diff --git a/os/src/driver/gpio/led.rs b/os/src/driver/gpio/led.rs
index 6fa12ed..10d43c5 100644
--- a/os/src/driver/gpio/led.rs
+++ b/os/src/driver/gpio/led.rs
@@ -5,6 +5,7 @@ use k210_soc::{
 
 pub fn init() {
     // led b 映射到 gpiohs 0
+    // io::LED_B 为物理 pin
     fpioa::set_function(io::LED_B, fpioa::function::GPIOHS0);
     // gpiohs 设置 0 为输出
     gpiohs::set_direction(0, gpio::direction::OUTPUT);
diff --git a/os/src/driver/gpio/led_ex.rs b/os/src/driver/gpio/led_ex.rs
index b632f7e..037954e 100644
--- a/os/src/driver/gpio/led_ex.rs
+++ b/os/src/driver/gpio/led_ex.rs
@@ -1 +1,23 @@
-// 外部的 led
\ No newline at end of file
+// 外部的 led
+
+use k210_soc::{
+    fpioa::{self, io},
+    gpio, gpiohs,
+};
+
+pub fn init() {
+    // led b 映射到 gpiohs 0
+    // 9
+    fpioa::set_function(io::BPSK_P, fpioa::function::GPIOHS0);
+    // 10
+    fpioa::set_function(io::BPSK_N, fpioa::function::GPIOHS1);
+    // gpiohs 设置 0 为输出
+    gpiohs::set_direction(0, gpio::direction::OUTPUT);
+    gpiohs::set_direction(1, gpio::direction::OUTPUT);
+
+    gpiohs::set_pin(0, false);
+    gpiohs::set_pin(1, true);
+    
+    println!("0 is {}", gpiohs::get_pin(0));
+    println!("1 is {}", gpiohs::get_pin(1));
+}
diff --git a/os/src/driver/gpio/led_gpio.rs b/os/src/driver/gpio/led_gpio.rs
index e69de29..e538879 100644
--- a/os/src/driver/gpio/led_gpio.rs
+++ b/os/src/driver/gpio/led_gpio.rs
@@ -0,0 +1,14 @@
+use k210_soc::{
+    fpioa::{self, io},
+    gpio, gpiohs,
+};
+
+pub fn init() {
+    // led b 映射到 gpiohs 0
+    fpioa::set_function(io::LED_R, fpioa::function::GPIOHS5);
+    // gpiohs 设置 0 为输出
+    gpiohs::set_direction(5, gpio::direction::OUTPUT);
+    // gpiohs 0 为 false , false 为点亮
+    gpiohs::set_pin(5, false);
+    println!("0 is {}", gpiohs::get_pin(5));
+}
diff --git a/os/src/driver/gpio/mod.rs b/os/src/driver/gpio/mod.rs
index 53c0d72..a5cbeb3 100644
--- a/os/src/driver/gpio/mod.rs
+++ b/os/src/driver/gpio/mod.rs
@@ -1,4 +1,4 @@
-mod led;
+mod led_ex;
 pub fn init() {
-    led::init();
+    led_ex::init();
 }