Simple USBHost WebCam for EA LPC4088 QSB/LPC1768 test program
Dependencies: LPC4088-USBHost mbed
USBHostCam.h
00001 // USBHostCam.h 00002 #include "USBHostConf.h" 00003 #include "USBHost.h" 00004 #include "USBIsochronous.h" 00005 #include "BaseUvc.h" 00006 #include "decodeMJPEG.h" 00007 #pragma once 00008 00009 #define _160x120 2 00010 #define _176x144 3 00011 #define _320x176 4 00012 #define _320x240 5 00013 #define _352x288 6 00014 #define _432x240 7 00015 #define _640x480 1 00016 #define _544x288 8 00017 #define _640x360 9 00018 #define _752x416 10 00019 #define _800x448 11 00020 #define _800x600 12 00021 00022 #if 0 00023 #define TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);}; 00024 #else 00025 #define TEST_ASSERT(A) while(0) 00026 #endif 00027 00028 00029 struct CamInfo { 00030 uint16_t vid; 00031 uint16_t pid; 00032 uint8_t size; 00033 uint8_t option; 00034 // 00035 const char* name; 00036 uint8_t formatIndex; 00037 uint8_t frameIndex; 00038 uint32_t interval; 00039 uint8_t en; 00040 uint8_t mps; 00041 uint8_t if_alt; 00042 uint8_t frameCount; // ITD frame count 1-8 00043 uint8_t queueLimit; // ITD queue limit 1-3 00044 }; 00045 00046 /** 00047 * A class to communicate a Cam 00048 */ 00049 class USBHostCam : public IUSBEnumerator, public BaseUvc, public decodeMJPEG { 00050 public: 00051 /** 00052 * Constructor 00053 * 00054 */ 00055 USBHostCam(uint8_t size = _160x120, uint8_t option = 0, CamInfo* user_caminfo = NULL); 00056 00057 /** 00058 * Check if a Cam device is connected 00059 * 00060 * @return true if a Cam device is connected 00061 */ 00062 bool connected(); 00063 00064 /** 00065 * Try to connect to a Cam device 00066 * 00067 * @return true if connection was successful 00068 */ 00069 bool connect(); 00070 00071 /** 00072 * read jpeg image 00073 * 00074 * @param buf read buffer 00075 * @param size buffer size 00076 * @param timeout_ms timeout default 15sec 00077 * @return jpeg size if read success else -1 00078 */ 00079 int readJPEG(uint8_t* buf, int size, int timeout_ms = 15*1000); 00080 00081 protected: 00082 //From IUSBEnumerator 00083 virtual void setVidPid(uint16_t vid, uint16_t pid); 00084 virtual bool parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol); //Must return true if the interface should be parsed 00085 virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used 00086 00087 private: 00088 bool dev_connected; 00089 00090 int cam_intf; 00091 bool device_found; 00092 bool caminfo_found; 00093 uint8_t _seq; 00094 uint8_t* _buf; 00095 int _pos; 00096 int _size; 00097 CamInfo* CamInfoList; 00098 CamInfo* caminfo; 00099 uint8_t _caminfo_size; 00100 uint8_t _caminfo_option; 00101 00102 virtual void outputJPEG(uint8_t c, int status); // from decodeMJPEG 00103 void callback_motion_jpeg(uint16_t frame, uint8_t* buf, int len); 00104 void init(); 00105 void onDisconnect(); 00106 };
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