Merge pull request #1405 from gregdavill/ch32v307

Add WCH CH32V307 port

15 files changed, 1919 insertions, 0 deletions

diff --git a/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/board.h b/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/board.h
new file mode 100644
index 000000000..0eab34916
--- /dev/null
+++ b/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/board.h
@@ -0,0 +1,50 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2023 Ha Thach (tinyusb.org) for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// LED: need to wire pin LED1 to PC0 in the J3 header
+#define LED_PORT              GPIOC
+#define LED_PIN               GPIO_Pin_0
+#define LED_STATE_ON          0
+#define LED_CLOCK_EN()        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE)
+
+// Button: need to wire pin KEY to PC1 in the J3 header
+#define BUTTON_PORT           GPIOC
+#define BUTTON_PIN            GPIO_Pin_1
+#define BUTTON_STATE_ACTIVE   0
+#define BUTTON_CLOCK_EN()     do { } while(0) // same as LED clock, no need to do anything
+
+// TODO UART port
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
diff --git a/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/board.mk b/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/board.mk
new file mode 100644
index 000000000..4e91d8938
--- /dev/null
+++ b/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/board.mk
@@ -0,0 +1 @@
+LD_FILE = $(FAMILY_PATH)/ch32v307.ld
diff --git a/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/debug_uart.c b/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/debug_uart.c
new file mode 100644
index 000000000..45fc9e3aa
--- /dev/null
+++ b/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/debug_uart.c
@@ -0,0 +1,110 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Greg Davill
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "debug_uart.h"
+#include <ch32v30x.h>
+
+
+#define UART_RINGBUFFER_SIZE_TX 64
+#define UART_RINGBUFFER_MASK_TX (UART_RINGBUFFER_SIZE_TX-1)
+
+static char tx_buf[UART_RINGBUFFER_SIZE_TX];
+static unsigned int tx_produce;
+static volatile unsigned int tx_consume;
+
+void USART1_IRQHandler(void) __attribute__((naked));
+void USART1_IRQHandler(void) { 
+      __asm volatile ("call USART1_IRQHandler_impl; mret");
+}
+
+__attribute__((used)) void USART1_IRQHandler_impl(void)
+{
+	if(USART_GetITStatus(USART1, USART_IT_TC) != RESET)
+    {
+        USART_ClearITPendingBit(USART1, USART_IT_TC);
+
+		if(tx_consume != tx_produce) {
+			USART_SendData(USART1, tx_buf[tx_consume]);
+			tx_consume = (tx_consume + 1) & UART_RINGBUFFER_MASK_TX;
+		}
+    }
+
+}
+
+void uart_write(char c)
+{
+	unsigned int tx_produce_next = (tx_produce + 1) & UART_RINGBUFFER_MASK_TX;
+	
+    NVIC_DisableIRQ(USART1_IRQn);
+    if((tx_consume != tx_produce) || (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)) {
+		tx_buf[tx_produce] = c;
+		tx_produce = tx_produce_next;
+	} else {
+		USART_SendData(USART1, c);
+	}
+    NVIC_EnableIRQ(USART1_IRQn);
+}
+
+
+void uart_sync(void)
+{
+	while(tx_consume != tx_produce);
+}
+
+
+void usart_printf_init(uint32_t baudrate)
+{
+  GPIO_InitTypeDef GPIO_InitStructure;
+  USART_InitTypeDef USART_InitStructure;
+
+  tx_produce = 0;
+  tx_consume = 0;
+
+  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
+
+  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
+  GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+  USART_InitStructure.USART_BaudRate = baudrate;
+  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
+  USART_InitStructure.USART_StopBits = USART_StopBits_1;
+  USART_InitStructure.USART_Parity = USART_Parity_No;
+  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+  USART_InitStructure.USART_Mode = USART_Mode_Tx;
+
+  USART_Init(USART1, &USART_InitStructure);
+  USART_ITConfig(USART1, USART_IT_TC, ENABLE);
+  USART_Cmd(USART1, ENABLE);
+
+  NVIC_InitTypeDef NVIC_InitStructure = { 0 };
+  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
+  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
+  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
+  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+  NVIC_Init(&NVIC_InitStructure);
+}
diff --git a/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/debug_uart.h b/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/debug_uart.h
new file mode 100644
index 000000000..a7e070585
--- /dev/null
+++ b/hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/debug_uart.h
@@ -0,0 +1,31 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Greg Davill
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include <stdint.h>
+
+void uart_write(char c);
+void uart_sync(void);
+void usart_printf_init(uint32_t baudrate);
diff --git a/hw/bsp/ch32v307/ch32v307.ld b/hw/bsp/ch32v307/ch32v307.ld
new file mode 100644
index 000000000..af7c06615
--- /dev/null
+++ b/hw/bsp/ch32v307/ch32v307.ld
@@ -0,0 +1,170 @@
+ENTRY( _start )
+
+__stack_size = 4096;
+
+PROVIDE( _stack_size = __stack_size );
+
+
+MEMORY
+{
+	FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 288K
+	RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 32K
+}
+
+
+SECTIONS
+{
+
+	.init :
+	{
+		_sinit = .;
+		. = ALIGN(4);
+		KEEP(*(SORT_NONE(.init)))
+		. = ALIGN(4);
+		_einit = .;
+	} >FLASH AT>FLASH
+
+  .vector :
+  {
+      *(.vector);
+	  . = ALIGN(64);
+  } >FLASH AT>FLASH
+
+	.text :
+	{
+		. = ALIGN(4);
+		*(.text)
+		*(.text.*)
+		*(.rodata)
+		*(.rodata*)
+		*(.glue_7)
+		*(.glue_7t)
+		*(.gnu.linkonce.t.*)
+		. = ALIGN(4);
+	} >FLASH AT>FLASH 
+
+	.fini :
+	{
+		KEEP(*(SORT_NONE(.fini)))
+		. = ALIGN(4);
+	} >FLASH AT>FLASH
+
+	PROVIDE( _etext = . );
+	PROVIDE( _eitcm = . );	
+
+	.preinit_array  :
+	{
+	  PROVIDE_HIDDEN (__preinit_array_start = .);
+	  KEEP (*(.preinit_array))
+	  PROVIDE_HIDDEN (__preinit_array_end = .);
+	} >FLASH AT>FLASH 
+	
+	.init_array     :
+	{
+	  PROVIDE_HIDDEN (__init_array_start = .);
+	  KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+	  KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
+	  PROVIDE_HIDDEN (__init_array_end = .);
+	} >FLASH AT>FLASH 
+	
+	.fini_array     :
+	{
+	  PROVIDE_HIDDEN (__fini_array_start = .);
+	  KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
+	  KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
+	  PROVIDE_HIDDEN (__fini_array_end = .);
+	} >FLASH AT>FLASH 
+	
+	.ctors          :
+	{
+	  /* gcc uses crtbegin.o to find the start of
+	     the constructors, so we make sure it is
+	     first.  Because this is a wildcard, it
+	     doesn't matter if the user does not
+	     actually link against crtbegin.o; the
+	     linker won't look for a file to match a
+	     wildcard.  The wildcard also means that it
+	     doesn't matter which directory crtbegin.o
+	     is in.  */
+	  KEEP (*crtbegin.o(.ctors))
+	  KEEP (*crtbegin?.o(.ctors))
+	  /* We don't want to include the .ctor section from
+	     the crtend.o file until after the sorted ctors.
