Xavier Gouesnard / Mbed 2 deprecated Assignment_2_XG

Test session

Dependencies:   FatFileSystem MCP23017 WattBob_TextLCD mbed

Fork of Assignment_2_herpe by Xavier Herpe

sdcard.cpp@4:48761259552a, 2017-03-14 (annotated)

Committer:
xouf2114
Date:
Tue Mar 14 14:46:43 2017 +0000
Revision:
4:48761259552a
Test of Assignment 2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
xouf2114 4:48761259552a 1 /**
xouf2114 4:48761259552a 2 * Task that logs the state to a file on the SD card in csv format
xouf2114 4:48761259552a 3 *
xouf2114 4:48761259552a 4 * Author: Jacob Baungard Hansen
xouf2114 4:48761259552a 5 */
xouf2114 4:48761259552a 6
xouf2114 4:48761259552a 7 #include "sdcard_task.h"
xouf2114 4:48761259552a 8
xouf2114 4:48761259552a 9 /**
xouf2114 4:48761259552a 10 *
xouf2114 4:48761259552a 11 * @param starting_offset when the task should but run first
xouf2114 4:48761259552a 12 * @param frequency_ms the frequency in ms of how often the task should run
xouf2114 4:48761259552a 13 * @param state pointer to the state object to print
xouf2114 4:48761259552a 14 */
xouf2114 4:48761259552a 15 SDCardTask::SDCardTask(int starting_offset, int frequency_ms,
xouf2114 4:48761259552a 16 State * state)
xouf2114 4:48761259552a 17 : Task(starting_offset, frequency_ms) {
xouf2114 4:48761259552a 18
xouf2114 4:48761259552a 19 this->state = state;
xouf2114 4:48761259552a 20 // mount the file system
xouf2114 4:48761259552a 21 this->sd = new SDFileSystem(p5, p6, p7, p8, "sd");
xouf2114 4:48761259552a 22
xouf2114 4:48761259552a 23 // set the folder
xouf2114 4:48761259552a 24 this->folder = "/sd/embedded";
xouf2114 4:48761259552a 25
xouf2114 4:48761259552a 26 // ensure folder exists
xouf2114 4:48761259552a 27 struct stat s = {0};
xouf2114 4:48761259552a 28
xouf2114 4:48761259552a 29 if (!stat(folder.c_str(), &s)) { }
xouf2114 4:48761259552a 30 else {
xouf2114 4:48761259552a 31 mkdir(folder.c_str(), 0777);
xouf2114 4:48761259552a 32 }
xouf2114 4:48761259552a 33
xouf2114 4:48761259552a 34 // set file to log to
xouf2114 4:48761259552a 35 this->file.append(folder);
xouf2114 4:48761259552a 36 file.append("/data.csv");
xouf2114 4:48761259552a 37
xouf2114 4:48761259552a 38 // clear previous data and set headers
xouf2114 4:48761259552a 39 FILE *fp = fopen(file.c_str(), "w");
xouf2114 4:48761259552a 40 if(fp == NULL) {
xouf2114 4:48761259552a 41 error("Could not open file for write\n");
xouf2114 4:48761259552a 42 }
xouf2114 4:48761259552a 43 fprintf(fp, "frequency,digital1,digital2,analog1,analog2\n");
xouf2114 4:48761259552a 44 fclose(fp);
xouf2114 4:48761259552a 45
xouf2114 4:48761259552a 46 }
xouf2114 4:48761259552a 47
xouf2114 4:48761259552a 48 SDCardTask::~SDCardTask() {
xouf2114 4:48761259552a 49 delete this->sd;
xouf2114 4:48761259552a 50 }
xouf2114 4:48761259552a 51
xouf2114 4:48761259552a 52 void SDCardTask::action() {
xouf2114 4:48761259552a 53
xouf2114 4:48761259552a 54 // ensure file can be opened
xouf2114 4:48761259552a 55 FILE *fp = fopen(file.c_str(), "a");
xouf2114 4:48761259552a 56 if(fp == NULL) {
xouf2114 4:48761259552a 57 error("Could not open file for write\n");
xouf2114 4:48761259552a 58 }
xouf2114 4:48761259552a 59 // print current state
xouf2114 4:48761259552a 60 fprintf(fp, "%d,%d,%d,%f,%f\n", this->state->get_freq(), this->state->get_digital_1(),
xouf2114 4:48761259552a 61 this->state->get_digital_2(), this->state->get_avg_analog_1(),
xouf2114 4:48761259552a 62 this->state->get_avg_analog_2());
xouf2114 4:48761259552a 63 fclose(fp);
xouf2114 4:48761259552a 64
xouf2114 4:48761259552a 65
xouf2114 4:48761259552a 66 }