dataRecorder.h

00001 #ifndef _DATARECORDER_H_
00002 #define _DATARECORDER_H_
00003 
00004 #include "mbed.h"
00005 #include "platform/CircularBuffer.h"
00006 #include "sdCardReader.h"
00007 
00008 
00009 //converts number to string
00010 #include <sstream>
00011 #define SSTR( x ) static_cast< std::ostringstream & >(( std::ostringstream() << std::dec << x ) ).str()
00012 
00013 // Define circular buffer size
00014 #define BUF_SIZE    10000
00015 
00016 
00017 /** Data Recorder is a class that stores data measurements in a ring buffer. 
00018 It contains an SD Card Reader with a filesystem to store measurements when required  **/
00019 
00020 class DataRecorder{
00021   public:
00022   DataRecorder(int numDataFields);
00023     /** Get Information **/
00024     // gets the number of values stored in the circular buffer
00025     int getDataQuantity();
00026     int getTimeStampQuantity();
00027     
00028     // pops the last value off of the circular buffer 
00029     uint16_t popLastDataPoint();
00030     uint32_t popLastTimeStamp();
00031 
00032     /** Set Information **/
00033     void logDistancePoint(uint16_t value);
00034     void logTimeStamp(uint32_t value);
00035  
00036     /** Save logged data to SD card **/
00037     void saveLoggedData(string filename);
00038     //saves buffer to sd card and clears it    
00039     void saveLoggedDataAndClearBuffer(string filename);
00040 
00041     int getTrialNumAndIncrement();
00042 
00043     
00044   private:
00045 
00046     void savePoint(uint16_t value);
00047     // input values are converted to char arrays
00048     // iterate over char array to add values to buffer
00049     // buffer contents it turned into a uint8_t array and written to 
00050     // sd card
00051 
00052     /* Buffers for Data Storage */
00053     CircularBuffer<uint16_t, BUF_SIZE> m_buf_data;
00054     CircularBuffer<uint32_t, BUF_SIZE> m_buf_timestamp;
00055 
00056     // Count for buffers
00057     int m_data_quantity;
00058     int m_time_quantity;
00059     
00060     /* SD Card Interface Object  */
00061     SDCardReader* m_saveBuddy;
00062     
00063     int m_numDataFields;
00064 
00065 
00066 
00067     
00068     //specialized buffers
00069     //CircularBuffer<uint16_t, BUF_SIZE> buf_distance;
00070     //CircularBuffer<uint16_t, BUF_SIZE> buf_kalmanAngle;
00071     //CircularBuffer<uint32_t, BUF_SIZE> buf_timestamp;
00072     
00073     /*CircularBuffer<char, BUF_SIZE> buf_accX;
00074     CircularBuffer<char, BUF_SIZE> buf_accY;
00075     CircularBuffer<char, BUF_SIZE> buf_accZ;
00076     CircularBuffer<char, BUF_SIZE> buf_gyroX;
00077     CircularBuffer<char, BUF_SIZE> buf_gyroY;
00078     CircularBuffer<char, BUF_SIZE> buf_gyroZ;*/
00079     
00080     //sdcard blocks
00081     //uint8_t blockDistance[4096];
00082     //int blockDistance_Index;
00083 
00084     // clear pops all elements out of buffer.
00085     /*CircularBuffer<char, BUF_SIZE> buf;
00086     char data_stream[];// = "DataToBeAddedToBuffer";
00087     uint32_t bytes_written;// = 0;
00088     int m;
00089     const uint8_t separator = ' ';*/
00090     
00091 };
00092 
00093 
00094 #endif