+	     The .ctor section from the crtend file contains the
+	     end of ctors marker and it must be last */
+	  KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+	  KEEP (*(SORT(.ctors.*)))
+	  KEEP (*(.ctors))
+	} >FLASH AT>FLASH 
+	
+	.dtors          :
+	{
+	  KEEP (*crtbegin.o(.dtors))
+	  KEEP (*crtbegin?.o(.dtors))
+	  KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+	  KEEP (*(SORT(.dtors.*)))
+	  KEEP (*(.dtors))
+	} >FLASH AT>FLASH 
+
+	.dalign :
+	{
+		. = ALIGN(4);
+		PROVIDE(_data_vma = .);
+	} >RAM AT>FLASH	
+
+	.dlalign :
+	{
+		. = ALIGN(4); 
+		PROVIDE(_data_lma = .);
+	} >FLASH AT>FLASH
+
+	.data :
+	{
+    	*(.gnu.linkonce.r.*)
+    	*(.data .data.*)
+    	*(.gnu.linkonce.d.*)
+		. = ALIGN(8);
+    	PROVIDE( __global_pointer$ = . + 0x800 );
+    	*(.sdata .sdata.*)
+		*(.sdata2.*)
+    	*(.gnu.linkonce.s.*)
+    	. = ALIGN(8);
+    	*(.srodata.cst16)
+    	*(.srodata.cst8)
+    	*(.srodata.cst4)
+    	*(.srodata.cst2)
+    	*(.srodata .srodata.*)
+    	. = ALIGN(4);
+		PROVIDE( _edata = .);
+	} >RAM AT>FLASH
+
+	.bss :
+	{
+		. = ALIGN(4);
+		PROVIDE( _sbss = .);
+  	    *(.sbss*)
+        *(.gnu.linkonce.sb.*)
+		*(.bss*)
+     	*(.gnu.linkonce.b.*)		
+		*(COMMON*)
+		. = ALIGN(4);
+		PROVIDE( _ebss = .);
+	} >RAM AT>FLASH
+
+	PROVIDE( _end = _ebss);
+	PROVIDE( end = . );
+
+    .stack ORIGIN(RAM) + LENGTH(RAM) - __stack_size :
+    {
+        PROVIDE( _heap_end = . );    
+        . = ALIGN(4);
+        PROVIDE(_susrstack = . );
+        . = . + __stack_size;
+        PROVIDE( _eusrstack = .);
+        __freertos_irq_stack_top = .;
+    } >RAM 
+
+}
+
+
+
diff --git a/hw/bsp/ch32v307/ch32v30x_conf.h b/hw/bsp/ch32v307/ch32v30x_conf.h
new file mode 100644
index 000000000..399feaf68
--- /dev/null
+++ b/hw/bsp/ch32v307/ch32v30x_conf.h
@@ -0,0 +1,43 @@
+/********************************** (C) COPYRIGHT *******************************
+* File Name          : ch32v30x_conf.h
+* Author             : WCH
+* Version            : V1.0.0
+* Date               : 2021/06/06
+* Description        : Library configuration file.
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* SPDX-License-Identifier: Apache-2.0
+*******************************************************************************/ 
+#ifndef __CH32V30x_CONF_H
+#define __CH32V30x_CONF_H
+
+#include "ch32v30x_adc.h"
+#include "ch32v30x_bkp.h"
+#include "ch32v30x_can.h"
+#include "ch32v30x_crc.h"
+#include "ch32v30x_dac.h"
+#include "ch32v30x_dbgmcu.h"
+#include "ch32v30x_dma.h"
+#include "ch32v30x_exti.h"
+#include "ch32v30x_flash.h"
+#include "ch32v30x_fsmc.h"
+#include "ch32v30x_gpio.h"
+#include "ch32v30x_i2c.h"
+#include "ch32v30x_iwdg.h"
+#include "ch32v30x_pwr.h"
+#include "ch32v30x_rcc.h"
+#include "ch32v30x_rtc.h"
+#include "ch32v30x_sdio.h"
+#include "ch32v30x_spi.h"
+#include "ch32v30x_tim.h"
+#include "ch32v30x_usart.h"
+#include "ch32v30x_wwdg.h"
+#include "ch32v30x_it.h"
+#include "ch32v30x_misc.h"
+
+
+#endif /* __CH32V30x_CONF_H */
+
+
+	
+	
+	
diff --git a/hw/bsp/ch32v307/ch32v30x_it.c b/hw/bsp/ch32v307/ch32v30x_it.c
new file mode 100644
index 000000000..d348dd989
--- /dev/null
+++ b/hw/bsp/ch32v307/ch32v30x_it.c
@@ -0,0 +1,49 @@
+/********************************** (C) COPYRIGHT *******************************
+* File Name          : ch32v30x_it.c
+* Author             : WCH
+* Version            : V1.0.0
+* Date               : 2021/06/06
+* Description        : Main Interrupt Service Routines.
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* SPDX-License-Identifier: Apache-2.0
+*******************************************************************************/
+#include "ch32v30x_it.h"
+
+void NMI_Handler(void) __attribute__((naked));
+void HardFault_Handler(void) __attribute__((naked));
+
+/*********************************************************************
+ * @fn      NMI_Handler
+ *
+ * @brief   This function handles NMI exception.
+ *
+ * @return  none
+ */
+void NMI_Handle(void){
+      __asm volatile ("call NMI_Handler_impl; mret");
+}
+
+__attribute__((used)) void NMI_Handler_impl(void)
+{
+
+}
+
+/*********************************************************************
+ * @fn      HardFault_Handler
+ *
+ * @brief   This function handles Hard Fault exception.
+ *
+ * @return  none
+ */
+void HardFault_Handler(void){
+      __asm volatile ("call HardFault_Handler_impl; mret");
+}
+
+__attribute__((used)) void HardFault_Handler_impl(void)
+{
+  while (1)
+  {
+  }
+}
+
+
diff --git a/hw/bsp/ch32v307/ch32v30x_it.h b/hw/bsp/ch32v307/ch32v30x_it.h
new file mode 100644
index 000000000..42f285edf
--- /dev/null
+++ b/hw/bsp/ch32v307/ch32v30x_it.h
@@ -0,0 +1,18 @@
+/********************************** (C) COPYRIGHT *******************************
+* File Name          : ch32v30x_it.h
+* Author             : WCH
+* Version            : V1.0.0
+* Date               : 2021/06/06
+* Description        : This file contains the headers of the interrupt handlers.
