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jeremybenn |
/*
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FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* If you are: *
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* *
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* + New to FreeRTOS, *
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* + Wanting to learn FreeRTOS or multitasking in general quickly *
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* + Looking for basic training, *
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* + Wanting to improve your FreeRTOS skills and productivity *
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* *
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* then take a look at the FreeRTOS books - available as PDF or paperback *
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* *
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* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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* http://www.FreeRTOS.org/Documentation *
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* *
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* A pdf reference manual is also available. Both are usually delivered *
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* to your inbox within 20 minutes to two hours when purchased between 8am *
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* and 8pm GMT (although please allow up to 24 hours in case of *
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* exceptional circumstances). Thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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***NOTE*** The exception to the GPL is included to allow you to distribute
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a combined work that includes FreeRTOS without being obliged to provide the
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source code for proprietary components outside of the FreeRTOS kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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*/
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/*
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Sample interrupt driven USB device driver. This is a minimal implementation
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for demonstration only. Although functional, it is not a full and compliant
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implementation.
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The USB device enumerates as a simple 3 axis joystick, and once configured
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transmits 3 axis of data which can be viewed from the USB host machine.
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This file implements the USB interrupt service routine, and a demo FreeRTOS
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task. The interrupt service routine handles the USB hardware - taking a
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snapshot of the USB status at the point of the interrupt. The task receives
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the status information from the interrupt for processing at the task level.
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See the FreeRTOS.org WEB documentation for more information.
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*/
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/*
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Changes from V2.5.5
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+ Descriptors that have a length that is an exact multiple of usbFIFO_LENGTH
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can now be transmitted. To this end an extra parameter has been
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added to the prvSendControlData() function, and the state
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eSENDING_EVEN_DESCRIPTOR has been introduced. Thanks to Scott Miller for
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assisting with this contribution.
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Changes from V2.6.0
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+ Replaced the duplicated RX_DATA_BK0 in the interrupt mask with the
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RX_DATA_BK1.
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*/
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/* Standard includes. */
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#include <string.h>
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/* Demo board includes. */
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#include "board.h"
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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#include "queue.h"
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/* Descriptor type definitions. */
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#define usbDESCRIPTOR_TYPE_DEVICE ( 0x01 )
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#define usbDESCRIPTOR_TYPE_CONFIGURATION ( 0x02 )
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#define usbDESCRIPTOR_TYPE_STRING ( 0x03 )
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/* USB request type definitions. */
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#define usbGET_REPORT_REQUEST ( 0x01 )
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#define usbGET_IDLE_REQUEST ( 0x02 )
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#define usbGET_PROTOCOL_REQUEST ( 0x03 )
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#define usbSET_REPORT_REQUEST ( 0x09 )
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#define usbSET_IDLE_REQUEST ( 0x0A )
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#define usbSET_PROTOCOL_REQUEST ( 0x0B )
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#define usbGET_CONFIGURATION_REQUEST ( 0x08 )
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#define usbGET_STATUS_REQUEST ( 0x00 )
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#define usbCLEAR_FEATURE_REQUEST ( 0x01 )
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#define usbSET_FEATURE_REQUEST ( 0x03 )
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#define usbSET_ADDRESS_REQUEST ( 0x05 )
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#define usbGET_DESCRIPTOR_REQUEST ( 0x06 )
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#define usbSET_CONFIGURATION_REQUEST ( 0x09 )
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#define usbGET_INTERFACE_REQUEST ( 0x0A )
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#define usbSET_INTERFACE_REQUEST ( 0x0B )
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/* Misc USB definitions. */
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#define usbDEVICE_CLASS_VENDOR_SPECIFIC ( 0xFF )
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#define usbBUS_POWERED ( 0x80 )
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#define usbHID_REPORT_DESCRIPTOR ( 0x22 )
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#define AT91C_UDP_TRANSCEIVER_ENABLE ( *( ( unsigned long * ) 0xfffb0074 ) )
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/* Index to the various string. */
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#define usbLANGUAGE_STRING ( 0 )
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#define usbMANUFACTURER_STRING ( 1 )
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#define usbPRODUCT_STRING ( 2 )
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#define usbCONFIGURATION_STRING ( 3 )
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#define usbINTERFACE_STRING ( 4 )
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/* Data indexes for reading the request from the xISRStatus.ucFifoData[]
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into xUSB_REQUEST. The data order is designed for speed - so looks a
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little odd. */
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#define usbREQUEST_TYPE_INDEX ( 7 )
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#define usbREQUEST_INDEX ( 6 )
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#define usbVALUE_HIGH_BYTE ( 4 )
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#define usbVALUE_LOW_BYTE ( 5 )
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#define usbINDEX_HIGH_BYTE ( 2 )
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#define usbINDEX_LOW_BYTE ( 3 )
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#define usbLENGTH_HIGH_BYTE ( 0 )
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#define usbLENGTH_LOW_BYTE ( 1 )
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/* Misc application definitions. */
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#define usbINTERRUPT_PRIORITY ( 3 )
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#define usbQUEUE_LENGTH ( 0x3 ) /* Must have all bits set! */
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#define usbFIFO_LENGTH ( ( unsigned long ) 8 )
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#define usbEND_POINT_0 ( 0 )
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#define usbEND_POINT_1 ( 1 )
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#define usbXUP ( 1 )
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#define usbXDOWN ( 2 )
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#define usbYUP ( 3 )
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#define usbYDOWN ( 4 )
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#define usbMAX_COORD ( 120 )
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#define usbMAX_TX_MESSAGE_SIZE ( 128 )
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#define usbRX_COUNT_MASK ( ( unsigned long ) 0x7ff )
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#define AT91C_UDP_STALLSENT AT91C_UDP_ISOERROR
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#define usbSHORTEST_DELAY ( ( portTickType ) 1 )
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#define usbINIT_DELAY ( ( portTickType ) 500 / portTICK_RATE_MS )
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#define usbSHORT_DELAY ( ( portTickType ) 50 / portTICK_RATE_MS )
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#define usbEND_POINT_RESET_MASK ( ( unsigned long ) 0x0f )
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#define usbDATA_INC ( ( char ) 5 )
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#define usbEXPECTED_NUMBER_OF_BYTES ( ( unsigned long ) 8 )
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/* Control request types. */
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#define usbSTANDARD_DEVICE_REQUEST ( 0 )
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#define usbSTANDARD_INTERFACE_REQUEST ( 1 )
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#define usbSTANDARD_END_POINT_REQUEST ( 2 )
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#define usbCLASS_INTERFACE_REQUEST ( 5 )
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/*-----------------------------------------------------------*/
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/* Structure used to take a snapshot of the USB status from within the ISR. */
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typedef struct X_ISR_STATUS
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{
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unsigned long ulISR;
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unsigned long ulCSR0;
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unsigned char ucFifoData[ 8 ];
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} xISRStatus;
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/* Structure used to hold the received requests. */
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typedef struct
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{
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unsigned char ucReqType;
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unsigned char ucRequest;
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unsigned short usValue;
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unsigned short usIndex;
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unsigned short usLength;
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} xUSB_REQUEST;
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typedef enum
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{
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eNOTHING,
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eJUST_RESET,
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eJUST_GOT_CONFIG,
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eJUST_GOT_ADDRESS,
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eSENDING_EVEN_DESCRIPTOR,
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eREADY_TO_SEND
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} eDRIVER_STATE;
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/* Structure used to control the data being sent to the host. */
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typedef struct
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{
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unsigned char ucTxBuffer[ usbMAX_TX_MESSAGE_SIZE ];
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unsigned long ulNextCharIndex;
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unsigned long ulTotalDataLength;
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} xTX_MESSAGE;
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/*-----------------------------------------------------------*/
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/*
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* The USB interrupt service routine. This takes a snapshot of the USB
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* device at the time of the interrupt, clears the interrupts, and posts
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* the data to the USB processing task.
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*/
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__arm void vUSB_ISR( void );
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/*
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* Called after the bus reset interrupt - this function readies all the
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* end points for communication.
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*/
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static void prvResetEndPoints( void );
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/*
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* Setup the USB hardware, install the interrupt service routine and
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* initialise all the state variables.
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*/
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static void vInitUSBInterface( void );
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/*
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* Decode and act upon an interrupt generated by the control end point.
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*/
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static void prvProcessEndPoint0Interrupt( xISRStatus *pxMessage );
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/*
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* For simplicity requests are separated into device, interface, class
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* interface and end point requests.
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*
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* Decode and handle standard device requests originating on the control
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* end point.
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*/
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static void prvHandleStandardDeviceRequest( xUSB_REQUEST *pxRequest );
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/*
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* For simplicity requests are separated into device, interface, class
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* interface and end point requests.
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*
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* Decode and handle standard interface requests originating on the control
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* end point.
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*/
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static void prvHandleStandardInterfaceRequest( xUSB_REQUEST *pxRequest );
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/*
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* For simplicity requests are separated into device, interface, class
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* interface and end point requests.
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*
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* Decode and handle standard end point requests originating on the control
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* end point.
