add mcu flash detect

Src/main.c

@@ -49,23 +49,17 @@ OF SUCH DAMAGE.
 */
 int main(void)
 {
+    led_init();
+    mcu_detect_and_config();
 
     setbuf(stdout, NULL);
     systick_config();
     rs485_init();
 
-    led_init();
+    printf("Flash size: %d Kbytes\n", get_flash_size());
 
 #ifdef DEBUG_VERBOSE
-    char hello_world[] = {"Hello World!\r\n"};
-
-    for (uint8_t i = 0; i < sizeof(hello_world); i++)
-    {
-        while (usart_flag_get(RS485_PHY, USART_FLAG_TBE) == RESET) {}
-        usart_data_transmit(RS485_PHY, hello_world[i]);
-    }
-    
-    while (usart_flag_get(RS485_PHY, USART_FLAG_TC) == RESET) {}
+    printf("Hello World!\r\n");
 #endif
 
     i2c_config();
@@ -78,6 +72,6 @@ int main(void)
 
     while(1){
         command_process();
-        delay_ms(10); 
+        delay_ms(10);     
     }
 }