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/usbdc.cpp@0:9d0f47bc66da, 2011-05-12 (annotated)

Committer:: chris
Date:: Thu May 12 16:44:09 2011 +0000
Revision:: 0:9d0f47bc66da

Who changed what in which revision?

User	Revision	Line number	New contents of line
chris	0:9d0f47bc66da	1	/* usbdc.cpp */
chris	0:9d0f47bc66da	2	/* USB device controller */
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 "usbdc.h"
chris	0:9d0f47bc66da	7	#include "cmsis.h"
chris	0:9d0f47bc66da	8
chris	0:9d0f47bc66da	9	#ifdef TARGET_LPC2368
chris	0:9d0f47bc66da	10	#undef LPC_USB_BASE
chris	0:9d0f47bc66da	11	#define LPC_USB_BASE (0xFFE0C000) /* TODO */
chris	0:9d0f47bc66da	12	#endif
chris	0:9d0f47bc66da	13
chris	0:9d0f47bc66da	14	/* Power Control for Peripherals register */
chris	0:9d0f47bc66da	15	#define PCUSB ((unsigned long)1<<31)
chris	0:9d0f47bc66da	16
chris	0:9d0f47bc66da	17	/* USB Clock Control register */
chris	0:9d0f47bc66da	18	#define DEV_CLK_EN ((unsigned long)1<<1)
chris	0:9d0f47bc66da	19	#define AHB_CLK_EN ((unsigned long)1<<4)
chris	0:9d0f47bc66da	20
chris	0:9d0f47bc66da	21	/* USB Clock Status register */
chris	0:9d0f47bc66da	22	#define DEV_CLK_ON ((unsigned long)1<<1)
chris	0:9d0f47bc66da	23	#define AHB_CLK_ON ((unsigned long)1<<4)
chris	0:9d0f47bc66da	24
chris	0:9d0f47bc66da	25	/* USB Device Interupt registers */
chris	0:9d0f47bc66da	26	#define FRAME ((unsigned long)1<<0)
chris	0:9d0f47bc66da	27	#define EP_FAST ((unsigned long)1<<1)
chris	0:9d0f47bc66da	28	#define EP_SLOW ((unsigned long)1<<2)
chris	0:9d0f47bc66da	29	#define DEV_STAT ((unsigned long)1<<3)
chris	0:9d0f47bc66da	30	#define CCEMPTY ((unsigned long)1<<4)
chris	0:9d0f47bc66da	31	#define CDFULL ((unsigned long)1<<5)
chris	0:9d0f47bc66da	32	#define RxENDPKT ((unsigned long)1<<6)
chris	0:9d0f47bc66da	33	#define TxENDPKT ((unsigned long)1<<7)
chris	0:9d0f47bc66da	34	#define EP_RLZED ((unsigned long)1<<8)
chris	0:9d0f47bc66da	35	#define ERR_INT ((unsigned long)1<<9)
chris	0:9d0f47bc66da	36
chris	0:9d0f47bc66da	37	/* Endpoint Interrupt Registers */
chris	0:9d0f47bc66da	38	#define EP(endpoint) (1<<endpoint)
chris	0:9d0f47bc66da	39
chris	0:9d0f47bc66da	40	/* USB Control register */
chris	0:9d0f47bc66da	41	#define RD_EN (1<<0)
chris	0:9d0f47bc66da	42	#define WR_EN (1<<1)
chris	0:9d0f47bc66da	43	#define LOG_ENDPOINT(endpoint) ((endpoint>>1)<<2)
chris	0:9d0f47bc66da	44
chris	0:9d0f47bc66da	45	/* USB Receive Packet Length register */
chris	0:9d0f47bc66da	46	#define DV ((unsigned long)1<<10)
chris	0:9d0f47bc66da	47	#define PKT_RDY ((unsigned long)1<<11)
chris	0:9d0f47bc66da	48	#define PKT_LNGTH_MASK (0x3ff)
chris	0:9d0f47bc66da	49
chris	0:9d0f47bc66da	50	/* Serial Interface Engine (SIE) */
chris	0:9d0f47bc66da	51	#define SIE_WRITE (0x01)
chris	0:9d0f47bc66da	52	#define SIE_READ (0x02)
chris	0:9d0f47bc66da	53	#define SIE_COMMAND (0x05)
chris	0:9d0f47bc66da	54	#define SIE_CMD_CODE(phase, data) ((phase<<8)\|(data<<16))
chris	0:9d0f47bc66da	55
chris	0:9d0f47bc66da	56	/* SIE Command codes */
chris	0:9d0f47bc66da	57	#define SIE_CMD_SET_ADDRESS (0xD0)
chris	0:9d0f47bc66da	58	#define SIE_CMD_CONFIGURE_DEVICE (0xD8)
chris	0:9d0f47bc66da	59	#define SIE_CMD_SET_MODE (0xF3)
chris	0:9d0f47bc66da	60	#define SIE_CMD_READ_FRAME_NUMBER (0xF5)
