Log system based on external FRAM storage. Allow to collect float values in FRAM, and then store whole collection into file on flash.
Sample code
#include "mbed.h" #include "FRAMLog.h" SPI spi(p5,p6,p7); FRAMLog flog(spi, p8, 4, 2048); Serial pc(USBTX, USBRX); int main() { for( int i=0; i<2048; i++){ flog.log(i/4096.0); flog.log(i/(4096.0+1)); flog.log(i/(4096.0+2)); flog.log(i/(4096.0+3)); } flog.save(); }
Diff: FileLog.cpp
- Revision:
- 1:4e5cda0920d3
- Parent:
- 0:f211f4870371
diff -r f211f4870371 -r 4e5cda0920d3 FileLog.cpp --- a/FileLog.cpp Mon Oct 15 17:04:49 2012 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,50 +0,0 @@ -/* mbed File Log Library - * Copyright (c) 2012 Oleg Evsegneev - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "mbed.h" -#include "FileLog.h" - -FileLog::FileLog( short cols, short rows ): _local("local") { - _cols = cols; - _rows = rows; - _data_idx = 0; - _data = new float[cols*rows]; -} - -void FileLog::log( float value ) { - _data[_data_idx++] = value; -} - -void FileLog::save() { - FILE *fp = fopen("/local/log.txt", "w"); - for( short i=0; i<_data_idx; i++){ - if( i && (i % _cols == 0)) - fprintf( fp, "\r\n"); - else if( i && i != _data_idx-1 ) - fprintf( fp, "\t"); - fprintf( fp, "%.4f", _data[i]); - } - fclose(fp); - - delete [] _data; - _data = NULL; -}