diff --git a/bsp/stm32/stm32f072-st-nucleo/applications/main.c b/bsp/stm32/stm32f072-st-nucleo/applications/main.c
index 486ed612834c934d0011a316c5b12e8d3d407ed9..88489a380c2da5f1477faf2d8a1e2e37e0e830f4 100644
--- a/bsp/stm32/stm32f072-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f072-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED2_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED2_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f091-st-nucleo/applications/main.c b/bsp/stm32/stm32f091-st-nucleo/applications/main.c
index 9783d01e55c8c116ecfe329d52ba33b8fd35fa08..6debd35f0bba7fc3cd6b026410193d033688051c 100644
--- a/bsp/stm32/stm32f091-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f091-st-nucleo/applications/main.c
@@ -17,12 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
-
     /* set LED2 pin mode to output */
     rt_pin_mode(LED2_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED2_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-atk-nano/applications/main.c b/bsp/stm32/stm32f103-atk-nano/applications/main.c
index be493624c1e49320ceaa89f1aabe3adbbca03707..8b86d19f42a5e2fb929bd35eb53732019906c1a5 100644
--- a/bsp/stm32/stm32f103-atk-nano/applications/main.c
+++ b/bsp/stm32/stm32f103-atk-nano/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-atk-warshipv3/applications/main.c b/bsp/stm32/stm32f103-atk-warshipv3/applications/main.c
index 55c2b620234cdedaabf5ce834d8c9afe0dcc23d9..21591b27c9d7335baa5fa439857805d2029f0ab2 100644
--- a/bsp/stm32/stm32f103-atk-warshipv3/applications/main.c
+++ b/bsp/stm32/stm32f103-atk-warshipv3/applications/main.c
@@ -19,13 +19,12 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
     /* set LED1 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_pin_write(LED1_PIN, PIN_HIGH);
diff --git a/bsp/stm32/stm32f103-blue-pill/applications/main.c b/bsp/stm32/stm32f103-blue-pill/applications/main.c
index 9be4cd59b1afa8a8100a5b0ccaa531cca1f2e130..49c8857458de750b6a3c44d26ab3b8df4b1111d7 100644
--- a/bsp/stm32/stm32f103-blue-pill/applications/main.c
+++ b/bsp/stm32/stm32f103-blue-pill/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-dofly-M3S/applications/main.c b/bsp/stm32/stm32f103-dofly-M3S/applications/main.c
index 0ec4930664b902b37d4753dd3afa56122a1d4a4c..bec9c16a1cc3c890f17cf9ca28d0014bae898437 100644
--- a/bsp/stm32/stm32f103-dofly-M3S/applications/main.c
+++ b/bsp/stm32/stm32f103-dofly-M3S/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-dofly-lyc8/applications/main.c b/bsp/stm32/stm32f103-dofly-lyc8/applications/main.c
index dc4e9cbb7ed75b2cd626d9bf6996111364f6aa70..7d6ee4fd8d1941af414c04a5f62a4c69ad1b2bef 100644
--- a/bsp/stm32/stm32f103-dofly-lyc8/applications/main.c
+++ b/bsp/stm32/stm32f103-dofly-lyc8/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-fire-arbitrary/applications/main.c b/bsp/stm32/stm32f103-fire-arbitrary/applications/main.c
index 7ddaa5ee96ee75847b76d7ffcbf05a3141a8afbe..2f87d8ba9ce12db1c6f614e6e7738960b3be26e4 100644
--- a/bsp/stm32/stm32f103-fire-arbitrary/applications/main.c
+++ b/bsp/stm32/stm32f103-fire-arbitrary/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-gizwits-gokitv21/applications/main.c b/bsp/stm32/stm32f103-gizwits-gokitv21/applications/main.c
index bf9e60aae90d471c325e7a54503ade00eed607fb..a14486afca44a28f98030f4ab2dcbcf4abccaec2 100644
--- a/bsp/stm32/stm32f103-gizwits-gokitv21/applications/main.c
+++ b/bsp/stm32/stm32f103-gizwits-gokitv21/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED4_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED4_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-hw100k-ibox/applications/main.c b/bsp/stm32/stm32f103-hw100k-ibox/applications/main.c
index 096b4df406bd89eb5ad9edd6fd2f2291df88d789..9b5ca4b3a1120e5e7c2047ac2ac3036d964ba98a 100644
--- a/bsp/stm32/stm32f103-hw100k-ibox/applications/main.c
+++ b/bsp/stm32/stm32f103-hw100k-ibox/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-onenet-nbiot/applications/main.c b/bsp/stm32/stm32f103-onenet-nbiot/applications/main.c
