| 1 |
577 |
jeremybenn |
/*
|
| 2 |
|
|
FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
|
| 3 |
|
|
|
| 4 |
|
|
***************************************************************************
|
| 5 |
|
|
* *
|
| 6 |
|
|
* If you are: *
|
| 7 |
|
|
* *
|
| 8 |
|
|
* + New to FreeRTOS, *
|
| 9 |
|
|
* + Wanting to learn FreeRTOS or multitasking in general quickly *
|
| 10 |
|
|
* + Looking for basic training, *
|
| 11 |
|
|
* + Wanting to improve your FreeRTOS skills and productivity *
|
| 12 |
|
|
* *
|
| 13 |
|
|
* then take a look at the FreeRTOS books - available as PDF or paperback *
|
| 14 |
|
|
* *
|
| 15 |
|
|
* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
|
| 16 |
|
|
* http://www.FreeRTOS.org/Documentation *
|
| 17 |
|
|
* *
|
| 18 |
|
|
* A pdf reference manual is also available. Both are usually delivered *
|
| 19 |
|
|
* to your inbox within 20 minutes to two hours when purchased between 8am *
|
| 20 |
|
|
* and 8pm GMT (although please allow up to 24 hours in case of *
|
| 21 |
|
|
* exceptional circumstances). Thank you for your support! *
|
| 22 |
|
|
* *
|
| 23 |
|
|
***************************************************************************
|
| 24 |
|
|
|
| 25 |
|
|
This file is part of the FreeRTOS distribution.
|
| 26 |
|
|
|
| 27 |
|
|
FreeRTOS is free software; you can redistribute it and/or modify it under
|
| 28 |
|
|
the terms of the GNU General Public License (version 2) as published by the
|
| 29 |
|
|
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
|
| 30 |
|
|
***NOTE*** The exception to the GPL is included to allow you to distribute
|
| 31 |
|
|
a combined work that includes FreeRTOS without being obliged to provide the
|
| 32 |
|
|
source code for proprietary components outside of the FreeRTOS kernel.
|
| 33 |
|
|
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
|
| 34 |
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 35 |
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
| 36 |
|
|
more details. You should have received a copy of the GNU General Public
|
| 37 |
|
|
License and the FreeRTOS license exception along with FreeRTOS; if not it
|
| 38 |
|
|
can be viewed here: http://www.freertos.org/a00114.html and also obtained
|
| 39 |
|
|
by writing to Richard Barry, contact details for whom are available on the
|
| 40 |
|
|
FreeRTOS WEB site.
|
| 41 |
|
|
|
| 42 |
|
|
1 tab == 4 spaces!
|
| 43 |
|
|
|
| 44 |
|
|
http://www.FreeRTOS.org - Documentation, latest information, license and
|
| 45 |
|
|
contact details.
|
| 46 |
|
|
|
| 47 |
|
|
http://www.SafeRTOS.com - A version that is certified for use in safety
|
| 48 |
|
|
critical systems.
|
| 49 |
|
|
|
| 50 |
|
|
http://www.OpenRTOS.com - Commercial support, development, porting,
|
| 51 |
|
|
licensing and training services.
|
| 52 |
|
|
*/
|
| 53 |
|
|
|
| 54 |
|
|
/*
|
| 55 |
|
|
Sample interrupt driven mouse device driver. This is a minimal implementation
|
| 56 |
|
|
for demonstration only. Although functional, it may not be a fully and
|
| 57 |
|
|
compliant implementation. The small joystick on the SAM7X EK can be used to
|
| 58 |
|
|
move the mouse cursor, pressing the joystick transmits mouse clicks. Note
|
| 59 |
|
|
that it might be necessary to run the demo stand along (without the
|
| 60 |
|
|
debugger) in order for the USB device to be recognised by the host computer.
|
| 61 |
|
|
|
| 62 |
|
|
The interrupt handler itself is contained within USB_ISR.c.
|
| 63 |
|
|
|
| 64 |
|
|
See the FreeRTOS.org online documentation for more information.
|
| 65 |
|
|
*/
|
| 66 |
|
|
|
| 67 |
|
|
/* Standard includes. */
|
| 68 |
|
|
#include <string.h>
|
| 69 |
|
|
|
| 70 |
|
|
/* Scheduler includes. */
|
| 71 |
|
|
#include "FreeRTOS.h"
|
| 72 |
|
|
#include "task.h"
|
| 73 |
|
|
#include "queue.h"
|
| 74 |
|
|
|
| 75 |
|
|
/* Demo application includes. */
|
| 76 |
|
|
#include "USBSample.h"
|
| 77 |
|
|
|
| 78 |
|
|
/* Joystick inputs used to move the 'mouse' cursor. */
|
| 79 |
|
|
#define usbSW1 ( 1 << 21 ) /* PA21 */
|
| 80 |
|
|
#define usbSW2 ( 1 << 22 ) /* PA22 */
|
| 81 |
|
|
#define usbSW3 ( 1 << 23 ) /* PA23 */
|
| 82 |
|
|
#define usbSW4 ( 1 << 24 ) /* PA24 */
|
| 83 |
|
|
#define usbSW_CLICK ( 1 << 25 ) /* PA25 */
|
| 84 |
|
|
|
| 85 |
|
|
/* Descriptor type definitions. */
|
| 86 |
|
|
#define usbDESCRIPTOR_TYPE_DEVICE ( 0x01 )
|
| 87 |
|
|
#define usbDESCRIPTOR_TYPE_CONFIGURATION ( 0x02 )
|
| 88 |
|
|
#define usbDESCRIPTOR_TYPE_STRING ( 0x03 )
|
| 89 |
|
|
|
| 90 |
|
|
/* USB request type definitions. */
|
| 91 |
|
|
#define usbGET_REPORT_REQUEST ( 0x01 )
|
| 92 |
|
|
#define usbGET_IDLE_REQUEST ( 0x02 )
|
| 93 |
|
|
#define usbGET_PROTOCOL_REQUEST ( 0x03 )
|
| 94 |
|
|
#define usbSET_REPORT_REQUEST ( 0x09 )
|
| 95 |
|
|
#define usbSET_IDLE_REQUEST ( 0x0A )
|
| 96 |
|
|
#define usbSET_PROTOCOL_REQUEST ( 0x0B )
|
| 97 |
|
|
#define usbGET_CONFIGURATION_REQUEST ( 0x08 )
|
| 98 |
|
|
#define usbGET_STATUS_REQUEST ( 0x00 )
|
| 99 |
|
|
#define usbCLEAR_FEATURE_REQUEST ( 0x01 )
|
| 100 |
|
|
#define usbSET_FEATURE_REQUEST ( 0x03 )
|
| 101 |
|
|
#define usbSET_ADDRESS_REQUEST ( 0x05 )
|
| 102 |
|
|
#define usbGET_DESCRIPTOR_REQUEST ( 0x06 )
|
| 103 |
|
|
#define usbSET_CONFIGURATION_REQUEST ( 0x09 )
|
| 104 |
|
|
#define usbGET_INTERFACE_REQUEST ( 0x0A )
|
| 105 |
|
|
#define usbSET_INTERFACE_REQUEST ( 0x0B )
|
| 106 |
|
|
|
| 107 |
|
|
|
| 108 |
|
|
/* Misc USB definitions. */
|
| 109 |
|
|
#define usbDEVICE_CLASS_VENDOR_SPECIFIC ( 0xFF )
|
| 110 |
|
|
#define usbBUS_POWERED ( 0x80 )
|
| 111 |
|
|
#define usbHID_REPORT_DESCRIPTOR ( 0x22 )
|
| 112 |
|
|
#define AT91C_UDP_TRANSCEIVER_ENABLE ( *( ( unsigned long * ) 0xfffb0074 ) )
|
| 113 |
|
|
|
| 114 |
|
|
/* Index to the various string. */
|
| 115 |
|
|
#define usbLANGUAGE_STRING ( 0 )
|
| 116 |
|
|
#define usbMANUFACTURER_STRING ( 1 )
|
| 117 |
|
|
#define usbPRODUCT_STRING ( 2 )
|
| 118 |
|
|
#define usbCONFIGURATION_STRING ( 3 )
|
| 119 |
|
|
#define usbINTERFACE_STRING ( 4 )
|
| 120 |
|
|
|
| 121 |
|
|
/* Data indexes for reading the request from the xISRStatus.ucFifoData[]
|
| 122 |
|
|
into xUSB_REQUEST. The data order is designed for speed - so looks a
|
| 123 |
|
|
little odd. */
|
| 124 |
|
|
#define usbREQUEST_TYPE_INDEX ( 7 )
|
| 125 |
|
|
#define usbREQUEST_INDEX ( 6 )
|
| 126 |
|
|
#define usbVALUE_HIGH_BYTE ( 4 )
|
| 127 |
|
|
#define usbVALUE_LOW_BYTE ( 5 )
|
| 128 |
|
|
#define usbINDEX_HIGH_BYTE ( 2 )
|
| 129 |
|
|
#define usbINDEX_LOW_BYTE ( 3 )
|
| 130 |
|
|
#define usbLENGTH_HIGH_BYTE ( 0 )
|
| 131 |
|
|
#define usbLENGTH_LOW_BYTE ( 1 )
|
| 132 |
|
|
|
| 133 |
|
|
/* Misc application definitions. */
|
| 134 |
|
|
#define usbINTERRUPT_PRIORITY ( 3 )
|
| 135 |