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*/
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static void prvHandleStandardEndPointRequest( xUSB_REQUEST *pxRequest );
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/*
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* For simplicity requests are separated into device, interface, class
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* interface and end point requests.
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*
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* Decode and handle the class interface requests.
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*/
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static void prvHandleClassInterfaceRequest( xUSB_REQUEST *pxRequest );
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/*
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* Setup the Tx buffer to send data in response to a control request.
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*
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* The data to be transmitted is buffered, the state variables are updated,
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* then prvSendNextSegment() is called to start the transmission off. Once
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* the first segment has been sent the remaining segments are transmitted
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* in response to TXCOMP interrupts until the entire buffer has been
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* sent.
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*/
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static void prvSendControlData( unsigned char *pucData, unsigned short usRequestedLength, unsigned long ulLengthLeftToSend, long lSendingDescriptor );
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/*
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* Examine the Tx buffer to see if there is any more data to be transmitted.
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*
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* If there is data to be transmitted then send the next segment. A segment
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* can have a maximum of 8 bytes (this is defined as the maximum for the end
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* point by the descriptor). The final segment may be less than 8 bytes if
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* the total data length was not an exact multiple of 8.
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*/
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static void prvSendNextSegment( void );
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/*
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* A stall condition is forced each time the host makes a request that is not
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* supported by this minimal implementation.
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*
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* A stall is forced by setting the appropriate bit in the end points control
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* and status register.
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*/
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static void prvSendStall( void );
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/*
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* A NULL (or zero length packet) is transmitted in acknowledge the reception
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* of certain events from the host.
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*/
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static void prvUSBTransmitNull( void );
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/*
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* When the host requests a descriptor this function is called to determine
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* which descriptor is being requested and start its transmission.
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*/
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static void prvGetStandardInterfaceDescriptor( xUSB_REQUEST *pxRequest );
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/*
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* This demo USB device enumerates as a simple 3 axis joystick. Once
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* configured this function is periodically called to generate some sample
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* joystick data.
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*
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* The x and y axis are made to move in a square. The z axis is made to
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* repeatedly increment up to its maximum.
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*/
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static void prvTransmitSampleValues( void );
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/*
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* The created task to handle the USB demo functionality.
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*/
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void vUSBDemoTask( void *pvParameters );
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/*-----------------------------------------------------------*/
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/*
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- DESCRIPTOR DEFINITIONS -
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*/
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/* String descriptors used during the enumeration process.
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These take the form:
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{
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Length of descriptor,
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Descriptor type,
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Data
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}
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*/
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const char pxLanguageStringDescriptor[] =
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{
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|
|
4,
|
| 346 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 347 |
|
|
0x09, 0x04
|
| 348 |
|
|
};
|
| 349 |
|
|
|
| 350 |
|
|
const char pxManufacturerStringDescriptor[] =
|
| 351 |
|
|
{
|
| 352 |
|
|
18,
|
| 353 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 354 |
|
|
|
| 355 |
|
|
'F', 0x00,
|
| 356 |
|
|
'r', 0x00,
|
| 357 |
|
|
'e', 0x00,
|
| 358 |
|
|
'e', 0x00,
|
| 359 |
|
|
'R', 0x00,
|
| 360 |
|
|
'T', 0x00,
|
| 361 |
|
|
'O', 0x00,
|
| 362 |
|
|
'S', 0x00
|
| 363 |
|
|
};
|
| 364 |
|
|
|
| 365 |
|
|
const char pxProductStringDescriptor[] =
|
| 366 |
|
|
{
|
| 367 |
|
|
44,
|
| 368 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 369 |
|
|
|
| 370 |
|
|
'F', 0x00,
|
| 371 |
|
|
'r', 0x00,
|
| 372 |
|
|
'e', 0x00,
|
| 373 |
|
|
'e', 0x00,
|
| 374 |
|
|
'R', 0x00,
|
| 375 |
|
|
'T', 0x00,
|
| 376 |
|
|
'O', 0x00,
|
| 377 |
|
|
'S', 0x00,
|
| 378 |
|
|
'.', 0x00,
|
| 379 |
|
|
'o', 0x00,
|
| 380 |
|
|
'r', 0x00,
|
| 381 |
|
|
'g', 0x00,
|
| 382 |
|
|
' ', 0x00,
|
| 383 |
|
|
'J', 0x00,
|
| 384 |
|
|
'o', 0x00,
|
| 385 |
|
|
'y', 0x00,
|
| 386 |
|
|
's', 0x00,
|
| 387 |
|
|
't', 0x00,
|
| 388 |
|
|
'i', 0x00,
|
| 389 |
|
|
'c', 0x00,
|
| 390 |
|
|
'k', 0x00
|
| 391 |
|
|
};
|
| 392 |
|
|
|
| 393 |
|
|
const char pxConfigurationStringDescriptor[] =
|
| 394 |
|
|
{
|
| 395 |
|
|
38,
|
| 396 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 397 |
|
|
|
| 398 |
|
|
'C', 0x00,
|
| 399 |
|
|
'o', 0x00,
|
| 400 |
|
|
'n', 0x00,
|
| 401 |
|
|
'f', 0x00,
|
| 402 |
|
|
'i', 0x00,
|
| 403 |
|
|
'g', 0x00,
|
| 404 |
|
|
'u', 0x00,
|
| 405 |
|
|
'r', 0x00,
|
| 406 |
|
|
'a', 0x00,
|
| 407 |
|
|
't', 0x00,
|
| 408 |
|
|
'i', 0x00,
|
| 409 |
|
|
'o', 0x00,
|
| 410 |
|
|
'n', 0x00,
|
| 411 |
|
|
' ', 0x00,
|
| 412 |
|
|
'N', 0x00,
|
| 413 |
|
|
'a', 0x00,
|
| 414 |
|
|
'm', 0x00,
|
| 415 |
|
|
'e', 0x00
|
| 416 |
|
|
};
|
| 417 |
|
|
|