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* SPDX-License-Identifier: Apache-2.0
+*******************************************************************************/
+#ifndef __CH32V30x_IT_H
+#define __CH32V30x_IT_H
+
+// #include "debug.h"
+
+
+#endif /* __CH32V30x_IT_H */
+
+
diff --git a/hw/bsp/ch32v307/core_riscv.h b/hw/bsp/ch32v307/core_riscv.h
new file mode 100644
index 000000000..2e94ec683
--- /dev/null
+++ b/hw/bsp/ch32v307/core_riscv.h
@@ -0,0 +1,384 @@
+/********************************** (C) COPYRIGHT  *******************************
+* File Name          : core_riscv.h
+* Author             : WCH
+* Version            : V1.0.0
+* Date               : 2021/06/06
+* Description        : RISC-V Core Peripheral Access Layer Header File for CH32V30x
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* SPDX-License-Identifier: Apache-2.0
+*******************************************************************************/
+#ifndef __CORE_RISCV_H__
+#define __CORE_RISCV_H__
+
+/* IO definitions */
+#ifdef __cplusplus
+  #define     __I     volatile                /* defines 'read only' permissions */
+#else
+  #define     __I     volatile const          /* defines 'read only' permissions */
+#endif
+#define     __O     volatile                  /* defines 'write only' permissions */
+#define     __IO    volatile                  /* defines 'read / write' permissions */
+
+/* Standard Peripheral Library old types (maintained for legacy purpose) */
+typedef __I uint64_t vuc64;  /* Read Only */
+typedef __I uint32_t vuc32;  /* Read Only */
+typedef __I uint16_t vuc16;  /* Read Only */
+typedef __I uint8_t vuc8;   /* Read Only */
+
+typedef const uint64_t uc64;  /* Read Only */
+typedef const uint32_t uc32;  /* Read Only */
+typedef const uint16_t uc16;  /* Read Only */
+typedef const uint8_t uc8;   /* Read Only */
+
+typedef __I int64_t vsc64;  /* Read Only */
+typedef __I int32_t vsc32;  /* Read Only */
+typedef __I int16_t vsc16;  /* Read Only */
+typedef __I int8_t vsc8;   /* Read Only */
+
+typedef const int64_t sc64;  /* Read Only */
+typedef const int32_t sc32;  /* Read Only */
+typedef const int16_t sc16;  /* Read Only */
+typedef const int8_t sc8;   /* Read Only */
+
+typedef __IO uint64_t  vu64;
+typedef __IO uint32_t  vu32;
+typedef __IO uint16_t vu16;
+typedef __IO uint8_t  vu8;
+
+typedef uint64_t  u64;
+typedef uint32_t  u32;
+typedef uint16_t u16;
+typedef uint8_t  u8;
+
+typedef __IO int64_t  vs64;
+typedef __IO int32_t  vs32;
+typedef __IO int16_t  vs16;
+typedef __IO int8_t   vs8;
+
+typedef int64_t  s64;
+typedef int32_t  s32;
+typedef int16_t s16;
+typedef int8_t  s8;
+
+typedef enum {ERROR = 0, SUCCESS = !ERROR} ErrorStatus;
+
+typedef enum {DISABLE = 0, ENABLE = !DISABLE} FunctionalState;
+
+typedef enum {RESET = 0, SET = !RESET} FlagStatus, ITStatus;
+
+#define   RV_STATIC_INLINE  static  inline
+
+/* memory mapped structure for Program Fast Interrupt Controller (PFIC) */
+typedef struct{
+  __I  uint32_t ISR[8];
+  __I  uint32_t IPR[8];
+  __IO uint32_t ITHRESDR;
+  __IO uint32_t RESERVED;
+  __IO uint32_t CFGR;
+  __I  uint32_t GISR;
+  uint8_t VTFIDR[4];
+  uint8_t RESERVED0[12];
+  __IO uint32_t VTFADDR[4];
+  uint8_t RESERVED1[0x90];
+  __O  uint32_t IENR[8];
+  uint8_t RESERVED2[0x60];
+  __O  uint32_t IRER[8];
+  uint8_t RESERVED3[0x60];
+  __O  uint32_t IPSR[8];
+  uint8_t RESERVED4[0x60];
+  __O  uint32_t IPRR[8];
+  uint8_t RESERVED5[0x60];
+  __IO uint32_t IACTR[8];
+  uint8_t RESERVED6[0xE0];
+  __IO uint8_t IPRIOR[256];
+  uint8_t RESERVED7[0x810];
+  __IO uint32_t SCTLR;
+}PFIC_Type;
+
+/* memory mapped structure for SysTick */
+typedef struct
+{
+    __IO u32 CTLR;
+    __IO u32 SR;
+    __IO u64 CNT;
+    __IO u64 CMP;
+}SysTick_Type;
+
+
+#define PFIC            ((PFIC_Type *) 0xE000E000 )
+#define NVIC            PFIC
+#define NVIC_KEY1       ((uint32_t)0xFA050000)
+#define	NVIC_KEY2				((uint32_t)0xBCAF0000)
+#define	NVIC_KEY3				((uint32_t)0xBEEF0000)
+
+#define SysTick         ((SysTick_Type *) 0xE000F000)
+
+
+/*********************************************************************
+ * @fn      __enable_irq
+ *
+ * @brief   Enable Global Interrupt
+ *
+ * @return  none
+ */
+RV_STATIC_INLINE void __enable_irq(void)
+{
+  __asm volatile ("csrw 0x800, %0" : : "r" (0x6088) );
+}
+
+/*********************************************************************
+ * @fn      __disable_irq
+ *
+ * @brief   Disable Global Interrupt
+ *
+ * @return  none
+ */
+RV_STATIC_INLINE void __disable_irq(void)
+{
+  __asm volatile ("csrw 0x800, %0" : : "r" (0x6000) );
+}
+
+/*********************************************************************
+ * @fn      __NOP
+ *
+ * @brief   nop
+ *
+ * @return  none
+ */
+RV_STATIC_INLINE void __NOP(void)
+{
+  __asm volatile ("nop");
+}
+
+/*********************************************************************
+ * @fn      NVIC_EnableIRQ
+ *
+ * @brief   Enable Interrupt
+ *
+ * @param   IRQn: Interrupt Numbers
+ *
+ * @return  none
+ */
+RV_STATIC_INLINE void NVIC_EnableIRQ(IRQn_Type IRQn)
+{
+  NVIC->IENR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F));
+}
+
+/*********************************************************************
+ * @fn      NVIC_DisableIRQ
+ *
+ * @brief   Disable Interrupt
+ *
+ * @param   IRQn: Interrupt Numbers
+ *
+ * @return  none
+ */
+RV_STATIC_INLINE void NVIC_DisableIRQ(IRQn_Type IRQn)
+{
+  NVIC->IRER[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F));
+}
+
+/*********************************************************************
+ * @fn      NVIC_GetStatusIRQ
+ *
+ * @brief   Get Interrupt Enable State
+ *
+ * @param   IRQn: Interrupt Numbers
+ *
+ * @return  1 - Interrupt Enable
+ *          0 - Interrupt Disable
+ */
+RV_STATIC_INLINE uint32_t NVIC_GetStatusIRQ(IRQn_Type IRQn)
+{