|
|
#define usbFIFO_LENGTH ( ( unsigned long ) 8 )
|
| 136 |
|
|
#define usbXUP ( 1 )
|
| 137 |
|
|
#define usbXDOWN ( 2 )
|
| 138 |
|
|
#define usbYUP ( 3 )
|
| 139 |
|
|
#define usbYDOWN ( 4 )
|
| 140 |
|
|
#define usbMAX_COORD ( 120 )
|
| 141 |
|
|
#define usbMAX_TX_MESSAGE_SIZE ( 128 )
|
| 142 |
|
|
#define usbSHORTEST_DELAY ( ( portTickType ) 1 )
|
| 143 |
|
|
#define usbINIT_DELAY ( ( portTickType ) 1000 / portTICK_RATE_MS )
|
| 144 |
|
|
#define usbSHORT_DELAY ( ( portTickType ) 50 / portTICK_RATE_MS )
|
| 145 |
|
|
#define usbEND_POINT_RESET_MASK ( ( unsigned long ) 0x0f )
|
| 146 |
|
|
#define usbDATA_INC ( ( char ) 5 )
|
| 147 |
|
|
#define usbEXPECTED_NUMBER_OF_BYTES ( ( unsigned long ) 8 )
|
| 148 |
|
|
|
| 149 |
|
|
/* Control request types. */
|
| 150 |
|
|
#define usbSTANDARD_DEVICE_REQUEST ( 0 )
|
| 151 |
|
|
#define usbSTANDARD_INTERFACE_REQUEST ( 1 )
|
| 152 |
|
|
#define usbSTANDARD_END_POINT_REQUEST ( 2 )
|
| 153 |
|
|
#define usbCLASS_INTERFACE_REQUEST ( 5 )
|
| 154 |
|
|
|
| 155 |
|
|
/* Structure used to hold the received requests. */
|
| 156 |
|
|
typedef struct
|
| 157 |
|
|
{
|
| 158 |
|
|
unsigned char ucReqType;
|
| 159 |
|
|
unsigned char ucRequest;
|
| 160 |
|
|
unsigned short usValue;
|
| 161 |
|
|
unsigned short usIndex;
|
| 162 |
|
|
unsigned short usLength;
|
| 163 |
|
|
} xUSB_REQUEST;
|
| 164 |
|
|
|
| 165 |
|
|
typedef enum
|
| 166 |
|
|
{
|
| 167 |
|
|
eNOTHING,
|
| 168 |
|
|
eJUST_RESET,
|
| 169 |
|
|
eJUST_GOT_CONFIG,
|
| 170 |
|
|
eJUST_GOT_ADDRESS,
|
| 171 |
|
|
eSENDING_EVEN_DESCRIPTOR,
|
| 172 |
|
|
eREADY_TO_SEND
|
| 173 |
|
|
} eDRIVER_STATE;
|
| 174 |
|
|
|
| 175 |
|
|
/* Structure used to control the data being sent to the host. */
|
| 176 |
|
|
typedef struct
|
| 177 |
|
|
{
|
| 178 |
|
|
unsigned char ucTxBuffer[ usbMAX_TX_MESSAGE_SIZE ];
|
| 179 |
|
|
unsigned long ulNextCharIndex;
|
| 180 |
|
|
unsigned long ulTotalDataLength;
|
| 181 |
|
|
} xTX_MESSAGE;
|
| 182 |
|
|
|
| 183 |
|
|
/*-----------------------------------------------------------*/
|
| 184 |
|
|
|
| 185 |
|
|
/*
|
| 186 |
|
|
* The USB interrupt service routine. This takes a snapshot of the USB
|
| 187 |
|
|
* device at the time of the interrupt, clears the interrupts, and posts
|
| 188 |
|
|
* the data to the USB processing task. This is implemented in USB_ISR.c.
|
| 189 |
|
|
*/
|
| 190 |
|
|
extern void vUSB_ISR_Wrapper( void );
|
| 191 |
|
|
|
| 192 |
|
|
/*
|
| 193 |
|
|
* Called after the bus reset interrupt - this function readies all the
|
| 194 |
|
|
* end points for communication.
|
| 195 |
|
|
*/
|
| 196 |
|
|
static void prvResetEndPoints( void );
|
| 197 |
|
|
|
| 198 |
|
|
/*
|
| 199 |
|
|
* Setup the USB hardware, install the interrupt service routine and
|
| 200 |
|
|
* initialise all the state variables.
|
| 201 |
|
|
*/
|
| 202 |
|
|
static void vInitUSBInterface( void );
|
| 203 |
|
|
|
| 204 |
|
|
/*
|
| 205 |
|
|
* Decode and act upon an interrupt generated by the control end point.
|
| 206 |
|
|
*/
|
| 207 |
|
|
static void prvProcessEndPoint0Interrupt( xISRStatus *pxMessage );
|
| 208 |
|
|
|
| 209 |
|
|
/*
|
| 210 |
|
|
* For simplicity requests are separated into device, interface, class
|
| 211 |
|
|
* interface and end point requests.
|
| 212 |
|
|
*
|
| 213 |
|
|
* Decode and handle standard device requests originating on the control
|
| 214 |
|
|
* end point.
|
| 215 |
|
|
*/
|
| 216 |
|
|
static void prvHandleStandardDeviceRequest( xUSB_REQUEST *pxRequest );
|
| 217 |
|
|
|
| 218 |
|
|
/*
|
| 219 |
|
|
* For simplicity requests are separated into device, interface, class
|
| 220 |
|
|
* interface and end point requests.
|
| 221 |
|
|
*
|
| 222 |
|
|
* Decode and handle standard interface requests originating on the control
|
| 223 |
|
|
* end point.
|
| 224 |
|
|
*/
|
| 225 |
|
|
static void prvHandleStandardInterfaceRequest( xUSB_REQUEST *pxRequest );
|
| 226 |
|
|
|
| 227 |
|
|
/*
|
| 228 |
|
|
* For simplicity requests are separated into device, interface, class
|
| 229 |
|
|
* interface and end point requests.
|
| 230 |
|
|
*
|
| 231 |
|
|
* Decode and handle standard end point requests originating on the control
|
| 232 |
|
|
* end point.
|
| 233 |
|
|
*/
|
| 234 |
|
|
static void prvHandleStandardEndPointRequest( xUSB_REQUEST *pxRequest );
|
| 235 |
|
|
|
| 236 |
|
|
/*
|
| 237 |
|
|
* For simplicity requests are separated into device, interface, class
|
| 238 |
|
|
* interface and end point requests.
|
| 239 |
|
|
*
|
| 240 |
|
|
* Decode and handle the class interface requests.
|
| 241 |
|
|
*/
|
| 242 |
|
|
static void prvHandleClassInterfaceRequest( xUSB_REQUEST *pxRequest );
|
| 243 |
|
|
|
| 244 |
|
|
/*
|
| 245 |
|
|
* Setup the Tx buffer to send data in response to a control request.
|
| 246 |
|
|
*
|
| 247 |
|
|
* The data to be transmitted is buffered, the state variables are updated,
|
| 248 |
|
|
* then prvSendNextSegment() is called to start the transmission off. Once
|
| 249 |
|
|
* the first segment has been sent the remaining segments are transmitted
|
| 250 |
|
|
* in response to TXCOMP interrupts until the entire buffer has been
|
| 251 |
|
|
* sent.
|
| 252 |
|
|
*/
|
| 253 |
|
|
static void prvSendControlData( unsigned char *pucData, unsigned short usRequestedLength, unsigned long ulLengthLeftToSend, long lSendingDescriptor );
|
| 254 |
|
|
|
| 255 |
|
|
/*
|
| 256 |
|
|
* Examine the Tx buffer to see if there is any more data to be transmitted.
|
| 257 |
|
|
*
|
| 258 |
|
|
* If there is data to be transmitted then send the next segment. A segment
|
| 259 |
|
|
* can have a maximum of 8 bytes (this is defined as the maximum for the end
|
| 260 |
|
|
* point by the descriptor). The final segment may be less than 8 bytes if
|
| 261 |
|
|
* the total data length was not an exact multiple of 8.
|
| 262 |
|
|
*/
|
| 263 |
|
|
static void prvSendNextSegment( void );
|
| 264 |
|
|
|
| 265 |
|
|
/*
|
| 266 |
|
|
* A stall condition is forced each time the host makes a request that is not
|
| 267 |
|
|
* supported by this minimal implementation.
|
| 268 |
|
|
*
|
| 269 |
|
|
* A stall is forced by setting the appropriate bit in the end points control
|
| 270 |
|
|
* and status register.
|
| 271 |
|
|
*/
|
| 272 |
|
|
static void prvSendStall( void );
|
| 273 |
|
|
|
| 274 |
|
|
/*
|
| 275 |
|
|
* A NULL (or zero length packet) is transmitted in acknowledge the reception
|
| 276 |
|
|
* of certain events from the host.
|
| 277 |
|
|
*/
|
| 278 |
|
|
static void prvUSBTransmitNull( void );
|
| 279 |
|
|
|
| 280 |
|
|
/*
|
| 281 |
|
|
* When the host requests a descriptor this function is called to determine
|
| 282 |
|
|
* which descriptor is being requested and start its transmission.