| 418 |
|
|
const char pxInterfaceStringDescriptor[] =
|
| 419 |
|
|
{
|
| 420 |
|
|
30,
|
| 421 |
|
|
usbDESCRIPTOR_TYPE_STRING,
|
| 422 |
|
|
|
| 423 |
|
|
'I', 0x00,
|
| 424 |
|
|
'n', 0x00,
|
| 425 |
|
|
't', 0x00,
|
| 426 |
|
|
'e', 0x00,
|
| 427 |
|
|
'r', 0x00,
|
| 428 |
|
|
'f', 0x00,
|
| 429 |
|
|
'a', 0x00,
|
| 430 |
|
|
'c', 0x00,
|
| 431 |
|
|
'e', 0x00,
|
| 432 |
|
|
' ', 0x00,
|
| 433 |
|
|
'N', 0x00,
|
| 434 |
|
|
'a', 0x00,
|
| 435 |
|
|
'm', 0x00,
|
| 436 |
|
|
'e', 0x00
|
| 437 |
|
|
};
|
| 438 |
|
|
|
| 439 |
|
|
/* Enumeration descriptors. */
|
| 440 |
|
|
const char pxReportDescriptor[] =
|
| 441 |
|
|
{
|
| 442 |
|
|
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
|
| 443 |
|
|
0x09, 0x04, /* USAGE (Joystick) */
|
| 444 |
|
|
0xa1, 0x01, /* COLLECTION (Application) */
|
| 445 |
|
|
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
|
| 446 |
|
|
0x09, 0x01, /* USAGE (Pointer) */
|
| 447 |
|
|
0xa1, 0x00, /* COLLECTION (Physical) */
|
| 448 |
|
|
0x09, 0x30, /* USAGE (X) */
|
| 449 |
|
|
0x09, 0x31, /* USAGE (Y) */
|
| 450 |
|
|
0x09, 0x32, /* USAGE (Z) */
|
| 451 |
|
|
0x15, 0x81, /* LOGICAL_MINIMUM (-127) */
|
| 452 |
|
|
0x25, 0x7f, /* LOGICAL_MAXIMUM (127) */
|
| 453 |
|
|
0x75, 0x08, /* REPORT_SIZE (8) */
|
| 454 |
|
|
0x95, 0x03, /* REPORT_COUNT (3) */
|
| 455 |
|
|
0x81, 0x02, /* INPUT (Data,Var,Abs) */
|
| 456 |
|
|
0xc0, /* END_COLLECTION */
|
| 457 |
|
|
0xc0 /* END_COLLECTION */
|
| 458 |
|
|
};
|
| 459 |
|
|
|
| 460 |
|
|
const char pxDeviceDescriptor[] =
|
| 461 |
|
|
{
|
| 462 |
|
|
/* Device descriptor */
|
| 463 |
|
|
0x12, /* bLength */
|
| 464 |
|
|
0x01, /* bDescriptorType */
|
| 465 |
|
|
0x10, 0x01, /* bcdUSBL */
|
| 466 |
|
|
usbDEVICE_CLASS_VENDOR_SPECIFIC, /* bDeviceClass: */
|
| 467 |
|
|
0x00, /* bDeviceSubclass: */
|
| 468 |
|
|
0x00, /* bDeviceProtocol: */
|
| 469 |
|
|
0x08, /* bMaxPacketSize0 */
|
| 470 |
|
|
0xFF, 0xFF, /* idVendorL */
|
| 471 |
|
|
0x01, 0x00, /* idProductL */
|
| 472 |
|
|
0x00, 0x01, /* bcdDeviceL */
|
| 473 |
|
|
usbMANUFACTURER_STRING, /* iManufacturer */
|
| 474 |
|
|
usbPRODUCT_STRING, /* iProduct */
|
| 475 |
|
|
0x00, /* SerialNumber */
|
| 476 |
|
|
0x01 /* bNumConfigs */
|
| 477 |
|
|
};
|
| 478 |
|
|
|
| 479 |
|
|
const char pxConfigDescriptor[] = {
|
| 480 |
|
|
/* Configuration 1 descriptor */
|
| 481 |
|
|
0x09, /* CbLength */
|
| 482 |
|
|
0x02, /* CbDescriptorType */
|
| 483 |
|
|
0x22, 0x00, /* CwTotalLength 2 EP + Control */
|
| 484 |
|
|
0x01, /* CbNumInterfaces */
|
| 485 |
|
|
0x01, /* CbConfigurationValue */
|
| 486 |
|
|
usbCONFIGURATION_STRING,/* CiConfiguration */
|
| 487 |
|
|
usbBUS_POWERED, /* CbmAttributes Bus powered + Remote Wakeup*/
|
| 488 |
|
|
0x32, /* CMaxPower: 100mA */
|
| 489 |
|
|
|
| 490 |
|
|
/* Joystick Interface Descriptor Requirement */
|
| 491 |
|
|
0x09, /* bLength */
|
| 492 |
|
|
0x04, /* bDescriptorType */
|
| 493 |
|
|
0x00, /* bInterfaceNumber */
|
| 494 |
|
|
0x00, /* bAlternateSetting */
|
| 495 |
|
|
0x01, /* bNumEndpoints */
|
| 496 |
|
|
0x03, /* bInterfaceClass: HID code */
|
| 497 |
|
|
0x00, /* bInterfaceSubclass */
|
| 498 |
|
|
0x00, /* bInterfaceProtocol */
|
| 499 |
|
|
usbINTERFACE_STRING,/* iInterface */
|
| 500 |
|
|
|
| 501 |
|
|
/* HID Descriptor */
|
| 502 |
|
|
0x09, /* bLength */
|
| 503 |
|
|
0x21, /* bDescriptor type: HID Descriptor Type */
|
| 504 |
|
|
0x00, 0x01, /* bcdHID */
|
| 505 |
|
|
0x00, /* bCountryCode */
|
| 506 |
|
|
0x01, /* bNumDescriptors */
|
| 507 |
|
|
usbHID_REPORT_DESCRIPTOR, /* bDescriptorType */
|
| 508 |
|
|
sizeof( pxReportDescriptor ), 0x00, /* wItemLength */
|
| 509 |
|
|
|
| 510 |
|
|
/* Endpoint 1 descriptor */
|
| 511 |
|
|
0x07, /* bLength */
|
| 512 |
|
|
0x05, /* bDescriptorType */
|
| 513 |
|
|
0x81, /* bEndpointAddress, Endpoint 01 - IN */
|
| 514 |
|
|
0x03, /* bmAttributes INT */
|
| 515 |
|
|
0x03, 0x00, /* wMaxPacketSize: 3 bytes (x, y, z) */
|
| 516 |
|
|
0x0A /* bInterval */
|
| 517 |
|
|
};
|
| 518 |
|
|
|
| 519 |
|
|
/*-----------------------------------------------------------*/
|
| 520 |
|
|
|
| 521 |
|
|
/* File scope state variables. */
|
| 522 |
|
|
static unsigned char ucUSBConfig = ( unsigned char ) 0;
|
| 523 |
|
|
static unsigned long ulReceivedAddress = ( unsigned long ) 0;
|
| 524 |
|
|
static eDRIVER_STATE eDriverState = eNOTHING;
|
| 525 |
|
|
|
| 526 |
|
|
/* Array in which the USB interrupt status is passed between the ISR and task. */
|
| 527 |
|
|
static xISRStatus xISRMessages[ usbQUEUE_LENGTH + 1 ];
|
| 528 |
|
|
|
| 529 |
|
|
/* Structure used to control the characters being sent to the host. */
|
| 530 |
|
|
static xTX_MESSAGE pxCharsForTx;
|
| 531 |
|
|
|
| 532 |
|
|
/* Queue used to pass messages between the ISR and the task. */
|
| 533 |
|
|
static xQueueHandle xUSBInterruptQueue;
|
| 534 |
|
|
|
| 535 |
|
|
/* ISR entry has to be written in the asm file as we want a context switch
|
| 536 |
|
|
to occur from within the ISR. See the port documentation on the FreeRTOS.org
|
| 537 |
|
|
WEB site for more information. */
|
| 538 |
|
|
extern void vUSBISREntry( void );
|
| 539 |
|
|
|
| 540 |
|
|
/*-----------------------------------------------------------*/
|
| 541 |
|
|
|
| 542 |
|
|
/* Macros to manipulate the control and status registers. These registers
|
| 543 |
|
|
cannot be accessed using a direct read modify write operation outside of the
|
| 544 |
|
|
ISR as some bits are left unchanged by writing with a 0, and some are left
|
| 545 |
|
|
unchanged by writing with a 1. */
|
| 546 |
|
|
|
| 547 |
|
|
#define usbINT_CLEAR_MASK (AT91C_UDP_TXCOMP | AT91C_UDP_STALLSENT | AT91C_UDP_RXSETUP | AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1 )
|
| 548 |
|
|
|
| 549 |
|
|
#define usbCSR_SET_BIT( pulValueNow, ulBit ) \
|
| 550 |
|
|
{ \
|
| 551 |
|
|
/* Set TXCOMP, RX_DATA_BK0, RXSETUP, */ \
|
| 552 |
|
|
/* STALLSENT and RX_DATA_BK1 to 1 so the */ \
|
| 553 |
|
|
/* write has no effect. */ \
|
| 554 |
|
|
( * ( ( unsigned long * ) pulValueNow ) ) |= ( unsigned long ) 0x4f; \
|
| 555 |
|
|
\
|
| 556 |
|
|
/* Clear the FORCE_STALL and TXPKTRDY bits */ \
|
| 557 |
|
|
/* so the write has no effect. */ \
|
| 558 |
|
|
( * ( ( unsigned long * ) pulValueNow ) ) &= ( unsigned long ) 0xffffffcf; \
|
| 559 |
|
|
\
|
| 560 |
|
|
/* Set whichever bit we want set. */ \
|
| 561 |
|
|
( * ( ( unsigned long * ) pulValueNow ) ) |= ( ulBit ); \
|
| 562 |
|
|
}
|
| 563 |
|
|
|
| 564 |
|
|
#define usbCSR_CLEAR_BIT( pulValueNow, ulBit ) \
|
| 565 |
|
|
{ \
|
| 566 |
|
|
/* Set TXCOMP, RX_DATA_BK0, RXSETUP, */ \
|
| 567 |
|
|
/* STALLSENT and RX_DATA_BK1 to 1 so the */ \
|
| 568 |
|
|
/* write has no effect. */ \
|
| 569 |
|
|
( * ( ( unsigned long * ) pulValueNow ) ) |= ( unsigned long ) 0x4f; \
|
| 570 |
|
|
\
|
| 571 |
|
|
/* Clear the FORCE_STALL and TXPKTRDY bits */ \
|
| 572 |
|
|
/* so the write has no effect. */ \
|
| 573 |
|
|
( * ( ( unsigned long * ) pulValueNow ) ) &= ( unsigned long ) 0xffffffcf; \
|
| 574 |
|
|
\
|
| 575 |
|
|
/* Clear whichever bit we want clear. */ \
|
| 576 |
|
|
( * ( ( unsigned long * ) pulValueNow ) ) &= ( ~ulBit ); \
|
| 577 |
|
|
}
|
| 578 |
|
|
|
| 579 |
|
|
/*-----------------------------------------------------------*/
|
| 580 |
|
|
|
| 581 |
|
|
__arm void vUSB_ISR( void )
|
| 582 |
|
|
{
|
| 583 |
|
|
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
|
| 584 |
|
|
static volatile unsigned long ulNextMessage = 0;
|
| 585 |
|
|
xISRStatus *pxMessage;
|
| 586 |
|
|
unsigned long ulTemp, ulRxBytes;
|
| 587 |
|
|
|
| 588 |
|
|
/* Take the next message from the queue. Note that usbQUEUE_LENGTH *must*
|
| 589 |
|
|
be all 1's, as in 0x01, 0x03, 0x07, etc. */
|
| 590 |
|
|
pxMessage = &( xISRMessages[ ( ulNextMessage & usbQUEUE_LENGTH ) ] );
|
| 591 |
|
|
ulNextMessage++;
|
| 592 |
|
|
|
| 593 |
|
|
/* Take a snapshot of the current USB state for processing at the task
|
| 594 |
|
|
level. */
|
| 595 |
|
|
pxMessage->ulISR = AT91C_BASE_UDP->UDP_ISR;
|
| 596 |
|
|
pxMessage->ulCSR0 = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 597 |
|
|
|
| 598 |
|
|
/* Clear the interrupts from the ICR register. The bus end interrupt is
|
| 599 |
|
|
cleared separately as it does not appear in the mask register. */
|
| 600 |
|
|
AT91C_BASE_UDP->UDP_ICR = AT91C_BASE_UDP->UDP_IMR | AT91C_UDP_ENDBUSRES;
|
| 601 |
|
|
|
| 602 |
|
|
/* If there are bytes in the FIFO then we have to retrieve them here.