index be493624c1e49320ceaa89f1aabe3adbbca03707..8b86d19f42a5e2fb929bd35eb53732019906c1a5 100644
--- a/bsp/stm32/stm32f103-onenet-nbiot/applications/main.c
+++ b/bsp/stm32/stm32f103-onenet-nbiot/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f103-yf-ufun/applications/main.c b/bsp/stm32/stm32f103-yf-ufun/applications/main.c
index ffe4955e196b5cb319633730b9b20ca9f2d0e389..451ca360999825dab33b4353f20de589c3820d27 100644
--- a/bsp/stm32/stm32f103-yf-ufun/applications/main.c
+++ b/bsp/stm32/stm32f103-yf-ufun/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED3_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED3_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f107-uc-eval/applications/main.c b/bsp/stm32/stm32f107-uc-eval/applications/main.c
index 9dca242b10f1a78a16e75e2489878c265287a58f..5ff91189586d5d203b623067ddd67c0c9e8e39e6 100644
--- a/bsp/stm32/stm32f107-uc-eval/applications/main.c
+++ b/bsp/stm32/stm32f107-uc-eval/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED1 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED1_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f401-st-nucleo/applications/main.c b/bsp/stm32/stm32f401-st-nucleo/applications/main.c
index 48009f1c78591c1c891b7915bf25133f9b30b7b3..c4fc239753d63bd39299a1eb155024c9dcdd5b80 100644
--- a/bsp/stm32/stm32f401-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f401-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f405-smdz-breadfruit/applications/main.c b/bsp/stm32/stm32f405-smdz-breadfruit/applications/main.c
index 47358c8a6188d32d64e18d56157775fcfc8c0d1e..5fdff391d9201562e3bc96fb1d5f522a92c3d049 100644
--- a/bsp/stm32/stm32f405-smdz-breadfruit/applications/main.c
+++ b/bsp/stm32/stm32f405-smdz-breadfruit/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f407-atk-explorer/applications/main.c b/bsp/stm32/stm32f407-atk-explorer/applications/main.c
index 2fc9307caf5a792ae05ab6715c977d23d486a969..897ea4e4c96748266e87b2a857fe6bc8d40c141f 100644
--- a/bsp/stm32/stm32f407-atk-explorer/applications/main.c
+++ b/bsp/stm32/stm32f407-atk-explorer/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f407-st-discovery/applications/main.c b/bsp/stm32/stm32f407-st-discovery/applications/main.c
index 2651a75073d9afef5db4909f1d416c796983496e..ecc3464e69001c2ea038cbdc69f83f01ed1234d4 100644
--- a/bsp/stm32/stm32f407-st-discovery/applications/main.c
+++ b/bsp/stm32/stm32f407-st-discovery/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f410-st-nucleo/applications/main.c b/bsp/stm32/stm32f410-st-nucleo/applications/main.c
index 05ab0e250464126f9585f661a6233b41c0c7d1ea..796ed53fa1beca1b77162e0ff20203c9f9f853ed 100644
--- a/bsp/stm32/stm32f410-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f410-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f411-atk-nano/applications/main.c b/bsp/stm32/stm32f411-atk-nano/applications/main.c
index df457f4760360813c4f298b05df9ee0ee05bbc0a..c37fd1cdecea96ed92809fbb75321fb1f93474b9 100644
--- a/bsp/stm32/stm32f411-atk-nano/applications/main.c
+++ b/bsp/stm32/stm32f411-atk-nano/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f411-st-nucleo/applications/main.c b/bsp/stm32/stm32f411-st-nucleo/applications/main.c
index 0e109663aece81e19e8a66a0b3f938020e8d89e8..95b3c77b3622de0336edc0be97c20a7f9e612ab8 100644
--- a/bsp/stm32/stm32f411-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f411-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f411-weact-MiniF4/applications/main.c b/bsp/stm32/stm32f411-weact-MiniF4/applications/main.c
index be6a8af86786192e63c538da787529a92dbdb90e..178bef6ba6ff2e1ef0b3e9be382e7a6c128b986d 100644
--- a/bsp/stm32/stm32f411-weact-MiniF4/applications/main.c
+++ b/bsp/stm32/stm32f411-weact-MiniF4/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f412-st-nucleo/applications/main.c b/bsp/stm32/stm32f412-st-nucleo/applications/main.c
index 2cf35c5bc6d926e53d40d4cdb4f8dd9716310236..77417937d58454775b1096092deac054275fefef 100644
--- a/bsp/stm32/stm32f412-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f412-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f413-st-nucleo/applications/main.c b/bsp/stm32/stm32f413-st-nucleo/applications/main.c
