Basic working SD card.'

src/storage/sd_manager.cpp

@@ -228,6 +228,115 @@ fs::FS& SDManager::fs()
 }
 
 
+StorageCardType SDManager::cardType() const
+{
+    if (mounted && backend != nullptr)
+    {
+        return backend->cardType();
+    }
+    return StorageCardType::None;
+}
+
+
+const char* SDManager::cardTypeName() const
+{
+    return cardTypeName(cardType());
+}
+
+
+uint64_t SDManager::totalBytes() const
+{
+    if (mounted && backend != nullptr)
+    {
+        return backend->totalBytes();
+    }
+    return 0;
+}
+
+
+uint64_t SDManager::usedBytes() const
+{
+    if (mounted && backend != nullptr)
+    {
+        return backend->usedBytes();
+    }
+    return 0;
+}
+
+
+uint64_t SDManager::freeBytes() const
+{
+    uint64_t total = totalBytes();
+    uint64_t used  = usedBytes();
+    return (total > used) ? (total - used) : 0;
+}
+
+
+uint32_t SDManager::measureWriteSpeed()
+{
+    if (!mounted || backend == nullptr)
+    {
+        return 0;
+    }
+
+    fs::FS& files = backend->fs();
+
+    const char* scratchPath = STORAGE_SPEED_MEASURE_PATH;
+    const size_t bufferSize = 16 * 1024;
+
+    // Remove any leftover from a previous crashed run.
+    files.remove(scratchPath);
+
+    uint8_t* buffer = (uint8_t*)malloc(bufferSize);
+    if (buffer == nullptr)
+    {
+        return 0;
+    }
+
+    memset(buffer, 0xA5, bufferSize);
+
+    File file = files.open(scratchPath, FILE_WRITE);
+    if (!file)
+    {
+        free(buffer);
+        return 0;
+    }
+
+    uint32_t remaining = STORAGE_SPEED_MEASURE_BYTES;
+    uint32_t startUs = micros();
+
+    while (remaining > 0)
+    {
+        size_t toWrite = (remaining < bufferSize) ? remaining : bufferSize;
+        size_t written = file.write(buffer, toWrite);
+
+        if (written == 0)
+        {
+            break;
+        }
+
+        remaining -= written;
+    }
+
+    file.close();
+
+    uint32_t elapsedUs = micros() - startUs;
+    Serial.print("Elapsed microseconds: ");
+    Serial.println(elapsedUs);
+
+    files.remove(scratchPath);
+    free(buffer);
+
+    if (remaining != 0 || elapsedUs == 0)
+    {
+        return 0;
+    }
+
+    uint64_t writtenBytes = (uint64_t)STORAGE_SPEED_MEASURE_BYTES - remaining;
+    return (uint32_t)((writtenBytes * 1000000ULL) / elapsedUs);
+}
+
+
 const char* SDManager::cardTypeName(StorageCardType type)
 {
     switch (type)