chris	0:9d0f47bc66da	61	#define SIE_CMD_READ_TEST_REGISTER (0xFD)
chris	0:9d0f47bc66da	62	#define SIE_CMD_SET_DEVICE_STATUS (0xFE)
chris	0:9d0f47bc66da	63	#define SIE_CMD_GET_DEVICE_STATUS (0xFE)
chris	0:9d0f47bc66da	64	#define SIE_CMD_GET_ERROR_CODE (0xFF)
chris	0:9d0f47bc66da	65	#define SIE_CMD_READ_ERROR_STATUS (0xFB)
chris	0:9d0f47bc66da	66
chris	0:9d0f47bc66da	67	#define SIE_CMD_SELECT_ENDPOINT(endpoint) (0x00+endpoint)
chris	0:9d0f47bc66da	68	#define SIE_CMD_SELECT_ENDPOINT_CLEAR_INTERRUPT(endpoint) (0x40+endpoint)
chris	0:9d0f47bc66da	69	#define SIE_CMD_SET_ENDPOINT_STATUS(endpoint) (0x40+endpoint)
chris	0:9d0f47bc66da	70
chris	0:9d0f47bc66da	71	#define SIE_CMD_CLEAR_BUFFER (0xF2)
chris	0:9d0f47bc66da	72	#define SIE_CMD_VALIDATE_BUFFER (0xFA)
chris	0:9d0f47bc66da	73
chris	0:9d0f47bc66da	74	/* SIE Device Status register */
chris	0:9d0f47bc66da	75	#define SIE_DS_CON (1<<0)
chris	0:9d0f47bc66da	76	#define SIE_DS_CON_CH (1<<1)
chris	0:9d0f47bc66da	77	#define SIE_DS_SUS (1<<2)
chris	0:9d0f47bc66da	78	#define SIE_DS_SUS_CH (1<<3)
chris	0:9d0f47bc66da	79	#define SIE_DS_RST (1<<4)
chris	0:9d0f47bc66da	80
chris	0:9d0f47bc66da	81	/* SIE Device Set Address register */
chris	0:9d0f47bc66da	82	#define SIE_DSA_DEV_EN (1<<7)
chris	0:9d0f47bc66da	83
chris	0:9d0f47bc66da	84	/* SIE Configue Device register */
chris	0:9d0f47bc66da	85	#define SIE_CONF_DEVICE (1<<0)
chris	0:9d0f47bc66da	86
chris	0:9d0f47bc66da	87	/* Select Endpoint register */
chris	0:9d0f47bc66da	88	#define SIE_SE_FE (1<<0)
chris	0:9d0f47bc66da	89	#define SIE_SE_ST (1<<1)
chris	0:9d0f47bc66da	90	#define SIE_SE_STP (1<<2)
chris	0:9d0f47bc66da	91	#define SIE_SE_PO (1<<3)
chris	0:9d0f47bc66da	92	#define SIE_SE_EPN (1<<4)
chris	0:9d0f47bc66da	93	#define SIE_SE_B_1_FULL (1<<5)
chris	0:9d0f47bc66da	94	#define SIE_SE_B_2_FULL (1<<6)
chris	0:9d0f47bc66da	95
chris	0:9d0f47bc66da	96	/* Set Endpoint Status command */
chris	0:9d0f47bc66da	97	#define SIE_SES_ST (1<<0)
chris	0:9d0f47bc66da	98	#define SIE_SES_DA (1<<5)
chris	0:9d0f47bc66da	99	#define SIE_SES_RF_MO (1<<6)
chris	0:9d0f47bc66da	100	#define SIE_SES_CND_ST (1<<7)
chris	0:9d0f47bc66da	101
chris	0:9d0f47bc66da	102	usbdc *usbdc::instance;
chris	0:9d0f47bc66da	103
chris	0:9d0f47bc66da	104	usbdc::usbdc()
chris	0:9d0f47bc66da	105	{
chris	0:9d0f47bc66da	106	#ifdef TARGET_LPC1768
chris	0:9d0f47bc66da	107	LPC_SC->USBCLKCFG=5; /* TODO */
chris	0:9d0f47bc66da	108	#endif
chris	0:9d0f47bc66da	109
chris	0:9d0f47bc66da	110	/* Enable power to USB device controller */
chris	0:9d0f47bc66da	111	LPC_SC->PCONP \|= PCUSB;
chris	0:9d0f47bc66da	112
chris	0:9d0f47bc66da	113	/* Enable USB clocks */
chris	0:9d0f47bc66da	114	LPC_USB->USBClkCtrl \|= DEV_CLK_EN \| AHB_CLK_EN;
chris	0:9d0f47bc66da	115	while (LPC_USB->USBClkSt != (DEV_CLK_ON \| AHB_CLK_ON));
chris	0:9d0f47bc66da	116
chris	0:9d0f47bc66da	117	/* Configure pins P0.29 and P0.30 to be USB D+ and USB D- */
chris	0:9d0f47bc66da	118	LPC_PINCON->PINSEL1 &= 0xc3ffffff;
chris	0:9d0f47bc66da	119	LPC_PINCON->PINSEL1 \|= 0x14000000;
chris	0:9d0f47bc66da	120
chris	0:9d0f47bc66da	121	#ifdef ENABLE_VBUS
chris	0:9d0f47bc66da	122	/* Configure pin P1.30 to be VBUS */
chris	0:9d0f47bc66da	123	LPC_PINCON->PINSEL3 &= 0xcfffffff;
