transfer.setup.bmRequestType.dataTransferDirection==DEVICE_TO_HOST)
chris	0:9d0f47bc66da	174	{
chris	0:9d0f47bc66da	175	/* Check if we'll need to send a zero length packet at the end of this transfer */
chris	0:9d0f47bc66da	176	if (transfer.setup.wLength > transfer.remaining)
chris	0:9d0f47bc66da	177	{
chris	0:9d0f47bc66da	178	/* Device wishes to transfer less than host requested */
chris	0:9d0f47bc66da	179	if ((transfer.remaining % MAX_PACKET_SIZE_EP0) == 0)
chris	0:9d0f47bc66da	180	{
chris	0:9d0f47bc66da	181	/* Transfer is a multiple of EP0 max packet size */
chris	0:9d0f47bc66da	182	transfer.zlp = true;
chris	0:9d0f47bc66da	183	}
chris	0:9d0f47bc66da	184	}
chris	0:9d0f47bc66da	185
chris	0:9d0f47bc66da	186	/* IN stage */
chris	0:9d0f47bc66da	187	controlIn();
chris	0:9d0f47bc66da	188	}
chris	0:9d0f47bc66da	189	}
chris	0:9d0f47bc66da	190	else
chris	0:9d0f47bc66da	191	{
chris	0:9d0f47bc66da	192	/* Status stage */
chris	0:9d0f47bc66da	193	endpointWrite(EP0IN, NULL, 0);
chris	0:9d0f47bc66da	194	}
chris	0:9d0f47bc66da	195
chris	0:9d0f47bc66da	196	return true;
chris	0:9d0f47bc66da	197	}
chris	0:9d0f47bc66da	198
chris	0:9d0f47bc66da	199	bool usbdevice::controlOut(void)
chris	0:9d0f47bc66da	200	{
chris	0:9d0f47bc66da	201	/* Control transfer data OUT stage */
chris	0:9d0f47bc66da	202	unsigned char buffer[MAX_PACKET_SIZE_EP0];
chris	0:9d0f47bc66da	203	unsigned long packetSize;
chris	0:9d0f47bc66da	204
chris	0:9d0f47bc66da	205	/* Check we should be transferring data OUT */
chris	0:9d0f47bc66da	206	if (transfer.direction != HOST_TO_DEVICE)
chris	0:9d0f47bc66da	207	{
chris	0:9d0f47bc66da	208	return false;
chris	0:9d0f47bc66da	209	}
chris	0:9d0f47bc66da	210
chris	0:9d0f47bc66da	211	/* Read from endpoint */
chris	0:9d0f47bc66da	212	packetSize = endpointRead(EP0OUT, buffer);
chris	0:9d0f47bc66da	213
chris	0:9d0f47bc66da	214	/* Check if transfer size is valid */
chris	0:9d0f47bc66da	215	if (packetSize > transfer.remaining)
chris	0:9d0f47bc66da	216	{
chris	0:9d0f47bc66da	217	/* Too big */
chris	0:9d0f47bc66da	218	return false;
chris	0:9d0f47bc66da	219	}
chris	0:9d0f47bc66da	220
chris	0:9d0f47bc66da	221	/* Update transfer */
chris	0:9d0f47bc66da	222	transfer.ptr += packetSize;
chris	0:9d0f47bc66da	223	transfer.remaining -= packetSize;
chris	0:9d0f47bc66da	224
chris	0:9d0f47bc66da	225	/* Check if transfer has completed */
chris	0:9d0f47bc66da	226	if (transfer.remaining == 0)
chris	0:9d0f47bc66da	227	{
chris	0:9d0f47bc66da	228	/* Process request */
chris	0:9d0f47bc66da	229	if (!requestOut())
chris	0:9d0f47bc66da	230	{
chris	0:9d0f47bc66da	231	return false;
chris	0:9d0f47bc66da	232	}
chris	0:9d0f47bc66da	233
chris	0:9d0f47bc66da	234	/* Status stage */
chris	0:9d0f47bc66da	235	endpointWrite(EP0IN, NULL, 0);
chris	0:9d0f47bc66da	236	}
chris	0:9d0f47bc66da	237
chris	0:9d0f47bc66da	238	return true;
chris	0:9d0f47bc66da	239	}
chris	0:9d0f47bc66da	240
chris	0:9d0f47bc66da	241	bool usbdevice::controlIn(void)
chris	0:9d0f47bc66da	242	{
chris	0:9d0f47bc66da	243	/* Control transfer data IN stage */
chris	0:9d0f47bc66da	244	unsigned packetSize;
chris	0:9d0f47bc66da	245