|
| 283 |
|
|
*/
|
| 284 |
|
|
static void prvGetStandardInterfaceDescriptor( xUSB_REQUEST *pxRequest );
|
| 285 |
|
|
|
| 286 |
|
|
/*
|
| 287 |
|
|
* Transmit movement and clicks on the EK joystick as mouse inputs.
|
| 288 |
|
|
*/
|
| 289 |
|
|
static void prvTransmitSampleValues( void );
|
| 290 |
|
|
|
| 291 |
|
|
/*
|
| 292 |
|
|
* The created task to handle the USB demo functionality.
|
| 293 |
|
|
*/
|
| 294 |
|
|
static void vUSBDemoTask( void *pvParameters );
|
| 295 |
|
|
|
| 296 |
|
|
/*
|
| 297 |
|
|
* Simple algorithm to ramp up the mouse cursor speed to make it easier to
|
| 298 |
|
|
* use.
|
| 299 |
|
|
*/
|
| 300 |
|
|
static void prvControlCursorSpeed( signed char *cVal, unsigned long ulInput, unsigned long ulSwitch1, unsigned long ulSwitch2 );
|
| 301 |
|
|
/*-----------------------------------------------------------*/
|
| 302 |
|
|
|
| 303 |
|
|
/*
|
| 304 |
|
|
- DESCRIPTOR DEFINITIONS -
|
| 305 |
|
|
*/
|
| 306 |
|
|
|
| 307 |
|
|
/* String descriptors used during the enumeration process.
|
| 308 |
|
|
These take the form:
|
| 309 |
|
|
|
| 310 |
|
|
{
|
| 311 |
|
|
Length of descriptor,
|
| 312 |
|
|
Descriptor type,
|
| 313 |
|
|
Data
|
| 314 |
|
|
}
|
| 315 |
|
|
*/
|
| 316 |
|
|
const char pxLanguageStringDescriptor[] =
|
| 317 |
|
|
{
|
| 318 |
|
|
4,
|
| 319 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 320 |
|
|
0x09, 0x04
|
| 321 |
|
|
};
|
| 322 |
|
|
|
| 323 |
|
|
const char pxManufacturerStringDescriptor[] =
|
| 324 |
|
|
{
|
| 325 |
|
|
18,
|
| 326 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 327 |
|
|
|
| 328 |
|
|
'F', 0x00,
|
| 329 |
|
|
'r', 0x00,
|
| 330 |
|
|
'e', 0x00,
|
| 331 |
|
|
'e', 0x00,
|
| 332 |
|
|
'R', 0x00,
|
| 333 |
|
|
'T', 0x00,
|
| 334 |
|
|
'O', 0x00,
|
| 335 |
|
|
'S', 0x00
|
| 336 |
|
|
};
|
| 337 |
|
|
|
| 338 |
|
|
const char pxProductStringDescriptor[] =
|
| 339 |
|
|
{
|
| 340 |
|
|
38,
|
| 341 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 342 |
|
|
|
| 343 |
|
|
'F', 0x00,
|
| 344 |
|
|
'r', 0x00,
|
| 345 |
|
|
'e', 0x00,
|
| 346 |
|
|
'e', 0x00,
|
| 347 |
|
|
'R', 0x00,
|
| 348 |
|
|
'T', 0x00,
|
| 349 |
|
|
'O', 0x00,
|
| 350 |
|
|
'S', 0x00,
|
| 351 |
|
|
'.', 0x00,
|
| 352 |
|
|
'o', 0x00,
|
| 353 |
|
|
'r', 0x00,
|
| 354 |
|
|
'g', 0x00,
|
| 355 |
|
|
' ', 0x00,
|
| 356 |
|
|
'M', 0x00,
|
| 357 |
|
|
'o', 0x00,
|
| 358 |
|
|
'u', 0x00,
|
| 359 |
|
|
's', 0x00,
|
| 360 |
|
|
'e', 0x00
|
| 361 |
|
|
};
|
| 362 |
|
|
|
| 363 |
|
|
const char pxConfigurationStringDescriptor[] =
|
| 364 |
|
|
{
|
| 365 |
|
|
38,
|
| 366 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 367 |
|
|
|
| 368 |
|
|
'C', 0x00,
|
| 369 |
|
|
'o', 0x00,
|
| 370 |
|
|
'n', 0x00,
|
| 371 |
|
|
'f', 0x00,
|
| 372 |
|
|
'i', 0x00,
|
| 373 |
|
|
'g', 0x00,
|
| 374 |
|
|
'u', 0x00,
|
| 375 |
|
|
'r', 0x00,
|
| 376 |
|
|
'a', 0x00,
|
| 377 |
|
|
't', 0x00,
|
| 378 |
|
|
'i', 0x00,
|
| 379 |
|
|
'o', 0x00,
|
| 380 |
|
|
'n', 0x00,
|
| 381 |
|
|
' ', 0x00,
|
| 382 |
|
|
'N', 0x00,
|
| 383 |
|
|
'a', 0x00,
|
| 384 |
|
|
'm', 0x00,
|
| 385 |
|
|
'e', 0x00
|
| 386 |
|
|
};
|
| 387 |
|
|
|
| 388 |
|
|
const char pxInterfaceStringDescriptor[] =
|
| 389 |
|
|
{
|
| 390 |
|
|
30,
|
| 391 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 392 |
|
|
|
| 393 |
|
|
'I', 0x00,
|
| 394 |
|
|
'n', 0x00,
|
| 395 |
|
|
't', 0x00,
|
| 396 |
|
|
'e', 0x00,
|
| 397 |
|
|
'r', 0x00,
|
| 398 |
|
|
'f', 0x00,
|
| 399 |
|
|
'a', 0x00,
|
| 400 |
|
|
'c', 0x00,
|
| 401 |
|
|
'e', 0x00,
|
| 402 |
|
|
' ', 0x00,
|
| 403 |
|
|
'N', 0x00,
|
| 404 |
|
|
'a', 0x00,
|
| 405 |
|
|
'm', 0x00,
|
| 406 |
|
|
'e', 0x00
|
| 407 |
|
|
};
|
| 408 |
|
|
|
| 409 |
|
|
/* Enumeration descriptors. */
|
| 410 |
|
|
const char pxReportDescriptor[] =
|
| 411 |
|
|
{
|
| 412 |
|
|
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
|
| 413 |
|
|
0x09, 0x02, /* USAGE (Mouse) */
|
| 414 |
|
|
0xa1, 0x01, /* COLLECTION (Application) */
|
| 415 |
|
|
0x09, 0x01, /* USAGE (Pointer) */
|
| 416 |
|
|
0xa1, 0x00, /* COLLECTION (Physical) */
|
| 417 |
|
|
0x95, 0x03, /* REPORT_COUNT (3) */
|
| 418 |
|
|
0x75, 0x01, /* REPORT_SIZE (1) */
|
| 419 |
|
|
0x05, 0x09, /* USAGE_PAGE (Button) */
|
| 420 |
|
|
0x19, 0x01, /* USAGE_MINIMUM (Button 1) */
|
| 421 |
|
|
0x29, 0x03, /* USAGE_MAXIMUM (Button 3) */
|
| 422 |
|
|
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
|
| 423 |
|
|
0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
|
| 424 |
|
|
0x81, 0x02, /* INPUT (Data,Var,Abs) */
|
| 425 |
|
|
0x95, 0x01, /* REPORT_COUNT (1) */
|
| 426 |
|
|
0x75, 0x05, /* REPORT_SIZE (5) */
|
| 427 |
|
|
0x81, 0x01, /* INPUT (Cnst,Ary,Abs) */
|
| 428 |
|
|
0x75, 0x08, /* REPORT_SIZE (8) */
|
| 429 |
|
|
0x95, 0x02, /* REPORT_COUNT (2) */
|
| 430 |
|
|
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
|
| 431 |
|
|
0x09, 0x30, /* USAGE (X) */
|
| 432 |
|
|
0x09, 0x31, /* USAGE (Y) */
|
| 433 |
|
|
0x15, 0x81, /* LOGICAL_MINIMUM (-127) */
|
| 434 |
|
|
0x25, 0x7f, /* LOGICAL_MAXIMUM (127) */
|
| 435 |
|
|
0x81, 0x06, /* INPUT (Data,Var,Rel) */
|
| 436 |
|
|
0xc0, /* END_COLLECTION */
|
| 437 |
|
|
0xc0 /* END_COLLECTION */
|
| 438 |
|
|
};
|
| 439 |
|
|
|
| 440 |
|
|
|
| 441 |
|
|
|
| 442 |
|
|
const char pxDeviceDescriptor[] =
|
| 443 |
|
|
{
|
| 444 |
|
|
/* Device descriptor */
|
| 445 |
|
|
0x12, /* bLength */
|
| 446 |
|
|
0x01, /* bDescriptorType */
|
| 447 |
|
|
0x10, 0x01, /* bcdUSBL */
|
| 448 |
|
|
usbDEVICE_CLASS_VENDOR_SPECIFIC, /* bDeviceClass: */
|
| 449 |
|
|
0x00, /* bDeviceSubclass: */
|
| 450 |
|
|
0x00, /* bDeviceProtocol: */
|
| 451 |
|
|
0x08, /* bMaxPacketSize0 */
|
| 452 |