+  return((uint32_t) ((NVIC->ISR[(uint32_t)(IRQn) >> 5] & (1 << ((uint32_t)(IRQn) & 0x1F)))?1:0));
+}
+
+/*********************************************************************
+ * @fn      NVIC_GetPendingIRQ
+ *
+ * @brief   Get Interrupt Pending State
+ *
+ * @param   IRQn: Interrupt Numbers
+ *
+ * @return  1 - Interrupt Pending Enable
+ *          0 - Interrupt Pending Disable
+ */
+RV_STATIC_INLINE uint32_t NVIC_GetPendingIRQ(IRQn_Type IRQn)
+{
+  return((uint32_t) ((NVIC->IPR[(uint32_t)(IRQn) >> 5] & (1 << ((uint32_t)(IRQn) & 0x1F)))?1:0));
+}
+
+/*********************************************************************
+ * @fn      NVIC_SetPendingIRQ
+ *
+ * @brief   Set Interrupt Pending
+ *
+ * @param   IRQn: Interrupt Numbers
+ *
+ * @return  None
+ */
+RV_STATIC_INLINE void NVIC_SetPendingIRQ(IRQn_Type IRQn)
+{
+  NVIC->IPSR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F));
+}
+
+/*********************************************************************
+ * @fn      NVIC_ClearPendingIRQ
+ *
+ * @brief   Clear Interrupt Pending
+ *
+ * @param   IRQn: Interrupt Numbers
+ *
+ * @return  None
+ */
+RV_STATIC_INLINE void NVIC_ClearPendingIRQ(IRQn_Type IRQn)
+{
+  NVIC->IPRR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F));
+}
+
+/*********************************************************************
+ * @fn      NVIC_GetActive
+ *
+ * @brief   Get Interrupt Active State
+ *
+ * @param   IRQn: Interrupt Numbers
+ *
+ * @return  1 - Interrupt Active
+ *          0 - Interrupt No Active
+ */
+RV_STATIC_INLINE uint32_t NVIC_GetActive(IRQn_Type IRQn)
+{
+  return((uint32_t)((NVIC->IACTR[(uint32_t)(IRQn) >> 5] & (1 << ((uint32_t)(IRQn) & 0x1F)))?1:0));
+}
+
+/*********************************************************************
+ * @fn      NVIC_SetPriority
+ *
+ * @brief   Set Interrupt Priority
+ *
+ * @param   IRQn - Interrupt Numbers
+ *          priority -
+ *              bit7 - pre-emption priority
+ *              bit6~bit4 - subpriority
+ * @return  None
+ */
+RV_STATIC_INLINE void NVIC_SetPriority(IRQn_Type IRQn, uint8_t priority)
+{
+  NVIC->IPRIOR[(uint32_t)(IRQn)] = priority;
+}
+
+/*********************************************************************
+ * @fn      __WFI
+ *
+ * @brief   Wait for Interrupt
+ *
+ * @return  None
+ */
+__attribute__( ( always_inline ) ) RV_STATIC_INLINE void __WFI(void)
+{
+  NVIC->SCTLR &= ~(1<<3);	// wfi
+  asm volatile ("wfi");
+}
+
+/*********************************************************************
+ * @fn      __WFE
+ *
+ * @brief   Wait for Events
+ *
+ * @return  None
+ */
+__attribute__( ( always_inline ) ) RV_STATIC_INLINE void __WFE(void)
+{
+  uint32_t t;
+
+  t = NVIC->SCTLR;
+  NVIC->SCTLR |= (1<<3)|(1<<5);		// (wfi->wfe)+(__sev)
+  NVIC->SCTLR = (NVIC->SCTLR & ~(1<<5)) | ( t & (1<<5));
+  asm volatile ("wfi");
+  asm volatile ("wfi");
+}
+
+/*********************************************************************
+ * @fn      SetVTFIRQ
+ *
+ * @brief   Set VTF Interrupt
+ *
+ * @param   add - VTF interrupt service function base address.
+ *          IRQn -Interrupt Numbers
+ *          num - VTF Interrupt Numbers
+ *          NewState - DISABLE or ENABLE
+ * @return  None
+ */
+RV_STATIC_INLINE void SetVTFIRQ(uint32_t addr, IRQn_Type IRQn, uint8_t num, FunctionalState NewState){
+  if(num > 3)  return ;
+
+  if (NewState != DISABLE)
+  {
+      NVIC->VTFIDR[num] = IRQn;
+      NVIC->VTFADDR[num] = ((addr&0xFFFFFFFE)|0x1);
+  }
+  else{
+      NVIC->VTFIDR[num] = IRQn;
+      NVIC->VTFADDR[num] = ((addr&0xFFFFFFFE)&(~0x1));
+  }
+}
+
+/*********************************************************************
+ * @fn      NVIC_SystemReset
+ *
+ * @brief   Initiate a system reset request
+ *
+ * @return  None
+ */
+RV_STATIC_INLINE void NVIC_SystemReset(void)
+{
+  NVIC->CFGR = NVIC_KEY3|(1<<7);
+}
+
+
+/* Core_Exported_Functions */  
+extern uint32_t __get_FFLAGS(void);
+extern void __set_FFLAGS(uint32_t value);
+extern uint32_t __get_FRM(void);
+extern void __set_FRM(uint32_t value);
+extern uint32_t __get_FCSR(void);
+extern void __set_FCSR(uint32_t value);
+extern uint32_t __get_MSTATUS(void);
+extern void __set_MSTATUS(uint32_t value);
+extern uint32_t __get_MISA(void);
+extern void __set_MISA(uint32_t value);
+extern uint32_t __get_MIE(void);
+extern void __set_MIE(uint32_t value);
+extern uint32_t __get_MTVEC(void);
+extern void __set_MTVEC(uint32_t value);
+extern uint32_t __get_MSCRATCH(void);
+extern void __set_MSCRATCH(uint32_t value);
+extern uint32_t __get_MEPC(void);
+extern void __set_MEPC(uint32_t value);
+extern uint32_t __get_MCAUSE(void);
+extern void __set_MCAUSE(uint32_t value);
+extern uint32_t __get_MTVAL(void);
+extern void __set_MTVAL(uint32_t value);
+extern uint32_t __get_MIP(void);
+extern void __set_MIP(uint32_t value);
+extern uint32_t __get_MCYCLE(void);
+extern void __set_MCYCLE(uint32_t value);
+extern uint32_t __get_MCYCLEH(void);
+extern void __set_MCYCLEH(uint32_t value);
+extern uint32_t __get_MINSTRET(void);
+extern void __set_MINSTRET(uint32_t value);
+extern uint32_t __get_MINSTRETH(void);
+extern void __set_MINSTRETH(uint32_t value);
+extern uint32_t __get_MVENDORID(void);
+extern uint32_t __get_MARCHID(void);
+extern uint32_t __get_MIMPID(void);
+extern uint32_t __get_MHARTID(void);
+extern uint32_t __get_SP(void);
+
+
+#endif
+
+
+
+
+
diff --git a/hw/bsp/ch32v307/family.c b/hw/bsp/ch32v307/family.c
new file mode 100644
index 000000000..d5602c7b4
--- /dev/null
+++ b/hw/bsp/ch32v307/family.c
@@ -0,0 +1,178 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Greg Davill
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "stdio.h"
+#include "debug_uart.h"
+#include "ch32v30x.h"
+
+#include "bsp/board.h"
+#include "board.h"
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+
+void USBHS_IRQHandler (void) __attribute__((naked));