|
| 603 |
|
|
Ideally this would be done at the task level. However we need to clear the
|
| 604 |
|
|
RXSETUP interrupt before leaving the ISR, and this may cause the data in
|
| 605 |
|
|
the FIFO to be overwritten. Also the DIR bit has to be changed before the
|
| 606 |
|
|
RXSETUP bit is cleared (as per the SAM7 manual). */
|
| 607 |
|
|
ulTemp = pxMessage->ulCSR0;
|
| 608 |
|
|
|
| 609 |
|
|
/* Are there any bytes in the FIFO? */
|
| 610 |
|
|
ulRxBytes = ulTemp >> 16;
|
| 611 |
|
|
ulRxBytes &= usbRX_COUNT_MASK;
|
| 612 |
|
|
|
| 613 |
|
|
/* With this minimal implementation we are only interested in receiving
|
| 614 |
|
|
setup bytes on the control end point. */
|
| 615 |
|
|
if( ( ulRxBytes > 0 ) && ( ulTemp & AT91C_UDP_RXSETUP ) )
|
| 616 |
|
|
{
|
| 617 |
|
|
/* Take off 1 for a zero based index. */
|
| 618 |
|
|
while( ulRxBytes > 0 )
|
| 619 |
|
|
{
|
| 620 |
|
|
ulRxBytes--;
|
| 621 |
|
|
pxMessage->ucFifoData[ ulRxBytes ] = AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_0 ];
|
| 622 |
|
|
}
|
| 623 |
|
|
|
| 624 |
|
|
/* The direction must be changed first. */
|
| 625 |
|
|
usbCSR_SET_BIT( &ulTemp, ( AT91C_UDP_DIR ) );
|
| 626 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulTemp;
|
| 627 |
|
|
}
|
| 628 |
|
|
|
| 629 |
|
|
/* Must write zero's to TXCOMP, STALLSENT, RXSETUP, and the RX DATA
|
| 630 |
|
|
registers to clear the interrupts in the CSR register. */
|
| 631 |
|
|
usbCSR_CLEAR_BIT( &ulTemp, usbINT_CLEAR_MASK );
|
| 632 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulTemp;
|
| 633 |
|
|
|
| 634 |
|
|
/* Also clear the interrupts in the CSR1 register. */
|
| 635 |
|
|
ulTemp = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ];
|
| 636 |
|
|
usbCSR_CLEAR_BIT( &ulTemp, usbINT_CLEAR_MASK );
|
| 637 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ] = ulTemp;
|
| 638 |
|
|
|
| 639 |
|
|
/* The message now contains the entire state and optional data from
|
| 640 |
|
|
the USB interrupt. This can now be posted on the Rx queue ready for
|
| 641 |
|
|
processing at the task level. */
|
| 642 |
|
|
xQueueSendFromISR( xUSBInterruptQueue, &pxMessage, &xHigherPriorityTaskWoken );
|
| 643 |
|
|
|
| 644 |
|
|
/* We may want to switch to the USB task, if this message has made
|
| 645 |
|
|
it the highest priority task that is ready to execute. */
|
| 646 |
|
|
portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
|
| 647 |
|
|
|
| 648 |
|
|
/* Clear the AIC ready for the next interrupt. */
|
| 649 |
|
|
AT91C_BASE_AIC->AIC_EOICR = 0;
|
| 650 |
|
|
}
|
| 651 |
|
|
/*-----------------------------------------------------------*/
|
| 652 |
|
|
|
| 653 |
|
|
void vUSBDemoTask( void *pvParameters )
|
| 654 |
|
|
{
|
| 655 |
|
|
xISRStatus *pxMessage;
|
| 656 |
|
|
|
| 657 |
|
|
/* The parameters are not used in this task. */
|
| 658 |
|
|
( void ) pvParameters;
|
| 659 |
|
|
|
| 660 |
|
|
/* Init USB device */
|
| 661 |
|
|
portENTER_CRITICAL();
|
| 662 |
|
|
vInitUSBInterface();
|
| 663 |
|
|
portEXIT_CRITICAL();
|
| 664 |
|
|
|
| 665 |
|
|
/* Process interrupts as they arrive. The ISR takes a snapshot of the
|
| 666 |
|
|
interrupt status then posts the information on this queue for processing
|
| 667 |
|
|
at the task level. This simple demo implementation only processes
|
| 668 |
|
|
a few interrupt sources. */
|
| 669 |
|
|
for( ;; )
|
| 670 |
|
|
{
|
| 671 |
|
|
if( xQueueReceive( xUSBInterruptQueue, &pxMessage, usbSHORT_DELAY ) )
|
| 672 |
|
|
{
|
| 673 |
|
|
if( pxMessage->ulISR & AT91C_UDP_EPINT0 )
|
| 674 |
|
|
{
|
| 675 |
|
|
/* Process end point 0 interrupt. */
|
| 676 |
|
|
prvProcessEndPoint0Interrupt( pxMessage );
|
| 677 |
|
|
}
|
| 678 |
|
|
|
| 679 |
|
|
if( pxMessage->ulISR & AT91C_UDP_ENDBUSRES )
|
| 680 |
|
|
{
|
| 681 |
|
|
/* Process an end of bus reset interrupt. */
|
| 682 |
|
|
prvResetEndPoints();
|
| 683 |
|
|
}
|
| 684 |
|
|
}
|
| 685 |
|
|
else
|
| 686 |
|
|
{
|
| 687 |
|
|
/* The ISR did not post any data for us to process on the queue, so
|
| 688 |
|
|
just generate and send some sample data. */
|
| 689 |
|
|
if( eDriverState == eREADY_TO_SEND )
|
| 690 |
|
|
{
|
| 691 |
|
|
prvTransmitSampleValues();
|
| 692 |
|
|
}
|
| 693 |
|
|
}
|
| 694 |
|
|
}
|
| 695 |
|
|
}
|
| 696 |
|
|
/*-----------------------------------------------------------*/
|
| 697 |
|
|
|
| 698 |
|
|
static void prvTransmitSampleValues( void )
|
| 699 |
|
|
{
|
| 700 |
|
|
unsigned long ulStatus;
|
| 701 |
|
|
static long lState = usbXUP;
|
| 702 |
|
|
|
| 703 |
|
|
/* Variables to hold dummy x, y and z joystick axis data. */
|
| 704 |
|
|
static signed char x = 0, y = 0, z = 0;
|
| 705 |
|
|
|
| 706 |
|
|
/* Generate some sample data in the x and y axis - draw a square. */
|
| 707 |
|
|
switch( lState )
|
| 708 |
|
|
{
|
| 709 |
|
|
case usbXUP : x += usbDATA_INC;
|
| 710 |
|
|
if( x >= usbMAX_COORD )
|
| 711 |
|
|
{
|
| 712 |
|
|
lState = usbYUP;
|
| 713 |
|
|
}
|
| 714 |
|
|
break;
|
| 715 |
|
|
|
| 716 |
|
|
case usbXDOWN : x -= usbDATA_INC;
|
| 717 |
|
|
if( x <= -usbMAX_COORD )
|
| 718 |
|
|
{
|
| 719 |
|
|
lState = usbYDOWN;
|
| 720 |
|
|
}
|
| 721 |
|
|
break;
|
| 722 |
|
|
|
| 723 |
|
|
case usbYUP : y += usbDATA_INC;
|
| 724 |
|
|
if( y >= usbMAX_COORD )
|
| 725 |
|
|
{
|
| 726 |
|
|
lState = usbXDOWN;
|
| 727 |
|
|
}
|
| 728 |
|
|
break;
|
| 729 |
|
|
|
| 730 |
|
|
case usbYDOWN : y -= usbDATA_INC;
|
| 731 |
|
|
if( y <= -usbMAX_COORD )
|
| 732 |
|
|
{
|
| 733 |
|
|
lState = usbXUP;
|
| 734 |
|
|
}
|
| 735 |
|
|
break;
|
| 736 |
|
|
}
|
| 737 |
|
|
|
| 738 |
|
|
/* Just make the z axis go up and down. */
|
| 739 |
|
|
z += usbDATA_INC;
|
| 740 |
|
|
|
| 741 |
|
|
/* Can we place data in the fifo? */
|
| 742 |
|
|
if( !( AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ] & AT91C_UDP_TXPKTRDY ) )
|
| 743 |
|
|
{
|
| 744 |
|
|
/* Write our sample data to the fifo. */
|
| 745 |
|
|
AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_1 ] = x;
|
| 746 |
|
|
AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_1 ] = y;
|
| 747 |
|
|
AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_1 ] = z;
|
| 748 |
|
|
|
| 749 |
|
|
/* Send the data. */
|
| 750 |
|
|
portENTER_CRITICAL();
|
| 751 |
|
|
{
|
| 752 |
|
|
ulStatus = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ];
|
| 753 |
|
|
usbCSR_SET_BIT( &ulStatus, ( AT91C_UDP_TXPKTRDY ) );
|
| 754 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ] = ulStatus;
|
| 755 |
|
|
}
|
| 756 |
|
|
portEXIT_CRITICAL();
|
| 757 |
|
|
}
|
| 758 |
|
|
}
|
| 759 |
|
|
/*-----------------------------------------------------------*/
|
| 760 |
|
|
|
| 761 |
|
|
static void prvUSBTransmitNull( void )
|
| 762 |
|
|
{
|
| 763 |
|
|
unsigned long ulStatus;
|
| 764 |
|
|
|
| 765 |
|
|
/* Wait until the FIFO is free - even though we are not going to use it.
