USBHostGPS.h

00001 // Simple USBHost GPS Dongle for FRDM-KL46Z
00002 #include "USBHost.h"
00003 #include "decodeNMEA.h"
00004 
00005 #define PL2303_SET_LINE_CODING 0x20
00006 
00007 class USBHostGPS : public IUSBEnumerator {
00008 public:
00009 
00010     /**
00011     * Constructor
00012     */
00013     USBHostGPS(int baud = 38400);
00014 
00015     /**
00016      * Try to connect a USB GPS device
00017      *
00018      * @return true if connection was successful
00019      */
00020     bool connect();
00021 
00022     /**
00023     * Check if a USB GPS is connected
00024     *
00025     * @returns true if a mouse is connected
00026     */
00027     bool connected();
00028 
00029     int readNMEA(char* data, int size, int timeout_ms) {
00030         host->bulkRead(dev, bulk_in, (uint8_t*)data, size);
00031         return bulk_in->getLengthTransferred();
00032     }
00033     void attachEventRaw(void (*ptr)(char* data, int size)) {
00034         if (ptr != NULL) {
00035             onUpdateRaw = ptr;
00036         }
00037     }
00038 
00039     decodeNMEA nmea;
00040 
00041 protected:
00042     //From IUSBEnumerator
00043     virtual void setVidPid(uint16_t vid, uint16_t pid);
00044     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
00045     virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
00046 
00047 private:
00048     USBHost * host;
00049     USBDeviceConnected* dev;
00050     USBEndpoint* bulk_in;
00051     bool dev_connected;
00052     bool gps_device_found;
00053     int gps_intf;
00054 
00055     void rxHandler();
00056     void (*onUpdateRaw)(char* data, int size);
00057     uint8_t bulk_buf[64];
00058     int baud;
00059     void init();
00060 };