index 799dc6797de07fd34661d5570a4c4393ee0357f7..442502550c67ba9a950e131305ecac06bbff4cdd 100644
--- a/bsp/stm32/stm32f413-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f413-st-nucleo/applications/main.c
@@ -23,11 +23,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED1 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED1_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f427-robomaster-a/applications/main.c b/bsp/stm32/stm32f427-robomaster-a/applications/main.c
index 6cef3cbb34c632b8664fa9c5cd3b1664f18a2d65..1e82d7634efd677aa3ce8b24df338428b7f55d01 100644
--- a/bsp/stm32/stm32f427-robomaster-a/applications/main.c
+++ b/bsp/stm32/stm32f427-robomaster-a/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f429-armfly-v6/applications/main.c b/bsp/stm32/stm32f429-armfly-v6/applications/main.c
index 21b7c14ec0b3607dea82253390d09d8a746bf2e9..d964d953350e9581ba52a31d98afa5ef2960bca5 100644
--- a/bsp/stm32/stm32f429-armfly-v6/applications/main.c
+++ b/bsp/stm32/stm32f429-armfly-v6/applications/main.c
@@ -15,14 +15,12 @@
 
 int main(void)
 {
-    int count = 1;
-
     HC574_SetPin(LED1,0);
     HC574_SetPin(LED2,0);
     HC574_SetPin(LED3,0);
     HC574_SetPin(LED4,0);
 
-    while (count++)
+    while (1)
     {
         HC574_SetPin(LED1,1);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f429-atk-apollo/applications/main.c b/bsp/stm32/stm32f429-atk-apollo/applications/main.c
index 6d19a46edb67b6646a59c35b1efa414f92dc2ca7..3a41980f00a1af0d45ff1f21a498e18a1d701fe5 100644
--- a/bsp/stm32/stm32f429-atk-apollo/applications/main.c
+++ b/bsp/stm32/stm32f429-atk-apollo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f429-fire-challenger/applications/main.c b/bsp/stm32/stm32f429-fire-challenger/applications/main.c
index 64e40b75c8d73c65d0cb5bac4fdb06356ca7c140..457ec11f24078147e4ca72d0bbd3f548a5240966 100644
--- a/bsp/stm32/stm32f429-fire-challenger/applications/main.c
+++ b/bsp/stm32/stm32f429-fire-challenger/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f429-st-disco/applications/main.c b/bsp/stm32/stm32f429-st-disco/applications/main.c
index 992f2b5d74f3c8857aa84d1ab42803d22ce3ea39..f28b0c70cbb7dd183ae4e62e73c08c6365a3df33 100644
--- a/bsp/stm32/stm32f429-st-disco/applications/main.c
+++ b/bsp/stm32/stm32f429-st-disco/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED1 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED1_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f446-st-nucleo/applications/main.c b/bsp/stm32/stm32f446-st-nucleo/applications/main.c
index 897c6eec1c2b8776e14f928ddb46297ff8563639..cad622b154c912dc0a746fab9f42208ec3749cf4 100644
--- a/bsp/stm32/stm32f446-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f446-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED2 pin mode to output */
     rt_pin_mode(LED2_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED2_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f469-st-disco/applications/main.c b/bsp/stm32/stm32f469-st-disco/applications/main.c
index 759572d376811d4fb52f49a9c6e8b5fd4e645b89..03fc02fffc57d38b1bb5a5ccc4dea310c10e35f5 100644
--- a/bsp/stm32/stm32f469-st-disco/applications/main.c
+++ b/bsp/stm32/stm32f469-st-disco/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED1 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED1_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f746-st-disco/applications/main.c b/bsp/stm32/stm32f746-st-disco/applications/main.c
index 0024ce1c0a49cefc809a3559ffc2e5696159e6a9..11497a85c358b0a5de27d46da5ba83b85f48e497 100644
--- a/bsp/stm32/stm32f746-st-disco/applications/main.c
+++ b/bsp/stm32/stm32f746-st-disco/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED1 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED1_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f767-atk-apollo/applications/main.c b/bsp/stm32/stm32f767-atk-apollo/applications/main.c
index 71e6132ea29db310fad15fdd37437c9f67de81da..7a7438d1b69a727d2d551ed6dd92d6e45ab807ad 100644