|
|
0xFF, 0xFF, /* idVendorL */
|
| 453 |
|
|
0x02, 0x00, /* idProductL */
|
| 454 |
|
|
0x00, 0x01, /* bcdDeviceL */
|
| 455 |
|
|
usbMANUFACTURER_STRING, /* iManufacturer */
|
| 456 |
|
|
usbPRODUCT_STRING, /* iProduct */
|
| 457 |
|
|
0x00, /* SerialNumber */
|
| 458 |
|
|
0x01 /* bNumConfigs */
|
| 459 |
|
|
};
|
| 460 |
|
|
|
| 461 |
|
|
|
| 462 |
|
|
const char pxConfigDescriptor[] = {
|
| 463 |
|
|
/* Configuration 1 descriptor */
|
| 464 |
|
|
0x09, /* CbLength */
|
| 465 |
|
|
0x02, /* CbDescriptorType */
|
| 466 |
|
|
0x22, 0x00, /* CwTotalLength 2 EP + Control */
|
| 467 |
|
|
0x01, /* CbNumInterfaces */
|
| 468 |
|
|
0x01, /* CbConfigurationValue */
|
| 469 |
|
|
usbCONFIGURATION_STRING,/* CiConfiguration */
|
| 470 |
|
|
usbBUS_POWERED, /* CbmAttributes Bus powered + Remote Wakeup*/
|
| 471 |
|
|
0x32, /* CMaxPower: 100mA */
|
| 472 |
|
|
|
| 473 |
|
|
/* Mouse Interface Descriptor Requirement */
|
| 474 |
|
|
0x09, /* bLength */
|
| 475 |
|
|
0x04, /* bDescriptorType */
|
| 476 |
|
|
0x00, /* bInterfaceNumber */
|
| 477 |
|
|
0x00, /* bAlternateSetting */
|
| 478 |
|
|
0x01, /* bNumEndpoints */
|
| 479 |
|
|
0x03, /* bInterfaceClass: HID code */
|
| 480 |
|
|
0x01, /* bInterfaceSubclass boot */
|
| 481 |
|
|
0x02, /* bInterfaceProtocol mouse boot */
|
| 482 |
|
|
usbINTERFACE_STRING,/* iInterface */
|
| 483 |
|
|
|
| 484 |
|
|
/* HID Descriptor */
|
| 485 |
|
|
0x09, /* bLength */
|
| 486 |
|
|
0x21, /* bDescriptor type: HID Descriptor Type */
|
| 487 |
|
|
0x00, 0x01, /* bcdHID */
|
| 488 |
|
|
0x00, /* bCountryCode */
|
| 489 |
|
|
0x01, /* bNumDescriptors */
|
| 490 |
|
|
usbHID_REPORT_DESCRIPTOR, /* bDescriptorType */
|
| 491 |
|
|
sizeof( pxReportDescriptor ), 0x00, /* wItemLength */
|
| 492 |
|
|
|
| 493 |
|
|
/* Endpoint 1 descriptor */
|
| 494 |
|
|
0x07, /* bLength */
|
| 495 |
|
|
0x05, /* bDescriptorType */
|
| 496 |
|
|
0x81, /* bEndpointAddress, Endpoint 01 - IN */
|
| 497 |
|
|
0x03, /* bmAttributes INT */
|
| 498 |
|
|
0x08, 0x00, /* wMaxPacketSize: 8? */
|
| 499 |
|
|
0x0A /* bInterval */
|
| 500 |
|
|
};
|
| 501 |
|
|
|
| 502 |
|
|
/*-----------------------------------------------------------*/
|
| 503 |
|
|
|
| 504 |
|
|
/* File scope state variables. */
|
| 505 |
|
|
static unsigned char ucUSBConfig = ( unsigned char ) 0;
|
| 506 |
|
|
static unsigned long ulReceivedAddress = ( unsigned long ) 0;
|
| 507 |
|
|
static eDRIVER_STATE eDriverState = eNOTHING;
|
| 508 |
|
|
|
| 509 |
|
|
/* Structure used to control the characters being sent to the host. */
|
| 510 |
|
|
static xTX_MESSAGE pxCharsForTx;
|
| 511 |
|
|
|
| 512 |
|
|
/* Queue used to pass messages between the ISR and the task. */
|
| 513 |
|
|
xQueueHandle xUSBInterruptQueue;
|
| 514 |
|
|
|
| 515 |
|
|
/*-----------------------------------------------------------*/
|
| 516 |
|
|
|
| 517 |
|
|
void vStartUSBTask( unsigned portBASE_TYPE uxPriority )
|
| 518 |
|
|
{
|
| 519 |
|
|
/* Create the queue used to communicate between the USB ISR and task. */
|
| 520 |
|
|
xUSBInterruptQueue = xQueueCreate( usbQUEUE_LENGTH + 1, sizeof( xISRStatus * ) );
|
| 521 |
|
|
|
| 522 |
|
|
/* Create the task itself. */
|
| 523 |
|
|
xTaskCreate( vUSBDemoTask, "USB", configMINIMAL_STACK_SIZE, NULL, uxPriority, NULL );
|
| 524 |
|
|
}
|
| 525 |
|
|
/*-----------------------------------------------------------*/
|
| 526 |
|
|
|
| 527 |
|
|
static void vUSBDemoTask( void *pvParameters )
|
| 528 |
|
|
{
|
| 529 |
|
|
xISRStatus *pxMessage;
|
| 530 |
|
|
|
| 531 |
|
|
/* The parameters are not used in this task. */
|
| 532 |
|
|
( void ) pvParameters;
|
| 533 |
|
|
|
| 534 |
|
|
/* Init USB device */
|
| 535 |
|
|
portENTER_CRITICAL();
|
| 536 |
|
|
vInitUSBInterface();
|
| 537 |
|
|
portEXIT_CRITICAL();
|
| 538 |
|
|
|
| 539 |
|
|
/* Process interrupts as they arrive. The ISR takes a snapshot of the
|
| 540 |
|
|
interrupt status then posts the information on this queue for processing
|
| 541 |
|
|
at the task level. This simple demo implementation only processes
|
| 542 |
|
|
a few interrupt sources. */
|
| 543 |
|
|
for( ;; )
|
| 544 |
|
|
{
|
| 545 |
|
|
if( xQueueReceive( xUSBInterruptQueue, &pxMessage, usbSHORT_DELAY ) )
|
| 546 |
|
|
{
|
| 547 |
|
|
if( pxMessage->ulISR & AT91C_UDP_EPINT0 )
|
| 548 |
|
|
{
|
| 549 |
|
|
/* Process end point 0 interrupt. */
|
| 550 |
|
|
prvProcessEndPoint0Interrupt( pxMessage );
|
| 551 |
|
|
}
|
| 552 |
|
|
|
| 553 |
|
|
if( pxMessage->ulISR & AT91C_UDP_ENDBUSRES )
|
| 554 |
|
|
{
|
| 555 |
|
|
/* Process an end of bus reset interrupt. */
|
| 556 |
|
|
prvResetEndPoints();
|
| 557 |
|
|
}
|
| 558 |
|
|
}
|
| 559 |
|
|
else
|
| 560 |
|
|
{
|
| 561 |
|
|
/* The ISR did not post any data for us to process on the queue, so
|
| 562 |
|
|
just generate and send some sample data. */
|
| 563 |
|
|
if( eDriverState == eREADY_TO_SEND )
|
| 564 |
|
|
{
|
| 565 |
|
|
prvTransmitSampleValues();
|
| 566 |
|
|
}
|
| 567 |
|
|
}
|
| 568 |
|
|
}
|
| 569 |
|
|
}
|
| 570 |
|
|
/*-----------------------------------------------------------*/
|
| 571 |
|
|
|
| 572 |
|
|
static void prvControlCursorSpeed( signed char *cVal, unsigned long ulInput, unsigned long ulSwitch1, unsigned long ulSwitch2 )
|
| 573 |
|
|
{
|
| 574 |
|
|
const char cSpeed = 20;
|
| 575 |
|
|
|
| 576 |
|
|
if( !( ulInput & ulSwitch1 ) )
|
| 577 |
|
|
{
|
| 578 |
|
|
/* We are going in the decreasing y direction. */
|
| 579 |
|
|
if( *cVal > 0 )
|
| 580 |
|
|
{
|
| 581 |
|
|
/* We have changed direction since last time so start from
|
| 582 |
|
|
|
| 583 |
|
|
*cVal = 0;
|
| 584 |
|
|
}
|
| 585 |
|
|
|
| 586 |
|
|
if( *cVal > -cSpeed )
