Fix

.gitignore

@@ -1,3 +1,4 @@
 build
 STM32F439.svd
-putty_run
+putty_run
+nanopb

app/CMakeLists.txt

@@ -1,14 +1,5 @@
 set(elf_file stm32.elf)
 
-# include(FetchContent)
-
-# FetchContent_Declare(nanopb
-#     GIT_REPOSITORY https://github.com/nanopb/nanopb
-#     GIT_TAG        master
-# )
-
-# FetchContent_MakeAvailable(nanopb)
-
 # set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/nanopb/extra)
 # find_package(Nanopb REQUIRED)
 

app/main.c

@@ -42,12 +42,13 @@ int main(void)
   
   while (1)
   {
-    lwipProcess(); 
+    // lwipProcess(); 
     const char *data = "Hello, world!";
     sprintf(numStr, "%d", cnt++);
     char* strCat = strcat(data, numStr);
     // udp_send_data(numStr, strlen(numStr));
     // serialzie();
+    // printf("Test\r\n");
     GPIO_ToggleBits(GPIOB, GPIO_Pin_14);
     delay(100);
   }

bsp/stm32f4xx_it.c

@@ -26,7 +26,7 @@ void delay(uint32_t delay) {
 void TIM7_IRQHandler()
 {
     TIM_ClearITPendingBit(TIM7, TIM_IT_Update); 
-
+    // GPIO_ToggleBits(GPIOB, GPIO_Pin_7); 
     if(getLwipStatus()->link_status == LINK_UP) {
         GPIO_ToggleBits(GPIOB, GPIO_Pin_7); 
     }

terminal

@@ -1 +1 @@
-sudo screen /dev/ttyUSB0 115200
+screen /dev/ttyUSB0 115200