|
| 766 |
|
|
THERE IS NO TIMEOUT HERE! */
|
| 767 |
|
|
while( AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] & AT91C_UDP_TXPKTRDY )
|
| 768 |
|
|
{
|
| 769 |
|
|
vTaskDelay( usbSHORTEST_DELAY );
|
| 770 |
|
|
}
|
| 771 |
|
|
|
| 772 |
|
|
portENTER_CRITICAL();
|
| 773 |
|
|
{
|
| 774 |
|
|
/* Set the length of data to send to equal the index of the next byte
|
| 775 |
|
|
to send. This will prevent the ACK to this NULL packet causing any
|
| 776 |
|
|
further data transmissions. */
|
| 777 |
|
|
pxCharsForTx.ulTotalDataLength = pxCharsForTx.ulNextCharIndex;
|
| 778 |
|
|
|
| 779 |
|
|
/* Set the TXPKTRDY bit to cause a transmission with no data. */
|
| 780 |
|
|
ulStatus = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 781 |
|
|
usbCSR_SET_BIT( &ulStatus, ( AT91C_UDP_TXPKTRDY ) );
|
| 782 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
|
| 783 |
|
|
}
|
| 784 |
|
|
portEXIT_CRITICAL();
|
| 785 |
|
|
}
|
| 786 |
|
|
/*-----------------------------------------------------------*/
|
| 787 |
|
|
|
| 788 |
|
|
static void prvSendStall( void )
|
| 789 |
|
|
{
|
| 790 |
|
|
unsigned long ulStatus;
|
| 791 |
|
|
|
| 792 |
|
|
portENTER_CRITICAL();
|
| 793 |
|
|
{
|
| 794 |
|
|
/* Force a stall by simply setting the FORCESTALL bit in the CSR. */
|
| 795 |
|
|
ulStatus = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 796 |
|
|
usbCSR_SET_BIT( &ulStatus, AT91C_UDP_FORCESTALL );
|
| 797 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
|
| 798 |
|
|
}
|
| 799 |
|
|
portEXIT_CRITICAL();
|
| 800 |
|
|
}
|
| 801 |
|
|
/*-----------------------------------------------------------*/
|
| 802 |
|
|
|
| 803 |
|
|
static void prvResetEndPoints( void )
|
| 804 |
|
|
{
|
| 805 |
|
|
unsigned long ulTemp;
|
| 806 |
|
|
|
| 807 |
|
|
eDriverState = eJUST_RESET;
|
| 808 |
|
|
|
| 809 |
|
|
/* Reset all the end points. */
|
| 810 |
|
|
AT91C_BASE_UDP->UDP_RSTEP = usbEND_POINT_RESET_MASK;
|
| 811 |
|
|
AT91C_BASE_UDP->UDP_RSTEP = ( unsigned long ) 0x00;
|
| 812 |
|
|
|
| 813 |
|
|
/* Enable data to be sent and received. */
|
| 814 |
|
|
AT91C_BASE_UDP->UDP_FADDR = AT91C_UDP_FEN;
|
| 815 |
|
|
|
| 816 |
|
|
/* Repair the configuration end point. */
|
| 817 |
|
|
portENTER_CRITICAL();
|
| 818 |
|
|
{
|
| 819 |
|
|
ulTemp = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 820 |
|
|
usbCSR_SET_BIT( &ulTemp, ( ( unsigned long ) ( AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL ) ) );
|
| 821 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulTemp;
|
| 822 |
|
|
AT91F_UDP_EnableIt( AT91C_BASE_UDP, AT91C_UDP_EPINT0 );
|
| 823 |
|
|
}
|
| 824 |
|
|
portEXIT_CRITICAL();
|
| 825 |
|
|
}
|
| 826 |
|
|
/*-----------------------------------------------------------*/
|
| 827 |
|
|
|
| 828 |
|
|
static void prvProcessEndPoint0Interrupt( xISRStatus *pxMessage )
|
| 829 |
|
|
{
|
| 830 |
|
|
if( pxMessage->ulCSR0 & AT91C_UDP_RX_DATA_BK0 )
|
| 831 |
|
|
{
|
| 832 |
|
|
/* We only expect to receive zero length data here as ACK's.
|
| 833 |
|
|
Set the data pointer to the end of the current Tx packet to
|
| 834 |
|
|
ensure we don't send out any more data. */
|
| 835 |
|
|
pxCharsForTx.ulNextCharIndex = pxCharsForTx.ulTotalDataLength;
|
| 836 |
|
|
}
|
| 837 |
|
|
|
| 838 |
|
|
if( pxMessage->ulCSR0 & AT91C_UDP_TXCOMP )
|
| 839 |
|
|
{
|
| 840 |
|
|
/* We received a TX complete interrupt. What we do depends on
|
| 841 |
|
|
what we sent to get this interrupt. */
|
| 842 |
|
|
|
| 843 |
|
|
if( eDriverState == eJUST_GOT_CONFIG )
|
| 844 |
|
|
{
|
| 845 |
|
|
/* We sent an acknowledgement of a SET_CONFIG request. We
|
| 846 |
|
|
are now at the end of the enumeration. */
|
| 847 |
|
|
AT91C_BASE_UDP->UDP_GLBSTATE = AT91C_UDP_CONFG;
|
| 848 |
|
|
|
| 849 |
|
|
/* Read the end point for data transfer. */
|
| 850 |
|
|
portENTER_CRITICAL();
|
| 851 |
|
|
{
|
| 852 |
|
|
unsigned long ulTemp;
|
| 853 |
|
|
|
| 854 |
|
|
ulTemp = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ];
|
| 855 |
|
|
usbCSR_SET_BIT( &ulTemp, AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN );
|
| 856 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_1 ] = ulTemp;
|
| 857 |
|
|
AT91F_UDP_EnableIt( AT91C_BASE_UDP, AT91C_UDP_EPINT1 );
|
| 858 |
|
|
}
|
| 859 |
|
|
portEXIT_CRITICAL();
|
| 860 |
|
|
|
| 861 |
|
|
eDriverState = eREADY_TO_SEND;
|
| 862 |
|
|
}
|
| 863 |
|
|
else if( eDriverState == eJUST_GOT_ADDRESS )
|
| 864 |
|
|
{
|
| 865 |
|
|
/* We sent an acknowledgement of a SET_ADDRESS request. Move
|
| 866 |
|
|
to the addressed state. */
|
| 867 |
|
|
if( ulReceivedAddress != ( unsigned long ) 0 )
|
| 868 |
|
|
{
|
| 869 |
|
|
AT91C_BASE_UDP->UDP_GLBSTATE = AT91C_UDP_FADDEN;
|
| 870 |
|
|
}
|
| 871 |
|
|
else
|
| 872 |
|
|
{
|
| 873 |
|
|
AT91C_BASE_UDP->UDP_GLBSTATE = 0;
|
| 874 |
|
|
}
|
| 875 |
|
|
|
| 876 |
|
|
AT91C_BASE_UDP->UDP_FADDR = ( AT91C_UDP_FEN | ulReceivedAddress );
|
| 877 |
|
|
eDriverState = eNOTHING;
|
| 878 |
|
|
}
|
| 879 |
|
|
else
|
| 880 |
|
|
{
|
| 881 |
|
|
/* The TXCOMP was not for any special type of transmission. See
|
| 882 |
|
|
if there is any more data to send. */
|
| 883 |
|
|
prvSendNextSegment();
|
| 884 |
|
|
}
|
| 885 |
|
|
}
|
| 886 |
|
|
|
| 887 |
|
|
if( pxMessage->ulCSR0 & AT91C_UDP_RXSETUP )
|
| 888 |
|
|
{
|
| 889 |
|
|
xUSB_REQUEST xRequest;
|
| 890 |
|
|
unsigned char ucRequest;
|
| 891 |
|
|
unsigned long ulRxBytes;
|
| 892 |
|
|
|
| 893 |
|
|
/* A data packet is available. */
|
| 894 |
|
|
ulRxBytes = pxMessage->ulCSR0 >> 16;
|
| 895 |
|
|
ulRxBytes &= usbRX_COUNT_MASK;
|
| 896 |
|
|
|
| 897 |
|
|
if( ulRxBytes >= usbEXPECTED_NUMBER_OF_BYTES )
|
| 898 |
|
|
{
|
| 899 |
|
|
/* Create an xUSB_REQUEST variable from the raw bytes array. */
|
| 900 |
|
|
|
| 901 |
|
|
xRequest.ucReqType = pxMessage->ucFifoData[ usbREQUEST_TYPE_INDEX ];
|
| 902 |
|
|
