[update] 1.添加ewd文件 2.实现打印到串口函数

Core/Inc/main.h

 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
 #include "SEGGER_RTT.h"
-#define pkt_kprintf(...)  SEGGER_RTT_printf(0, __VA_ARGS__)
-#define rt_kprintf(...)  SEGGER_RTT_printf(0, __VA_ARGS__)
+extern void __kprintf(char *fmt, ...);
+#define pkt_kprintf(fmt, ...)  __kprintf(fmt, ##__VA_ARGS__) //SEGGER_RTT_printf(0, __VA_ARGS__)
+#define rt_kprintf(fmt, ...)  __kprintf(fmt, ##__VA_ARGS__) //SEGGER_RTT_printf(0, __VA_ARGS__)
   typedef uint32_t rt_uint32_t;
 /* USER CODE END Includes */
 

Core/Src/usart.c

   HAL_UART_Receive(&huart1, &ch, 1, 0xffff);
   return ch;
 }
+
+#include <stdarg.h>
+void __kprintf(char *fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    static char string[100];
+    memset(string, 0, sizeof(string));
+    vsnprintf(string, sizeof(string), fmt, args);
+    va_end(args);
+    HAL_UART_Transmit(&huart1, (uint8_t *)&string, strlen(string), 0xffff);
+}
 /* USER CODE END 1 */
 
 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/