+void USBHS_IRQHandler (void)
+{
+  __asm volatile ("call USBHS_IRQHandler_impl; mret");
+}
+
+__attribute__ ((used)) void USBHS_IRQHandler_impl (void)
+{
+  tud_int_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
+
+uint32_t SysTick_Config(uint32_t ticks)
+{
+  NVIC_EnableIRQ(SysTicK_IRQn);
+  SysTick->CTLR=0;
+  SysTick->SR=0;
+  SysTick->CNT=0;
+  SysTick->CMP=ticks-1;
+  SysTick->CTLR=0xF;
+  return 0;
+}
+
+void board_init(void) {
+
+  /* Disable interrupts during init */
+  __disable_irq();
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  SysTick_Config(SystemCoreClock / 1000);
+#endif
+
+	usart_printf_init(115200);
+
+  RCC_USBCLK48MConfig(RCC_USBCLK48MCLKSource_USBPHY);
+  RCC_USBHSPLLCLKConfig(RCC_HSBHSPLLCLKSource_HSE);
+  RCC_USBHSConfig(RCC_USBPLL_Div2);
+  RCC_USBHSPLLCKREFCLKConfig(RCC_USBHSPLLCKREFCLK_4M);
+  RCC_USBHSPHYPLLALIVEcmd(ENABLE);
+  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_USBHS, ENABLE);
+
+  GPIO_InitTypeDef GPIO_InitStructure = {0};
+
+  // LED
+  LED_CLOCK_EN();
+  GPIO_InitStructure.GPIO_Pin = LED_PIN;
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+  GPIO_Init(LED_PORT, &GPIO_InitStructure);
+
+  // Button
+  BUTTON_CLOCK_EN();
+  GPIO_InitStructure.GPIO_Pin = BUTTON_PIN;
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+  GPIO_Init(BUTTON_PORT, &GPIO_InitStructure);
+
+  /* Enable interrupts globally */
+  __enable_irq();
+
+  board_delay(2);
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+
+volatile uint32_t system_ticks = 0;
+
+/* Small workaround to support HW stack save/restore */
+void SysTick_Handler (void) __attribute__((naked));
+void SysTick_Handler (void)
+{
+  __asm volatile ("call SysTick_Handler_impl; mret");
+}
+
+__attribute__((used)) void SysTick_Handler_impl (void)
+{
+  SysTick->SR = 0;
+  system_ticks++;
+}
+
+uint32_t board_millis (void)
+{
+  return system_ticks;
+}
+
+#endif
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write (bool state)
+{
+  GPIO_WriteBit(LED_PORT, LED_PIN, state);
+}
+
+uint32_t board_button_read (void)
+{
+  return BUTTON_STATE_ACTIVE == GPIO_ReadInputDataBit(BUTTON_PORT, BUTTON_PIN);
+}
+
+int board_uart_read (uint8_t *buf, int len)
+{
+  (void) buf;
+  (void) len;
+  return 0;
+}
+
+int board_uart_write (void const *buf, int len)
+{
+  int txsize = len;
+  while ( txsize-- )
+  {
+    uart_write(*(uint8_t const*) buf);
+    buf++;
+  }
+  return len;
+}
+
+
+
+#ifdef USE_FULL_ASSERT
+/**
+ * @brief  Reports the name of the source file and the source line number
+ *         where the assert_param error has occurred.
+ * @param  file: pointer to the source file name
+ * @param  line: assert_param error line source number
+ * @retval None
+ */
+void assert_failed(char* file, uint32_t line) {
+  /* USER CODE BEGIN 6 */
+  /* User can add his own implementation to report the file name and line
+     number,
+     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line)
+   */
+  /* USER CODE END 6 */
+}
+#endif /* USE_FULL_ASSERT */
diff --git a/hw/bsp/ch32v307/family.mk b/hw/bsp/ch32v307/family.mk
new file mode 100644
index 000000000..15f6724a8
--- /dev/null
+++ b/hw/bsp/ch32v307/family.mk
@@ -0,0 +1,64 @@
+# https://www.embecosm.com/resources/tool-chain-downloads/#riscv-stable
+#CROSS_COMPILE ?= riscv32-unknown-elf-
+
+# Toolchain from https://github.com/xpack-dev-tools/riscv-none-embed-gcc-xpack
+CROSS_COMPILE ?= riscv-none-embed-
+
+# Submodules
+CH32V307_SDK = hw/mcu/wch/ch32v307
+DEPS_SUBMODULES += $(CH32V307_SDK)
+
+# WCH-SDK paths
+CH32V307_SDK_SRC = $(CH32V307_SDK)/EVT/EXAM/SRC
+
+include $(TOP)/$(BOARD_PATH)/board.mk
+
+CFLAGS += \
+	-flto \
+	-march=rv32imac \
+	-mabi=ilp32 \
+	-msmall-data-limit=8 \
+	-mno-save-restore -Os \
+	-fmessage-length=0 \
+	-fsigned-char \
+	-ffunction-sections \
+	-fdata-sections \
+	-nostdlib -nostartfiles \
+	-DCFG_TUSB_MCU=OPT_MCU_CH32V307 \
+	-Xlinker --gc-sections \
+	-DBOARD_TUD_MAX_SPEED=OPT_MODE_HIGH_SPEED
+
+SRC_C += \
+	src/portable/wch/ch32v307/dcd_usbhs.c \
+	$(CH32V307_SDK_SRC)/Core/core_riscv.c \
+	$(CH32V307_SDK_SRC)/Peripheral/src/ch32v30x_gpio.c \
+	$(CH32V307_SDK_SRC)/Peripheral/src/ch32v30x_misc.c \
+	$(CH32V307_SDK_SRC)/Peripheral/src/ch32v30x_rcc.c \
+	$(CH32V307_SDK_SRC)/Peripheral/src/ch32v30x_usart.c 
+	
+SRC_S += \
+	$(CH32V307_SDK_SRC)/Startup/startup_ch32v30x_D8C.S 
+
+INC += \
+	$(TOP)/$(BOARD_PATH) \
+	$(TOP)/$(CH32V307_SDK_SRC)/Peripheral/inc
+
+# For freeRTOS port source
+FREERTOS_PORT = RISC-V
+
+# wch-link is not supported yet in official openOCD yet. We need to either use
+# 1. download openocd as part of mounriver studio http://www.mounriver.com/download or
+# 2. compiled from modified source https://github.com/kprasadvnsi/riscv-openocd-wch
+#
+# Note: For Linux, somehow openocd in mounriver studio does not seem to have wch-link enable, 
+# therefore we need to compile it from source as follows:
+# 	git clone https://github.com/kprasadvnsi/riscv-openocd-wch
+# 	cd riscv-openocd-wch
+#		./bootstrap
+#		./configure CFLAGS="-Wno-error" --enable-wlink
+#		make
+# openocd binaries will be generated in riscv-openocd-wch/src
+
+# flash target ROM bootloader
+flash: $(BUILD)/$(PROJECT).elf
+	openocd -f $(TOP)/$(FAMILY_PATH)/wch-riscv.cfg -c init -c halt -c "program $<" -c wlink_reset_resume -c exit
diff --git a/hw/bsp/ch32v307/system_ch32v30x.c b/hw/bsp/ch32v307/system_ch32v30x.c
new file mode 100644
index 000000000..12b18d7b8
--- /dev/null
+++ b/hw/bsp/ch32v307/system_ch32v30x.c
@@ -0,0 +1,776 @@
+/********************************** (C) COPYRIGHT *******************************
+* File Name          : system_ch32v30x.c
+* Author             : WCH
+* Version            : V1.0.0
+* Date               : 2021/06/06
+* Description        : CH32V30x Device Peripheral Access Layer System Source File.