chris	0:9d0f47bc66da	124	LPC_PINCON->PINSEL3 \|= 0x20000000;
chris	0:9d0f47bc66da	125
chris	0:9d0f47bc66da	126	/* Configure pin P1.30 to have pull-down */
chris	0:9d0f47bc66da	127	LPC_PINCON->PINMODE3 \|= 0x30000000;
chris	0:9d0f47bc66da	128	#endif
chris	0:9d0f47bc66da	129
chris	0:9d0f47bc66da	130	/* Configure pin P2.9 to be Connect */
chris	0:9d0f47bc66da	131	LPC_PINCON->PINSEL4 &= 0xfffcffff;
chris	0:9d0f47bc66da	132	LPC_PINCON->PINSEL4 \|= 0x00040000;
chris	0:9d0f47bc66da	133
chris	0:9d0f47bc66da	134	/* Connect must be low for at least 2.5uS */
chris	0:9d0f47bc66da	135	wait_ms(1);
chris	0:9d0f47bc66da	136
chris	0:9d0f47bc66da	137	/* Attach IRQ */
chris	0:9d0f47bc66da	138	instance = this;
chris	0:9d0f47bc66da	139	NVIC_SetVector(USB_IRQn, (uint32_t)&_usbisr);
chris	0:9d0f47bc66da	140	NVIC_EnableIRQ(USB_IRQn);
chris	0:9d0f47bc66da	141
chris	0:9d0f47bc66da	142	/* Enable device interrupts */
chris	0:9d0f47bc66da	143	enableEvents();
chris	0:9d0f47bc66da	144	}
chris	0:9d0f47bc66da	145
chris	0:9d0f47bc66da	146	void usbdc::connect(void)
chris	0:9d0f47bc66da	147	{
chris	0:9d0f47bc66da	148	/* Connect USB device */
chris	0:9d0f47bc66da	149	unsigned char status;
chris	0:9d0f47bc66da	150
chris	0:9d0f47bc66da	151	status = getDeviceStatus();
chris	0:9d0f47bc66da	152	setDeviceStatus(status \| SIE_DS_CON);
chris	0:9d0f47bc66da	153	}
chris	0:9d0f47bc66da	154
chris	0:9d0f47bc66da	155	void usbdc::disconnect(void)
chris	0:9d0f47bc66da	156	{
chris	0:9d0f47bc66da	157	/* Disconnect USB device */
chris	0:9d0f47bc66da	158	unsigned char status;
chris	0:9d0f47bc66da	159
chris	0:9d0f47bc66da	160	status = getDeviceStatus();
chris	0:9d0f47bc66da	161	setDeviceStatus(status & ~SIE_DS_CON);
chris	0:9d0f47bc66da	162	}
chris	0:9d0f47bc66da	163
chris	0:9d0f47bc66da	164	void usbdc::SIECommand(unsigned long command)
chris	0:9d0f47bc66da	165	{
chris	0:9d0f47bc66da	166	/* The command phase of a SIE transaction */
chris	0:9d0f47bc66da	167	LPC_USB->USBDevIntClr = CCEMPTY;
chris	0:9d0f47bc66da	168	LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_COMMAND, command);
chris	0:9d0f47bc66da	169	while (!(LPC_USB->USBDevIntSt & CCEMPTY));
chris	0:9d0f47bc66da	170	}
chris	0:9d0f47bc66da	171
chris	0:9d0f47bc66da	172	void usbdc::SIEWriteData(unsigned char data)
chris	0:9d0f47bc66da	173	{
chris	0:9d0f47bc66da	174	/* The data write phase of a SIE transaction */
chris	0:9d0f47bc66da	175	LPC_USB->USBDevIntClr = CCEMPTY;
chris	0:9d0f47bc66da	176	LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_WRITE, data);
chris	0:9d0f47bc66da	177	while (!(LPC_USB->USBDevIntSt & CCEMPTY));
chris	0:9d0f47bc66da	178	}
chris	0:9d0f47bc66da	179
chris	0:9d0f47bc66da	180	unsigned char usbdc::SIEReadData(unsigned long command)
chris	0:9d0f47bc66da	181	{
chris	0:9d0f47bc66da	182	/* The data read phase of a SIE transaction */
chris	0:9d0f47bc66da	183	LPC_USB->USBDevIntClr = CDFULL;
chris	0:9d0f47bc66da	184	LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_READ, command);
chris	0:9d0f47bc66da	185	while (!(LPC_USB->USBDevIntSt & CDFULL));
chris	0:9d0f47bc66da	186	return (unsigned char)LPC_USB->USBCmdData;
chris	0:9d0f47bc66da	187	}
chris	0:9d0f47bc66da	188
chris	0:9d0f47bc66da	189	void usbdc::setDeviceStatus(unsigned char status)
