原始版本

RT_Thread/components/drivers/serial/Kconfig

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+menuconfig RT_USING_SERIAL
+    bool "USING Serial device drivers"
+    select RT_USING_DEVICE_IPC
+    select RT_USING_DEVICE
+    default y
+
+    if RT_USING_SERIAL
+        choice
+            prompt "Choice Serial version"
+            default RT_USING_SERIAL_V1
+            config RT_USING_SERIAL_V1
+                bool "RT_USING_SERIAL_V1"
+            config RT_USING_SERIAL_V2
+                bool "RT_USING_SERIAL_V2"
+        endchoice
+        config RT_SERIAL_USING_DMA
+            bool "Enable serial DMA mode"
+            default y
+
+        config RT_SERIAL_RB_BUFSZ
+            int "Set RX buffer size"
+            depends on !RT_USING_SERIAL_V2
+            default 64
+        config RT_USING_SERIAL_BYPASS
+            bool "Using serial bypass"
+            default n
+        endif