diff --git a/GDI-4ch/firmware/persistence.cpp b/GDI-4ch/firmware/persistence.cpp
index 0ff519c..79b9d36 100644
--- a/GDI-4ch/firmware/persistence.cpp
+++ b/GDI-4ch/firmware/persistence.cpp
@@ -20,12 +20,27 @@ uint8_t mfs_buffer[512];
 void InitFlash() {
   mfsObjectInit(&mfs1);
   mfs_error_t err = mfsStart(&mfs1, &mfscfg1);
-  // assert(err == MFS_NO_ERROR, "initialization error with erased flash");
+//  chDbgAssert(err == MFS_NO_ERROR, "initialization error with erased flash");
 
 }
 
 mfs_error_t readErr;
 mfs_error_t writeErr;
+
+/*
+extern GDIConfiguration configuration;
+
+void ReadOrDefault() {
+    size_t size = sizeof(GDIConfiguration);
+    mfs_error_t err = mfsReadRecord(&mfs1, 1, &size, (uint8_t*)&configuration);
+    if (err == MFS_NO_ERROR && configuration.version == PERSISTENCE_VERSION) {
+        return;
+    } else {
+        configuration.resetToDefaults();
+    }
+}
+*/
+
 int IncAndGet() {
   size_t size = sizeof mfs_buffer;
   readErr = mfsReadRecord(&mfs1, 1, &size, mfs_buffer);
@@ -41,3 +56,11 @@ int IncAndGet() {
   writeErr = mfsWriteRecord(&mfs1, 1, sizeof mfs_buffer, mfs_buffer);
   return result;
 }
+
+uint16_t float2short100(float value) {
+    return FIXED_POINT * value;
+}
+
+float short2float100(uint16_t value) {
+    return value / 1.0 / FIXED_POINT;
+}