feat(console): Add console output enable switch

- rt_console_output_enabled()/rt_console_output_is_enabled() gate rt_kprintf/rt_kputs output with the switch

include/rtthread.h

@@ -783,6 +783,13 @@ void rt_components_board_init(void);
 #else
 int rt_kprintf(const char *fmt, ...);
 void rt_kputs(const char *str);
+#ifdef RT_USING_CONSOLE_OUTPUT_CTL
+void rt_console_output_set_enabled(rt_bool_t enabled);
+rt_bool_t rt_console_output_get_enabled(void);
+#else
+#define rt_console_output_set_enabled(enabled) ((void)0)
+#define rt_console_output_get_enabled()        (RT_TRUE)
+#endif /* RT_USING_CONSOLE_OUTPUT_CTL */
 #endif /* RT_USING_CONSOLE */
 
 rt_err_t rt_backtrace(void);

src/Kconfig

@@ -430,6 +430,18 @@ if RT_USING_CONSOLE
         string "the device name for console"
         default "uart1"
 
+    config RT_USING_CONSOLE_OUTPUT_CTL
+        bool "Enable runtime console output control"
+        default y
+        help
+            Enable runtime control for console output.
+            When enabled, rt_console_output_set_enabled() and
+            rt_console_output_get_enabled() can be used to switch
+            rt_kputs()/rt_kprintf() output on or off dynamically.
+
+            When disabled, these APIs are not compiled as real symbols and
+            output path has no runtime check, so console output stays enabled.
+
 endif
 
 config RT_VER_NUM

src/kservice.c

@@ -208,6 +208,32 @@ rt_device_t rt_console_set_device(const char *name)
 RTM_EXPORT(rt_console_set_device);
 #endif /* RT_USING_DEVICE */
 
+#ifdef RT_USING_CONSOLE_OUTPUT_CTL
+static volatile rt_bool_t _console_output_enabled = RT_TRUE;
+
+/**
+ * @brief Enable or disable console log output.
+ *
+ * @param enabled RT_TRUE to enable output, RT_FALSE to disable output.
+ */
+void rt_console_output_set_enabled(rt_bool_t enabled)
+{
+    _console_output_enabled = enabled;
+}
+RTM_EXPORT(rt_console_output_set_enabled);
+
+/**
+ * @brief Get current console log output enable state.
+ *
+ * @return RT_TRUE if output is enabled, RT_FALSE otherwise.
+ */
+rt_bool_t rt_console_output_get_enabled(void)
+{
+    return _console_output_enabled;
+}
+RTM_EXPORT(rt_console_output_get_enabled);
+#endif /* RT_USING_CONSOLE_OUTPUT_CTL */
+
 rt_weak void rt_hw_console_output(const char *str)
 {
     /* empty console output */
@@ -346,6 +372,11 @@ void rt_kputs(const char *str)
         return;
     }
 
+    if (!rt_console_output_get_enabled())
+    {
+        return;
+    }
+
     _kputs(str, rt_strlen(str));
 }
 
@@ -362,6 +393,11 @@ rt_weak int rt_kprintf(const char *fmt, ...)
     rt_size_t length = 0;
     static char rt_log_buf[RT_CONSOLEBUF_SIZE];
 
+    if (!rt_console_output_get_enabled())
+    {
+        return 0;
+    }
+
     va_start(args, fmt);
     PRINTF_BUFFER_TAKE;