First release

.gitignore

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+.build
+.mbed
+projectfiles
+*.py*
+mbed-os
+BUILD
+
+compile_commands.json
+.clangd
+.cache

main.cpp

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+#include "mbed.h" //mbed-os 6.10 Nucleo-F429ZI
+#include "KVStore.h"
+#include "kvstore_global_api.h"
+#include "FileSystemStore.h"
+
+#define err_code(res) MBED_GET_ERROR_CODE(res)
+
+char            key[] = {"key"};
+size_t          actual_size = 0;
+const size_t    buffer_size = 20;
+char            buffer[buffer_size] = {};
+
+KVStore::info_t info;
+
+KVStore         *kvstore = nullptr;
+FileSystem      *fs = nullptr;
+BlockDevice     *bd = nullptr;
+int res;
+
+int main()
+{
+    printf("Example of KVStore with FileSystem\n");
+
+    fs = FileSystem::get_default_instance();
+
+    printf("Mounting...\n");    
+    if((res = fs->mount(bd))!= 0) printf("fs_mount() error: %d\n", err_code(res));
+    else printf("Mounted\n");
+    /*if (res) {
+        res = fs->reformat(bd);
+        printf("Error: %d (Format)\n ", err_code(res));
+    }*/
+
+    kvstore = new FileSystemStore(fs);
+
+    printf("kv_init()\n");
+    if((res = kvstore->init())!=0) printf("kv_init error: %d (init)\n ", err_code(res));
+
+    printf("kv_get_info of a key\n");
+    if((res = kvstore->get_info(key, &info))!=0) printf("kv_get_info error: %d\n", err_code(res));
+    else printf("kv_get_info key: %s\nkv_get_info info - size: %u, flags: %u\n", key, info.size, info.flags);
+
+    // Press and hold user button and press reset with it, that will call reset and change of value
+    if(DigitalIn(USER_BUTTON).read())
+    {
+        printf("KVStore::reset()\n");
+        kvstore->reset();
+        printf("Please enter a short string!\n");
+        char str[10];
+        scanf("%10s",str); 
+        printf("KVStore::set() - %s\n", str);
+        if ((res = kvstore->set(key, str, strlen(str), 0))!= 0)
+        {
+            printf("KVStore::set() error: %d (set)\n ", err_code(res));
+        }  
+    }
+
+    printf("KVStore::get()\n");
+    if ((res = kvstore->get(key, buffer, buffer_size, &actual_size, 0))!= 0) printf("KVStore::get() error: %d\n", err_code(res));
+    else printf("KVStore::get() - data: %s\n",  buffer);
+
+    printf("Example end!\r\n");
+}
+

mbed-os.lib

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+https://github.com/ARMmbed/mbed-os#9738b27c7df897c29e9769911d6794ba3e5b3f19

mbed_app.json

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+{
+    "target_overrides": {
+        "*": {
+            "platform.stdio-convert-newlines": true,
+            "platform.stdio-baud-rate": 115200,
+            "platform.default-serial-baud-rate": 115200,
+            "mbed-trace.enable": true,
+            "target.printf_lib": "std",
+            "target.default_lib": "std",
+            "target.features_add": ["STORAGE"],
+            "target.components_add":["SD"],
+            "storage.storage_type": "FILESYSTEM"
+        },
+        "NUCLEO_F303RE": {
+            "sd.SPI_MOSI" : "PB_5",
+            "sd.SPI_MISO" : "PB_4",
+            "sd.SPI_CLK"  : "PB_3",
+            "sd.SPI_CS"   : "PA_10"
+        },
+        "NUCLEO_F429ZI": {
+            "sd.SPI_MOSI" : "PB_5",
+            "sd.SPI_MISO" : "PB_4",
+            "sd.SPI_CLK"  : "PB_3",
+            "sd.SPI_CS"   : "PA_4"
+        },
+        "NUCLEO_F767ZI": {
+            "sd.SPI_MOSI" : "PB_5",
+            "sd.SPI_MISO" : "PB_4",
+            "sd.SPI_CLK"  : "PB_3",
+            "sd.SPI_CS"   : "PA_4"
+        },
+        "NUCLEO_L432KC": {
+            "sd.SPI_MOSI" : "PA_7",
+            "sd.SPI_MISO" : "PA_6",
+            "sd.SPI_CLK"  : "PA_5",
+            "sd.SPI_CS"   : "PA_4"
+        }
+    }
+}