|
| 587 |
|
|
{
|
| 588 |
|
|
/* Ramp y down to the max speed. */
|
| 589 |
|
|
(*cVal)--;
|
| 590 |
|
|
}
|
| 591 |
|
|
}
|
| 592 |
|
|
else if( !( ulInput & ulSwitch2 ) )
|
| 593 |
|
|
{
|
| 594 |
|
|
/* We are going in the increasing y direction. */
|
| 595 |
|
|
if( *cVal < 0 )
|
| 596 |
|
|
{
|
| 597 |
|
|
/* We have changed direction since last time, so start from
|
| 598 |
|
|
|
| 599 |
|
|
*cVal = 0;
|
| 600 |
|
|
}
|
| 601 |
|
|
|
| 602 |
|
|
if( *cVal < cSpeed )
|
| 603 |
|
|
{
|
| 604 |
|
|
/* Ramp y up to the max speed again. */
|
| 605 |
|
|
(*cVal)++;
|
| 606 |
|
|
}
|
| 607 |
|
|
}
|
| 608 |
|
|
else
|
| 609 |
|
|
{
|
| 610 |
|
|
*cVal = 0;
|
| 611 |
|
|
}
|
| 612 |
|
|
}
|
| 613 |
|
|
/*-----------------------------------------------------------*/
|
| 614 |
|
|
|
| 615 |
|
|
static void prvTransmitSampleValues( void )
|
| 616 |
|
|
{
|
| 617 |
|
|
/* Variables to hold dummy x, y and z joystick axis data. */
|
| 618 |
|
|
static signed char x = 0, y = 0, z = 0;
|
| 619 |
|
|
unsigned long ulStatus;
|
| 620 |
|
|
|
| 621 |
|
|
ulStatus = AT91C_BASE_PIOA->PIO_PDSR;
|
| 622 |
|
|
|
| 623 |
|
|
prvControlCursorSpeed( &y, ulStatus, ( unsigned long ) usbSW1, ( unsigned long ) usbSW2 );
|
| 624 |
|
|
prvControlCursorSpeed( &x, ulStatus, ( unsigned long ) usbSW3, ( unsigned long ) usbSW4 );
|
| 625 |
|
|
|
| 626 |
|
|
/* Just make the z axis go up and down. */
|
| 627 |
|
|
z = ( ( ulStatus & usbSW_CLICK ) == 0 );
|
| 628 |
|
|
|
| 629 |
|
|
/* Can we place data in the fifo? */
|
| 630 |
|
|
if( !( AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ] & AT91C_UDP_TXPKTRDY ) )
|
| 631 |
|
|
{
|
| 632 |
|
|
/* Write our sample data to the fifo. */
|
| 633 |
|
|
AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_1 ] = z;
|
| 634 |
|
|
AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_1 ] = x;
|
| 635 |
|
|
AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_1 ] = y;
|
| 636 |
|
|
|
| 637 |
|
|
/* Send the data. */
|
| 638 |
|
|
portENTER_CRITICAL();
|
| 639 |
|
|
{
|
| 640 |
|
|
ulStatus = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ];
|
| 641 |
|
|
usbCSR_SET_BIT( &ulStatus, ( AT91C_UDP_TXPKTRDY ) );
|
| 642 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ] = ulStatus;
|
| 643 |
|
|
}
|
| 644 |
|
|
portEXIT_CRITICAL();
|
| 645 |
|
|
}
|
| 646 |
|
|
}
|
| 647 |
|
|
/*-----------------------------------------------------------*/
|
| 648 |
|
|
|
| 649 |
|
|
static void prvUSBTransmitNull( void )
|
| 650 |
|
|
{
|
| 651 |
|
|
unsigned long ulStatus;
|
| 652 |
|
|
|
| 653 |
|
|
/* Wait until the FIFO is free - even though we are not going to use it.
|
| 654 |
|
|
THERE IS NO TIMEOUT HERE! */
|
| 655 |
|
|
while( AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] & AT91C_UDP_TXPKTRDY )
|
| 656 |
|
|
{
|
| 657 |
|
|
vTaskDelay( usbSHORTEST_DELAY );
|
| 658 |
|
|
}
|
| 659 |
|
|
|
| 660 |
|
|
portENTER_CRITICAL();
|
| 661 |
|
|
{
|
| 662 |
|
|
/* Set the length of data to send to equal the index of the next byte
|
| 663 |
|
|
to send. This will prevent the ACK to this NULL packet causing any
|
| 664 |
|
|
further data transmissions. */
|
| 665 |
|
|
pxCharsForTx.ulTotalDataLength = pxCharsForTx.ulNextCharIndex;
|
| 666 |
|
|
|
| 667 |
|
|
/* Set the TXPKTRDY bit to cause a transmission with no data. */
|
| 668 |
|
|
ulStatus = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 669 |
|
|
usbCSR_SET_BIT( &ulStatus, ( AT91C_UDP_TXPKTRDY ) );
|
| 670 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
|
| 671 |
|
|
}
|
| 672 |
|
|
portEXIT_CRITICAL();
|
| 673 |
|
|
}
|
| 674 |
|
|
/*-----------------------------------------------------------*/
|
| 675 |
|
|
|
| 676 |
|
|
static void prvSendStall( void )
|
| 677 |
|
|
{
|
| 678 |
|
|
unsigned long ulStatus;
|
| 679 |
|
|
|
| 680 |
|
|
portENTER_CRITICAL();
|
| 681 |
|
|
{
|
| 682 |
|
|
/* Force a stall by simply setting the FORCESTALL bit in the CSR. */
|
| 683 |
|
|
ulStatus = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 684 |
|
|
usbCSR_SET_BIT( &ulStatus, AT91C_UDP_FORCESTALL );
|
| 685 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
|
| 686 |
|
|
}
|
| 687 |
|
|
portEXIT_CRITICAL();
|
| 688 |
|
|
}
|
| 689 |
|
|
/*-----------------------------------------------------------*/
|
| 690 |
|
|
|
| 691 |
|
|
static void prvResetEndPoints( void )
|
| 692 |
|
|
{
|
| 693 |
|
|
unsigned long ulTemp;
|
| 694 |
|
|
|
| 695 |
|
|
eDriverState = eJUST_RESET;
|
| 696 |
|
|
|
| 697 |
|
|
/* Reset all the end points. */
|
| 698 |
|
|
AT91C_BASE_UDP->UDP_RSTEP = usbEND_POINT_RESET_MASK;
|
| 699 |
|
|
AT91C_BASE_UDP->UDP_RSTEP = ( unsigned long ) 0x00;
|
| 700 |
|
|
|
| 701 |
|
|
/* Enable data to be sent and received. */
|
| 702 |
|
|
AT91C_BASE_UDP->UDP_FADDR = AT91C_UDP_FEN;
|
| 703 |
|
|
|
| 704 |
|
|
/* Repair the configuration end point. */
|
| 705 |
|
|
portENTER_CRITICAL();
|
| 706 |
|
|
{
|
| 707 |
|
|
ulTemp = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 708 |
|
|
usbCSR_SET_BIT( &ulTemp, ( ( unsigned long ) ( AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL ) ) );
|
| 709 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulTemp;
|
| 710 |
|
|
AT91C_BASE_UDP->UDP_IER = AT91C_UDP_EPINT0;
|
| 711 |
|
|
}
|
| 712 |
|
|
portEXIT_CRITICAL();
|
| 713 |
|
|
}
|
| 714 |
|
|
/*-----------------------------------------------------------*/
|
| 715 |
|
|
|
| 716 |
|
|
static void prvProcessEndPoint0Interrupt( xISRStatus *pxMessage )
|
| 717 |
|
|
{
|
| 718 |
|
|
if( pxMessage->ulCSR0 & AT91C_UDP_RX_DATA_BK0 )
|
| 719 |
|
|
{
|
| 720 |
|
|
/* We only expect to receive zero length data here as ACK's.