--- a/bsp/stm32/stm32f767-atk-apollo/applications/main.c
+++ b/bsp/stm32/stm32f767-atk-apollo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f767-fire-challenger/applications/main.c b/bsp/stm32/stm32f767-fire-challenger/applications/main.c
index 4cf67f2e9ec187bc6d6ee2393a5b546ccf6cb417..524c000ac5a687183a7ad17ee7ca6e43fb7f2ccd 100644
--- a/bsp/stm32/stm32f767-fire-challenger/applications/main.c
+++ b/bsp/stm32/stm32f767-fire-challenger/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f767-st-nucleo/applications/main.c b/bsp/stm32/stm32f767-st-nucleo/applications/main.c
index a0967c132699200b575b598ba60747141457784a..e7ae8dd7ede274927b46e641abcaf5b61784063c 100644
--- a/bsp/stm32/stm32f767-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32f767-st-nucleo/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED1 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED1_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32f769-st-disco/applications/main.c b/bsp/stm32/stm32f769-st-disco/applications/main.c
index d61afe14c395a971dd2e4c767e31cd7055aef0bc..17a86ceb17742086badda02f8f9e19b3762b7f2a 100644
--- a/bsp/stm32/stm32f769-st-disco/applications/main.c
+++ b/bsp/stm32/stm32f769-st-disco/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED1 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED1_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32g070-st-nucleo/applications/main.c b/bsp/stm32/stm32g070-st-nucleo/applications/main.c
index 5f22fcae657136e040a583ada88110a63dc90978..b205d8c186ab2256d9aa4c8a78e4dd05f3e056ed 100644
--- a/bsp/stm32/stm32g070-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32g070-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32g071-st-nucleo/applications/main.c b/bsp/stm32/stm32g071-st-nucleo/applications/main.c
index 5f22fcae657136e040a583ada88110a63dc90978..b205d8c186ab2256d9aa4c8a78e4dd05f3e056ed 100644
--- a/bsp/stm32/stm32g071-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32g071-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32g431-st-nucleo/applications/main.c b/bsp/stm32/stm32g431-st-nucleo/applications/main.c
index fa4fd35a6e7a493c2c7e578bcb9917d9d86a4edb..6d2bf2da24318d1f4366ed053b9d1c27bd915601 100644
--- a/bsp/stm32/stm32g431-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32g431-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED2 pin mode to output */
     rt_pin_mode(LED2_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED2_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32h743-atk-apollo/applications/main.c b/bsp/stm32/stm32h743-atk-apollo/applications/main.c
index 376d3c78ff4e3a838b24822307b926e56550b8a3..ef4f783aa6ae20f732070217107c59b00713f333 100644
--- a/bsp/stm32/stm32h743-atk-apollo/applications/main.c
+++ b/bsp/stm32/stm32h743-atk-apollo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32h743-st-nucleo/applications/main.c b/bsp/stm32/stm32h743-st-nucleo/applications/main.c
index 9a8ac51bb579bc0c691d14531de3e796b40aba3c..062f6d352b7521de921c796da59b38cdc50fb1ce 100644
--- a/bsp/stm32/stm32h743-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32h743-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32h747-st-discovery/applications/main.c b/bsp/stm32/stm32h747-st-discovery/applications/main.c
index 3904f7b3bc9db88ec5d7f2f5b4c08e2830f59f75..e4bf0fdf5d849566d698cd30f982f2f8e40644a8 100644
--- a/bsp/stm32/stm32h747-st-discovery/applications/main.c
+++ b/bsp/stm32/stm32h747-st-discovery/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32h750-armfly-h7-tool/applications/main.c b/bsp/stm32/stm32h750-armfly-h7-tool/applications/main.c
index b19e338dc5acf9f799d6decc5f96f5407b585772..b30b930b71c76438c42ac3c1efc35c59c2a34306 100644
--- a/bsp/stm32/stm32h750-armfly-h7-tool/applications/main.c
+++ b/bsp/stm32/stm32h750-armfly-h7-tool/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32h750-artpi-h750/applications/main.c b/bsp/stm32/stm32h750-artpi-h750/applications/main.c
index 6ab088b624072d242e6ab4d417b7d237f6459864..58a1949abe7269c01612cf9c237cd3d27c63cc34 100644
--- a/bsp/stm32/stm32h750-artpi-h750/applications/main.c