chris	0:9d0f47bc66da	190	{
chris	0:9d0f47bc66da	191	/* Write SIE device status register */
chris	0:9d0f47bc66da	192	SIECommand(SIE_CMD_SET_DEVICE_STATUS);
chris	0:9d0f47bc66da	193	SIEWriteData(status);
chris	0:9d0f47bc66da	194	}
chris	0:9d0f47bc66da	195
chris	0:9d0f47bc66da	196	unsigned char usbdc::getDeviceStatus(void)
chris	0:9d0f47bc66da	197	{
chris	0:9d0f47bc66da	198	/* Read SIE device status register */
chris	0:9d0f47bc66da	199	SIECommand(SIE_CMD_GET_DEVICE_STATUS);
chris	0:9d0f47bc66da	200	return SIEReadData(SIE_CMD_GET_DEVICE_STATUS);
chris	0:9d0f47bc66da	201	}
chris	0:9d0f47bc66da	202
chris	0:9d0f47bc66da	203	void usbdc::setAddress(unsigned char address)
chris	0:9d0f47bc66da	204	{
chris	0:9d0f47bc66da	205	/* Write SIE device address register */
chris	0:9d0f47bc66da	206	SIECommand(SIE_CMD_SET_ADDRESS);
chris	0:9d0f47bc66da	207	SIEWriteData((address & 0x7f) \| SIE_DSA_DEV_EN);
chris	0:9d0f47bc66da	208	}
chris	0:9d0f47bc66da	209
chris	0:9d0f47bc66da	210	unsigned char usbdc::selectEndpoint(unsigned char endpoint)
chris	0:9d0f47bc66da	211	{
chris	0:9d0f47bc66da	212	/* SIE select endpoint command */
chris	0:9d0f47bc66da	213	SIECommand(SIE_CMD_SELECT_ENDPOINT(endpoint));
chris	0:9d0f47bc66da	214	return SIEReadData(SIE_CMD_SELECT_ENDPOINT(endpoint));
chris	0:9d0f47bc66da	215	}
chris	0:9d0f47bc66da	216
chris	0:9d0f47bc66da	217	#if 1
chris	0:9d0f47bc66da	218	unsigned char usbdc::selectEndpointClearInterrupt(unsigned char endpoint)
chris	0:9d0f47bc66da	219	{
chris	0:9d0f47bc66da	220	/* SIE select endpoint and clear interrupt command */
chris	0:9d0f47bc66da	221	/* Using the Select Endpoint / Clear Interrupt SIE command does not seem */
chris	0:9d0f47bc66da	222	/* to clear the appropriate bit in EP_INT_STAT? - using EP_INT_CLR instead */
chris	0:9d0f47bc66da	223	LPC_USB->USBEpIntClr = EP(endpoint);
chris	0:9d0f47bc66da	224	while (!(LPC_USB->USBDevIntSt & CDFULL));
chris	0:9d0f47bc66da	225	return (unsigned char)LPC_USB->USBCmdData;
chris	0:9d0f47bc66da	226	}
chris	0:9d0f47bc66da	227	#else
chris	0:9d0f47bc66da	228	unsigned char usbdc::selectEndpointClearInterrupt(unsigned char endpoint)
chris	0:9d0f47bc66da	229	{
chris	0:9d0f47bc66da	230	/* SIE select endpoint and clear interrupt command */
chris	0:9d0f47bc66da	231	SIECommand(SIE_CMD_SELECT_ENDPOINT_CLEAR_INTERRUPT(endpoint));
chris	0:9d0f47bc66da	232	return SIEReadData(SIE_CMD_SELECT_ENDPOINT_CLEAR_INTERRUPT(endpoint));
chris	0:9d0f47bc66da	233	}
chris	0:9d0f47bc66da	234	#endif
chris	0:9d0f47bc66da	235
chris	0:9d0f47bc66da	236	unsigned char usbdc::clearBuffer(void)
chris	0:9d0f47bc66da	237	{
chris	0:9d0f47bc66da	238	/* SIE clear buffer command */
chris	0:9d0f47bc66da	239	SIECommand(SIE_CMD_CLEAR_BUFFER);
chris	0:9d0f47bc66da	240	return SIEReadData(SIE_CMD_CLEAR_BUFFER);
chris	0:9d0f47bc66da	241	}
chris	0:9d0f47bc66da	242
chris	0:9d0f47bc66da	243	void usbdc::validateBuffer(void)
chris	0:9d0f47bc66da	244	{
chris	0:9d0f47bc66da	245	/* SIE validate buffer command */
chris	0:9d0f47bc66da	246	SIECommand(SIE_CMD_VALIDATE_BUFFER);
chris	0:9d0f47bc66da	247	}
chris	0:9d0f47bc66da	248
chris	0:9d0f47bc66da	249	void usbdc::setEndpointStatus(unsigned char endpoint, unsigned char status)
chris	0:9d0f47bc66da	250	{