|
| 721 |
|
|
Set the data pointer to the end of the current Tx packet to
|
| 722 |
|
|
ensure we don't send out any more data. */
|
| 723 |
|
|
pxCharsForTx.ulNextCharIndex = pxCharsForTx.ulTotalDataLength;
|
| 724 |
|
|
}
|
| 725 |
|
|
|
| 726 |
|
|
if( pxMessage->ulCSR0 & AT91C_UDP_TXCOMP )
|
| 727 |
|
|
{
|
| 728 |
|
|
/* We received a TX complete interrupt. What we do depends on
|
| 729 |
|
|
what we sent to get this interrupt. */
|
| 730 |
|
|
|
| 731 |
|
|
if( eDriverState == eJUST_GOT_CONFIG )
|
| 732 |
|
|
{
|
| 733 |
|
|
/* We sent an acknowledgement of a SET_CONFIG request. We
|
| 734 |
|
|
are now at the end of the enumeration. */
|
| 735 |
|
|
AT91C_BASE_UDP->UDP_GLBSTATE = AT91C_UDP_CONFG;
|
| 736 |
|
|
|
| 737 |
|
|
/* Read the end point for data transfer. */
|
| 738 |
|
|
portENTER_CRITICAL();
|
| 739 |
|
|
{
|
| 740 |
|
|
unsigned long ulTemp;
|
| 741 |
|
|
|
| 742 |
|
|
ulTemp = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ];
|
| 743 |
|
|
usbCSR_SET_BIT( &ulTemp, AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN );
|
| 744 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ] = ulTemp;
|
| 745 |
|
|
AT91C_BASE_UDP->UDP_IER = AT91C_UDP_EPINT1;
|
| 746 |
|
|
}
|
| 747 |
|
|
portEXIT_CRITICAL();
|
| 748 |
|
|
|
| 749 |
|
|
eDriverState = eREADY_TO_SEND;
|
| 750 |
|
|
}
|
| 751 |
|
|
else if( eDriverState == eJUST_GOT_ADDRESS )
|
| 752 |
|
|
{
|
| 753 |
|
|
/* We sent an acknowledgement of a SET_ADDRESS request. Move
|
| 754 |
|
|
to the addressed state. */
|
| 755 |
|
|
if( ulReceivedAddress != ( unsigned long ) 0 )
|
| 756 |
|
|
{
|
| 757 |
|
|
AT91C_BASE_UDP->UDP_GLBSTATE = AT91C_UDP_FADDEN;
|
| 758 |
|
|
}
|
| 759 |
|
|
else
|
| 760 |
|
|
{
|
| 761 |
|
|
AT91C_BASE_UDP->UDP_GLBSTATE = 0;
|
| 762 |
|
|
}
|
| 763 |
|
|
|
| 764 |
|
|
AT91C_BASE_UDP->UDP_FADDR = ( AT91C_UDP_FEN | ulReceivedAddress );
|
| 765 |
|
|
eDriverState = eNOTHING;
|
| 766 |
|
|
}
|
| 767 |
|
|
else
|
| 768 |
|
|
{
|
| 769 |
|
|
/* The TXCOMP was not for any special type of transmission. See
|
| 770 |
|
|
if there is any more data to send. */
|
| 771 |
|
|
prvSendNextSegment();
|
| 772 |
|
|
}
|
| 773 |
|
|
}
|
| 774 |
|
|
|
| 775 |
|
|
if( pxMessage->ulCSR0 & AT91C_UDP_RXSETUP )
|
| 776 |
|
|
{
|
| 777 |
|
|
xUSB_REQUEST xRequest;
|
| 778 |
|
|
unsigned char ucRequest;
|
| 779 |
|
|
unsigned long ulRxBytes;
|
| 780 |
|
|
|
| 781 |
|
|
/* A data packet is available. */
|
| 782 |
|
|
ulRxBytes = pxMessage->ulCSR0 >> 16;
|
| 783 |
|
|
ulRxBytes &= usbRX_COUNT_MASK;
|
| 784 |
|
|
|
| 785 |
|
|
if( ulRxBytes >= usbEXPECTED_NUMBER_OF_BYTES )
|
| 786 |
|
|
{
|
| 787 |
|
|
/* Create an xUSB_REQUEST variable from the raw bytes array. */
|
| 788 |
|
|
|
| 789 |
|
|
xRequest.ucReqType = pxMessage->ucFifoData[ usbREQUEST_TYPE_INDEX ];
|
| 790 |
|
|
xRequest.ucRequest = pxMessage->ucFifoData[ usbREQUEST_INDEX ];
|
| 791 |
|
|
|
| 792 |
|
|
/* NOT PORTABLE CODE! */
|
| 793 |
|
|
xRequest.usValue = pxMessage->ucFifoData[ usbVALUE_HIGH_BYTE ];
|
| 794 |
|
|
xRequest.usValue <<= 8;
|
| 795 |
|
|
xRequest.usValue |= pxMessage->ucFifoData[ usbVALUE_LOW_BYTE ];
|
| 796 |
|
|
|
| 797 |
|
|
xRequest.usIndex = pxMessage->ucFifoData[ usbINDEX_HIGH_BYTE ];
|
| 798 |
|
|
xRequest.usIndex <<= 8;
|
| 799 |
|
|
xRequest.usIndex |= pxMessage->ucFifoData[ usbINDEX_LOW_BYTE ];
|
| 800 |
|
|
|
| 801 |
|
|
xRequest.usLength = pxMessage->ucFifoData[ usbLENGTH_HIGH_BYTE ];
|
| 802 |
|
|
xRequest.usLength <<= 8;
|
| 803 |
|
|
xRequest.usLength |= pxMessage->ucFifoData[ usbLENGTH_LOW_BYTE ];
|
| 804 |
|
|
|
| 805 |
|
|
/* Manipulate the ucRequestType and the ucRequest parameters to
|
| 806 |
|
|
generate a zero based request selection. This is just done to
|
| 807 |
|
|
break up the requests into subsections for clarity. The
|
| 808 |
|
|
alternative would be to have more huge switch statement that would
|
| 809 |
|
|
be difficult to optimise. */
|
| 810 |
|
|
ucRequest = ( ( xRequest.ucReqType & 0x60 ) >> 3 );
|
| 811 |
|
|
ucRequest |= ( xRequest.ucReqType & 0x03 );
|
| 812 |
|
|
|
| 813 |
|
|
switch( ucRequest )
|
| 814 |
|
|
{
|
| 815 |
|
|
case usbSTANDARD_DEVICE_REQUEST:
|
| 816 |
|
|
/* Standard Device request */
|
| 817 |
|
|
prvHandleStandardDeviceRequest( &xRequest );
|
| 818 |
|
|
break;
|
| 819 |
|
|
|
| 820 |
|
|
case usbSTANDARD_INTERFACE_REQUEST:
|
| 821 |
|
|
/* Standard Interface request */
|
| 822 |
|
|
prvHandleStandardInterfaceRequest( &xRequest );
|
| 823 |
|
|
break;
|
| 824 |
|
|
|
| 825 |
|
|
case usbSTANDARD_END_POINT_REQUEST:
|
| 826 |
|
|
/* Standard Endpoint request */
|
| 827 |
|
|
prvHandleStandardEndPointRequest( &xRequest );
|
| 828 |
|
|
break;
|
| 829 |
|
|
|
| 830 |
|
|
case usbCLASS_INTERFACE_REQUEST:
|
| 831 |
|
|
/* Class Interface request */
|
| 832 |
|
|
prvHandleClassInterfaceRequest( &xRequest );
|
| 833 |
|
|
break;
|
| 834 |
|
|
|
| 835 |
|
|
default: /* This is not something we want to respond to. */
|
| 836 |
|
|
prvSendStall();
|
| 837 |
|
|
}
|
| 838 |
|
|
}
|
| 839 |
|
|
}
|
| 840 |
|
|
}
|
| 841 |
|
|
/*-----------------------------------------------------------*/
|
| 842 |
|
|
|
| 843 |
|
|
static void prvGetStandardDeviceDescriptor( xUSB_REQUEST *pxRequest )
|
| 844 |
|
|
{
|
| 845 |
|
|
/* The type is in the high byte. Return whatever has been requested. */
|
| 846 |
|
|
switch( ( pxRequest->usValue & 0xff00 ) >> 8 )
|
| 847 |
|
|
{
|
| 848 |
|
|
case usbDESCRIPTOR_TYPE_DEVICE:
|
| 849 |
|
|
prvSendControlData( ( unsigned char * ) &pxDeviceDescriptor, pxRequest->usLength, sizeof( pxDeviceDescriptor ), pdTRUE );
|
| 850 |
|
|
break;
|
| 851 |
|
|
|
| 852 |
|
|
case usbDESCRIPTOR_TYPE_CONFIGURATION:
|
| 853 |
|
|
prvSendControlData( ( unsigned char * ) &( pxConfigDescriptor ), pxRequest->usLength, sizeof( pxConfigDescriptor ), pdTRUE );
|
| 854 |
|
|
break;
|
| 855 |
|
|
|
| 856 |
|
|
case usbDESCRIPTOR_TYPE_STRING:
|
| 857 |
|
|
|
| 858 |
|
|
/* The index to the string descriptor is the lower byte. */
|
| 859 |
|
|
switch( pxRequest->usValue & 0xff )
|
| 860 |
|
|
{
|
| 861 |
|
|
case usbLANGUAGE_STRING:
|
| 862 |
|
|
prvSendControlData( ( unsigned char * ) &pxLanguageStringDescriptor, pxRequest->usLength, sizeof(pxLanguageStringDescriptor), pdTRUE );
|
| 863 |
|
|
break;
|
| 864 |
|
|
|
| 865 |
|
|
case usbMANUFACTURER_STRING:
|
| 866 |
|
|
prvSendControlData( ( unsigned char * ) &pxManufacturerStringDescriptor, pxRequest->usLength, sizeof( pxManufacturerStringDescriptor ), pdTRUE );
|
| 867 |
|
|
break;
|
| 868 |
|
|
|
| 869 |
|
|
case usbPRODUCT_STRING:
|
| 870 |
|
|
prvSendControlData( ( unsigned char * ) &pxProductStringDescriptor, pxRequest->usLength, sizeof( pxProductStringDescriptor ), pdTRUE );
