diff --git a/.platformio/platforms/at32/builder/frameworks/_bare.py b/.platformio/platforms/at32/builder/frameworks/_bare.py
index b35a0af..3a1b88f 100644
--- a/.platformio/platforms/at32/builder/frameworks/_bare.py
+++ b/.platformio/platforms/at32/builder/frameworks/_bare.py
@@ -24,7 +24,7 @@ env.Append(
     ASFLAGS=["-x", "assembler-with-cpp"],
 
     CCFLAGS=[
-        "-Os",  # optimize for size
+        "-O3",  # optimize for size
         "-ffunction-sections",  # place each function in its own section
         "-fdata-sections",
         "-Wall",
@@ -41,7 +41,7 @@ env.Append(
     ],
 
     LINKFLAGS=[
-        "-Os",
+        "-O3",
         "-Wl,--gc-sections,--relax",
         "-mthumb",
     ],
@@ -50,14 +50,15 @@ env.Append(
 )
 
 #Floating point unit: hard (hardware) | softfp (software)
-if (
-    any(cpu in board_config.get("build.cpu") for cpu in ("cortex-m4"))
-):
-    env.Append(
-        CFLAGS=["-mfpu=fpv4-sp-d16", "-mfloat-abi=hard"],
-        CCFLAGS=["-mfpu=fpv4-sp-d16", "-mfloat-abi=hard"],
-        LINKFLAGS=["-mfpu=fpv4-sp-d16", "-mfloat-abi=hard"],
-    )
+
+#if (
+#    any(cpu in board_config.get("build.cpu") for cpu in ("cortex-m4"))
+#):
+#    env.Append(
+#        CFLAGS=["-mfpu=fpv4-sp-d16", "-mfloat-abi=hard"],
+#        CCFLAGS=["-mfpu=fpv4-sp-d16", "-mfloat-abi=hard"],
+#        LINKFLAGS=["-mfpu=fpv4-sp-d16", "-mfloat-abi=hard", "-u _printf_float"],
+#    )
 
 if "BOARD" in env:
     env.Append(
diff --git a/.platformio/platforms/at32/builder/frameworks/cmsis.py b/.platformio/platforms/at32/builder/frameworks/cmsis.py
index 1935474..1a78486 100644
--- a/.platformio/platforms/at32/builder/frameworks/cmsis.py
+++ b/.platformio/platforms/at32/builder/frameworks/cmsis.py
@@ -45,10 +45,8 @@ assert product_line, "Missing MCU or Product Line field"
 print("-------------------------------------------------------------------------------");
 print("AT32 PlatformIO porting by MartinLoren®");
 print("-------------------------------------------------------------------------------");
-print("Version: 2024-12");
+print("Version: 2025-05");
 
-#env.SConscript("_bare.py")
-#print("framework: "+"framework-cmsis-" + mcu[0:8]);
 
 CMSIS_DIR = platform.get_package_dir("framework-cmsis")
 if mcu.startswith("at32f43"):
@@ -56,13 +54,20 @@ if mcu.startswith("at32f43"):
 else:
     CMSIS_DEVICE_DIR = platform.get_package_dir("framework-cmsis-" + mcu[0:8])
 LDSCRIPTS_DIR = platform.get_package_dir("tool-ldscripts-at32")
+#CMSIS_DIR = platform.get_package_dir("framework-cmsis")
+#CMSIS_DEVICE_DIR = platform.get_package_dir("framework-cmsis-" + mcu[0:7])
+#LDSCRIPTS_DIR = join('%s' % platform.get_dir() or "", "ldscripts")
 print("Environment:");
 print("     CMSIS_DIR: "+CMSIS_DIR);
 print("     CMSIS_DEVICE_DIR: "+CMSIS_DEVICE_DIR);
 print("     LDSCRIPTS_DIR: "+LDSCRIPTS_DIR);
 assert all(os.path.isdir(d) for d in (CMSIS_DIR, CMSIS_DEVICE_DIR, LDSCRIPTS_DIR))
 
