diff --git a/basic/zbase_gstate.c b/basic/zbase_gstate.c
new file mode 100644
index 0000000..b9cd221
--- /dev/null
+++ b/basic/zbase_gstate.c
@@ -0,0 +1,8 @@
+#include "zbase_gstate.h"
+
+zbase_gstate_t gstate;
+
+zbase_gstate_t* zbase_gstate_get() { return &gstate; }
+
+void zbase_gstate_set_fatal_flag() { gstate.fatalFlag = true; }
+void zbase_gstate_clear_fatal_flag() { gstate.fatalFlag = false; }
\ No newline at end of file
diff --git a/basic/zbase_gstate.h b/basic/zbase_gstate.h
new file mode 100644
index 0000000..216fb4f
--- /dev/null
+++ b/basic/zbase_gstate.h
@@ -0,0 +1,18 @@
+#pragma once
+#include <stdbool.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+  bool fatalFlag;
+} zbase_gstate_t;
+
+zbase_gstate_t* zbase_gstate_get();
+
+void zbase_gstate_set_fatal_flag();
+void zbase_gstate_clear_fatal_flag();
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/basic/zlog.c b/basic/zlog.c
index 3f0499e..ab8fb0d 100644
--- a/basic/zlog.c
+++ b/basic/zlog.c
@@ -1,9 +1,10 @@
 #include "zlog.h"
-#include "zbase.h"
+
 #include "project_configs.h"
+#include "zbase.h"
 
-bool                      g_xs_enable_log = true;
-extern UART_HandleTypeDef DEBUG_UART;
+bool                g_xs_enable_log = true;
+UART_HandleTypeDef* debuguart;
 /*********************************************************************
  * @fn      _write
  *
@@ -19,12 +20,14 @@ __attribute__((used)) int _write(int fd, char* buf, int size) {
 
   for (i = 0; i < size; i++) {
     uint8_t c = *buf++;
-    HAL_UART_Transmit(&DEBUG_UART, &c, 1, 100);
+    if (debuguart) HAL_UART_Transmit(debuguart, &c, 1, 100);
   }
 
   return size;
 }
 
+void zlog_init(UART_HandleTypeDef* uart) { debuguart = uart; }
+
 void zlog_enable(bool enable) { g_xs_enable_log = enable; }
 void zlog(const char* fmt, ...) {
   if (g_xs_enable_log) {
@@ -35,7 +38,7 @@ void zlog(const char* fmt, ...) {
   }
 }
 
-void zlog_raw(const char* info){
+void zlog_raw(const char* info) {
   if (g_xs_enable_log) {
     printf(info);
   }
diff --git a/basic/zlog.h b/basic/zlog.h
index 7ec2470..b16cc93 100644
--- a/basic/zlog.h
+++ b/basic/zlog.h
@@ -1,9 +1,9 @@
 #pragma once
 #include "zbase.h"
 
-extern bool g_xs_enable_log;
+extern bool     g_xs_enable_log;
 extern uint32_t zget_ticket(void);
-extern void zdelay_ms(int ms) ;
+extern void     zdelay_ms(int ms);
 
 #define ZLOG_RELEASE(TAG, fmt, ...)       \
   if (g_xs_enable_log) {                  \
@@ -40,6 +40,7 @@ extern void zdelay_ms(int ms) ;
 
 #define ZARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
 
+void zlog_init(UART_HandleTypeDef* uart);
 void zlog(const char* fmt, ...);
 void zlog_raw(const char* info);
 void zlog_enable(bool enable);
diff --git a/zbasic.h b/zbasic.h
index 2207b12..ed9a8e8 100644
--- a/zbasic.h
+++ b/zbasic.h
@@ -10,6 +10,8 @@ extern "C" {
 #include "basic/zgpio.h"
 #include "basic/zlog.h"
 #include "basic/sn.h"
+//
+#include "basic/zbase_gstate.h"
 
 #include "cmsis_version.h"
 #include "cmsis_os.h"