+++ b/bsp/stm32/stm32h750-artpi-h750/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l010-st-nucleo/applications/main.c b/bsp/stm32/stm32l010-st-nucleo/applications/main.c
index 5f22fcae657136e040a583ada88110a63dc90978..b205d8c186ab2256d9aa4c8a78e4dd05f3e056ed 100644
--- a/bsp/stm32/stm32l010-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l010-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l053-st-nucleo/applications/main.c b/bsp/stm32/stm32l053-st-nucleo/applications/main.c
index 5f22fcae657136e040a583ada88110a63dc90978..b205d8c186ab2256d9aa4c8a78e4dd05f3e056ed 100644
--- a/bsp/stm32/stm32l053-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l053-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l412-st-nucleo/applications/main.c b/bsp/stm32/stm32l412-st-nucleo/applications/main.c
index b22a9d1ba3cce4b45b9572cc3a8a9713efb5af59..1f4f98a18dccc22977c60a88f321de127a8643e4 100644
--- a/bsp/stm32/stm32l412-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l412-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LD4 pin mode to output */
     rt_pin_mode(LD4_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LD4_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l431-BearPi/applications/main.c b/bsp/stm32/stm32l431-BearPi/applications/main.c
index 9222b842fc2012d2b1651ab899e64cafe66ce860..9da51ac6b9b8dd750e6a60a7a04740efd2fa2888 100644
--- a/bsp/stm32/stm32l431-BearPi/applications/main.c
+++ b/bsp/stm32/stm32l431-BearPi/applications/main.c
@@ -17,19 +17,17 @@
 
 int main(void)
 {
-  int count = 1;
+    rt_kprintf("---Welcome use BearPi---\n");
+    /* set LED pin mode to output */
+    rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-  rt_kprintf("---Welcome use BearPi---\n");
-  /* set LED pin mode to output */
-  rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
+    while (1)
+    {
+        rt_pin_write(LED0_PIN, PIN_HIGH);
+        rt_thread_mdelay(500);
+        rt_pin_write(LED0_PIN, PIN_LOW);
+        rt_thread_mdelay(500);
+    }
 
-  while (count++)
-  {
-    rt_pin_write(LED0_PIN, PIN_HIGH);
-    rt_thread_mdelay(500);
-    rt_pin_write(LED0_PIN, PIN_LOW);
-    rt_thread_mdelay(500);
-  }
-
-  return RT_EOK;
+    return RT_EOK;
 }
diff --git a/bsp/stm32/stm32l432-st-nucleo/applications/main.c b/bsp/stm32/stm32l432-st-nucleo/applications/main.c
index 336347c11ee80a7a69c008bb42b8eb6819a80078..a74219c21a46d86a0fe9a16e8c91b11c3cbb0177 100644
--- a/bsp/stm32/stm32l432-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l432-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l433-st-nucleo/applications/main.c b/bsp/stm32/stm32l433-st-nucleo/applications/main.c
index 056bad6689378f030b809a12fa350c6271894c89..20e26de5e02c25194b7112c18675001c020a0426 100644
--- a/bsp/stm32/stm32l433-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l433-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l452-st-nucleo/applications/main.c b/bsp/stm32/stm32l452-st-nucleo/applications/main.c
index fa4fd35a6e7a493c2c7e578bcb9917d9d86a4edb..6d2bf2da24318d1f4366ed053b9d1c27bd915601 100644
--- a/bsp/stm32/stm32l452-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l452-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED2 pin mode to output */
     rt_pin_mode(LED2_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED2_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l475-atk-pandora/applications/main.c b/bsp/stm32/stm32l475-atk-pandora/applications/main.c
index dfad8c68c14d51d929ee7657dcd9a8c91058982f..a0db7f7a23369b00c840877d51607e89a7e9ccc4 100644
--- a/bsp/stm32/stm32l475-atk-pandora/applications/main.c
+++ b/bsp/stm32/stm32l475-atk-pandora/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l475-st-discovery/applications/main.c b/bsp/stm32/stm32l475-st-discovery/applications/main.c
index bddb8abe63dd8351d183ae2e5497b34d4b66adcc..419748d9940a21b09659784d970cf7bde4cd271e 100644
--- a/bsp/stm32/stm32l475-st-discovery/applications/main.c
+++ b/bsp/stm32/stm32l475-st-discovery/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l476-st-nucleo/applications/main.c b/bsp/stm32/stm32l476-st-nucleo/applications/main.c
