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:
- 0:f211f4870371
diff -r 000000000000 -r f211f4870371 FileLog.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FileLog.cpp Mon Oct 15 17:04:49 2012 +0000 @@ -0,0 +1,50 @@ +/* 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; +}