Baser Kandehir / Mbed 2 deprecated datalogging_RTC Featured

This program can log data that is read from RTC(real time clock) which is embedded inside LPC1768. It saves the data to the LPC1768’s memory as “log.txt”.

Dependencies:   ledCounter mbed

main.cpp@3:192d65ce0c19, 2015-07-21 (annotated)

Committer:
BaserK
Date:
Tue Jul 21 08:04:41 2015 +0000
Revision:
3:192d65ce0c19
Parent:
2:e51a43447d68 
MIT license is added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
BaserK 0:a5ea226b5b26 1 /* Datalogging with Real Time Clock on LPC1768
BaserK 0:a5ea226b5b26 2 *
BaserK 0:a5ea226b5b26 3 * @author: Baser Kandehir
BaserK 0:a5ea226b5b26 4 * @date: July 8, 2015
BaserK 3:192d65ce0c19 5 * @license: MIT license
BaserK 3:192d65ce0c19 6 *
BaserK 3:192d65ce0c19 7 * Copyright (c) 2015, Baser Kandehir, baser.kandehir@ieee.metu.edu.tr
BaserK 3:192d65ce0c19 8 *
BaserK 3:192d65ce0c19 9 * Permission is hereby granted, free of charge, to any person obtaining a copy
BaserK 3:192d65ce0c19 10 * of this software and associated documentation files (the "Software"), to deal
BaserK 3:192d65ce0c19 11 * in the Software without restriction, including without limitation the rights
BaserK 3:192d65ce0c19 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
BaserK 3:192d65ce0c19 13 * copies of the Software, and to permit persons to whom the Software is
BaserK 3:192d65ce0c19 14 * furnished to do so, subject to the following conditions:
BaserK 3:192d65ce0c19 15 *
BaserK 3:192d65ce0c19 16 * The above copyright notice and this permission notice shall be included in
BaserK 3:192d65ce0c19 17 * all copies or substantial portions of the Software.
BaserK 3:192d65ce0c19 18 *
BaserK 3:192d65ce0c19 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
BaserK 3:192d65ce0c19 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
BaserK 3:192d65ce0c19 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
BaserK 3:192d65ce0c19 22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
BaserK 3:192d65ce0c19 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
BaserK 3:192d65ce0c19 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
BaserK 3:192d65ce0c19 25 * THE SOFTWARE.
BaserK 3:192d65ce0c19 26 *
BaserK 0:a5ea226b5b26 27 * @description of the program:
BaserK 2:e51a43447d68 28 *
BaserK 2:e51a43447d68 29 * This program can log data that is read from RTC(real time clock) which
BaserK 2:e51a43447d68 30 * is embedded inside LPC1768. It saves the data to the LPC1768’s memory as
BaserK 2:e51a43447d68 31 * “log.txt”. For this example program, the data is how many times the button
BaserK 2:e51a43447d68 32 * is pressed and when it is pressed in terms of real time. It can also
BaserK 2:e51a43447d68 33 * display the button count as 4-bit binary number using 4 leds on the LPC1768.
BaserK 2:e51a43447d68 34 * There are two different time settings on the code. One can set the time from
BaserK 2:e51a43447d68 35 * the terminal or manually by uncommenting the corresponding portion of code.
BaserK 2:e51a43447d68 36 * Once the time is set, if there is a battery connected to real-time clock,
BaserK 2:e51a43447d68 37 * RTC will continue to keep track of current time. In order not to reset the
BaserK 2:e51a43447d68 38 * real-time to its initial value every time microcontroller is reset, it is
BaserK 2:e51a43447d68 39 * neccessary to set the time once and delete the portion of code which sets
BaserK 2:e51a43447d68 40 * the time and keep the rest.
BaserK 0:a5ea226b5b26 41 *
BaserK 0:a5ea226b5b26 42 * @connections:
BaserK 0:a5ea226b5b26 43 *--------------------------------------------------------------
BaserK 2:e51a43447d68 44 * |LPC1768| |Peripherals|
BaserK 0:a5ea226b5b26 45 * Pin 13 --------> (TX) RX pin of the FTDI or Bluetooth etc.
BaserK 0:a5ea226b5b26 46 * Pin 14 --------> (RX) TX pin of the FTDI or Bluetooth etc.