chris	0:9d0f47bc66da	246	/* Check if transfer has completed (status stage transactions also have transfer.remaining == 0) */
chris	0:9d0f47bc66da	247	if (transfer.remaining == 0)
chris	0:9d0f47bc66da	248	{
chris	0:9d0f47bc66da	249	if (transfer.zlp)
chris	0:9d0f47bc66da	250	{
chris	0:9d0f47bc66da	251	/* Send zero length packet */
chris	0:9d0f47bc66da	252	endpointWrite(EP0IN, NULL, 0);
chris	0:9d0f47bc66da	253	transfer.zlp = false;
chris	0:9d0f47bc66da	254	}
chris	0:9d0f47bc66da	255
chris	0:9d0f47bc66da	256	/* Completed */
chris	0:9d0f47bc66da	257	return true;
chris	0:9d0f47bc66da	258	}
chris	0:9d0f47bc66da	259
chris	0:9d0f47bc66da	260	/* Check we should be transferring data IN */
chris	0:9d0f47bc66da	261	if (transfer.direction != DEVICE_TO_HOST)
chris	0:9d0f47bc66da	262	{
chris	0:9d0f47bc66da	263	return false;
chris	0:9d0f47bc66da	264	}
chris	0:9d0f47bc66da	265
chris	0:9d0f47bc66da	266	packetSize = transfer.remaining;
chris	0:9d0f47bc66da	267
chris	0:9d0f47bc66da	268	if (packetSize > MAX_PACKET_SIZE_EP0)
chris	0:9d0f47bc66da	269	{
chris	0:9d0f47bc66da	270	packetSize = MAX_PACKET_SIZE_EP0;
chris	0:9d0f47bc66da	271	}
chris	0:9d0f47bc66da	272
chris	0:9d0f47bc66da	273	/* Write to endpoint */
chris	0:9d0f47bc66da	274	endpointWrite(EP0IN, transfer.ptr, packetSize);
chris	0:9d0f47bc66da	275
chris	0:9d0f47bc66da	276	/* Update transfer */
chris	0:9d0f47bc66da	277	transfer.ptr += packetSize;
chris	0:9d0f47bc66da	278	transfer.remaining -= packetSize;
chris	0:9d0f47bc66da	279
chris	0:9d0f47bc66da	280	return true;
chris	0:9d0f47bc66da	281	}
chris	0:9d0f47bc66da	282
chris	0:9d0f47bc66da	283	bool usbdevice::requestSetup(void)
chris	0:9d0f47bc66da	284	{
chris	0:9d0f47bc66da	285	bool success = false;
chris	0:9d0f47bc66da	286
chris	0:9d0f47bc66da	287	/* Process standard requests */
chris	0:9d0f47bc66da	288	if ((transfer.setup.bmRequestType.Type == STANDARD_TYPE))
chris	0:9d0f47bc66da	289	{
chris	0:9d0f47bc66da	290	switch (transfer.setup.bRequest)
chris	0:9d0f47bc66da	291	{
chris	0:9d0f47bc66da	292	case GET_STATUS:
chris	0:9d0f47bc66da	293	success = requestGetStatus();
chris	0:9d0f47bc66da	294	break;
chris	0:9d0f47bc66da	295	case CLEAR_FEATURE:
chris	0:9d0f47bc66da	296	success = requestClearFeature();
chris	0:9d0f47bc66da	297	break;
chris	0:9d0f47bc66da	298	case SET_FEATURE:
chris	0:9d0f47bc66da	299	success = requestSetFeature();
chris	0:9d0f47bc66da	300	break;
chris	0:9d0f47bc66da	301	case SET_ADDRESS:
chris	0:9d0f47bc66da	302	success = requestSetAddress();
chris	0:9d0f47bc66da	303	break;
chris	0:9d0f47bc66da	304	case GET_DESCRIPTOR:
chris	0:9d0f47bc66da	305	success = requestGetDescriptor();
chris	0:9d0f47bc66da	306	break;
chris	0:9d0f47bc66da	307	case SET_DESCRIPTOR:
chris	0:9d0f47bc66da	308	/* TODO: Support is optional, not implemented here */
chris	0:9d0f47bc66da	309	success = false;
chris	0:9d0f47bc66da	310	break;
chris	0:9d0f47bc66da	311	case GET_CONFIGURATION:
chris	0:9d0f47bc66da	312	success = requestGetConfiguration();
chris	0:9d0f47bc66da	313	break;
chris	0:9d0f47bc66da	314	case SET_CONFIGURATION:
chris	0:9d0f47bc66da	315	success = requestSetConfiguration();
chris	0:9d0f47bc66da	316	break;
chris	0:9d0f47bc66da	317	case GET_INTERFACE:
