diff --git a/.vscode/settings.json b/.vscode/settings.json
index 93c7f21..2ebe8eb 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -6,5 +6,6 @@
         "by_serial.h": "c",
         "log.h": "c",
         "termios.h": "c"
-    }
+    },
+    "cmake.configureOnOpen": true
 }
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab01009..82053f4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,6 +15,7 @@ set(LOGC logc/log.c)
 # add_library(bycmd ${BYCMD} ${FRAME} ${CRC16})
 # add_executable(${test} ${TEST_MAIN} ${FRAME})
 add_executable(bycmd_test ${BYCMD} ${TOML} ${CRC16} ${LOGC} ${TEST_MAIN})
+add_library(bycmd SHARED ${BYCMD} ${TOML} ${CRC16} ${LOGC})
 
 target_link_libraries(bycmd_test pthread)
 # target_link_libraries(${test} bycmd)
\ No newline at end of file