BaserK 0:a5ea226b5b26 47 * Pin 20 --------> Pull-up connected button
BaserK 0:a5ea226b5b26 48 * GND -----------> GND of any peripheral
BaserK 0:a5ea226b5b26 49 * VOUT (3.3 V) --> Pull-up resistor
BaserK 0:a5ea226b5b26 50 *---------------------------------------------------------------
BaserK 0:a5ea226b5b26 51 *
BaserK 0:a5ea226b5b26 52 */
BaserK 0:a5ea226b5b26 53
BaserK 0:a5ea226b5b26 54 #include "mbed.h"
BaserK 0:a5ea226b5b26 55 #include "ledCounter.h"
BaserK 0:a5ea226b5b26 56
BaserK 0:a5ea226b5b26 57 Serial ftdi(p13, p14); // setup terminal link
BaserK 0:a5ea226b5b26 58 LocalFileSystem local("local"); // define local file system
BaserK 0:a5ea226b5b26 59 DigitalIn button(p20); // pull-up button is connected to p20
BaserK 0:a5ea226b5b26 60
BaserK 0:a5ea226b5b26 61 int count=0; // button count
BaserK 0:a5ea226b5b26 62 struct tm t; // current time will be stored here
BaserK 0:a5ea226b5b26 63
BaserK 0:a5ea226b5b26 64 int main()
BaserK 0:a5ea226b5b26 65 {
BaserK 0:a5ea226b5b26 66 /* UNCOMMENT BELOW if you want to set the time from the terminal. */
BaserK 0:a5ea226b5b26 67 /*
BaserK 0:a5ea226b5b26 68 ftdi.printf("Enter current date and time:\r\n");
BaserK 0:a5ea226b5b26 69 ftdi.printf("YYYY MM DD HH MM SS[enter]\r\n\r\n");
BaserK 0:a5ea226b5b26 70 ftdi.scanf("%d %d %d %d %d %d", &t.tm_year, &t.tm_mon, &t.tm_mday, &t.tm_hour, &t.tm_min, &t.tm_sec);
BaserK 0:a5ea226b5b26 71 ftdi.printf("-------------------------- \r\n");
BaserK 0:a5ea226b5b26 72
BaserK 0:a5ea226b5b26 73 t.tm_year = t.tm_year - 1900; // adjust for tm structure required values
BaserK 0:a5ea226b5b26 74 t.tm_mon = t.tm_mon - 1;
BaserK 0:a5ea226b5b26 75
BaserK 0:a5ea226b5b26 76 set_time(mktime(&t)); // set the time
BaserK 0:a5ea226b5b26 77 */
BaserK 0:a5ea226b5b26 78
BaserK 0:a5ea226b5b26 79 /* UNCOMMENT BELOW if you want to set time manually */
BaserK 0:a5ea226b5b26 80 /*
BaserK 0:a5ea226b5b26 81 t.tm_year = 2015; // current year
BaserK 0:a5ea226b5b26 82 t.tm_mon = 7; // current month
BaserK 0:a5ea226b5b26 83 t.tm_mday = 7; // current day
BaserK 0:a5ea226b5b26 84 t.tm_hour = 15; // current hour
BaserK 0:a5ea226b5b26 85 t.tm_min = 16; // current minute
BaserK 0:a5ea226b5b26 86 t.tm_sec = 0; // current second
BaserK 0:a5ea226b5b26 87
BaserK 0:a5ea226b5b26 88 t.tm_year = t.tm_year - 1900; // adjust for tm structure required values
BaserK 0:a5ea226b5b26 89 t.tm_mon = t.tm_mon - 1;
BaserK 0:a5ea226b5b26 90
BaserK 0:a5ea226b5b26 91 set_time(mktime(&t)); // set the time
BaserK 0:a5ea226b5b26 92 */
BaserK 0:a5ea226b5b26 93
BaserK 0:a5ea226b5b26 94 /* Once the time is set, if there is a battery (3V) connected to VB pin and GND, RTC will remember the exact time. */
BaserK 0:a5ea226b5b26 95
BaserK 0:a5ea226b5b26 96 while(1)
BaserK 0:a5ea226b5b26 97 {
BaserK 0:a5ea226b5b26 98 time_t seconds = time(NULL);
BaserK 0:a5ea226b5b26 99
BaserK 0:a5ea226b5b26 100 if(button.read()==0) // if the button is pressed
BaserK 0:a5ea226b5b26 101 {
BaserK 0:a5ea226b5b26 102 while(button.read()==0); // wait until release
BaserK 0:a5ea226b5b26 103 wait_ms(20); // button debounce
BaserK 0:a5ea226b5b26 104 count++; // count up
BaserK 0:a5ea226b5b26 105
BaserK 0:a5ea226b5b26 106 FILE* Logfile = fopen ("/local/log.txt","a"); // open file for appending
BaserK 0:a5ea226b5b26 107
BaserK 0:a5ea226b5b26 108 ftdi.printf("Time: %s \rButton count: %d \r\n",ctime(&seconds),count); // send data to terminal
BaserK 0:a5ea226b5b26 109 ftdi.printf("-------------------------- \r\n");
BaserK 0:a5ea226b5b26 110
BaserK 0:a5ea226b5b26 111 fprintf(Logfile, "Time: %s \rButton count: %d \r\n",ctime(&seconds),count); // save data to log.txt file
BaserK 0:a5ea226b5b26 112 fprintf(Logfile, "-------------------------- \r\n");
BaserK 0:a5ea226b5b26 113 fclose(Logfile);
BaserK 0:a5ea226b5b26 114 }
BaserK 0:a5ea226b5b26 115 ledCounter(count); // display the count as binary
BaserK 0:a5ea226b5b26 116 }
BaserK 0:a5ea226b5b26 117 }