chris	0:9d0f47bc66da	318	success = requestGetInterface();
chris	0:9d0f47bc66da	319	break;
chris	0:9d0f47bc66da	320	case SET_INTERFACE:
chris	0:9d0f47bc66da	321	success = requestSetInterface();
chris	0:9d0f47bc66da	322	break;
chris	0:9d0f47bc66da	323	default:
chris	0:9d0f47bc66da	324	break;
chris	0:9d0f47bc66da	325	}
chris	0:9d0f47bc66da	326	}
chris	0:9d0f47bc66da	327
chris	0:9d0f47bc66da	328	return success;
chris	0:9d0f47bc66da	329	}
chris	0:9d0f47bc66da	330
chris	0:9d0f47bc66da	331	bool usbdevice::requestOut(void)
chris	0:9d0f47bc66da	332	{
chris	0:9d0f47bc66da	333	return true;
chris	0:9d0f47bc66da	334	}
chris	0:9d0f47bc66da	335
chris	0:9d0f47bc66da	336	bool usbdevice::requestSetAddress(void)
chris	0:9d0f47bc66da	337	{
chris	0:9d0f47bc66da	338	/* Set the device address */
chris	0:9d0f47bc66da	339	setAddress(transfer.setup.wValue);
chris	0:9d0f47bc66da	340
chris	0:9d0f47bc66da	341	if (transfer.setup.wValue == 0)
chris	0:9d0f47bc66da	342	{
chris	0:9d0f47bc66da	343	device.state = DEFAULT;
chris	0:9d0f47bc66da	344	}
chris	0:9d0f47bc66da	345	else
chris	0:9d0f47bc66da	346	{
chris	0:9d0f47bc66da	347	device.state = ADDRESS;
chris	0:9d0f47bc66da	348	}
chris	0:9d0f47bc66da	349
chris	0:9d0f47bc66da	350	return true;
chris	0:9d0f47bc66da	351	}
chris	0:9d0f47bc66da	352
chris	0:9d0f47bc66da	353	bool usbdevice::requestSetConfiguration(void)
chris	0:9d0f47bc66da	354	{
chris	0:9d0f47bc66da	355	/* Set the device configuration */
chris	0:9d0f47bc66da	356	if (transfer.setup.wValue == 0)
chris	0:9d0f47bc66da	357	{
chris	0:9d0f47bc66da	358	/* Not configured */
chris	0:9d0f47bc66da	359	unconfigureDevice();
chris	0:9d0f47bc66da	360	device.state = ADDRESS;
chris	0:9d0f47bc66da	361	}
chris	0:9d0f47bc66da	362	else
chris	0:9d0f47bc66da	363	{
chris	0:9d0f47bc66da	364	configureDevice();
chris	0:9d0f47bc66da	365	device.state = CONFIGURED;
chris	0:9d0f47bc66da	366	}
chris	0:9d0f47bc66da	367
chris	0:9d0f47bc66da	368	/* TODO: We do not currently support multiple configurations, just keep a record of the configuration value */
chris	0:9d0f47bc66da	369	device.configuration = transfer.setup.wValue;
chris	0:9d0f47bc66da	370
chris	0:9d0f47bc66da	371	return true;
chris	0:9d0f47bc66da	372	}
chris	0:9d0f47bc66da	373
chris	0:9d0f47bc66da	374	bool usbdevice::requestGetConfiguration(void)
chris	0:9d0f47bc66da	375	{
chris	0:9d0f47bc66da	376	/* Send the device configuration */
chris	0:9d0f47bc66da	377	transfer.ptr = &device.configuration;
chris	0:9d0f47bc66da	378	transfer.remaining = sizeof(device.configuration);
chris	0:9d0f47bc66da	379	transfer.direction = DEVICE_TO_HOST;
chris	0:9d0f47bc66da	380	return true;
chris	0:9d0f47bc66da	381	}
chris	0:9d0f47bc66da	382
chris	0:9d0f47bc66da	383	bool usbdevice::requestGetInterface(void)
chris	0:9d0f47bc66da	384	{
chris	0:9d0f47bc66da	385	static unsigned char alternateSetting;
chris	0:9d0f47bc66da	386
chris	0:9d0f47bc66da	387	/* Return the selected alternate setting for an interface */
chris	0:9d0f47bc66da	388
chris	0:9d0f47bc66da	389	if (device.state != CONFIGURED)
chris	0:9d0f47bc66da	390	{
chris	0:9d0f47bc66da	391	return false;
chris	0:9d0f47bc66da	392	}
chris	0:9d0f47bc66da	393
