diff --git a/src/arduino/ports/ch32/Adafruit_TinyUSB_ch32.cpp b/src/arduino/ports/ch32/Adafruit_TinyUSB_ch32.cpp
index 00e06921..8fd9bea1 100644
--- a/src/arduino/ports/ch32/Adafruit_TinyUSB_ch32.cpp
+++ b/src/arduino/ports/ch32/Adafruit_TinyUSB_ch32.cpp
@@ -60,7 +60,12 @@ USBWakeUp_IRQHandler(void) {
 // USBFS
 #if CFG_TUD_WCH_USBIP_USBFS
 
-#ifdef CH32V20x
+#if defined(CH32V10x) || defined(CH32V20x)
+
+#if defined(CH32V10x)
+#define USBHDWakeUp_IRQHandler USBWakeUp_IRQHandler
+#endif
+
 __attribute__((interrupt("WCH-Interrupt-fast"))) void USBHD_IRQHandler(void) {
   tud_int_handler(0);
 }
@@ -101,23 +106,43 @@ void yield(void) {
 void TinyUSB_Port_InitDevice(uint8_t rhport) {
 #if CFG_TUD_WCH_USBIP_FSDEV || CFG_TUD_WCH_USBIP_USBFS
   // Full speed OTG or FSDev
+
+#if defined(CH32V10x)
+  EXTEN->EXTEN_CTR |= EXTEN_USBHD_IO_EN;
+  EXTEN->EXTEN_CTR &= ~EXTEN_USB_5V_SEL;
+
+#define RCC_AHBPeriph_OTG_FS RCC_AHBPeriph_USBHD
+#endif
+
   uint8_t usb_div;
   switch (SystemCoreClock) {
+#if defined(CH32V20x) || defined(CH32V30x)
   case 48000000:
-    usb_div = 0; // div1
-    break;
+    usb_div = 0;
+    break; // div1
   case 96000000:
-    usb_div = 1; // div2
-    break;
+    usb_div = 1;
+    break; // div2
   case 144000000:
-    usb_div = 2; // div3
+    usb_div = 2;
+    break; // div3
+#elif defined(CH32V10x)
+  case 48000000:
+    usb_div = RCC_USBCLKSource_PLLCLK_Div1;
+    break;
+  case 72000000:
+    usb_div = RCC_USBCLKSource_PLLCLK_1Div5;
     break;
+#endif
   default:
     return; // unsupported
   }
-  // RCC_USBCLKConfig(usb_div) or RCC_OTGFSCLKConfig(usb_div)
-  RCC->CFGR0 &= ~(3 << 22);
-  RCC->CFGR0 |= usb_div << 22;
+
+#if defined(CH32V30x)
+  RCC_OTGFSCLKConfig(usb_div);
+#else
+  RCC_USBCLKConfig(usb_div);
+#endif
 
 #if CFG_TUD_WCH_USBIP_FSDEV
   RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, ENABLE);
diff --git a/src/arduino/ports/ch32/tusb_config_ch32.h b/src/arduino/ports/ch32/tusb_config_ch32.h
index 3bb0eb6b..f8e2ef90 100644
--- a/src/arduino/ports/ch32/tusb_config_ch32.h
+++ b/src/arduino/ports/ch32/tusb_config_ch32.h
@@ -32,12 +32,13 @@ extern "C" {
 //--------------------------------------------------------------------
 // COMMON CONFIGURATION
 //--------------------------------------------------------------------
-#if defined(CH32V20x)
+#if defined(CH32V10x)
+#define CFG_TUSB_MCU OPT_MCU_CH32V103
+#warnning "CH32v103 is not working yet"
+#elif defined(CH32V20x)
 #define CFG_TUSB_MCU OPT_MCU_CH32V20X
-
 #elif defined(CH32V30x)
 #define CFG_TUSB_MCU OPT_MCU_CH32V307
-
 #endif
 