+
+#env.SConscript("_bare.py")
 #build_script = "_bare.py"
+
+#build_script = join(env.PioPlatform().get_package_dir("framework-cmsis-" + mcu[0:7]), "tools", "platformio", "platformio-build.py")
 build_script = join(CMSIS_DEVICE_DIR, "tools", "platformio", "platformio-build.py")
 if not isfile(build_script):
     sys.stderr.write("Error: Missing PlatformIO build script %s!\n" % build_script)
@@ -71,9 +76,6 @@ if not isfile(build_script):
 SConscript(build_script)
 
 
-
-
-
 def generate_ldscript(default_ldscript_path):
     ram = board.get("upload.maximum_ram_size", 0)
     flash = board.get("upload.maximum_size", 0)
@@ -93,9 +95,9 @@ def generate_ldscript(default_ldscript_path):
 def get_linker_script():
     ldscript_match = glob.glob(os.path.join(
         LDSCRIPTS_DIR, mcu[0:7], mcu[0:11].upper() + "*_FLASH.ld"))
-    #print(os.path.join(LDSCRIPTS_DIR, mcu[0:7], mcu[0:11].upper() + "*_FLASH.ld"))
-
+    
     if ldscript_match and os.path.isfile(ldscript_match[0]):
+        print("LD Script file: " +ldscript_match[0])
         return ldscript_match[0]
 
     default_ldscript = os.path.join(
@@ -111,7 +113,7 @@ def get_linker_script():
 
 
 def prepare_startup_file(src_path):
-    startup_file = os.path.join(src_path, "gcc", "startup_%s.S" % product_line.lower())
+    startup_file = os.path.join(src_path, "gcc", "startup_%s.s" % product_line.lower())
     print("Startup file: " + startup_file)
     # Change file extension to uppercase:
     if not os.path.isfile(startup_file) and os.path.isfile(startup_file[:-2] + ".s"):
diff --git a/.platformio/platforms/at32/builder/main.py b/.platformio/platforms/at32/builder/main.py
index 30b2483..d121037 100644
--- a/.platformio/platforms/at32/builder/main.py
+++ b/.platformio/platforms/at32/builder/main.py
@@ -235,13 +235,14 @@ elif upload_protocol == "serial":
         __configure_upload_port=__configure_upload_port,
         UPLOADER=join(
             '%s' % platform.get_dir() or "",
-            "tools", "stm32flash", "stm32flash"),
+            "tools", "at32flash", "at32flash"),
         UPLOADERFLAGS=[
             "-g", board.get("upload.offset_address", "0x08000000"),
             "-b", env.subst("$UPLOAD_SPEED") or "115200", "-w"
         ],
         UPLOADCMD='"$UPLOADER" $UPLOADERFLAGS $SOURCE ${__configure_upload_port(__env__)}'
     )
+    #print(env.subst("$UPLOADCMD"))
 
     upload_actions = [
         env.VerboseAction(env.AutodetectUploadPort, "Looking for upload port..."),
diff --git a/.platformio/platforms/at32/platform.json b/.platformio/platforms/at32/platform.json
index 797a9a5..efcd0ee 100644
--- a/.platformio/platforms/at32/platform.json
+++ b/.platformio/platforms/at32/platform.json
@@ -18,7 +18,7 @@
     "type": "git",
     "url": "https://github.com/platformio/platform-at32.git"
   },
-  "version": "1.0.1",
+  "version": "1.0.2",
   "frameworks": {
     "cmsis": {
       "package": "framework-cmsis",
@@ -71,7 +71,7 @@
       "optional": false,
       "owner": "martinloren",
       "version": "https://github.com/martinloren/framework-cmsis-at32f43x.git"
-    },    
+    },   
     "tool-openocd": {
       "type": "uploader",
       "optional": true,