continued sd card manager

bsp_q7s/memory/SdCardManager.cpp

@@ -25,50 +25,90 @@ SdCardManager* SdCardManager::instance() {
 }
 
 ReturnValue_t SdCardManager::switchOnSdCard(sd::SdCard sdCard) {
-    if(sdCardActive(sdCard)) {
-        return ALREADY_ON;
-    }
-    return HasReturnvaluesIF::RETURN_OK;
+//    if(sdCardActive(sdCard)) {
+//        return ALREADY_ON;
+//    }
+    return setSdCardState(sdCard, true);
+
 }
 
 ReturnValue_t SdCardManager::switchOffSdCard(sd::SdCard sdCard) {
-    return HasReturnvaluesIF::RETURN_OK;
+//    if(not sdCardActive(sdCard)) {
+//        return ALREADY_OFF;
+//    }
+    return setSdCardState(sdCard, false);
 }
 
-bool SdCardManager::sdCardActive(sd::SdCard sdCard) {
+ReturnValue_t SdCardManager::setSdCardState(sd::SdCard sdCard, bool on) {
+    std::string sdstring = "";
+    std::string statestring = "";
+    if(sdCard == sd::SdCard::SLOT_0) {
+        sdstring = "0";
+    }
+    else if(sdCard == sd::SdCard::SLOT_1) {
+        sdstring = "1";
+    }
+    if(on) {
+        statestring = "on";
+    }
+    else {
+        statestring = "off";
+    }
+    std::ostringstream command;
+    command << "h7hw sd set " << sdstring << " " << statestring;
+    int result = std::system(command.str().c_str());
+    if(result == 0) {
+        return HasReturnvaluesIF::RETURN_OK;
+    }
+    sif::warning << "SdCardManager::setSdCardState: system call failed with code " <<
+            result << std::endl;
+    return HasReturnvaluesIF::RETURN_FAILED;
+}
+
+ReturnValue_t SdCardManager::sdCardActive(std::pair<bool, bool>& active) {
     using namespace std;
     if(not filesystem::exists("/tmp/sd_status.txt")) {
-        ReturnValue_t result = updateSdCardStateFile();
-        if(result != HasReturnvaluesIF::RETURN_OK) {
-            return result;
-        }
+        return STATUS_FILE_NEXISTS;
     }
 
     // Now the file should exist in any case. Still check whether it exists.
     fstream sdStatus("/tmp/sd_status.txt");
     if (not sdStatus.good()) {
-        return false;
+        return STATUS_FILE_NEXISTS;
     }
     string line;
     uint8_t idx = 0;
+    ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
+    bool on = false;
+
     while (std::getline(sdStatus, line)) {
         istringstream iss(line);
         string word;
-        if((sdCard == sd::SdCard::SLOT_0 and idx == 0) or
-                (sdCard == sd::SdCard::SLOT_1 and idx == 1)) {
-            while(iss >> word) {
-                if(word == "on") {
-                    return true;
-                }
-                else {
-                    return false;
-                }
+        while(iss >> word) {
+            if(word == "on") {
+                on = true;
+            }
+            else if (word == "off") {
+                on = false;
+            }
+            else {
+                continue;
+            }
+            if(idx == 0) {
+                active.first = on;
+            }
+            else if(idx == 1) {
+                active.second = on;
+            }
+            else if(idx > 1) {
+                sif::warning << "SdCardManager::sdCardActive: Status file has more "
+                        "than 2 lines!" << std::endl;
+                return STATUS_FILE_FORMAT_INVALID;
             }
         }
         idx++;
     }
     return HasReturnvaluesIF::RETURN_OK;
-    return false;
 }
 
 sd::SdCard SdCardManager::getPreferredSdCard() const {

bsp_q7s/memory/SdCardManager.h

@@ -7,6 +7,7 @@
 #include "fsfw/returnvalues/HasReturnvaluesIF.h"
 
 #include <cstdint>
+#include <utility>
 
 class MutexIF;
 
@@ -21,6 +22,12 @@ public:
 
     static constexpr ReturnValue_t ALREADY_ON = HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 0);
     static constexpr ReturnValue_t ALREADY_OFF = HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 1);
+    static constexpr ReturnValue_t STATUS_FILE_NEXISTS =
+            HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 2);
+    static constexpr ReturnValue_t STATUS_FILE_FORMAT_INVALID =
+            HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 3);
+    static constexpr ReturnValue_t SYSTEM_CALL_ERROR =
+            HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 4);
 
     virtual ~SdCardManager();
 
@@ -39,14 +46,33 @@ public:
 
     ReturnValue_t switchOffSdCard(sd::SdCard sdCard);
 
-    bool sdCardActive(sd::SdCard sdCard);
+    /**
+     * Updated the state file or creates one if it does not exist. You need to call this
+     * function before calling #sdCardActiv
+     * @return - RETURN_OK if the state file was updated successfully
+     *         - SYSTEM_CALL_ERROR if the call to create the status file failed
+     */
+    ReturnValue_t updateSdCardStateFile();
+
+    /**
+     * Get the state of the SD cards. If the state file does not exist, this function will
+     * take care of updating it. If it does not, the function will use the state file to get
+     * the status of the SD cards and set the field of the provided boolean pair.
+     * @param active Pair of booleans, where the first entry is the state of the first SD card
+     * and the second one the state of the second SD card
+     * @return - RETURN_OK if the state was read successfully
+     *         - STATUS_FILE_FORMAT_INVALID if there was an issue with the state file. The user
+     *           should call #updateSdCardStateFile again in that case
+     *         - STATUS_FILE_NEXISTS if the status file does not exist
+     */
+    ReturnValue_t sdCardActive(std::pair<bool, bool>& active);
 
     sd::SdCard getPreferedSdCard() const;
 
 private:
     SdCardManager();
 
-    ReturnValue_t updateSdCardStateFile();
+    ReturnValue_t setSdCardState(sd::SdCard sdCard, bool on);
 
     sd::SdCard preferredSdCard = sd::SdCard::SLOT_0;
 

bsp_q7s/memory/definitions.h

@@ -5,7 +5,8 @@ namespace sd {
 
 enum SdCard {
     SLOT_0,
-    SLOT_1
+    SLOT_1,
+    BOTH
 };
 
 }