chris	0:9d0f47bc66da	251	/* SIE set endpoint status command */
chris	0:9d0f47bc66da	252	SIECommand(SIE_CMD_SET_ENDPOINT_STATUS(endpoint));
chris	0:9d0f47bc66da	253	SIEWriteData(status);
chris	0:9d0f47bc66da	254	}
chris	0:9d0f47bc66da	255
chris	0:9d0f47bc66da	256	void usbdc::realiseEndpoint(unsigned char endpoint, unsigned long maxPacket)
chris	0:9d0f47bc66da	257	{
chris	0:9d0f47bc66da	258	/* Realise an endpoint */
chris	0:9d0f47bc66da	259	LPC_USB->USBDevIntClr = EP_RLZED;
chris	0:9d0f47bc66da	260	LPC_USB->USBReEp \|= EP(endpoint);
chris	0:9d0f47bc66da	261	LPC_USB->USBEpInd = endpoint;
chris	0:9d0f47bc66da	262	LPC_USB->USBMaxPSize = maxPacket;
chris	0:9d0f47bc66da	263
chris	0:9d0f47bc66da	264	while (!(LPC_USB->USBDevIntSt & EP_RLZED));
chris	0:9d0f47bc66da	265	LPC_USB->USBDevIntClr = EP_RLZED;
chris	0:9d0f47bc66da	266
chris	0:9d0f47bc66da	267	/* Clear stall state */
chris	0:9d0f47bc66da	268	endpointStallState &= ~EP(endpoint);
chris	0:9d0f47bc66da	269	}
chris	0:9d0f47bc66da	270
chris	0:9d0f47bc66da	271	void usbdc::enableEndpointEvent(unsigned char endpoint)
chris	0:9d0f47bc66da	272	{
chris	0:9d0f47bc66da	273	/* Enable an endpoint interrupt */
chris	0:9d0f47bc66da	274	LPC_USB->USBEpIntEn \|= EP(endpoint);
chris	0:9d0f47bc66da	275	}
chris	0:9d0f47bc66da	276
chris	0:9d0f47bc66da	277	void usbdc::disableEndpointEvent(unsigned char endpoint)
chris	0:9d0f47bc66da	278	{
chris	0:9d0f47bc66da	279	/* Disable an endpoint interrupt */
chris	0:9d0f47bc66da	280	LPC_USB->USBEpIntEn &= ~EP(endpoint);
chris	0:9d0f47bc66da	281	}
chris	0:9d0f47bc66da	282
chris	0:9d0f47bc66da	283	void usbdc::stallEndpoint(unsigned char endpoint)
chris	0:9d0f47bc66da	284	{
chris	0:9d0f47bc66da	285	/* Stall an endpoint */
chris	0:9d0f47bc66da	286	if ( (endpoint==EP0IN) \|\| (endpoint==EP0OUT) )
chris	0:9d0f47bc66da	287	{
chris	0:9d0f47bc66da	288	/* Conditionally stall both control endpoints */
chris	0:9d0f47bc66da	289	setEndpointStatus(EP0OUT, SIE_SES_CND_ST);
chris	0:9d0f47bc66da	290	}
chris	0:9d0f47bc66da	291	else
chris	0:9d0f47bc66da	292	{
chris	0:9d0f47bc66da	293	setEndpointStatus(endpoint, SIE_SES_ST);
chris	0:9d0f47bc66da	294
chris	0:9d0f47bc66da	295	/* Update stall state */
chris	0:9d0f47bc66da	296	endpointStallState \|= EP(endpoint);
chris	0:9d0f47bc66da	297	}
chris	0:9d0f47bc66da	298	}
chris	0:9d0f47bc66da	299
chris	0:9d0f47bc66da	300	void usbdc::unstallEndpoint(unsigned char endpoint)
chris	0:9d0f47bc66da	301	{
chris	0:9d0f47bc66da	302	/* Unstall an endpoint. The endpoint will also be reinitialised */
chris	0:9d0f47bc66da	303	setEndpointStatus(endpoint, 0);
chris	0:9d0f47bc66da	304
chris	0:9d0f47bc66da	305	/* Update stall state */
chris	0:9d0f47bc66da	306	endpointStallState &= ~EP(endpoint);
chris	0:9d0f47bc66da	307	}
chris	0:9d0f47bc66da	308
chris	0:9d0f47bc66da	309	bool usbdc::getEndpointStallState(unsigned char endpoint)
chris	0:9d0f47bc66da	310	{
chris	0:9d0f47bc66da	311	/* Returns true if endpoint stalled */
chris	0:9d0f47bc66da	312	return endpointStallState & EP(endpoint);
chris	0:9d0f47bc66da	313	}
chris	0:9d0f47bc66da	314
chris	0:9d0f47bc66da	315	void usbdc::configureDevice(void)
chris	0:9d0f47bc66da	316	{
chris	0:9d0f47bc66da	317	/* SIE Configure device command */
chris	0:9d0f47bc66da	318	SIECommand(SIE_CMD_CONFIGURE_DEVICE);
