checked uart_tx_cb null or not

Author: embedded4ever

cubemx/UserLib/machine/Src/machine.c

@@ -100,9 +100,12 @@ error_code machine_start (struct command_machine* self)
 
 else
 { 
-self -> uart_tx_cb ((uint8_t *)self -> current_command_window -> command_table[self -> command_index] -> command_name, 
-strlen(self -> current_command_window -> command_table[self -> command_index] -> command_name));
-}
+if (self -> uart_tx_cb != NULL)
+{
+self -> uart_tx_cb ((uint8_t *)self -> current_command_window -> command_table[self -> command_index] -> command_name, 
+strlen(self -> current_command_window -> command_table[self -> command_index] -> command_name));
+}
+}
 
 self -> timer = 1;
 
@@ -260,8 +263,12 @@ error_code machine_loop (struct command_machine* self)
 
 else
 {
-self -> uart_tx_cb((uint8_t *)self -> current_command_window -> command_table[self -> command_index] -> command_name, 
-strlen(self -> current_command_window -> command_table[self -> command_index] -> command_name));
+if (self -> uart_tx_cb != NULL)
+{
+self -> uart_tx_cb((uint8_t *)self -> current_command_window -> command_table[self -> command_index] -> command_name, 
+strlen(self -> current_command_window -> command_table[self -> command_index] -> command_name));
+}
+
 }
 
 self -> is_state_transition_available = 0;