SD 09: IndexOf pattern

This example shows how to turn on the SD card. Write a file with some lines. Then show how to find patterns inside the file.

Required Materials

1 x Waspmote 1 x Battery 1 x SD card 1 x MiniUSB wire

Notes

- Remember that only 8.3 SHORT FILE NAME are valid for files and directories - Make sure Waspmote is switched off before inserting or removing the SD card. Otherwise, the SD card could be damaged. - Waspmote must not be switched off or reseted while there are ongoing read or write operations in the SD card. Otherwise, the SD card could be damaged and data could be lost. If you suspect that there may be some ongoing SD operations, wait a while until they are completed. - This example can be executed in Waspmote v12 and Waspmote v15

Code

/*  
 *  ------ [SD_09] - Index Of a pattern inside SD file -------- 
 *  
 *  Explanation: Turn on the SD card. Write a file with some lines.
 *  Then show how to find patterns inside the file.
 *
 *  Copyright (C) 2016 Libelium Comunicaciones Distribuidas S.L. 
 *  http://www.libelium.com 
 *  
 *  This program is free software: you can redistribute it and/or modify 
 *  it under the terms of the GNU General Public License as published by 
 *  the Free Software Foundation, either version 3 of the License, or 
 *  (at your option) any later version. 
 *  
 *  This program is distributed in the hope that it will be useful, 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 *  GNU General Public License for more details. 
 *  
 *  You should have received a copy of the GNU General Public License 
 *  along with this program.  If not, see . 
 *  
 *  Version:           3.0
 *  Design:            David Gascón 
 *  Implementation:    Yuri Carmona
 */

// define file name to be created: MUST be 8.3 SHORT FILE NAME
char file[]="FILE9.TXT";

uint8_t sd_answer;


void setup()
{
  // open USB port
  USB.ON();
  USB.println(F("SD_09 example"));

  // Set SD ON
  SD.ON();
  
  // delete file
  sd_answer = SD.del(file);

  // create file
  sd_answer = SD.create(file);
  
  // Append data to file
  if(SD.appendln(file,"abcdefghijklmnopqrstuvwxyz0123456789")) USB.println("append ok");
  if(SD.appendln(file,"abcdefghijklmnopqrstuvwxyz0123456789")) USB.println("append ok");
  if(SD.appendln(file,"abcdefghijklmnopqrstuvwxyz0123456789")) USB.println("append ok");
  if(SD.appendln(file,"abcdefghijklmnopqrstuvwxyz0123456789")) USB.println("append ok");
  if(SD.appendln(file,"abcdefghijklmnopqrstuvwxyz0123456789")) USB.println("append ok");
  
  USB.println(F("-------------------"));
  USB.print(F("Show file:"));
  SD.showFile(file);
  delay(1000);

}


void loop()
{ 
  ///////////////////////////////////////////////    
  // 1 - index of 'abcdef' with offset=0 bytes
  ///////////////////////////////////////////////
  USB.print(F("indexOf 'abcdef' (offset=0): "));
  USB.println(SD.indexOf(file,"abcdef",0));  

  ///////////////////////////////////////////////  
  // 2 - index of 'abcedf' with offset=0 bytes
  ///////////////////////////////////////////////
  USB.print(F("indexOf 'abcedf' (offset=0): "));
  USB.println(SD.indexOf(file,"abcedf",0));

  ///////////////////////////////////////////////    
  // 3 - index of '0123' with offset=0 bytes 
  ///////////////////////////////////////////////
  USB.print(F("indexOf '0123' (offset=0): "));
  USB.println(SD.indexOf(file,"0123",0));

  ///////////////////////////////////////////////  
  // 4 - index of '999' with offset=0 bytes 
  ///////////////////////////////////////////////
  USB.print(F("indexOf '999' (offset=0): "));
  USB.println(SD.indexOf(file,"999",0));

  ///////////////////////////////////////////////  
  // 5 - index of 'abcd' with offset=1 byte 
  ///////////////////////////////////////////////
  USB.print(F("indexOf 'abcd'(offset=1): "));
  USB.println(SD.indexOf(file,"abcd",1));  

  ///////////////////////////////////////////////  
  // 6 - index of '0123' with offset=27 bytes   
  ///////////////////////////////////////////////
  USB.print(F("indexOf '0123' (offset=27): "));
  USB.println(SD.indexOf(file,"0123",27));

  ///////////////////////////////////////////////
  // 7 - index of 'bc' with offset=0 bytes   
  ///////////////////////////////////////////////
  USB.print(F("indexOf 'bc' (offset=0): "));
  USB.println(SD.indexOf(file,"bc",0));

  /////////////////////////////////////////////// 
  // 8 - index of 'cb' with offset=0 bytes    
  ///////////////////////////////////////////////
  USB.print(F("indexOf 'cb' (offset=0): "));
  USB.println(SD.indexOf(file,"cb",0));
 
  USB.println(F("-----------------------------"));
  delay(10000);
}

Output

H#
 SD_09 example
 append ok
 append ok
 append ok
 append ok
 append ok
 -------------------
 Show file:
 -------------------
 abcdefghijklmnopqrstuvwxyz0123456789
 abcdefghijklmnopqrstuvwxyz0123456789
 abcdefghijklmnopqrstuvwxyz0123456789
 abcdefghijklmnopqrstuvwxyz0123456789
 abcdefghijklmnopqrstuvwxyz0123456789
 -------------------
 indexOf 'abcdef' (offset=0): 0
 indexOf 'abcedf' (offset=0): -1
 indexOf '0123' (offset=0): 26
 indexOf '999' (offset=0): -1
 indexOf 'abcd'(offset=1): 36
 indexOf '0123' (offset=27): 36
 indexOf 'bc' (offset=0): 1
 indexOf 'cb' (offset=0): -1
 -----------------------------
 indexOf 'abcdef' (offset=0): 0
 indexOf 'abcedf' (offset=0): -1
 indexOf '0123' (offset=0): 26
 indexOf '999' (offset=0): -1
 indexOf 'abcd'(offset=1): 36
 indexOf '0123' (offset=27): 36
 indexOf 'bc' (offset=0): 1
 indexOf 'cb' (offset=0): -1
 -----------------------------

Last updated 3 years ago