chris	0:9d0f47bc66da	394	/* TODO: We currently do not support alternate settings so always return zero */
chris	0:9d0f47bc66da	395	/* TODO: Should check that the interface number is valid */
chris	0:9d0f47bc66da	396	alternateSetting = 0;
chris	0:9d0f47bc66da	397
chris	0:9d0f47bc66da	398	/* Send the alternate setting */
chris	0:9d0f47bc66da	399	transfer.ptr = &alternateSetting;
chris	0:9d0f47bc66da	400	transfer.remaining = sizeof(alternateSetting);
chris	0:9d0f47bc66da	401	transfer.direction = DEVICE_TO_HOST;
chris	0:9d0f47bc66da	402	return true;
chris	0:9d0f47bc66da	403	}
chris	0:9d0f47bc66da	404
chris	0:9d0f47bc66da	405	bool usbdevice::requestSetInterface(void)
chris	0:9d0f47bc66da	406	{
chris	0:9d0f47bc66da	407	/* TODO: We currently do not support alternate settings, return false */
chris	0:9d0f47bc66da	408	return false;
chris	0:9d0f47bc66da	409	}
chris	0:9d0f47bc66da	410
chris	0:9d0f47bc66da	411	bool usbdevice::requestSetFeature()
chris	0:9d0f47bc66da	412	{
chris	0:9d0f47bc66da	413	bool success = false;
chris	0:9d0f47bc66da	414
chris	0:9d0f47bc66da	415	if (device.state != CONFIGURED)
chris	0:9d0f47bc66da	416	{
chris	0:9d0f47bc66da	417	/* Endpoint or interface must be zero */
chris	0:9d0f47bc66da	418	if (transfer.setup.wIndex != 0)
chris	0:9d0f47bc66da	419	{
chris	0:9d0f47bc66da	420	return false;
chris	0:9d0f47bc66da	421	}
chris	0:9d0f47bc66da	422	}
chris	0:9d0f47bc66da	423
chris	0:9d0f47bc66da	424	switch (transfer.setup.bmRequestType.Recipient)
chris	0:9d0f47bc66da	425	{
chris	0:9d0f47bc66da	426	case DEVICE_RECIPIENT:
chris	0:9d0f47bc66da	427	/* TODO: Remote wakeup feature not supported */
chris	0:9d0f47bc66da	428	break;
chris	0:9d0f47bc66da	429	case ENDPOINT_RECIPIENT:
chris	0:9d0f47bc66da	430	if (transfer.setup.wValue == ENDPOINT_HALT)
chris	0:9d0f47bc66da	431	{
chris	0:9d0f47bc66da	432	/* TODO: We should check that the endpoint number is valid */
chris	0:9d0f47bc66da	433	stallEndpoint(WINDEX_TO_PHYSICAL(transfer.setup.wIndex));
chris	0:9d0f47bc66da	434	success = true;
chris	0:9d0f47bc66da	435	}
chris	0:9d0f47bc66da	436	break;
chris	0:9d0f47bc66da	437	default:
chris	0:9d0f47bc66da	438	break;
chris	0:9d0f47bc66da	439	}
chris	0:9d0f47bc66da	440
chris	0:9d0f47bc66da	441	return success;
chris	0:9d0f47bc66da	442	}
chris	0:9d0f47bc66da	443
chris	0:9d0f47bc66da	444	bool usbdevice::requestClearFeature()
chris	0:9d0f47bc66da	445	{
chris	0:9d0f47bc66da	446	bool success = false;
chris	0:9d0f47bc66da	447
chris	0:9d0f47bc66da	448	if (device.state != CONFIGURED)
chris	0:9d0f47bc66da	449	{
chris	0:9d0f47bc66da	450	/* Endpoint or interface must be zero */
chris	0:9d0f47bc66da	451	if (transfer.setup.wIndex != 0)
chris	0:9d0f47bc66da	452	{
chris	0:9d0f47bc66da	453	return false;
chris	0:9d0f47bc66da	454	}
chris	0:9d0f47bc66da	455	}
chris	0:9d0f47bc66da	456
chris	0:9d0f47bc66da	457	switch (transfer.setup.bmRequestType.Recipient)
chris	0:9d0f47bc66da	458	{
chris	0:9d0f47bc66da	459	case DEVICE_RECIPIENT:
chris	0:9d0f47bc66da	460	/* TODO: Remote wakeup feature not supported */
chris	0:9d0f47bc66da	461	break;
chris	0:9d0f47bc66da	462	case ENDPOINT_RECIPIENT:
chris	0:9d0f47bc66da	463	/* TODO: We should check that the endpoint number is valid */