 #define CFG_TUSB_OS OPT_OS_NONE
diff --git a/src/common/tusb_mcu.h b/src/common/tusb_mcu.h
index ba04f460..eb49eddf 100644
--- a/src/common/tusb_mcu.h
+++ b/src/common/tusb_mcu.h
@@ -420,6 +420,15 @@
   #define TUP_RHPORT_HIGHSPEED    CFG_TUD_WCH_USBIP_USBHS
   #define TUP_DCD_ENDPOINT_MAX    (CFG_TUD_WCH_USBIP_USBHS ? 16 : 8)
 
+#elif TU_CHECK_MCU(OPT_MCU_CH32V103)
+  #define TUP_USBIP_WCH_USBFS
+
+  #if !defined(CFG_TUD_WCH_USBIP_USBFS)
+  #define CFG_TUD_WCH_USBIP_USBFS 1
+  #endif
+
+  #define TUP_DCD_ENDPOINT_MAX    8
+
 #elif TU_CHECK_MCU(OPT_MCU_CH32V20X)
   // v20x support both FSDEV (USBD) and USBFS, default to FSDEV
   #define TUP_USBIP_WCH_USBFS
diff --git a/src/portable/st/stm32_fsdev/fsdev_ch32.h b/src/portable/st/stm32_fsdev/fsdev_ch32.h
index 85fe3266..f63a80d5 100644
--- a/src/portable/st/stm32_fsdev/fsdev_ch32.h
+++ b/src/portable/st/stm32_fsdev/fsdev_ch32.h
@@ -36,11 +36,21 @@
 
 #include "common/tusb_compiler.h"
 
-#if CFG_TUSB_MCU == OPT_MCU_CH32V20X
-  #include <ch32v20x.h>
+// https://github.com/openwch/ch32v307/pull/90
+// https://github.com/openwch/ch32v20x/pull/12
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstrict-prototypes"
+#endif
 
-#elif CFG_TUSB_MCU == OPT_MCU_CH32F20X
+#if CFG_TUSB_MCU == OPT_MCU_CH32F20X
   #include <ch32f20x.h>
+#elif CFG_TUSB_MCU == OPT_MCU_CH32V20X
+  #include <ch32v20x.h>
+#endif
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
 #endif
 
 #define FSDEV_PMA_SIZE (512u)
diff --git a/src/portable/wch/ch32_usbfs_reg.h b/src/portable/wch/ch32_usbfs_reg.h
index 0a50a616..68be64f5 100644
--- a/src/portable/wch/ch32_usbfs_reg.h
+++ b/src/portable/wch/ch32_usbfs_reg.h
@@ -28,15 +28,79 @@
 #ifndef USB_CH32_USBFS_REG_H
 #define USB_CH32_USBFS_REG_H
 