chris	0:9d0f47bc66da	319	SIEWriteData(SIE_CONF_DEVICE);
chris	0:9d0f47bc66da	320	}
chris	0:9d0f47bc66da	321
chris	0:9d0f47bc66da	322	void usbdc::unconfigureDevice(void)
chris	0:9d0f47bc66da	323	{
chris	0:9d0f47bc66da	324	/* SIE Configure device command */
chris	0:9d0f47bc66da	325	SIECommand(SIE_CMD_CONFIGURE_DEVICE);
chris	0:9d0f47bc66da	326	SIEWriteData(0);
chris	0:9d0f47bc66da	327	}
chris	0:9d0f47bc66da	328
chris	0:9d0f47bc66da	329	unsigned long usbdc::endpointRead(unsigned char endpoint, unsigned char *buffer)
chris	0:9d0f47bc66da	330	{
chris	0:9d0f47bc66da	331	/* Read from an OUT endpoint */
chris	0:9d0f47bc66da	332	unsigned long size;
chris	0:9d0f47bc66da	333	unsigned long i;
chris	0:9d0f47bc66da	334	unsigned long data;
chris	0:9d0f47bc66da	335	unsigned char offset;
chris	0:9d0f47bc66da	336
chris	0:9d0f47bc66da	337	LPC_USB->USBCtrl = LOG_ENDPOINT(endpoint) \| RD_EN;
chris	0:9d0f47bc66da	338	while (!(LPC_USB->USBRxPLen & PKT_RDY));
chris	0:9d0f47bc66da	339
chris	0:9d0f47bc66da	340	size = LPC_USB->USBRxPLen & PKT_LNGTH_MASK;
chris	0:9d0f47bc66da	341
chris	0:9d0f47bc66da	342	offset = 0;
chris	0:9d0f47bc66da	343
chris	0:9d0f47bc66da	344	for (i=0; i<size; i++)
chris	0:9d0f47bc66da	345	{
chris	0:9d0f47bc66da	346	if (offset==0)
chris	0:9d0f47bc66da	347	{
chris	0:9d0f47bc66da	348	/* Fetch up to four bytes of data as a word */
chris	0:9d0f47bc66da	349	data = LPC_USB->USBRxData;
chris	0:9d0f47bc66da	350	}
chris	0:9d0f47bc66da	351
chris	0:9d0f47bc66da	352	/* extract a byte */
chris	0:9d0f47bc66da	353	*buffer++ = data>>offset;
chris	0:9d0f47bc66da	354
chris	0:9d0f47bc66da	355	/* move on to the next byte */
chris	0:9d0f47bc66da	356	offset = (offset + 8) % 32;
chris	0:9d0f47bc66da	357	}
chris	0:9d0f47bc66da	358
chris	0:9d0f47bc66da	359	/* Clear RD_EN to cover zero length packet case */
chris	0:9d0f47bc66da	360	LPC_USB->USBCtrl=0;
chris	0:9d0f47bc66da	361
chris	0:9d0f47bc66da	362	selectEndpoint(endpoint);
chris	0:9d0f47bc66da	363	clearBuffer();
chris	0:9d0f47bc66da	364
chris	0:9d0f47bc66da	365	return size;
chris	0:9d0f47bc66da	366	}
chris	0:9d0f47bc66da	367
chris	0:9d0f47bc66da	368	void usbdc::endpointWrite(unsigned char endpoint, unsigned char *buffer, unsigned long size)
chris	0:9d0f47bc66da	369	{
chris	0:9d0f47bc66da	370	/* Write to an IN endpoint */
chris	0:9d0f47bc66da	371	unsigned long temp, data;
chris	0:9d0f47bc66da	372	unsigned char offset;
chris	0:9d0f47bc66da	373
chris	0:9d0f47bc66da	374	LPC_USB->USBCtrl = LOG_ENDPOINT(endpoint) \| WR_EN;
chris	0:9d0f47bc66da	375
chris	0:9d0f47bc66da	376	LPC_USB->USBTxPLen = size;
chris	0:9d0f47bc66da	377	offset = 0;
chris	0:9d0f47bc66da	378	data = 0;
chris	0:9d0f47bc66da	379
chris	0:9d0f47bc66da	380	if (size>0)
chris	0:9d0f47bc66da	381	{
chris	0:9d0f47bc66da	382	do {
chris	0:9d0f47bc66da	383	/* Fetch next data byte into a word-sized temporary variable */
chris	0:9d0f47bc66da	384	temp = *buffer++;
chris	0:9d0f47bc66da	385
chris	0:9d0f47bc66da	386	/* Add to current data word */
chris	0:9d0f47bc66da	387	temp = temp << offset;
chris	0:9d0f47bc66da	388	data = data \| temp;
chris	0:9d0f47bc66da	389
chris	0:9d0f47bc66da	390	/* move on to the next byte */
chris	0:9d0f47bc66da	391	offset = (offset + 8) % 32;