chris	0:9d0f47bc66da	464	if (transfer.setup.wValue == ENDPOINT_HALT)
chris	0:9d0f47bc66da	465	{
chris	0:9d0f47bc66da	466	unstallEndpoint(WINDEX_TO_PHYSICAL(transfer.setup.wIndex));
chris	0:9d0f47bc66da	467	success = true;
chris	0:9d0f47bc66da	468	}
chris	0:9d0f47bc66da	469	break;
chris	0:9d0f47bc66da	470	default:
chris	0:9d0f47bc66da	471	break;
chris	0:9d0f47bc66da	472	}
chris	0:9d0f47bc66da	473
chris	0:9d0f47bc66da	474	return success;
chris	0:9d0f47bc66da	475	}
chris	0:9d0f47bc66da	476
chris	0:9d0f47bc66da	477	bool usbdevice::requestGetStatus(void)
chris	0:9d0f47bc66da	478	{
chris	0:9d0f47bc66da	479	static unsigned short status;
chris	0:9d0f47bc66da	480	bool success = false;
chris	0:9d0f47bc66da	481
chris	0:9d0f47bc66da	482	if (device.state != CONFIGURED)
chris	0:9d0f47bc66da	483	{
chris	0:9d0f47bc66da	484	/* Endpoint or interface must be zero */
chris	0:9d0f47bc66da	485	if (transfer.setup.wIndex != 0)
chris	0:9d0f47bc66da	486	{
chris	0:9d0f47bc66da	487	return false;
chris	0:9d0f47bc66da	488	}
chris	0:9d0f47bc66da	489	}
chris	0:9d0f47bc66da	490
chris	0:9d0f47bc66da	491	switch (transfer.setup.bmRequestType.Recipient)
chris	0:9d0f47bc66da	492	{
chris	0:9d0f47bc66da	493	case DEVICE_RECIPIENT:
chris	0:9d0f47bc66da	494	/* TODO: Currently only supports self powered devices */
chris	0:9d0f47bc66da	495	status = DEVICE_STATUS_SELF_POWERED;
chris	0:9d0f47bc66da	496	success = true;
chris	0:9d0f47bc66da	497	break;
chris	0:9d0f47bc66da	498	case INTERFACE_RECIPIENT:
chris	0:9d0f47bc66da	499	status = 0;
chris	0:9d0f47bc66da	500	success = true;
chris	0:9d0f47bc66da	501	break;
chris	0:9d0f47bc66da	502	case ENDPOINT_RECIPIENT:
chris	0:9d0f47bc66da	503	/* TODO: We should check that the endpoint number is valid */
chris	0:9d0f47bc66da	504	if (getEndpointStallState(WINDEX_TO_PHYSICAL(transfer.setup.wIndex)))
chris	0:9d0f47bc66da	505	{
chris	0:9d0f47bc66da	506	status = ENDPOINT_STATUS_HALT;
chris	0:9d0f47bc66da	507	}
chris	0:9d0f47bc66da	508	else
chris	0:9d0f47bc66da	509	{
chris	0:9d0f47bc66da	510	status = 0;
chris	0:9d0f47bc66da	511	}
chris	0:9d0f47bc66da	512	success = true;
chris	0:9d0f47bc66da	513	break;
chris	0:9d0f47bc66da	514	default:
chris	0:9d0f47bc66da	515	break;
chris	0:9d0f47bc66da	516	}
chris	0:9d0f47bc66da	517
chris	0:9d0f47bc66da	518	if (success)
chris	0:9d0f47bc66da	519	{
chris	0:9d0f47bc66da	520	/* Send the status */
chris	0:9d0f47bc66da	521	transfer.ptr = (unsigned char )&status; / Assumes little endian */
chris	0:9d0f47bc66da	522	transfer.remaining = sizeof(status);
chris	0:9d0f47bc66da	523	transfer.direction = DEVICE_TO_HOST;
chris	0:9d0f47bc66da	524	}
chris	0:9d0f47bc66da	525
chris	0:9d0f47bc66da	526	return success;
chris	0:9d0f47bc66da	527	}
chris	0:9d0f47bc66da	528
chris	0:9d0f47bc66da	529	bool usbdevice::requestGetDescriptor(void)
chris	0:9d0f47bc66da	530	{
chris	0:9d0f47bc66da	531	return false;
chris	0:9d0f47bc66da	532	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	12 May 2011
Imports:	22
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	1
Followers:	1

USBMouse/usbdevice.cpp@1:45de28d7be8e, 2011-05-12 (annotated)

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