Diff: sdcard.cpp

Revision:

4:48761259552a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sdcard.cpp	Tue Mar 14 14:46:43 2017 +0000
@@ -0,0 +1,66 @@
+/**
+ * Task that logs the state to a file on the SD card in csv format
+ *
+ * Author: Jacob Baungard Hansen
+ */
+
+#include "sdcard_task.h"
+
+/**
+ *
+ * @param starting_offset       when the task should but run first
+ * @param frequency_ms              the frequency in ms of how often the task should run
+* @param state                          pointer to the state object to print
+ */
+SDCardTask::SDCardTask(int starting_offset, int frequency_ms,
+                                                                     State * state)
+                                    : Task(starting_offset, frequency_ms) {
+                                        
+    this->state = state;
+    // mount the file system
+    this->sd = new SDFileSystem(p5, p6, p7, p8, "sd");
+    
+    // set the folder
+    this->folder = "/sd/embedded";
+    
+    // ensure folder exists
+    struct stat s = {0};
+
+    if (!stat(folder.c_str(), &s)) { }
+    else {
+      mkdir(folder.c_str(), 0777); 
+    }
+    
+    // set file to log to
+    this->file.append(folder);
+    file.append("/data.csv");
+    
+    // clear previous data and set headers
+    FILE *fp = fopen(file.c_str(), "w");
+    if(fp == NULL) {
+      error("Could not open file for write\n");
+    }
+    fprintf(fp, "frequency,digital1,digital2,analog1,analog2\n");
+    fclose(fp);
+
+}
+
+SDCardTask::~SDCardTask() {
+    delete this->sd;
+}
+
+void SDCardTask::action() {
+    
+    // ensure file can be opened
+    FILE *fp = fopen(file.c_str(), "a");
+    if(fp == NULL) {
+      error("Could not open file for write\n");
+    }
+    // print current state
+    fprintf(fp, "%d,%d,%d,%f,%f\n", this->state->get_freq(), this->state->get_digital_1(), 
+                                                                this->state->get_digital_2(), this->state->get_avg_analog_1(),
+                                                                this->state->get_avg_analog_2());
+    fclose(fp); 
+    
+    
+}
\ No newline at end of file