index b22a8b8e8d513eae665d95e4ae176b124a63aa90..db859c5b0a36ce1df184396802cafc22151a72cc 100644
--- a/bsp/stm32/stm32l476-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l476-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l496-ali-developer/applications/main.c b/bsp/stm32/stm32l496-ali-developer/applications/main.c
index 86d1cf72dd55c311dd3ad6286b6cbd74e55c5b17..7837b32e1fce872d232b861c21d95f068d401bd2 100644
--- a/bsp/stm32/stm32l496-ali-developer/applications/main.c
+++ b/bsp/stm32/stm32l496-ali-developer/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l496-st-nucleo/applications/main.c b/bsp/stm32/stm32l496-st-nucleo/applications/main.c
index efe91875b9f28ac3800ec791e3a508b98e6f24d5..fc5173819fa0aa51c18a8158e2cf77711b95c809 100644
--- a/bsp/stm32/stm32l496-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l496-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED2 pin mode to output */
     rt_pin_mode(LED2_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED2_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l4r5-st-nucleo/applications/main.c b/bsp/stm32/stm32l4r5-st-nucleo/applications/main.c
index 2dbb2b2c81e1a6a5a87214d9872d2cbbd339c3c5..c916e2e68238df8ef53ae601bdd41c9e178ce0e8 100644
--- a/bsp/stm32/stm32l4r5-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32l4r5-st-nucleo/applications/main.c
@@ -23,11 +23,9 @@
 
 int main(void)
 {
-    int count = 1;
-
     rt_pin_mode(LED_RUN_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED_RUN_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32l4r9-st-eval/applications/main.c b/bsp/stm32/stm32l4r9-st-eval/applications/main.c
index c53f70fb97c65b57e7f9547c2496cdf059571213..431af5fcdf2e9b47e8cbad41948b55b269ec800b 100644
--- a/bsp/stm32/stm32l4r9-st-eval/applications/main.c
+++ b/bsp/stm32/stm32l4r9-st-eval/applications/main.c
@@ -18,11 +18,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED0_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32mp157a-st-discovery/applications/main.c b/bsp/stm32/stm32mp157a-st-discovery/applications/main.c
index 85d9d3ba89e8d9f538e4c13558bb36476489cd98..39d87173fca04d1da1c01ed1f2af3a51a6388c2d 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/applications/main.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LD7 pin mode to output */
     rt_pin_mode(LED7_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED7_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32mp157a-st-ev1/applications/main.c b/bsp/stm32/stm32mp157a-st-ev1/applications/main.c
index 6e70b839271edb0449c73fdd683d0814bec95021..5c14a7f8a4559ad54d8e5f780312dd0d697d66ba 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/applications/main.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LD8 pin mode to output */
     rt_pin_mode(LED4_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED4_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32wb55-st-nucleo/applications/main.c b/bsp/stm32/stm32wb55-st-nucleo/applications/main.c
index f6e244c12ca4f999d991de04c2c2e775a39a58a4..cdc8b312f4eb00478f82c2df94dc728fd8c4a2ac 100644
--- a/bsp/stm32/stm32wb55-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32wb55-st-nucleo/applications/main.c
@@ -17,11 +17,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED0 pin mode to output */
     rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED1_PIN, PIN_HIGH);
         rt_thread_mdelay(500);
diff --git a/bsp/stm32/stm32wl55-st-nucleo/applications/main.c b/bsp/stm32/stm32wl55-st-nucleo/applications/main.c
index 57385ad74cbf78458615f73eaccabdad8bd02d91..9b54d7b2ec6c45c05f1c321872bab425f7738fe2 100644
--- a/bsp/stm32/stm32wl55-st-nucleo/applications/main.c
+++ b/bsp/stm32/stm32wl55-st-nucleo/applications/main.c
@@ -19,11 +19,10 @@
 
 int main(void)
 {
-    int count = 1;
     /* set LED_BLUE pin mode to output */
     rt_pin_mode(LED_BLUE_PIN, PIN_MODE_OUTPUT);
 
-    while (count++)
+    while (1)
     {
         rt_pin_write(LED_BLUE_PIN, PIN_HIGH);
         rt_thread_mdelay(500);