-#if CFG_TUSB_MCU == OPT_MCU_CH32V307
-  #include <ch32v30x.h>
-  #define USBHD_IRQn OTG_FS_IRQn
+// https://github.com/openwch/ch32v307/pull/90
+// https://github.com/openwch/ch32v20x/pull/12
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstrict-prototypes"
+#endif
+
+#if CFG_TUSB_MCU == OPT_MCU_CH32F20X
+  #include <ch32f20x.h>
+#elif CFG_TUSB_MCU == OPT_MCU_CH32V103
+  #include <ch32v10x.h>
+  typedef struct
+  {
+    __IO uint8_t  BASE_CTRL;
+    __IO uint8_t  UDEV_CTRL;
+    __IO uint8_t  INT_EN;
+    __IO uint8_t  DEV_ADDR;
+    __IO uint8_t  Reserve0;
+    __IO uint8_t  MIS_ST;
+    __IO uint8_t  INT_FG;
+    __IO uint8_t  INT_ST;
+    __IO uint32_t RX_LEN;
+    __IO uint8_t  UEP4_1_MOD;
+    __IO uint8_t  UEP2_3_MOD;
+    __IO uint8_t  UEP5_6_MOD;
+    __IO uint8_t  UEP7_MOD;
+    __IO uint32_t UEP0_DMA;
+    __IO uint32_t UEP1_DMA;
+    __IO uint32_t UEP2_DMA;
+    __IO uint32_t UEP3_DMA;
+    __IO uint32_t UEP4_DMA;
+    __IO uint32_t UEP5_DMA;
+    __IO uint32_t UEP6_DMA;
+    __IO uint32_t UEP7_DMA;
+    __IO uint16_t UEP0_TX_LEN;
+    __IO uint8_t  UEP0_TX_CTRL;
+    __IO uint8_t  UEP0_RX_CTRL;
+    __IO uint16_t UEP1_TX_LEN;
+    __IO uint8_t  UEP1_TX_CTRL;
+    __IO uint8_t  UEP1_RX_CTRL;
+    __IO uint16_t UEP2_TX_LEN;
+    __IO uint8_t  UEP2_TX_CTRL;
+    __IO uint8_t  UEP2_RX_CTRL;
+    __IO uint16_t UEP3_TX_LEN;
+    __IO uint8_t  UEP3_TX_CTRL;
+    __IO uint8_t  UEP3_RX_CTRL;
+    __IO uint16_t UEP4_TX_LEN;
+    __IO uint8_t  UEP4_TX_CTRL;
+    __IO uint8_t  UEP4_RX_CTRL;
+    __IO uint16_t UEP5_TX_LEN;
+    __IO uint8_t  UEP5_TX_CTRL;
+    __IO uint8_t  UEP5_RX_CTRL;
+    __IO uint16_t UEP6_TX_LEN;
+    __IO uint8_t  UEP6_TX_CTRL;
+    __IO uint8_t  UEP6_RX_CTRL;
+    __IO uint16_t UEP7_TX_LEN;
+    __IO uint8_t  UEP7_TX_CTRL;
+    __IO uint8_t  UEP7_RX_CTRL;
+    __IO uint32_t Reserve1;
+    __IO uint32_t OTG_CR;
+    __IO uint32_t OTG_SR;
+  } USBOTG_FS_TypeDef;
 
+  #define USBOTG_FS ((USBOTG_FS_TypeDef *) 0x40023400)
 #elif CFG_TUSB_MCU == OPT_MCU_CH32V20X
   #include <ch32v20x.h>
+#elif CFG_TUSB_MCU == OPT_MCU_CH32V307
+  #include <ch32v30x.h>
+  #define USBHD_IRQn OTG_FS_IRQn
+#endif
 
-#elif CFG_TUSB_MCU == OPT_MCU_CH32F20X
-  #include <ch32f20x.h>
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
 #endif
 
 // CTRL
diff --git a/src/portable/wch/ch32_usbhs_reg.h b/src/portable/wch/ch32_usbhs_reg.h
index 130e4f22..87300b49 100644
--- a/src/portable/wch/ch32_usbhs_reg.h
+++ b/src/portable/wch/ch32_usbhs_reg.h
@@ -28,12 +28,24 @@
 #ifndef USB_CH32_USBHS_REG_H
 #define USB_CH32_USBHS_REG_H
 
+// https://github.com/openwch/ch32v307/pull/90
+// https://github.com/openwch/ch32v20x/pull/12
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstrict-prototypes"
+#endif
+
 #if CFG_TUSB_MCU == OPT_MCU_CH32V307
   #include <ch32v30x.h>
 #elif CFG_TUSB_MCU == OPT_MCU_CH32F20X
   #include <ch32f20x.h>
 #endif
 
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
+
 /******************* GLOBAL ******************/
 
 // USB CONTROL
diff --git a/src/tusb_option.h b/src/tusb_option.h
index b6f27b5d..611aaca3 100644
--- a/src/tusb_option.h
+++ b/src/tusb_option.h
@@ -182,7 +182,7 @@
 #define OPT_MCU_CH32V307         2200 ///< WCH CH32V307
 #define OPT_MCU_CH32F20X         2210 ///< WCH CH32F20x
 #define OPT_MCU_CH32V20X         2220 ///< WCH CH32V20X
-
+#define OPT_MCU_CH32V103         2230 ///< WCH CH32V103
 
 // NXP LPC MCX
 #define OPT_MCU_MCXN9            2300  ///< NXP MCX N9 Series