chris	0:9d0f47bc66da	392	size--;
chris	0:9d0f47bc66da	393
chris	0:9d0f47bc66da	394	if ((offset==0) \|\| (size==0))
chris	0:9d0f47bc66da	395	{
chris	0:9d0f47bc66da	396	/* Write the word to the endpoint */
chris	0:9d0f47bc66da	397	LPC_USB->USBTxData = data;
chris	0:9d0f47bc66da	398	data = 0;
chris	0:9d0f47bc66da	399	}
chris	0:9d0f47bc66da	400	} while (size>0);
chris	0:9d0f47bc66da	401	}
chris	0:9d0f47bc66da	402
chris	0:9d0f47bc66da	403	/* Clear WR_EN to cover zero length packet case */
chris	0:9d0f47bc66da	404	LPC_USB->USBCtrl=0;
chris	0:9d0f47bc66da	405
chris	0:9d0f47bc66da	406	selectEndpoint(endpoint);
chris	0:9d0f47bc66da	407	validateBuffer();
chris	0:9d0f47bc66da	408	}
chris	0:9d0f47bc66da	409
chris	0:9d0f47bc66da	410	void usbdc::enableEvents(void)
chris	0:9d0f47bc66da	411	{
chris	0:9d0f47bc66da	412	/* Enable interrupt sources */
chris	0:9d0f47bc66da	413	LPC_USB->USBDevIntEn = EP_SLOW \| DEV_STAT;
chris	0:9d0f47bc66da	414	}
chris	0:9d0f47bc66da	415
chris	0:9d0f47bc66da	416	void usbdc::disableEvents(void)
chris	0:9d0f47bc66da	417	{
chris	0:9d0f47bc66da	418	/* Disable interrupt sources */
chris	0:9d0f47bc66da	419	LPC_USB->USBDevIntClr = EP_SLOW \| DEV_STAT;
chris	0:9d0f47bc66da	420	}
chris	0:9d0f47bc66da	421
chris	0:9d0f47bc66da	422	void usbdc::usbisr(void)
chris	0:9d0f47bc66da	423	{
chris	0:9d0f47bc66da	424	unsigned char devStat;
chris	0:9d0f47bc66da	425
chris	0:9d0f47bc66da	426	if (LPC_USB->USBDevIntSt & FRAME)
chris	0:9d0f47bc66da	427	{
chris	0:9d0f47bc66da	428	/* Frame event */
chris	0:9d0f47bc66da	429	deviceEventFrame();
chris	0:9d0f47bc66da	430	/* Clear interrupt status flag */
chris	0:9d0f47bc66da	431	LPC_USB->USBDevIntClr = FRAME;
chris	0:9d0f47bc66da	432	}
chris	0:9d0f47bc66da	433
chris	0:9d0f47bc66da	434	if (LPC_USB->USBDevIntSt & DEV_STAT)
chris	0:9d0f47bc66da	435	{
chris	0:9d0f47bc66da	436	/* Device Status interrupt */
chris	0:9d0f47bc66da	437	/* Must clear the interrupt status flag before reading the device status from the SIE */
chris	0:9d0f47bc66da	438	LPC_USB->USBDevIntClr = DEV_STAT;
chris	0:9d0f47bc66da	439
chris	0:9d0f47bc66da	440	/* Read device status from SIE */
chris	0:9d0f47bc66da	441	devStat = getDeviceStatus();
chris	0:9d0f47bc66da	442
chris	0:9d0f47bc66da	443	if (devStat & SIE_DS_RST)
chris	0:9d0f47bc66da	444	{
chris	0:9d0f47bc66da	445	/* Bus reset */
chris	0:9d0f47bc66da	446	deviceEventReset();
chris	0:9d0f47bc66da	447	}
chris	0:9d0f47bc66da	448	}
chris	0:9d0f47bc66da	449
chris	0:9d0f47bc66da	450	if (LPC_USB->USBDevIntSt & EP_SLOW)
chris	0:9d0f47bc66da	451	{
chris	0:9d0f47bc66da	452	/* (Slow) Endpoint Interrupt */
chris	0:9d0f47bc66da	453
chris	0:9d0f47bc66da	454	/* Process each endpoint interrupt */
chris	0:9d0f47bc66da	455	if (LPC_USB->USBEpIntSt & EP(EP0OUT))
chris	0:9d0f47bc66da	456	{
chris	0:9d0f47bc66da	457	if (selectEndpointClearInterrupt(EP0OUT) & SIE_SE_STP)
chris	0:9d0f47bc66da	458	{
chris	0:9d0f47bc66da	459	/* this is a setup packet */
chris	0:9d0f47bc66da	460	endpointEventEP0Setup();
chris	0:9d0f47bc66da	461	}
chris	0:9d0f47bc66da	462	else
chris	0:9d0f47bc66da	463	{
chris	0:9d0f47bc66da	464	endpointEventEP0Out();
chris	0:9d0f47bc66da	465	}
chris	0:9d0f47bc66da	466	}
chris	0:9d0f47bc66da	467