xRequest.ucRequest = pxMessage->ucFifoData[ usbREQUEST_INDEX ];
|
| 903 |
|
|
|
| 904 |
|
|
/* NOT PORTABLE CODE! */
|
| 905 |
|
|
xRequest.usValue = pxMessage->ucFifoData[ usbVALUE_HIGH_BYTE ];
|
| 906 |
|
|
xRequest.usValue <<= 8;
|
| 907 |
|
|
xRequest.usValue |= pxMessage->ucFifoData[ usbVALUE_LOW_BYTE ];
|
| 908 |
|
|
|
| 909 |
|
|
xRequest.usIndex = pxMessage->ucFifoData[ usbINDEX_HIGH_BYTE ];
|
| 910 |
|
|
xRequest.usIndex <<= 8;
|
| 911 |
|
|
xRequest.usIndex |= pxMessage->ucFifoData[ usbINDEX_LOW_BYTE ];
|
| 912 |
|
|
|
| 913 |
|
|
xRequest.usLength = pxMessage->ucFifoData[ usbLENGTH_HIGH_BYTE ];
|
| 914 |
|
|
xRequest.usLength <<= 8;
|
| 915 |
|
|
xRequest.usLength |= pxMessage->ucFifoData[ usbLENGTH_LOW_BYTE ];
|
| 916 |
|
|
|
| 917 |
|
|
/* Manipulate the ucRequestType and the ucRequest parameters to
|
| 918 |
|
|
generate a zero based request selection. This is just done to
|
| 919 |
|
|
break up the requests into subsections for clarity. The
|
| 920 |
|
|
alternative would be to have more huge switch statement that would
|
| 921 |
|
|
be difficult to optimise. */
|
| 922 |
|
|
ucRequest = ( ( xRequest.ucReqType & 0x60 ) >> 3 );
|
| 923 |
|
|
ucRequest |= ( xRequest.ucReqType & 0x03 );
|
| 924 |
|
|
|
| 925 |
|
|
switch( ucRequest )
|
| 926 |
|
|
{
|
| 927 |
|
|
case usbSTANDARD_DEVICE_REQUEST:
|
| 928 |
|
|
/* Standard Device request */
|
| 929 |
|
|
prvHandleStandardDeviceRequest( &xRequest );
|
| 930 |
|
|
break;
|
| 931 |
|
|
|
| 932 |
|
|
case usbSTANDARD_INTERFACE_REQUEST:
|
| 933 |
|
|
/* Standard Interface request */
|
| 934 |
|
|
prvHandleStandardInterfaceRequest( &xRequest );
|
| 935 |
|
|
break;
|
| 936 |
|
|
|
| 937 |
|
|
case usbSTANDARD_END_POINT_REQUEST:
|
| 938 |
|
|
/* Standard Endpoint request */
|
| 939 |
|
|
prvHandleStandardEndPointRequest( &xRequest );
|
| 940 |
|
|
break;
|
| 941 |
|
|
|
| 942 |
|
|
case usbCLASS_INTERFACE_REQUEST:
|
| 943 |
|
|
/* Class Interface request */
|
| 944 |
|
|
prvHandleClassInterfaceRequest( &xRequest );
|
| 945 |
|
|
break;
|
| 946 |
|
|
|
| 947 |
|
|
default: /* This is not something we want to respond to. */
|
| 948 |
|
|
prvSendStall();
|
| 949 |
|
|
}
|
| 950 |
|
|
}
|
| 951 |
|
|
}
|
| 952 |
|
|
}
|
| 953 |
|
|
/*-----------------------------------------------------------*/
|
| 954 |
|
|
|
| 955 |
|
|
static void prvGetStandardDeviceDescriptor( xUSB_REQUEST *pxRequest )
|
| 956 |
|
|
{
|
| 957 |
|
|
/* The type is in the high byte. Return whatever has been requested. */
|
| 958 |
|
|
switch( ( pxRequest->usValue & 0xff00 ) >> 8 )
|
| 959 |
|
|
{
|
| 960 |
|
|
case usbDESCRIPTOR_TYPE_DEVICE:
|
| 961 |
|
|
prvSendControlData( ( unsigned char * ) &pxDeviceDescriptor, pxRequest->usLength, sizeof( pxDeviceDescriptor ), pdTRUE );
|
| 962 |
|
|
break;
|
| 963 |
|
|
|
| 964 |
|
|
case usbDESCRIPTOR_TYPE_CONFIGURATION:
|
| 965 |
|
|
prvSendControlData( ( unsigned char * ) &( pxConfigDescriptor ), pxRequest->usLength, sizeof( pxConfigDescriptor ), pdTRUE );
|
| 966 |
|
|
break;
|
| 967 |
|
|
|
| 968 |
|
|
case usbDESCRIPTOR_TYPE_STRING:
|
| 969 |
|
|
|
| 970 |
|
|
/* The index to the string descriptor is the lower byte. */
|
| 971 |
|
|
switch( pxRequest->usValue & 0xff )
|
| 972 |
|
|
{
|
| 973 |
|
|
case usbLANGUAGE_STRING:
|
| 974 |
|
|
prvSendControlData( ( unsigned char * ) &pxLanguageStringDescriptor, pxRequest->usLength, sizeof(pxLanguageStringDescriptor), pdTRUE );
|
| 975 |
|
|
break;
|
| 976 |
|
|
|
| 977 |
|
|
case usbMANUFACTURER_STRING:
|
| 978 |
|
|
prvSendControlData( ( unsigned char * ) &pxManufacturerStringDescriptor, pxRequest->usLength, sizeof( pxManufacturerStringDescriptor ), pdTRUE );
|
| 979 |
|
|
break;
|
| 980 |
|
|
|
| 981 |
|
|
case usbPRODUCT_STRING:
|
| 982 |
|
|
prvSendControlData( ( unsigned char * ) &pxProductStringDescriptor, pxRequest->usLength, sizeof( pxProductStringDescriptor ), pdTRUE );
|
| 983 |
|
|
break;
|
| 984 |
|
|
|
| 985 |
|
|
case usbCONFIGURATION_STRING:
|
| 986 |
|
|
prvSendControlData( ( unsigned char * ) &pxConfigurationStringDescriptor, pxRequest->usLength, sizeof( pxConfigurationStringDescriptor ), pdTRUE );
|
| 987 |
|
|
break;
|
| 988 |
|
|
|
| 989 |
|
|
case usbINTERFACE_STRING:
|
| 990 |
|
|
prvSendControlData( ( unsigned char * ) &pxInterfaceStringDescriptor, pxRequest->usLength, sizeof( pxInterfaceStringDescriptor ), pdTRUE );
|
| 991 |
|
|
break;
|
| 992 |
|
|
|
| 993 |
|
|
default:
|
| 994 |
|
|
/* Don't know what this string is. */
|
| 995 |
|
|
prvSendStall();
|
| 996 |
|
|
break;
|
| 997 |
|
|
}
|
| 998 |
|
|
|
| 999 |
|
|
break;
|
| 1000 |
|
|
|
| 1001 |
|
|
default:
|
| 1002 |
|
|
/* We are not responding to anything else. */
|
| 1003 |
|
|
prvSendStall();
|
| 1004 |
|
|
break;
|
| 1005 |
|
|
}
|
| 1006 |
|
|
}
|
| 1007 |
|
|
/*-----------------------------------------------------------*/
|
| 1008 |
|
|
|
| 1009 |
|
|
static void prvHandleStandardDeviceRequest( xUSB_REQUEST *pxRequest )
|
| 1010 |
|
|
{
|
| 1011 |
|
|
unsigned short usStatus = 0;
|
| 1012 |
|
|
|
| 1013 |
|
|
switch( pxRequest->ucRequest )
|
| 1014 |
|
|
{
|
| 1015 |
|
|
case usbGET_STATUS_REQUEST:
|
| 1016 |
|
|
/* Just send two byte dummy status. */
|
| 1017 |
|
|
prvSendControlData( ( unsigned char * ) &usStatus, sizeof( usStatus ), sizeof( usStatus ), pdFALSE );
|
| 1018 |
|
|
break;
|
| 1019 |
|
|
|
| 1020 |
|
|
case usbGET_DESCRIPTOR_REQUEST:
|
| 1021 |
|
|
/* Send device descriptor */
|
| 1022 |
|
|
prvGetStandardDeviceDescriptor( pxRequest );
|
| 1023 |
|
|
break;
|
| 1024 |
|
|
|
| 1025 |
|
|
case usbGET_CONFIGURATION_REQUEST:
|
| 1026 |
|
|
/* Send selected device configuration */
|
| 1027 |
|
|
prvSendControlData( ( unsigned char * ) &ucUSBConfig, sizeof( ucUSBConfig ), sizeof( ucUSBConfig ), pdFALSE );
|
| 1028 |
|
|
break;
|
| 1029 |
|
|
|
| 1030 |
|
|
case usbSET_FEATURE_REQUEST:
|
| 1031 |
|
|
prvUSBTransmitNull();