+*                      For HSE = 8Mhz
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* SPDX-License-Identifier: Apache-2.0
+*********************************************************************************/
+#include "ch32v30x.h" 
+
+/* 
+* Uncomment the line corresponding to the desired System clock (SYSCLK) frequency (after 
+* reset the HSI is used as SYSCLK source).
+* If none of the define below is enabled, the HSI is used as System clock source. 
+*/
+// #define SYSCLK_FREQ_HSE    HSE_VALUE
+/* #define SYSCLK_FREQ_24MHz  24000000  */ 
+//#define SYSCLK_FREQ_48MHz  48000000
+/* #define SYSCLK_FREQ_56MHz  56000000  */  
+//#define SYSCLK_FREQ_72MHz  72000000
+//#define SYSCLK_FREQ_96MHz  96000000
+//#define SYSCLK_FREQ_120MHz  120000000
+#define SYSCLK_FREQ_144MHz  144000000
+
+/* Clock Definitions */
+#ifdef SYSCLK_FREQ_HSE
+  uint32_t SystemCoreClock         = SYSCLK_FREQ_HSE;          /* System Clock Frequency (Core Clock) */
+#elif defined SYSCLK_FREQ_24MHz
+  uint32_t SystemCoreClock         = SYSCLK_FREQ_24MHz;        /* System Clock Frequency (Core Clock) */
+#elif defined SYSCLK_FREQ_48MHz
+  uint32_t SystemCoreClock         = SYSCLK_FREQ_48MHz;        /* System Clock Frequency (Core Clock) */
+#elif defined SYSCLK_FREQ_56MHz
+  uint32_t SystemCoreClock         = SYSCLK_FREQ_56MHz;        /* System Clock Frequency (Core Clock) */
+#elif defined SYSCLK_FREQ_72MHz
+  uint32_t SystemCoreClock         = SYSCLK_FREQ_72MHz;        /* System Clock Frequency (Core Clock) */
+
+#elif defined SYSCLK_FREQ_96MHz
+  uint32_t SystemCoreClock         = SYSCLK_FREQ_96MHz;        /* System Clock Frequency (Core Clock) */
+#elif defined SYSCLK_FREQ_120MHz
+  uint32_t SystemCoreClock         = SYSCLK_FREQ_120MHz;        /* System Clock Frequency (Core Clock) */
+#elif defined SYSCLK_FREQ_144MHz
+  uint32_t SystemCoreClock         = SYSCLK_FREQ_144MHz;        /* System Clock Frequency (Core Clock) */
+
+#else /* HSI Selected as System Clock source */
+  uint32_t SystemCoreClock         = HSI_VALUE;                /* System Clock Frequency (Core Clock) */
+#endif
+
+__I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
+
+
+/* system_private_function_proto_types */
+static void SetSysClock(void);
+
+#ifdef SYSCLK_FREQ_HSE
+  static void SetSysClockToHSE(void);
+#elif defined SYSCLK_FREQ_24MHz
+  static void SetSysClockTo24(void);
+#elif defined SYSCLK_FREQ_48MHz
+  static void SetSysClockTo48(void);
+#elif defined SYSCLK_FREQ_56MHz
+  static void SetSysClockTo56(void);  
+#elif defined SYSCLK_FREQ_72MHz
+  static void SetSysClockTo72(void);
+
+#elif defined SYSCLK_FREQ_96MHz
+  static void SetSysClockTo96(void);
+#elif defined SYSCLK_FREQ_120MHz
+  static void SetSysClockTo120(void);
+#elif defined SYSCLK_FREQ_144MHz
+  static void SetSysClockTo144(void);
+
+#endif
+
+
+/*********************************************************************
+ * @fn      SystemInit
+ *
+ * @brief   Setup the microcontroller system Initialize the Embedded Flash Interface,
+ *        the PLL and update the SystemCoreClock variable.
+ *
+ * @return  none
+ */
+void SystemInit (void)
+{
+  RCC->CTLR |= (uint32_t)0x00000001;
+
+#ifdef CH32V30x_D8C
+  RCC->CFGR0 &= (uint32_t)0xF8FF0000;
+#else
+  RCC->CFGR0 &= (uint32_t)0xF0FF0000;
+#endif 
+
+  RCC->CTLR &= (uint32_t)0xFEF6FFFF;
+  RCC->CTLR &= (uint32_t)0xFFFBFFFF;
+  RCC->CFGR0 &= (uint32_t)0xFF80FFFF;
+
+#ifdef CH32V30x_D8C
+  RCC->CTLR &= (uint32_t)0xEBFFFFFF;
+  RCC->INTR = 0x00FF0000;
+  RCC->CFGR2 = 0x00000000;
+#else
+  RCC->INTR = 0x009F0000;   
+#endif   
+  SetSysClock();
+}
+
+/*********************************************************************
+ * @fn      SystemCoreClockUpdate
+ *
+ * @brief   Update SystemCoreClock variable according to Clock Register Values.
