README.md

@@ -576,7 +576,7 @@ When using Eclipse, there are two special build variables in the project propert
 the sysroot path in those variables to get any additional includes like `gpiod.h` in the 
 Eclipse indexer.
 
-# Q7S Utilities
+# Q7S Utilities and Troubleshooting
 
 ## Creating files with cat and echo
 
@@ -591,6 +591,17 @@ cat /tmp/test.txt
 
 For more useful combinations, see this [link](https://www.freecodecamp.org/news/the-cat-command-in-linux-how-to-create-a-text-file-with-cat-or-touch/).
 
+## Using `system` when debugging
+
+Please note that when using a `system` call in C++/C code and debugging, a new thread will be
+spawned which will appear on the left in Eclipse or Xilinx SDK as a `sh` program. 
+The debugger might attach to this child process automatically, depending on debugger configuration,
+and the process needs to be selected and continued/started manually. You can enable or disable
+this behaviour by selecting or deselecting the `Attach Process Children` option in the Remote
+Application Configuration for the TCF plugin like shown in the following picture
+
+<img src="https://egit.irs.uni-stuttgart.de/eive/eive-obsw/raw/branch/develop/doc/img/ProcessSettings.png" width="50%"> <br>
+
 ## Libgpiod
 
 Detect all gpio device files:
@@ -666,9 +677,10 @@ candump can0
 ## Useful Q7S Linux Commands
 
 Rebooting currently running image:
-````
+
+```sh
 xsc_boot_copy -r
-````
+```
 
 # Running the EIVE OBSW on a Raspberry Pi
 

bsp_q7s/boardtest/Q7STestTask.cpp

@@ -1,6 +1,8 @@
 #include "Q7STestTask.h"
+
 #include "fsfw/timemanager/Stopwatch.h"
 #include "fsfw/tasks/TaskFactory.h"
+
 #include <iostream>
 #include <fstream>
 #include <cstdio>
@@ -16,10 +18,27 @@ ReturnValue_t Q7STestTask::performOneShotAction() {
 void Q7STestTask::sdCardTests() {
     using namespace std;
     Stopwatch stopwatch;
-    ofstream testFile("/tmp/test.txt");
-    testFile << "Hallo Welt" << endl;
-    testFile.close();
-    //FILE* testFile = popen("q7hw sd info all", "r");
+    int result = std::system("q7hw sd info all > /tmp/sd_status.txt");
+    if(result != 0) {
+        sif::debug << "system call failed with " << result << endl;
+    }
+    ifstream sdStatus("/tmp/sd_status.txt");
+    string line;
+    uint8_t idx = 0;
+    while (std::getline(sdStatus, line)) {
+        std::istringstream iss(line);
+        string word;
+        while(iss >> word) {
+            if(word == "on") {
+                sif::info << "SD card " << static_cast<int>(idx) << " is on" << endl;
+            }
+            else if(word == "off") {
+                sif::info << "SD card " << static_cast<int>(idx) << " is off" << endl;
+            }
+        }
+        idx++;
+    }
+    std::remove("/tmp/sd_status.txt");
     //TaskFactory::delayTask(3000);
     //int result = system();
     //std::fstream fs(testFile);
@@ -43,3 +62,13 @@ void Q7STestTask::sdCardTests() {
 //    system("q7hw sd set 0 off > /tmp/sd_set.txt");
 //    stopwatch.stop(true);
 }
+
+void Q7STestTask::fileTests() {
+	using namespace std;
+    ofstream testFile("/tmp/test.txt");
+    testFile << "Hallo Welt" << endl;
+    testFile.close();
+
+    system("echo \"Hallo Welt\" > /tmp/test2.txt");
+    system("echo \"Hallo Welt\"");
+}

bsp_q7s/boardtest/Q7STestTask.h

@@ -10,6 +10,7 @@ private:
     ReturnValue_t performOneShotAction() override;
 
     void sdCardTests();
+    void fileTests();
 };