feat:add rtt support

Core/Src/main.c

@@ -23,6 +23,7 @@
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
 #include "stdlib.h"
+#include "log.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -72,6 +73,14 @@ int main(void)
   /* MPU Configuration--------------------------------------------------------*/
   MPU_Config();
 
+  /* Enable the CPU Cache */
+
+  /* Enable I-Cache---------------------------------------------------------*/
+  SCB_EnableICache();
+
+  /* Enable D-Cache---------------------------------------------------------*/
+  SCB_EnableDCache();
+
   /* MCU Configuration--------------------------------------------------------*/
 
   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
@@ -92,12 +101,18 @@ int main(void)
   MX_GPIO_Init();
   /* USER CODE BEGIN 2 */
   int *i = malloc(sizeof(int));
+  *i = 0;
+  rtt_log_init();
+
   /* USER CODE END 2 */
 
   /* Infinite loop */
   /* USER CODE BEGIN WHILE */
   while (1)
   {
+  
+    HAL_Delay(20);
+    rtt_log(LOG_INFO,"%d",*i);
     *i += 1;
     /* USER CODE END WHILE */