+ *
+ * @return  none
+ */
+void SystemCoreClockUpdate (void)
+{
+  uint32_t tmp = 0, pllmull = 0, pllsource = 0, Pll_6_5 = 0;
+
+  tmp = RCC->CFGR0 & RCC_SWS;
+  
+  switch (tmp)
+  {
+    case 0x00:
+      SystemCoreClock = HSI_VALUE;
+      break;
+    case 0x04:  
+      SystemCoreClock = HSE_VALUE;
+      break;
+    case 0x08: 
+      pllmull = RCC->CFGR0 & RCC_PLLMULL;
+      pllsource = RCC->CFGR0 & RCC_PLLSRC; 
+      pllmull = ( pllmull >> 18) + 2;
+
+#ifdef CH32V30x_D8
+          if(pllmull == 17) pllmull = 18;
+#else
+          if(pllmull == 2) pllmull = 18;
+          if(pllmull == 15){
+              pllmull = 13;  /* *6.5 */
+              Pll_6_5 = 1;
+          }
+          if(pllmull == 16) pllmull = 15;
+          if(pllmull == 17) pllmull = 16;
+#endif
+
+      if (pllsource == 0x00)
+      {
+        SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
+      }
+      else
+      {    
+        if ((RCC->CFGR0 & RCC_PLLXTPRE) != (uint32_t)RESET)
+        {
+          SystemCoreClock = (HSE_VALUE >> 1) * pllmull;
+        }
+        else
+        {
+          SystemCoreClock = HSE_VALUE * pllmull;
+        }
+      }
+
+      if(Pll_6_5 == 1) SystemCoreClock = (SystemCoreClock / 2);
+
+      break;
+    default:
+      SystemCoreClock = HSI_VALUE;
+      break;
+  }
+ 
+  tmp = AHBPrescTable[((RCC->CFGR0 & RCC_HPRE) >> 4)];
+  SystemCoreClock >>= tmp;  
+}
+
+/*********************************************************************
+ * @fn      SetSysClock
+ *
+ * @brief   Configures the System clock frequency, HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClock(void)
+{
+#ifdef SYSCLK_FREQ_HSE
+  SetSysClockToHSE();
+#elif defined SYSCLK_FREQ_24MHz
+  SetSysClockTo24();
+#elif defined SYSCLK_FREQ_48MHz
+  SetSysClockTo48();
+#elif defined SYSCLK_FREQ_56MHz
+  SetSysClockTo56();  
+#elif defined SYSCLK_FREQ_72MHz
+  SetSysClockTo72();
+#elif defined SYSCLK_FREQ_96MHz
+  SetSysClockTo96();
+#elif defined SYSCLK_FREQ_120MHz
+  SetSysClockTo120();
+#elif defined SYSCLK_FREQ_144MHz
+  SetSysClockTo144();
+
+#endif
+ 
+ /* If none of the define above is enabled, the HSI is used as System clock
+  * source (default after reset) 
+    */
+}
+
+
+#ifdef SYSCLK_FREQ_HSE
+
+/*********************************************************************
+ * @fn      SetSysClockToHSE
+ *
+ * @brief   Sets HSE as System clock source and configure HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClockToHSE(void)
+{
+  __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
+   
+  RCC->CTLR |= ((uint32_t)RCC_HSEON);
+ 
+  /* Wait till HSE is ready and if Time out is reached exit */
+  do
+  {
+    HSEStatus = RCC->CTLR & RCC_HSERDY;
+    StartUpCounter++;  
+  } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
+
+  if ((RCC->CTLR & RCC_HSERDY) != RESET)
+  {
+    HSEStatus = (uint32_t)0x01;
+  }
+  else
+  {
+    HSEStatus = (uint32_t)0x00;
+  }  
+
+  if (HSEStatus == (uint32_t)0x01)
+  {
+    /* HCLK = SYSCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;      
+    /* PCLK2 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
+    /* PCLK1 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV1;
+    
+    /* Select HSE as system clock source */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
+    RCC->CFGR0 |= (uint32_t)RCC_SW_HSE;    
+
+    /* Wait till HSE is used as system clock source */
+    while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x04)
+    {
+    }
+  }
+  else
+  { 
+        /* If HSE fails to start-up, the application will have wrong clock
+     * configuration. User can add here some code to deal with this error 
+         */
+  }  
+}
+
+#elif defined SYSCLK_FREQ_24MHz
+
+/*********************************************************************
+ * @fn      SetSysClockTo24
+ *
+ * @brief   Sets System clock frequency to 24MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClockTo24(void)
+{
+  __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
+     
+  RCC->CTLR |= ((uint32_t)RCC_HSEON);
+ 
+  /* Wait till HSE is ready and if Time out is reached exit */
+  do
+  {
+    HSEStatus = RCC->CTLR & RCC_HSERDY;
+    StartUpCounter++;  
+  } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
+
+  if ((RCC->CTLR & RCC_HSERDY) != RESET)
+  {
+    HSEStatus = (uint32_t)0x01;
+  }
+  else
+  {
+    HSEStatus = (uint32_t)0x00;
+  }  
+  if (HSEStatus == (uint32_t)0x01)
+  {
+    /* HCLK = SYSCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;   
+    /* PCLK2 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1; 
+    /* PCLK1 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV1;
+
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
+
+#ifdef CH32V30x_D8
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL3);
+#else
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL3_EXTEN);
+#endif
+    /* Enable PLL */
+    RCC->CTLR |= RCC_PLLON;
+
+    /* Wait till PLL is ready */
+    while((RCC->CTLR & RCC_PLLRDY) == 0)
+    {
+    }
+    /* Select PLL as system clock source */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
+    RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;    
+    /* Wait till PLL is used as system clock source */
+    while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
+    {
+    }
+  }
+  else
+  { 
+        /* If HSE fails to start-up, the application will have wrong clock
+     * configuration. User can add here some code to deal with this error 
+         */
+  } 
+}
+
+#elif defined SYSCLK_FREQ_48MHz
+
+/*********************************************************************
+ * @fn      SetSysClockTo48
+ *
+ * @brief   Sets System clock frequency to 48MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClockTo48(void)
+{
+  __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
+     
+   
+  RCC->CTLR |= ((uint32_t)RCC_HSEON);
+  /* Wait till HSE is ready and if Time out is reached exit */
+  do
+  {
+    HSEStatus = RCC->CTLR & RCC_HSERDY;
+    StartUpCounter++;  
+  } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
+
+  if ((RCC->CTLR & RCC_HSERDY) != RESET)
+  {
+    HSEStatus = (uint32_t)0x01;
+  }
+  else
+  {
+    HSEStatus = (uint32_t)0x00;
+  }  
+
+  if (HSEStatus == (uint32_t)0x01)
+  {
+    /* HCLK = SYSCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;    
+    /* PCLK2 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;  
+    /* PCLK1 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
+
+    /*  PLL configuration: PLLCLK = HSE * 6 = 48 MHz */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
+
+#ifdef CH32V30x_D8
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL6);
+#else
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL6_EXTEN);
+#endif
+
+    /* Enable PLL */
+    RCC->CTLR |= RCC_PLLON;
+    /* Wait till PLL is ready */
+    while((RCC->CTLR & RCC_PLLRDY) == 0)
+    {
+    }
+    /* Select PLL as system clock source */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
+    RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;    
+    /* Wait till PLL is used as system clock source */
+    while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
+    {
+    }
+  }
+  else
+  { 
+        /*
+         * If HSE fails to start-up, the application will have wrong clock
+     * configuration. User can add here some code to deal with this error 
+         */
+  } 
+}
+
+#elif defined SYSCLK_FREQ_56MHz
+
+/*********************************************************************
+ * @fn      SetSysClockTo56
+ *
+ * @brief   Sets System clock frequency to 56MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClockTo56(void)
+{
+  __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
+     
+  RCC->CTLR |= ((uint32_t)RCC_HSEON);
+
+  /* Wait till HSE is ready and if Time out is reached exit */
+  do
+  {
+    HSEStatus = RCC->CTLR & RCC_HSERDY;