|
| 871 |
|
|
break;
|
| 872 |
|
|
|
| 873 |
|
|
case usbCONFIGURATION_STRING:
|
| 874 |
|
|
prvSendControlData( ( unsigned char * ) &pxConfigurationStringDescriptor, pxRequest->usLength, sizeof( pxConfigurationStringDescriptor ), pdTRUE );
|
| 875 |
|
|
break;
|
| 876 |
|
|
|
| 877 |
|
|
case usbINTERFACE_STRING:
|
| 878 |
|
|
prvSendControlData( ( unsigned char * ) &pxInterfaceStringDescriptor, pxRequest->usLength, sizeof( pxInterfaceStringDescriptor ), pdTRUE );
|
| 879 |
|
|
break;
|
| 880 |
|
|
|
| 881 |
|
|
default:
|
| 882 |
|
|
/* Don't know what this string is. */
|
| 883 |
|
|
prvSendStall();
|
| 884 |
|
|
break;
|
| 885 |
|
|
}
|
| 886 |
|
|
|
| 887 |
|
|
break;
|
| 888 |
|
|
|
| 889 |
|
|
default:
|
| 890 |
|
|
/* We are not responding to anything else. */
|
| 891 |
|
|
prvSendStall();
|
| 892 |
|
|
break;
|
| 893 |
|
|
}
|
| 894 |
|
|
}
|
| 895 |
|
|
/*-----------------------------------------------------------*/
|
| 896 |
|
|
|
| 897 |
|
|
static void prvHandleStandardDeviceRequest( xUSB_REQUEST *pxRequest )
|
| 898 |
|
|
{
|
| 899 |
|
|
unsigned short usStatus = 0;
|
| 900 |
|
|
|
| 901 |
|
|
switch( pxRequest->ucRequest )
|
| 902 |
|
|
{
|
| 903 |
|
|
case usbGET_STATUS_REQUEST:
|
| 904 |
|
|
/* Just send two byte dummy status. */
|
| 905 |
|
|
prvSendControlData( ( unsigned char * ) &usStatus, sizeof( usStatus ), sizeof( usStatus ), pdFALSE );
|
| 906 |
|
|
break;
|
| 907 |
|
|
|
| 908 |
|
|
case usbGET_DESCRIPTOR_REQUEST:
|
| 909 |
|
|
/* Send device descriptor */
|
| 910 |
|
|
prvGetStandardDeviceDescriptor( pxRequest );
|
| 911 |
|
|
break;
|
| 912 |
|
|
|
| 913 |
|
|
case usbGET_CONFIGURATION_REQUEST:
|
| 914 |
|
|
/* Send selected device configuration */
|
| 915 |
|
|
prvSendControlData( ( unsigned char * ) &ucUSBConfig, sizeof( ucUSBConfig ), sizeof( ucUSBConfig ), pdFALSE );
|
| 916 |
|
|
break;
|
| 917 |
|
|
|
| 918 |
|
|
case usbSET_FEATURE_REQUEST:
|
| 919 |
|
|
prvUSBTransmitNull();
|
| 920 |
|
|
break;
|
| 921 |
|
|
|
| 922 |
|
|
case usbSET_ADDRESS_REQUEST:
|
| 923 |
|
|
|
| 924 |
|
|
/* Acknowledge the SET_ADDRESS, but (according to the manual) we
|
| 925 |
|
|
cannot actually move to the addressed state until we get a TXCOMP
|
| 926 |
|
|
interrupt from this NULL packet. Therefore we just remember the
|
| 927 |
|
|
address and set our state so we know we have received the address. */
|
| 928 |
|
|
prvUSBTransmitNull();
|
| 929 |
|
|
eDriverState = eJUST_GOT_ADDRESS;
|
| 930 |
|
|
ulReceivedAddress = ( unsigned long ) pxRequest->usValue;
|
| 931 |
|
|
break;
|
| 932 |
|
|
|
| 933 |
|
|
case usbSET_CONFIGURATION_REQUEST:
|
| 934 |
|
|
|
| 935 |
|
|
/* Acknowledge the SET_CONFIGURATION, but (according to the manual)
|
| 936 |
|
|
we cannot actually move to the configured state until we get a
|
| 937 |
|
|
TXCOMP interrupt from this NULL packet. Therefore we just remember the
|
| 938 |
|
|
config and set our state so we know we have received the go ahead. */
|
| 939 |
|
|
ucUSBConfig = ( unsigned char ) ( pxRequest->usValue & 0xff );
|
| 940 |
|
|
eDriverState = eJUST_GOT_CONFIG;
|
| 941 |
|
|
prvUSBTransmitNull();
|
| 942 |
|
|
break;
|
| 943 |
|
|
|
| 944 |
|
|
default:
|
| 945 |
|
|
|
| 946 |
|
|
/* We don't answer to anything else. */
|
| 947 |
|
|
prvSendStall();
|
| 948 |
|
|
break;
|
| 949 |
|
|
}
|
| 950 |
|
|
}
|
| 951 |
|
|
/*-----------------------------------------------------------*/
|
| 952 |
|
|
|
| 953 |
|
|
static void prvHandleClassInterfaceRequest( xUSB_REQUEST *pxRequest )
|
| 954 |
|
|
{
|
| 955 |
|
|
switch( pxRequest->ucRequest )
|
| 956 |
|
|
{
|
| 957 |
|
|
case usbSET_IDLE_REQUEST:
|
| 958 |
|
|
prvUSBTransmitNull();
|
| 959 |
|
|
break;
|
| 960 |
|
|
|
| 961 |
|
|
/* This minimal implementation ignores these. */
|
| 962 |
|
|
case usbGET_REPORT_REQUEST:
|
| 963 |
|
|
case usbGET_IDLE_REQUEST:
|
| 964 |
|
|
case usbGET_PROTOCOL_REQUEST:
|
| 965 |
|
|
case usbSET_REPORT_REQUEST:
|
| 966 |
|
|
case usbSET_PROTOCOL_REQUEST:
|
| 967 |
|
|
default:
|
| 968 |
|
|
|
| 969 |
|
|
prvSendStall();
|
| 970 |
|
|
break;
|
| 971 |
|
|
}
|
| 972 |
|
|
}
|
| 973 |
|
|
/*-----------------------------------------------------------*/
|
| 974 |
|
|
|
| 975 |
|
|
static void prvGetStandardInterfaceDescriptor( xUSB_REQUEST *pxRequest )
|
| 976 |
|
|
{
|
| 977 |
|
|
switch( ( pxRequest->usValue & ( unsigned short ) 0xff00 ) >> 8 )
|
| 978 |
|
|
{
|
| 979 |
|
|
case usbHID_REPORT_DESCRIPTOR:
|
| 980 |
|
|
prvSendControlData( ( unsigned char * ) pxReportDescriptor, pxRequest->usLength, sizeof( pxReportDescriptor ), pdTRUE );
|
| 981 |
|
|
break;
|
| 982 |
|
|
|
| 983 |
|
|
default:
|
| 984 |
|
|
|
| 985 |
|
|
/* Don't expect to send any others. */
|
| 986 |
|
|
prvSendStall();
|
| 987 |
|
|
break;
|
| 988 |
|
|
}
|
| 989 |
|
|
}
|
| 990 |
|
|
/*-----------------------------------------------------------*/
|
| 991 |
|
|
|
| 992 |
|
|
static void prvHandleStandardInterfaceRequest( xUSB_REQUEST *pxRequest )
|
| 993 |
|
|
{
|
| 994 |
|
|
unsigned short usStatus = 0;
|
| 995 |
|
|
|
| 996 |
|
|
switch( pxRequest->ucRequest )
|
| 997 |
|
|
{
|
| 998 |
|
|
case usbGET_STATUS_REQUEST:
|
| 999 |
|
|
/* Send dummy 2 bytes. */
|
| 1000 |
|
|
prvSendControlData( ( unsigned char * ) &usStatus, sizeof( usStatus ), sizeof( usStatus ), pdFALSE );
|
| 1001 |
|
|
break;
|
| 1002 |
|
|
|
| 1003 |
|
|
case usbGET_DESCRIPTOR_REQUEST:
|
| 1004 |
|
|
prvGetStandardInterfaceDescriptor( pxRequest );
|
| 1005 |
|
|
break;
|
| 1006 |
|
|
|
| 1007 |
|
|
/* This minimal implementation does not respond to these. */
|
| 1008 |
|
|
case usbGET_INTERFACE_REQUEST:
|
| 1009 |
|
|
case usbSET_FEATURE_REQUEST:
|
| 1010 |
|
|
case usbSET_INTERFACE_REQUEST:
|
| 1011 |
|
|
|
| 1012 |
|
|
default:
|
| 1013 |
|
|
prvSendStall();
|
| 1014 |
|
|
break;
|
| 1015 |
|
|
}
|
| 1016 |
|
|
}
|
| 1017 |
|
|
/*-----------------------------------------------------------*/
|
| 1018 |
|
|
|
| 1019 |
|
|
static void prvHandleStandardEndPointRequest( xUSB_REQUEST *pxRequest )
|
| 1020 |
|
|
{
|
| 1021 |
|
|
switch( pxRequest->ucRequest )
|
| 1022 |
|
|
{
|
| 1023 |
|
|
/* This minimal implementation does not expect to respond to these. */
|
| 1024 |
|
|
case usbGET_STATUS_REQUEST:
|
| 1025 |
|
|
case usbCLEAR_FEATURE_REQUEST:
|
| 1026 |
|
|
case usbSET_FEATURE_REQUEST:
|
| 1027 |
|
|
|
| 1028 |
|
|
default:
|
| 1029 |
|
|
prvSendStall();
|
| 1030 |
|
|
break;
|
| 1031 |
|
|
}
|
| 1032 |
|
|
}
|
| 1033 |
|
|
/*-----------------------------------------------------------*/
|
| 1034 |
|
|
|
| 1035 |
|
|
static void vInitUSBInterface( void )
|
| 1036 |
|
|
{
|
| 1037 |
|
|
volatile unsigned long ulTemp;
|
| 1038 |
|
|
|
| 1039 |
|
|