|
| 1032 |
|
|
break;
|
| 1033 |
|
|
|
| 1034 |
|
|
case usbSET_ADDRESS_REQUEST:
|
| 1035 |
|
|
|
| 1036 |
|
|
/* Acknowledge the SET_ADDRESS, but (according to the manual) we
|
| 1037 |
|
|
cannot actually move to the addressed state until we get a TXCOMP
|
| 1038 |
|
|
interrupt from this NULL packet. Therefore we just remember the
|
| 1039 |
|
|
address and set our state so we know we have received the address. */
|
| 1040 |
|
|
prvUSBTransmitNull();
|
| 1041 |
|
|
eDriverState = eJUST_GOT_ADDRESS;
|
| 1042 |
|
|
ulReceivedAddress = ( unsigned long ) pxRequest->usValue;
|
| 1043 |
|
|
break;
|
| 1044 |
|
|
|
| 1045 |
|
|
case usbSET_CONFIGURATION_REQUEST:
|
| 1046 |
|
|
|
| 1047 |
|
|
/* Acknowledge the SET_CONFIGURATION, but (according to the manual)
|
| 1048 |
|
|
we cannot actually move to the configured state until we get a
|
| 1049 |
|
|
TXCOMP interrupt from this NULL packet. Therefore we just remember the
|
| 1050 |
|
|
config and set our state so we know we have received the go ahead. */
|
| 1051 |
|
|
ucUSBConfig = ( unsigned char ) ( pxRequest->usValue & 0xff );
|
| 1052 |
|
|
eDriverState = eJUST_GOT_CONFIG;
|
| 1053 |
|
|
prvUSBTransmitNull();
|
| 1054 |
|
|
break;
|
| 1055 |
|
|
|
| 1056 |
|
|
default:
|
| 1057 |
|
|
|
| 1058 |
|
|
/* We don't answer to anything else. */
|
| 1059 |
|
|
prvSendStall();
|
| 1060 |
|
|
break;
|
| 1061 |
|
|
}
|
| 1062 |
|
|
}
|
| 1063 |
|
|
/*-----------------------------------------------------------*/
|
| 1064 |
|
|
|
| 1065 |
|
|
static void prvHandleClassInterfaceRequest( xUSB_REQUEST *pxRequest )
|
| 1066 |
|
|
{
|
| 1067 |
|
|
switch( pxRequest->ucRequest )
|
| 1068 |
|
|
{
|
| 1069 |
|
|
case usbSET_IDLE_REQUEST:
|
| 1070 |
|
|
prvUSBTransmitNull();
|
| 1071 |
|
|
break;
|
| 1072 |
|
|
|
| 1073 |
|
|
/* This minimal implementation ignores these. */
|
| 1074 |
|
|
case usbGET_REPORT_REQUEST:
|
| 1075 |
|
|
case usbGET_IDLE_REQUEST:
|
| 1076 |
|
|
case usbGET_PROTOCOL_REQUEST:
|
| 1077 |
|
|
case usbSET_REPORT_REQUEST:
|
| 1078 |
|
|
case usbSET_PROTOCOL_REQUEST:
|
| 1079 |
|
|
default:
|
| 1080 |
|
|
|
| 1081 |
|
|
prvSendStall();
|
| 1082 |
|
|
break;
|
| 1083 |
|
|
}
|
| 1084 |
|
|
}
|
| 1085 |
|
|
/*-----------------------------------------------------------*/
|
| 1086 |
|
|
|
| 1087 |
|
|
static void prvGetStandardInterfaceDescriptor( xUSB_REQUEST *pxRequest )
|
| 1088 |
|
|
{
|
| 1089 |
|
|
switch( ( pxRequest->usValue & ( unsigned short ) 0xff00 ) >> 8 )
|
| 1090 |
|
|
{
|
| 1091 |
|
|
case usbHID_REPORT_DESCRIPTOR:
|
| 1092 |
|
|
prvSendControlData( ( unsigned char * ) pxReportDescriptor, pxRequest->usLength, sizeof( pxReportDescriptor ), pdTRUE );
|
| 1093 |
|
|
break;
|
| 1094 |
|
|
|
| 1095 |
|
|
default:
|
| 1096 |
|
|
|
| 1097 |
|
|
/* Don't expect to send any others. */
|
| 1098 |
|
|
prvSendStall();
|
| 1099 |
|
|
break;
|
| 1100 |
|
|
}
|
| 1101 |
|
|
}
|
| 1102 |
|
|
/*-----------------------------------------------------------*/
|
| 1103 |
|
|
|
| 1104 |
|
|
static void prvHandleStandardInterfaceRequest( xUSB_REQUEST *pxRequest )
|
| 1105 |
|
|
{
|
| 1106 |
|
|
unsigned short usStatus = 0;
|
| 1107 |
|
|
|
| 1108 |
|
|
switch( pxRequest->ucRequest )
|
| 1109 |
|
|
{
|
| 1110 |
|
|
case usbGET_STATUS_REQUEST:
|
| 1111 |
|
|
/* Send dummy 2 bytes. */
|
| 1112 |
|
|
prvSendControlData( ( unsigned char * ) &usStatus, sizeof( usStatus ), sizeof( usStatus ), pdFALSE );
|
| 1113 |
|
|
break;
|
| 1114 |
|
|
|
| 1115 |
|
|
case usbGET_DESCRIPTOR_REQUEST:
|
| 1116 |
|
|
prvGetStandardInterfaceDescriptor( pxRequest );
|
| 1117 |
|
|
break;
|
| 1118 |
|
|
|
| 1119 |
|
|
/* This minimal implementation does not respond to these. */
|
| 1120 |
|
|
case usbGET_INTERFACE_REQUEST:
|
| 1121 |
|
|
case usbSET_FEATURE_REQUEST:
|
| 1122 |
|
|
case usbSET_INTERFACE_REQUEST:
|
| 1123 |
|
|
|
| 1124 |
|
|
default:
|
| 1125 |
|
|
prvSendStall();
|
| 1126 |
|
|
break;
|
| 1127 |
|
|
}
|
| 1128 |
|
|
}
|
| 1129 |
|
|
/*-----------------------------------------------------------*/
|
| 1130 |
|
|
|
| 1131 |
|
|
static void prvHandleStandardEndPointRequest( xUSB_REQUEST *pxRequest )
|
| 1132 |
|
|
{
|
| 1133 |
|
|
switch( pxRequest->ucRequest )
|
| 1134 |
|
|
{
|
| 1135 |
|
|
/* This minimal implementation does not expect to respond to these. */
|
| 1136 |
|
|
case usbGET_STATUS_REQUEST:
|
| 1137 |
|
|
case usbCLEAR_FEATURE_REQUEST:
|
| 1138 |
|
|
case usbSET_FEATURE_REQUEST:
|
| 1139 |
|
|
|
| 1140 |
|
|
default:
|
| 1141 |
|
|
prvSendStall();
|
| 1142 |
|
|
break;
|
| 1143 |
|
|
}
|
| 1144 |
|
|
}
|
| 1145 |
|
|
/*-----------------------------------------------------------*/
|
| 1146 |
|
|
|
| 1147 |
|
|
static void vInitUSBInterface( void )
|
| 1148 |
|
|
{
|
| 1149 |
|
|
volatile unsigned long ulTemp;
|
| 1150 |
|
|
|
| 1151 |
|
|
/* Create the queue used to communicate between the USB ISR and task. */
|
| 1152 |
|
|
xUSBInterruptQueue = xQueueCreate( usbQUEUE_LENGTH + 1, sizeof( xISRStatus * ) );
|
| 1153 |
|
|
|
| 1154 |
|
|
/* Initialise a few state variables. */
|
| 1155 |
|
|
pxCharsForTx.ulNextCharIndex = ( unsigned long ) 0;
|
| 1156 |
|
|
ucUSBConfig = ( unsigned char ) 0;
|
| 1157 |
|
|
eDriverState = eNOTHING;
|
| 1158 |
|
|
|
| 1159 |
|
|
/* HARDWARE SETUP */
|
| 1160 |
|
|
|
| 1161 |
|
|
/* Set the PLL USB Divider */
|
| 1162 |
|
|
AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1;
|
| 1163 |
|
|
|
| 1164 |
|
|
/* Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock. */
|
| 1165 |
|
|
AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;
|
| 1166 |
|
|
AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);
|
| 1167 |
|
|
|
| 1168 |
|
|
/* Setup the PIO for the USB pull up resistor. */
|
| 1169 |
|
|
AT91F_PIO_CfgOutput(AT91C_BASE_PIOA,AT91C_PIO_PA16);
|
| 1170 |
|
|
|
| 1171 |
|
|
/* Start without the pullup - this will get set at the end of this
