diff --git a/hw/bsp/nutiny_nuc121s/board.mk b/hw/bsp/nutiny_nuc121s/board.mk
index ec4966cb0..893c8500a 100644
--- a/hw/bsp/nutiny_nuc121s/board.mk
+++ b/hw/bsp/nutiny_nuc121s/board.mk
@@ -51,5 +51,7 @@ FREERTOS_PORT = ARM_CM0
 JLINK_DEVICE = NUC121SC2AE
 JLINK_IF = swd
 
-# flash using jlink
-flash: flash-jlink
+# Flash using Nuvoton's openocd fork at https://github.com/OpenNuvoton/OpenOCD-Nuvoton
+# Please compile and install it from github source
+flash: $(BUILD)/$(BOARD)-firmware.elf
+	openocd -f interface/nulink.cfg -f target/numicroM0.cfg -c "program $< reset exit"
diff --git a/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c b/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c
index 51ca28a82..dfa67206b 100644
--- a/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c
+++ b/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c
@@ -29,6 +29,11 @@
 #include "clk.h"
 #include "sys.h"
 
+#define LED_PORT              PB
+#define LED_PIN               4
+#define LED_PIN_IO            PB4
+#define LED_STATE_ON          0
+
 void board_init(void)
 {
   /* Unlock protected registers */
@@ -60,6 +65,9 @@ void board_init(void)
   // 1ms tick timer
   SysTick_Config(48000000 / 1000);
 #endif
+
+  // LED
+  GPIO_SetMode(LED_PORT, 1 << LED_PIN, GPIO_MODE_OUTPUT);
 }
 
 #if CFG_TUSB_OS  == OPT_OS_NONE
@@ -81,7 +89,7 @@ uint32_t board_millis(void)
 
 void board_led_write(bool state)
 {
-  (void)(state);
+  LED_PIN_IO = (state ? LED_STATE_ON : (1-LED_STATE_ON));
 }
 
 uint32_t board_button_read(void)
diff --git a/hw/bsp/nutiny_nuc125s/board.mk b/hw/bsp/nutiny_nuc125s/board.mk
index 6329ca7cf..e2eecff12 100644
--- a/hw/bsp/nutiny_nuc125s/board.mk
+++ b/hw/bsp/nutiny_nuc125s/board.mk
@@ -13,7 +13,8 @@ LD_FILE = hw/bsp/nutiny_nuc125s/nuc125_flash.ld
 
 SRC_C += \
   hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Source/system_NUC121.c \
-  hw/mcu/nuvoton/nuc121_125/StdDriver/src/clk.c
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/clk.c \
+    hw/mcu/nuvoton/nuc121_125/StdDriver/src/gpio.c
 
 SRC_S += \
   hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Source/GCC/startup_NUC121.S
@@ -34,5 +35,7 @@ FREERTOS_PORT = ARM_CM0
 JLINK_DEVICE = NUC125SC2AE
 JLINK_IF = swd
 
-# flash using jlink
-flash: flash-jlink
+# Flash using Nuvoton's openocd fork at https://github.com/OpenNuvoton/OpenOCD-Nuvoton
+# Please compile and install it from github source
+flash: $(BUILD)/$(BOARD)-firmware.elf
+	openocd -f interface/nulink.cfg -f target/numicroM0.cfg -c "program $< reset exit"
diff --git a/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c b/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c
index 51ca28a82..dfa67206b 100644
--- a/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c
+++ b/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c
@@ -29,6 +29,11 @@
 #include "clk.h"
 #include "sys.h"
 
+#define LED_PORT              PB
+#define LED_PIN               4
+#define LED_PIN_IO            PB4
+#define LED_STATE_ON          0
+
 void board_init(void)
 {
   /* Unlock protected registers */
@@ -60,6 +65,9 @@ void board_init(void)
   // 1ms tick timer
   SysTick_Config(48000000 / 1000);
 #endif
+
+  // LED
+  GPIO_SetMode(LED_PORT, 1 << LED_PIN, GPIO_MODE_OUTPUT);
 }
 
 #if CFG_TUSB_OS  == OPT_OS_NONE
@@ -81,7 +89,7 @@ uint32_t board_millis(void)
 
 void board_led_write(bool state)
 {
-  (void)(state);
+  LED_PIN_IO = (state ? LED_STATE_ON : (1-LED_STATE_ON));
 }
 
 uint32_t board_button_read(void)
diff --git a/hw/bsp/nutiny_nuc126v/board.mk b/hw/bsp/nutiny_nuc126v/board.mk
index d38e6c4d5..cc88b5529 100644
--- a/hw/bsp/nutiny_nuc126v/board.mk
+++ b/hw/bsp/nutiny_nuc126v/board.mk
@@ -55,5 +55,7 @@ FREERTOS_PORT = ARM_CM0
 JLINK_DEVICE = NUC126VG4AE
 JLINK_IF = swd
 
-# flash using jlink
-flash: flash-jlink
+# Flash using Nuvoton's openocd fork at https://github.com/OpenNuvoton/OpenOCD-Nuvoton
+# Please compile and install it from github source
+flash: $(BUILD)/$(BOARD)-firmware.elf
+	openocd -f interface/nulink.cfg -f target/numicroM0.cfg -c "program $< reset exit"
diff --git a/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c b/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c
index 0ce787d3e..bdc154559 100644
--- a/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c
+++ b/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c
@@ -29,6 +29,11 @@
 #include "clk.h"
 #include "sys.h"
 
+#define LED_PORT              PC
+#define LED_PIN               9
+#define LED_PIN_IO            PC9
+#define LED_STATE_ON          0
+
 #define CRYSTAL_LESS /* system will be 48MHz when defined, otherwise, system is 72MHz */
 #define HIRC48_AUTO_TRIM    SYS_IRCTCTL1_REFCKSEL_Msk | (1UL << SYS_IRCTCTL1_LOOPSEL_Pos) | (2UL << SYS_IRCTCTL1_FREQSEL_Pos)
 #define TRIM_INIT           (SYS_BASE+0x118)
@@ -91,6 +96,9 @@ void board_init(void)
   // 1ms tick timer
   SysTick_Config(48000000 / 1000);
 #endif
+
+  // LED
+  GPIO_SetMode(LED_PORT, 1 << LED_PIN, GPIO_MODE_OUTPUT);
 }
 
 #if CFG_TUSB_OS  == OPT_OS_NONE
@@ -112,7 +120,7 @@ uint32_t board_millis(void)
 
 void board_led_write(bool state)
 {
-  (void)(state);
+  LED_PIN_IO = (state ? LED_STATE_ON : (1-LED_STATE_ON));
 }
 
 uint32_t board_button_read(void)