/* Initialise a few state variables. */
|
| 1040 |
|
|
pxCharsForTx.ulNextCharIndex = ( unsigned long ) 0;
|
| 1041 |
|
|
ucUSBConfig = ( unsigned char ) 0;
|
| 1042 |
|
|
eDriverState = eNOTHING;
|
| 1043 |
|
|
|
| 1044 |
|
|
/* HARDWARE SETUP */
|
| 1045 |
|
|
|
| 1046 |
|
|
/* Set the PLL USB Divider */
|
| 1047 |
|
|
AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1;
|
| 1048 |
|
|
|
| 1049 |
|
|
/* Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock. */
|
| 1050 |
|
|
AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;
|
| 1051 |
|
|
AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);
|
| 1052 |
|
|
|
| 1053 |
|
|
/* Setup the PIO for the USB pull up resistor. */
|
| 1054 |
|
|
AT91C_BASE_PIOA->PIO_PER = AT91C_PIO_PA16;
|
| 1055 |
|
|
AT91C_BASE_PIOA->PIO_OER = AT91C_PIO_PA16;
|
| 1056 |
|
|
|
| 1057 |
|
|
|
| 1058 |
|
|
/* Start without the pullup - this will get set at the end of this
|
| 1059 |
|
|
function. */
|
| 1060 |
|
|
AT91C_BASE_PIOA->PIO_SODR = AT91C_PIO_PA16;
|
| 1061 |
|
|
|
| 1062 |
|
|
/* When using the USB debugger the peripheral registers do not always get
|
| 1063 |
|
|
set to the correct default values. To make sure set the relevant registers
|
| 1064 |
|
|
manually here. */
|
| 1065 |
|
|
AT91C_BASE_UDP->UDP_IDR = ( unsigned long ) 0xffffffff;
|
| 1066 |
|
|
AT91C_BASE_UDP->UDP_ICR = ( unsigned long ) 0xffffffff;
|
| 1067 |
|
|
AT91C_BASE_UDP->UDP_CSR[ 0 ] = ( unsigned long ) 0x00;
|
| 1068 |
|
|
AT91C_BASE_UDP->UDP_CSR[ 1 ] = ( unsigned long ) 0x00;
|
| 1069 |
|
|
AT91C_BASE_UDP->UDP_GLBSTATE = 0;
|
| 1070 |
|
|
AT91C_BASE_UDP->UDP_FADDR = 0;
|
| 1071 |
|
|
|
| 1072 |
|
|
/* Enable the transceiver. */
|
| 1073 |
|
|
AT91C_UDP_TRANSCEIVER_ENABLE = 0;
|
| 1074 |
|
|
|
| 1075 |
|
|
/* Enable the USB interrupts - other interrupts get enabled as the
|
| 1076 |
|
|
enumeration process progresses. */
|
| 1077 |
|
|
AT91F_AIC_ConfigureIt( AT91C_ID_UDP, usbINTERRUPT_PRIORITY, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, ( void (*)( void ) ) vUSB_ISR_Wrapper );
|
| 1078 |
|
|
AT91C_BASE_AIC->AIC_IECR = 0x1 << AT91C_ID_UDP;
|
| 1079 |
|
|
|
| 1080 |
|
|
/* Wait a short while before making our presence known. */
|
| 1081 |
|
|
vTaskDelay( usbINIT_DELAY );
|
| 1082 |
|
|
AT91C_BASE_PIOA->PIO_CODR = AT91C_PIO_PA16;
|
| 1083 |
|
|
}
|
| 1084 |
|
|
/*-----------------------------------------------------------*/
|
| 1085 |
|
|
|
| 1086 |
|
|
static void prvSendControlData( unsigned char *pucData, unsigned short usRequestedLength, unsigned long ulLengthToSend, long lSendingDescriptor )
|
| 1087 |
|
|
{
|
| 1088 |
|
|
if( ( ( unsigned long ) usRequestedLength < ulLengthToSend ) )
|
| 1089 |
|
|
{
|
| 1090 |
|
|
/* Cap the data length to that requested. */
|
| 1091 |
|
|
ulLengthToSend = ( unsigned short ) usRequestedLength;
|
| 1092 |
|
|
}
|
| 1093 |
|
|
else if( ( ulLengthToSend < ( unsigned long ) usRequestedLength ) && lSendingDescriptor )
|
| 1094 |
|
|
{
|
| 1095 |
|
|
/* We are sending a descriptor. If the descriptor is an exact
|
| 1096 |
|
|
multiple of the FIFO length then it will have to be terminated
|
| 1097 |
|
|
with a NULL packet. Set the state to indicate this if
|
| 1098 |
|
|
necessary. */
|
| 1099 |
|
|
if( ( ulLengthToSend % usbFIFO_LENGTH ) == 0 )
|
| 1100 |
|
|
{
|
| 1101 |
|
|
eDriverState = eSENDING_EVEN_DESCRIPTOR;
|
| 1102 |
|
|
}
|
| 1103 |
|
|
}
|
| 1104 |
|
|
|
| 1105 |
|
|
/* Here we assume that the previous message has been sent. THERE IS NO
|
| 1106 |
|
|
BUFFER OVERFLOW PROTECTION HERE.
|
| 1107 |
|
|
|
| 1108 |
|
|
Copy the data to send into the buffer as we cannot send it all at once
|
| 1109 |
|
|
(if it is greater than 8 bytes in length). */
|
| 1110 |
|
|
memcpy( pxCharsForTx.ucTxBuffer, pucData, ulLengthToSend );
|
| 1111 |
|
|
|
| 1112 |
|
|
/* Reinitialise the buffer index so we start sending from the start of
|
| 1113 |
|
|
the data. */
|
| 1114 |
|
|
pxCharsForTx.ulTotalDataLength = ulLengthToSend;
|
| 1115 |
|
|
pxCharsForTx.ulNextCharIndex = ( unsigned long ) 0;
|
| 1116 |
|
|
|
| 1117 |
|
|
/* Send the first 8 bytes now. The rest will get sent in response to
|
| 1118 |
|
|
TXCOMP interrupts. */
|
| 1119 |
|
|
prvSendNextSegment();
|
| 1120 |
|
|
}
|
| 1121 |
|
|
/*-----------------------------------------------------------*/
|
| 1122 |
|
|
|
| 1123 |
|
|
static void prvSendNextSegment( void )
|
| 1124 |
|
|
{
|
| 1125 |
|
|
volatile unsigned long ulNextLength, ulStatus, ulLengthLeftToSend;
|
| 1126 |
|
|
|
| 1127 |
|
|
/* Is there any data to send? */
|
| 1128 |
|
|
if( pxCharsForTx.ulTotalDataLength > pxCharsForTx.ulNextCharIndex )
|
| 1129 |
|
|
{
|
| 1130 |
|
|
ulLengthLeftToSend = pxCharsForTx.ulTotalDataLength - pxCharsForTx.ulNextCharIndex;
|
| 1131 |
|
|
|
| 1132 |
|
|
/* We can only send 8 bytes to the fifo at a time. */
|
| 1133 |
|
|
if( ulLengthLeftToSend > usbFIFO_LENGTH )
|
| 1134 |
|
|
{
|
| 1135 |
|
|
ulNextLength = usbFIFO_LENGTH;
|
| 1136 |
|
|
}
|
| 1137 |
|
|
else
|
| 1138 |
|
|
{
|
| 1139 |
|
|
ulNextLength = ulLengthLeftToSend;
|
| 1140 |
|
|
}
|
| 1141 |
|
|
|
| 1142 |
|
|
/* Wait until we can place data in the fifo. THERE IS NO TIMEOUT
|
| 1143 |
|
|
HERE! */
|
| 1144 |
|
|
while( AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] & AT91C_UDP_TXPKTRDY )
|
| 1145 |
|
|
{
|
| 1146 |
|
|
vTaskDelay( usbSHORTEST_DELAY );
|
| 1147 |
|
|
}
|
| 1148 |
|
|
|
| 1149 |
|
|
/* Write the data to the FIFO. */
|
| 1150 |
|
|
while( ulNextLength > ( unsigned long ) 0 )
|
| 1151 |
|
|
{
|
| 1152 |
|
|
AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_0 ] = pxCharsForTx.ucTxBuffer[ pxCharsForTx.ulNextCharIndex ];
|
| 1153 |
|
|
|
| 1154 |
|
|
ulNextLength--;
|
| 1155 |
|
|
pxCharsForTx.ulNextCharIndex++;
|
| 1156 |
|
|
}
|
| 1157 |
|
|
|
| 1158 |
|
|
/* Start the transmission. */
|
| 1159 |
|
|
portENTER_CRITICAL();
|
| 1160 |
|
|
{
|
| 1161 |
|
|
ulStatus = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 1162 |
|
|
usbCSR_SET_BIT( &ulStatus, ( ( unsigned long ) 0x10 ) );
|
| 1163 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
|
| 1164 |
|
|
}
|
| 1165 |
|
|
portEXIT_CRITICAL();
|
| 1166 |
|
|
}
|
| 1167 |
|
|
else
|
| 1168 |
|
|
{
|
| 1169 |
|
|
/* There is no data to send. If we were sending a descriptor and the
|
| 1170 |
|
|
descriptor was an exact multiple of the max packet size then we need
|
| 1171 |
|
|
to send a null to terminate the transmission. */
|
| 1172 |
|
|
if( eDriverState == eSENDING_EVEN_DESCRIPTOR )
|
| 1173 |
|
|
{
|
| 1174 |
|
|
prvUSBTransmitNull();
|
| 1175 |
|
|
eDriverState = eNOTHING;
|
| 1176 |
|
|
}
|
| 1177 |
|
|
}
|
| 1178 |
|
|
}
|
| 1179 |
|
|
|
| 1180 |
|
|
|
| 1181 |
|
|
|