|
| 1172 |
|
|
function. */
|
| 1173 |
|
|
AT91F_PIO_SetOutput( AT91C_BASE_PIOA, AT91C_PIO_PA16 );
|
| 1174 |
|
|
|
| 1175 |
|
|
/* When using the USB debugger the peripheral registers do not always get
|
| 1176 |
|
|
set to the correct default values. To make sure set the relevant registers
|
| 1177 |
|
|
manually here. */
|
| 1178 |
|
|
AT91C_BASE_UDP->UDP_IDR = ( unsigned long ) 0xffffffff;
|
| 1179 |
|
|
AT91C_BASE_UDP->UDP_ICR = ( unsigned long ) 0xffffffff;
|
| 1180 |
|
|
AT91C_BASE_UDP->UDP_CSR[ 0 ] = ( unsigned long ) 0x00;
|
| 1181 |
|
|
AT91C_BASE_UDP->UDP_CSR[ 1 ] = ( unsigned long ) 0x00;
|
| 1182 |
|
|
AT91C_BASE_UDP->UDP_GLBSTATE = 0;
|
| 1183 |
|
|
AT91C_BASE_UDP->UDP_FADDR = 0;
|
| 1184 |
|
|
|
| 1185 |
|
|
/* Enable the transceiver. */
|
| 1186 |
|
|
AT91C_UDP_TRANSCEIVER_ENABLE = 0;
|
| 1187 |
|
|
|
| 1188 |
|
|
/* Enable the USB interrupts - other interrupts get enabled as the
|
| 1189 |
|
|
enumeration process progresses. */
|
| 1190 |
|
|
AT91F_AIC_ConfigureIt( AT91C_BASE_AIC, AT91C_ID_UDP, usbINTERRUPT_PRIORITY, AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE, ( void (*)( void ) ) vUSBISREntry );
|
| 1191 |
|
|
AT91F_AIC_EnableIt( AT91C_BASE_AIC, AT91C_ID_UDP );
|
| 1192 |
|
|
|
| 1193 |
|
|
/* Wait a short while before making our presence known. */
|
| 1194 |
|
|
vTaskDelay( usbINIT_DELAY );
|
| 1195 |
|
|
AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, AT91C_PIO_PA16 );
|
| 1196 |
|
|
}
|
| 1197 |
|
|
/*-----------------------------------------------------------*/
|
| 1198 |
|
|
|
| 1199 |
|
|
static void prvSendControlData( unsigned char *pucData, unsigned short usRequestedLength, unsigned long ulLengthToSend, long lSendingDescriptor )
|
| 1200 |
|
|
{
|
| 1201 |
|
|
if( ( ( unsigned long ) usRequestedLength < ulLengthToSend ) )
|
| 1202 |
|
|
{
|
| 1203 |
|
|
/* Cap the data length to that requested. */
|
| 1204 |
|
|
ulLengthToSend = ( unsigned short ) usRequestedLength;
|
| 1205 |
|
|
}
|
| 1206 |
|
|
else if( ( ulLengthToSend < ( unsigned long ) usRequestedLength ) && lSendingDescriptor )
|
| 1207 |
|
|
{
|
| 1208 |
|
|
/* We are sending a descriptor. If the descriptor is an exact
|
| 1209 |
|
|
multiple of the FIFO length then it will have to be terminated
|
| 1210 |
|
|
with a NULL packet. Set the state to indicate this if
|
| 1211 |
|
|
necessary. */
|
| 1212 |
|
|
if( ( ulLengthToSend % usbFIFO_LENGTH ) == 0 )
|
| 1213 |
|
|
{
|
| 1214 |
|
|
eDriverState = eSENDING_EVEN_DESCRIPTOR;
|
| 1215 |
|
|
}
|
| 1216 |
|
|
}
|
| 1217 |
|
|
|
| 1218 |
|
|
/* Here we assume that the previous message has been sent. THERE IS NO
|
| 1219 |
|
|
BUFFER OVERFLOW PROTECTION HERE.
|
| 1220 |
|
|
|
| 1221 |
|
|
Copy the data to send into the buffer as we cannot send it all at once
|
| 1222 |
|
|
(if it is greater than 8 bytes in length). */
|
| 1223 |
|
|
memcpy( pxCharsForTx.ucTxBuffer, pucData, ulLengthToSend );
|
| 1224 |
|
|
|
| 1225 |
|
|
/* Reinitialise the buffer index so we start sending from the start of
|
| 1226 |
|
|
the data. */
|
| 1227 |
|
|
pxCharsForTx.ulTotalDataLength = ulLengthToSend;
|
| 1228 |
|
|
pxCharsForTx.ulNextCharIndex = ( unsigned long ) 0;
|
| 1229 |
|
|
|
| 1230 |
|
|
/* Send the first 8 bytes now. The rest will get sent in response to
|
| 1231 |
|
|
TXCOMP interrupts. */
|
| 1232 |
|
|
prvSendNextSegment();
|
| 1233 |
|
|
}
|
| 1234 |
|
|
/*-----------------------------------------------------------*/
|
| 1235 |
|
|
|
| 1236 |
|
|
static void prvSendNextSegment( void )
|
| 1237 |
|
|
{
|
| 1238 |
|
|
volatile unsigned long ulNextLength, ulStatus, ulLengthLeftToSend;
|
| 1239 |
|
|
|
| 1240 |
|
|
/* Is there any data to send? */
|
| 1241 |
|
|
if( pxCharsForTx.ulTotalDataLength > pxCharsForTx.ulNextCharIndex )
|
| 1242 |
|
|
{
|
| 1243 |
|
|
ulLengthLeftToSend = pxCharsForTx.ulTotalDataLength - pxCharsForTx.ulNextCharIndex;
|
| 1244 |
|
|
|
| 1245 |
|
|
/* We can only send 8 bytes to the fifo at a time. */
|
| 1246 |
|
|
if( ulLengthLeftToSend > usbFIFO_LENGTH )
|
| 1247 |
|
|
{
|
| 1248 |
|
|
ulNextLength = usbFIFO_LENGTH;
|
| 1249 |
|
|
}
|
| 1250 |
|
|
else
|
| 1251 |
|
|
{
|
| 1252 |
|
|
ulNextLength = ulLengthLeftToSend;
|
| 1253 |
|
|
}
|
| 1254 |
|
|
|
| 1255 |
|
|
/* Wait until we can place data in the fifo. THERE IS NO TIMEOUT
|
| 1256 |
|
|
HERE! */
|
| 1257 |
|
|
while( AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] & AT91C_UDP_TXPKTRDY )
|
| 1258 |
|
|
{
|
| 1259 |
|
|
vTaskDelay( usbSHORTEST_DELAY );
|
| 1260 |
|
|
}
|
| 1261 |
|
|
|
| 1262 |
|
|
/* Write the data to the FIFO. */
|
| 1263 |
|
|
while( ulNextLength > ( unsigned long ) 0 )
|
| 1264 |
|
|
{
|
| 1265 |
|
|
AT91C_BASE_UDP->UDP_FDR[ usbEND_POINT_0 ] = pxCharsForTx.ucTxBuffer[ pxCharsForTx.ulNextCharIndex ];
|
| 1266 |
|
|
|
| 1267 |
|
|
ulNextLength--;
|
| 1268 |
|
|
pxCharsForTx.ulNextCharIndex++;
|
| 1269 |
|
|
}
|
| 1270 |
|
|
|
| 1271 |
|
|
/* Start the transmission. */
|
| 1272 |
|
|
portENTER_CRITICAL();
|
| 1273 |
|
|
{
|
| 1274 |
|
|
ulStatus = AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ];
|
| 1275 |
|
|
usbCSR_SET_BIT( &ulStatus, ( ( unsigned long ) 0x10 ) );
|
| 1276 |
|
|
AT91C_BASE_UDP->UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
|
| 1277 |
|
|
}
|
| 1278 |
|
|
portEXIT_CRITICAL();
|
| 1279 |
|
|
}
|
| 1280 |
|
|
else
|
| 1281 |
|
|
{
|
| 1282 |
|
|
/* There is no data to send. If we were sending a descriptor and the
|
| 1283 |
|
|
descriptor was an exact multiple of the max packet size then we need
|
| 1284 |
|
|
to send a null to terminate the transmission. */
|
| 1285 |
|
|
if( eDriverState == eSENDING_EVEN_DESCRIPTOR )
|
| 1286 |
|
|
{
|
| 1287 |
|
|
prvUSBTransmitNull();
|
| 1288 |
|
|
eDriverState = eNOTHING;
|
| 1289 |
|
|
}
|
| 1290 |
|
|
}
|
| 1291 |
|
|
}
|
| 1292 |
|
|
|
| 1293 |
|
|
|
| 1294 |
|
|
|
