adk.h

00001 /* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
00002 
00003 This software may be distributed and modified under the terms of the GNU
00004 General Public License version 2 (GPL2) as published by the Free Software
00005 Foundation and appearing in the file GPL2.TXT included in the packaging of
00006 this file. Please note that GPL2 Section 2[b] requires that all works based
00007 on this software must also be made publicly available under the terms of
00008 the GPL2 ("Copyleft").
00009 
00010 Contact information
00011 -------------------
00012 
00013 Circuits At Home, LTD
00014 Web      :  http://www.circuitsathome.com
00015 e-mail   :  support@circuitsathome.com
00016  */
00017 
00018 /* Google ADK interface support header */
00019 
00020 #if !defined(_ADK_H_)
00021 #define _ADK_H_
00022 
00023 #include "Usb.h"
00024 
00025 #define ADK_VID   0x18D1
00026 #define ADK_PID   0x2D00
00027 #define ADB_PID   0x2D01
00028 
00029 #define XOOM  //enables repeating getProto() and getConf() attempts
00030 //necessary for slow devices such as Motorola XOOM
00031 //defined by default, can be commented out to save memory
00032 
00033 /* requests */
00034 
00035 #define ADK_GETPROTO      51  //check USB accessory protocol version
00036 #define ADK_SENDSTR       52  //send identifying string
00037 #define ADK_ACCSTART      53  //start device in accessory mode
00038 
00039 #define bmREQ_ADK_GET     USB_SETUP_DEVICE_TO_HOST|USB_SETUP_TYPE_VENDOR|USB_SETUP_RECIPIENT_DEVICE
00040 #define bmREQ_ADK_SEND    USB_SETUP_HOST_TO_DEVICE|USB_SETUP_TYPE_VENDOR|USB_SETUP_RECIPIENT_DEVICE
00041 
00042 #define ACCESSORY_STRING_MANUFACTURER   0
00043 #define ACCESSORY_STRING_MODEL          1
00044 #define ACCESSORY_STRING_DESCRIPTION    2
00045 #define ACCESSORY_STRING_VERSION        3
00046 #define ACCESSORY_STRING_URI            4
00047 #define ACCESSORY_STRING_SERIAL         5
00048 
00049 #define ADK_MAX_ENDPOINTS 3 //endpoint 0, bulk_IN, bulk_OUT
00050 
00051 class ADK;
00052 
00053 class ADK : public USBDeviceConfig, public UsbConfigXtracter {
00054 private:
00055         /* ID strings */
00056         const char* manufacturer;
00057         const char* model;
00058         const char* description;
00059         const char* version;
00060         const char* uri;
00061         const char* serial;
00062 
00063         /* ADK proprietary requests */
00064         uint8_t getProto(uint8_t* adkproto);
00065         uint8_t sendStr(uint8_t index, const char* str);
00066         uint8_t switchAcc(void);
00067 
00068 protected:
00069         static const uint8_t epDataInIndex; // DataIn endpoint index
00070         static const uint8_t epDataOutIndex; // DataOUT endpoint index
00071 
00072         /* mandatory members */
00073         USB *pUsb;
00074         uint8_t bAddress;
00075         uint8_t bConfNum; // configuration number
00076 
00077         uint8_t bNumEP; // total number of EP in the configuration
00078         bool ready;
00079 
00080         /* Endpoint data structure */
00081         EpInfo epInfo[ADK_MAX_ENDPOINTS];
00082 
00083         void PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr);
00084 
00085 public:
00086         ADK(USB *pUsb, const char* manufacturer,
00087                 const char* model,
00088                 const char* description,
00089                 const char* version,
00090                 const char* uri,
00091                 const char* serial);
00092 
00093         // Methods for receiving and sending data
00094         uint8_t RcvData(uint16_t *nbytesptr, uint8_t *dataptr);
00095         uint8_t SndData(uint16_t nbytes, uint8_t *dataptr);
00096 
00097 
00098         // USBDeviceConfig implementation
00099         uint8_t ConfigureDevice(uint8_t parent, uint8_t port, bool lowspeed);
00100         uint8_t Init(uint8_t parent, uint8_t port, bool lowspeed);
00101         uint8_t Release();
00102 
00103         virtual uint8_t Poll() {
00104                 return 0;
00105         };
00106 
00107         virtual uint8_t GetAddress() {
00108                 return bAddress;
00109         };
00110 
00111         virtual bool isReady() {
00112                 return ready;
00113         };
00114 
00115         virtual bool VIDPIDOK(uint16_t vid, uint16_t pid) {
00116                 return (vid == ADK_VID && (pid == ADK_PID || pid == ADB_PID));
00117         };
00118 
00119         //UsbConfigXtracter implementation
00120         void EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *ep);
00121 }; //class ADK : public USBDeviceConfig ...
00122 
00123 /* get ADK protocol version */
00124 
00125 /* returns 2 bytes in *adkproto */
00126 inline uint8_t ADK::getProto(uint8_t* adkproto) {
00127         return ( pUsb->ctrlReq(bAddress, 0, bmREQ_ADK_GET, ADK_GETPROTO, 0, 0, 0, 2, 2, adkproto, NULL));
00128 }
00129 
00130 /* send ADK string */
00131 inline uint8_t ADK::sendStr(uint8_t index, const char* str) {
00132         return ( pUsb->ctrlReq(bAddress, 0, bmREQ_ADK_SEND, ADK_SENDSTR, 0, 0, index, strlen(str) + 1, strlen(str) + 1, (uint8_t*)str, NULL));
00133 }
00134 
00135 /* switch to accessory mode */
00136 inline uint8_t ADK::switchAcc(void) {
00137         return ( pUsb->ctrlReq(bAddress, 0, bmREQ_ADK_SEND, ADK_ACCSTART, 0, 0, 0, 0, 0, NULL, NULL));
00138 }
00139 
00140 #endif // _ADK_H_
00141