chris	0:9d0f47bc66da	468	if (LPC_USB->USBEpIntSt & EP(EP0IN))
chris	0:9d0f47bc66da	469	{
chris	0:9d0f47bc66da	470	selectEndpointClearInterrupt(EP0IN);
chris	0:9d0f47bc66da	471	endpointEventEP0In();
chris	0:9d0f47bc66da	472	}
chris	0:9d0f47bc66da	473
chris	0:9d0f47bc66da	474	if (LPC_USB->USBEpIntSt & EP(EP1OUT))
chris	0:9d0f47bc66da	475	{
chris	0:9d0f47bc66da	476	selectEndpointClearInterrupt(EP1OUT);
chris	0:9d0f47bc66da	477	endpointEventEP1Out();
chris	0:9d0f47bc66da	478	}
chris	0:9d0f47bc66da	479
chris	0:9d0f47bc66da	480	if (LPC_USB->USBEpIntSt & EP(EP1IN))
chris	0:9d0f47bc66da	481	{
chris	0:9d0f47bc66da	482	selectEndpointClearInterrupt(EP1IN);
chris	0:9d0f47bc66da	483	endpointEventEP1In();
chris	0:9d0f47bc66da	484	}
chris	0:9d0f47bc66da	485
chris	0:9d0f47bc66da	486	if (LPC_USB->USBEpIntSt & EP(EP2OUT))
chris	0:9d0f47bc66da	487	{
chris	0:9d0f47bc66da	488	selectEndpointClearInterrupt(EP2OUT);
chris	0:9d0f47bc66da	489	endpointEventEP2Out();
chris	0:9d0f47bc66da	490	}
chris	0:9d0f47bc66da	491
chris	0:9d0f47bc66da	492	if (LPC_USB->USBEpIntSt & EP(EP2IN))
chris	0:9d0f47bc66da	493	{
chris	0:9d0f47bc66da	494	selectEndpointClearInterrupt(EP2IN);
chris	0:9d0f47bc66da	495	endpointEventEP2In();
chris	0:9d0f47bc66da	496	}
chris	0:9d0f47bc66da	497
chris	0:9d0f47bc66da	498	/* Clear interrupt status flag */
chris	0:9d0f47bc66da	499	/* EP_SLOW and EP_FAST interrupt bits should be cleared after the corresponding endpoint interrupts are cleared. */
chris	0:9d0f47bc66da	500	LPC_USB->USBDevIntClr = EP_SLOW;
chris	0:9d0f47bc66da	501	}
chris	0:9d0f47bc66da	502	}
chris	0:9d0f47bc66da	503
chris	0:9d0f47bc66da	504
chris	0:9d0f47bc66da	505	void usbdc::_usbisr(void)
chris	0:9d0f47bc66da	506	{
chris	0:9d0f47bc66da	507	instance->usbisr();
chris	0:9d0f47bc66da	508	}
chris	0:9d0f47bc66da	509
chris	0:9d0f47bc66da	510	void usbdc::deviceEventReset(void)
chris	0:9d0f47bc66da	511	{
chris	0:9d0f47bc66da	512	}
chris	0:9d0f47bc66da	513
chris	0:9d0f47bc66da	514	void usbdc::deviceEventFrame(void)
chris	0:9d0f47bc66da	515	{
chris	0:9d0f47bc66da	516	}
chris	0:9d0f47bc66da	517
chris	0:9d0f47bc66da	518	void usbdc::endpointEventEP0Setup(void)
chris	0:9d0f47bc66da	519	{
chris	0:9d0f47bc66da	520	}
chris	0:9d0f47bc66da	521
chris	0:9d0f47bc66da	522	void usbdc::endpointEventEP0In(void)
chris	0:9d0f47bc66da	523	{
chris	0:9d0f47bc66da	524	}
chris	0:9d0f47bc66da	525
chris	0:9d0f47bc66da	526	void usbdc::endpointEventEP0Out(void)
chris	0:9d0f47bc66da	527	{
chris	0:9d0f47bc66da	528	}
chris	0:9d0f47bc66da	529
chris	0:9d0f47bc66da	530	void usbdc::endpointEventEP1In(void)
chris	0:9d0f47bc66da	531	{
chris	0:9d0f47bc66da	532	}
chris	0:9d0f47bc66da	533
chris	0:9d0f47bc66da	534	void usbdc::endpointEventEP1Out(void)
chris	0:9d0f47bc66da	535	{
chris	0:9d0f47bc66da	536	}
chris	0:9d0f47bc66da	537
chris	0:9d0f47bc66da	538	void usbdc::endpointEventEP2In(void)
chris	0:9d0f47bc66da	539	{
chris	0:9d0f47bc66da	540	}
chris	0:9d0f47bc66da	541
chris	0:9d0f47bc66da	542	void usbdc::endpointEventEP2Out(void)
chris	0:9d0f47bc66da	543	{
chris	0:9d0f47bc66da	544	}

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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/usbdc.cpp@0:9d0f47bc66da, 2011-05-12 (annotated)

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