diff --git a/mik32_eeprom.py b/mik32_eeprom.py
index e839a67..523f67a 100644
--- a/mik32_eeprom.py
+++ b/mik32_eeprom.py
@@ -152,7 +152,7 @@ def eeprom_write_page(openocd: OpenOcdTclRpc, address:int, data:list[int]):
     openocd.write_word(EEPROM_REGS_EECON, (1 << EEPROM_EX_S) | (1 << EEPROM_BWE_S) | (EEPROM_OP_PR << EEPROM_OP_S))
     time.sleep(0.001)
 
-def eeprom_check_data_apb(openocd: OpenOcdTclRpc, words: list[int]):
+def eeprom_check_data_apb(openocd: OpenOcdTclRpc, words: list[int]) -> int:
     print("EEPROM check through APB...")
     openocd.write_word(EEPROM_REGS_EEA, 0x00000000)
     word_num = 0
@@ -162,6 +162,7 @@ def eeprom_check_data_apb(openocd: OpenOcdTclRpc, words: list[int]):
         value:int = openocd.read_word(EEPROM_REGS_EEDAT)
         if words[word_num] != value:
             print(f"Unexpect value at {word_num} word, expect {word:#0x}, get {value:#0x}")
+            return 1
         word_num += 1
         curr_progress = int((word_num * 50) / len(words))
         if curr_progress > progress:
@@ -169,8 +170,9 @@ def eeprom_check_data_apb(openocd: OpenOcdTclRpc, words: list[int]):
             progress = curr_progress
     print("]")
     print("EEPROM check through APB done!")
+    return 0
 
-def eeprom_check_data_ahb_lite(openocd: OpenOcdTclRpc, words: list[int]):
+def eeprom_check_data_ahb_lite(openocd: OpenOcdTclRpc, words: list[int]) -> int:
     print("EEPROM check through AHB-Lite...")
     mem_array = openocd.read_memory(0x01000000, 32, len(words))
     if len(words) != len(mem_array):
@@ -181,15 +183,17 @@ def eeprom_check_data_ahb_lite(openocd: OpenOcdTclRpc, words: list[int]):
         if words[word_num] != mem_array[word_num]:
             print(f"Unexpect value at {word_num} word, expect {words[word_num]:#0x}, \
             get {mem_array[word_num]:#0x}")
+            return 1
         curr_progress = int((word_num * 50) / len(words))
         if curr_progress > progress:
             print("#"*(curr_progress - progress), end="", flush=True)
             progress = curr_progress
     print("]")
     print("EEPROM check through APB done!")
+    return 0
 
 
-def write_words(words: list[int], write_by_word = False, read_through_apb = False):
+def write_words(words: list[int], write_by_word = False, read_through_apb = False) -> int:
     """
     Write words in MIK32 EEPROM through APB bus
 
@@ -242,8 +246,10 @@ def write_words(words: list[int], write_by_word = False, read_through_apb = Fals
             eeprom_write_page(openocd, page_num*page_size*4, page)
         print("]")
         if read_through_apb:
-            eeprom_check_data_apb(openocd, words)
+            result = eeprom_check_data_apb(openocd, words)
         else:
-            eeprom_check_data_ahb_lite(openocd, words)
+            result = eeprom_check_data_ahb_lite(openocd, words)
         openocd.resume(0)
-    print("EEPROM write file done!")
+    if result == 0:
+        print("EEPROM write file done!")
+    return result
diff --git a/mik32_spifi.py b/mik32_spifi.py
index bc7fb46..66db989 100644
--- a/mik32_spifi.py
+++ b/mik32_spifi.py
@@ -396,7 +396,7 @@ def spifi_page_program(openocd: OpenOcdTclRpc, ByteAddress: int, data: list[int]
                        (byte_count << SPIFI_CONFIG_CMD_DATALEN_S))
     for i in range(ByteAddress, ByteAddress + byte_count, 1):
         # openocd.write_word(SPIFI_CONFIG_DATA32, data[i+ByteAddress])
-        print(data[i])
+        # print(data[i])
         openocd.write_memory(SPIFI_CONFIG_DATA32, 8, [data[i]])
     # spifi_intrq_clear(openocd)
     openocd.write_word(SPIFI_CONFIG_STAT, openocd.read_word(
diff --git a/mik32_upload.py b/mik32_upload.py
index d88e8cc..5ab1fd3 100644
--- a/mik32_upload.py
+++ b/mik32_upload.py
@@ -32,7 +32,7 @@ def test_connection():
         raise Exception("ERROR: no regs found, check MCU connection")
 
 
-def upload_file(filename: str, boot_source: str = "eeprom"):
+def upload_file(filename: str, boot_source: str = "eeprom") -> int:
     """
     Write ihex or binary file into MIK32 EEPROM or external flash memory
 
@@ -53,17 +53,21 @@ def upload_file(filename: str, boot_source: str = "eeprom"):
         print("ERROR: File %s does not exist" % filename)
         exit(1)
 
-    cmd = shlex.split("%s -s %s -f interface/ftdi/m-link.cfg -f target/mcu32.cfg" % (DEFAULT_OPENOCD_EXEC_FILE_PATH, DEFAULT_OPENOCD_SCRIPTS_PATH), posix=0)
+    cmd = shlex.split("%s -s %s -f interface/ftdi/m-link.cfg -f target/mcu32.cfg" % (DEFAULT_OPENOCD_EXEC_FILE_PATH, DEFAULT_OPENOCD_SCRIPTS_PATH), posix=False)
     with subprocess.Popen(cmd, shell=True, stdout=subprocess.DEVNULL) as proc:
         if boot_source == "eeprom":
-            mik32_eeprom.write_words(bytes2words(get_content(filename)))
+            result = mik32_eeprom.write_words(bytes2words(get_content(filename)))
         elif boot_source == "spifi":
             mik32_spifi.spifi_write_file(get_content(filename))
+            result = 0 # TODO
         elif boot_source == "ram":
             mik32_ram.write_file(filename)
+            result = 0 # TODO
         else:
             raise Exception("Unsupported boot source, use eeprom or spifi")
+            result = 1
         proc.kill()
+    return result