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			141 lines
		
	
	
		
			4.4 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			141 lines
		
	
	
		
			4.4 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
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This software may be distributed and modified under the terms of the GNU
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General Public License version 2 (GPL2) as published by the Free Software
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Foundation and appearing in the file GPL2.TXT included in the packaging of
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this file. Please note that GPL2 Section 2[b] requires that all works based
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on this software must also be made publicly available under the terms of
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the GPL2 ("Copyleft").
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Contact information
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-------------------
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Circuits At Home, LTD
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Web      :  http://www.circuitsathome.com
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e-mail   :  support@circuitsathome.com
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 */
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/* Google ADK interface support header */
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#if !defined(_ADK_H_)
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#define _ADK_H_
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#include "Usb.h"
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#define ADK_VID   0x18D1
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#define ADK_PID   0x2D00
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#define ADB_PID   0x2D01
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#define XOOM  //enables repeating getProto() and getConf() attempts
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//necessary for slow devices such as Motorola XOOM
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//defined by default, can be commented out to save memory
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/* requests */
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#define ADK_GETPROTO      51  //check USB accessory protocol version
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#define ADK_SENDSTR       52  //send identifying string
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#define ADK_ACCSTART      53  //start device in accessory mode
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#define bmREQ_ADK_GET     USB_SETUP_DEVICE_TO_HOST|USB_SETUP_TYPE_VENDOR|USB_SETUP_RECIPIENT_DEVICE
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#define bmREQ_ADK_SEND    USB_SETUP_HOST_TO_DEVICE|USB_SETUP_TYPE_VENDOR|USB_SETUP_RECIPIENT_DEVICE
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#define ACCESSORY_STRING_MANUFACTURER   0
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#define ACCESSORY_STRING_MODEL          1
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#define ACCESSORY_STRING_DESCRIPTION    2
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#define ACCESSORY_STRING_VERSION        3
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#define ACCESSORY_STRING_URI            4
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#define ACCESSORY_STRING_SERIAL         5
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#define ADK_MAX_ENDPOINTS 3 //endpoint 0, bulk_IN, bulk_OUT
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class ADK;
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class ADK : public USBDeviceConfig, public UsbConfigXtracter {
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private:
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        /* ID strings */
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        const char* manufacturer;
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        const char* model;
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        const char* description;
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        const char* version;
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        const char* uri;
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        const char* serial;
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        /* ADK proprietary requests */
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        uint8_t getProto(uint8_t* adkproto);
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        uint8_t sendStr(uint8_t index, const char* str);
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        uint8_t switchAcc(void);
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protected:
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        static const uint8_t epDataInIndex; // DataIn endpoint index
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        static const uint8_t epDataOutIndex; // DataOUT endpoint index
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        /* mandatory members */
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        USB *pUsb;
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        uint8_t bAddress;
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        uint8_t bConfNum; // configuration number
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        uint8_t bNumEP; // total number of EP in the configuration
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        bool ready;
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        /* Endpoint data structure */
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        EpInfo epInfo[ADK_MAX_ENDPOINTS];
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        void PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr);
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public:
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        ADK(USB *pUsb, const char* manufacturer,
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                const char* model,
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                const char* description,
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                const char* version,
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                const char* uri,
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                const char* serial);
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        // Methods for receiving and sending data
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        uint8_t RcvData(uint16_t *nbytesptr, uint8_t *dataptr);
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        uint8_t SndData(uint16_t nbytes, uint8_t *dataptr);
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        // USBDeviceConfig implementation
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        uint8_t ConfigureDevice(uint8_t parent, uint8_t port, bool lowspeed);
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        uint8_t Init(uint8_t parent, uint8_t port, bool lowspeed);
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        uint8_t Release();
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        virtual uint8_t Poll() {
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                return 0;
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        };
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        virtual uint8_t GetAddress() {
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                return bAddress;
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        };
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        virtual bool isReady() {
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                return ready;
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        };
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        virtual bool VIDPIDOK(uint16_t vid, uint16_t pid) {
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                return (vid == ADK_VID && (pid == ADK_PID || pid == ADB_PID));
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        };
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        //UsbConfigXtracter implementation
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        void EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *ep);
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}; //class ADK : public USBDeviceConfig ...
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/* get ADK protocol version */
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/* returns 2 bytes in *adkproto */
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inline uint8_t ADK::getProto(uint8_t* adkproto) {
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        return ( pUsb->ctrlReq(bAddress, 0, bmREQ_ADK_GET, ADK_GETPROTO, 0, 0, 0, 2, 2, adkproto, NULL));
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}
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/* send ADK string */
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inline uint8_t ADK::sendStr(uint8_t index, const char* str) {
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        return ( pUsb->ctrlReq(bAddress, 0, bmREQ_ADK_SEND, ADK_SENDSTR, 0, 0, index, strlen(str) + 1, strlen(str) + 1, (uint8_t*)str, NULL));
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}
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/* switch to accessory mode */
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inline uint8_t ADK::switchAcc(void) {
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        return ( pUsb->ctrlReq(bAddress, 0, bmREQ_ADK_SEND, ADK_ACCSTART, 0, 0, 0, 0, 0, NULL, NULL));
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}
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#endif // _ADK_H_
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