+    StartUpCounter++;  
+  } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
+
+  if ((RCC->CTLR & RCC_HSERDY) != RESET)
+  {
+    HSEStatus = (uint32_t)0x01;
+  }
+  else
+  {
+    HSEStatus = (uint32_t)0x00;
+  }  
+
+  if (HSEStatus == (uint32_t)0x01)
+  {
+    /* HCLK = SYSCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;   
+    /* PCLK2 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
+    /* PCLK1 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
+  
+    /* PLL configuration: PLLCLK = HSE * 7 = 56 MHz */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
+
+#ifdef CH32V30x_D8
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL7);
+#else
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL7_EXTEN);
+#endif
+
+    /* Enable PLL */
+    RCC->CTLR |= RCC_PLLON;
+    /* Wait till PLL is ready */
+    while((RCC->CTLR & RCC_PLLRDY) == 0)
+    {
+    }
+
+    /* Select PLL as system clock source */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
+    RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;    
+    /* Wait till PLL is used as system clock source */
+    while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
+    {
+    }
+  }
+  else
+  { 
+        /*
+         * If HSE fails to start-up, the application will have wrong clock
+     * configuration. User can add here some code to deal with this error 
+         */
+  } 
+}
+
+#elif defined SYSCLK_FREQ_72MHz
+
+/*********************************************************************
+ * @fn      SetSysClockTo72
+ *
+ * @brief   Sets System clock frequency to 72MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClockTo72(void)
+{
+  __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
+     
+  RCC->CTLR |= ((uint32_t)RCC_HSEON);
+ 
+  /* Wait till HSE is ready and if Time out is reached exit */
+  do
+  {
+    HSEStatus = RCC->CTLR & RCC_HSERDY;
+    StartUpCounter++;  
+  } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
+
+  if ((RCC->CTLR & RCC_HSERDY) != RESET)
+  {
+    HSEStatus = (uint32_t)0x01;
+  }
+  else
+  {
+    HSEStatus = (uint32_t)0x00;
+  }  
+
+  if (HSEStatus == (uint32_t)0x01)
+  {
+    /* HCLK = SYSCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1; 
+    /* PCLK2 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1; 
+    /* PCLK1 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
+ 
+    /* PLL configuration: PLLCLK = HSE * 9 = 72 MHz */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE |
+                                        RCC_PLLMULL));
+
+#ifdef CH32V30x_D8
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL9);
+#else
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL9_EXTEN);
+#endif
+
+    /* Enable PLL */
+    RCC->CTLR |= RCC_PLLON;
+    /* Wait till PLL is ready */
+    while((RCC->CTLR & RCC_PLLRDY) == 0)
+    {
+    }    
+    /* Select PLL as system clock source */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
+    RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;    
+    /* Wait till PLL is used as system clock source */
+    while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
+    {
+    }
+  }
+  else
+  { 
+        /*
+         * If HSE fails to start-up, the application will have wrong clock
+     * configuration. User can add here some code to deal with this error 
+         */
+  }
+}
+
+
+#elif defined SYSCLK_FREQ_96MHz
+
+/*********************************************************************
+ * @fn      SetSysClockTo96
+ *
+ * @brief   Sets System clock frequency to 96MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClockTo96(void)
+{
+  __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
+
+  RCC->CTLR |= ((uint32_t)RCC_HSEON);
+
+  /* Wait till HSE is ready and if Time out is reached exit */
+  do
+  {
+    HSEStatus = RCC->CTLR & RCC_HSERDY;
+    StartUpCounter++;
+  } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
+
+  if ((RCC->CTLR & RCC_HSERDY) != RESET)
+  {
+    HSEStatus = (uint32_t)0x01;
+  }
+  else
+  {
+    HSEStatus = (uint32_t)0x00;
+  }
+
+  if (HSEStatus == (uint32_t)0x01)
+  {
+    /* HCLK = SYSCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
+    /* PCLK2 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
+    /* PCLK1 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
+
+    /*  PLL configuration: PLLCLK = HSE * 12 = 96 MHz */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE |
+                                        RCC_PLLMULL));
+
+#ifdef CH32V30x_D8
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL12);
+#else
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL12_EXTEN);
+#endif
+
+    /* Enable PLL */
+    RCC->CTLR |= RCC_PLLON;
+    /* Wait till PLL is ready */
+    while((RCC->CTLR & RCC_PLLRDY) == 0)
+    {
+    }
+    /* Select PLL as system clock source */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
+    RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
+    /* Wait till PLL is used as system clock source */
+    while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
+    {
+    }
+  }
+  else
+  {
+        /*
+         * If HSE fails to start-up, the application will have wrong clock
+     * configuration. User can add here some code to deal with this error
+         */
+  }
+}
+
+
+#elif defined SYSCLK_FREQ_120MHz
+
+/*********************************************************************
+ * @fn      SetSysClockTo120
+ *
+ * @brief   Sets System clock frequency to 120MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClockTo120(void)
+{
+  __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
+
+  RCC->CTLR |= ((uint32_t)RCC_HSEON);
+
+  /* Wait till HSE is ready and if Time out is reached exit */
+  do
+  {
+    HSEStatus = RCC->CTLR & RCC_HSERDY;
+    StartUpCounter++;
+  } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
+
+  if ((RCC->CTLR & RCC_HSERDY) != RESET)
+  {
+    HSEStatus = (uint32_t)0x01;
+  }
+  else
+  {
+    HSEStatus = (uint32_t)0x00;
+  }
+
+  if (HSEStatus == (uint32_t)0x01)
+  {
+    /* HCLK = SYSCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
+    /* PCLK2 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
+    /* PCLK1 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
+
+    /*  PLL configuration: PLLCLK = HSE * 15 = 120 MHz */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE |
+                                        RCC_PLLMULL));
+
+#ifdef CH32V30x_D8
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL15);
+#else
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL15_EXTEN);
+#endif
+
+    /* Enable PLL */
+    RCC->CTLR |= RCC_PLLON;
+    /* Wait till PLL is ready */
+    while((RCC->CTLR & RCC_PLLRDY) == 0)
+    {
+    }
+    /* Select PLL as system clock source */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
+    RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
+    /* Wait till PLL is used as system clock source */
+    while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
+    {
+    }
+  }
+  else
+  {
+        /*
+         * If HSE fails to start-up, the application will have wrong clock
+     * configuration. User can add here some code to deal with this error
+         */
+  }
+}
+
+
+#elif defined SYSCLK_FREQ_144MHz
+
+/*********************************************************************
+ * @fn      SetSysClockTo144
+ *
+ * @brief   Sets System clock frequency to 144MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
+ *
+ * @return  none
+ */
+static void SetSysClockTo144(void)
+{
+  __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
+
+  RCC->CTLR |= ((uint32_t)RCC_HSEON);
+
+  /* Wait till HSE is ready and if Time out is reached exit */
+  do
+  {
+    HSEStatus = RCC->CTLR & RCC_HSERDY;
+    StartUpCounter++;
+  } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
+
+  if ((RCC->CTLR & RCC_HSERDY) != RESET)
+  {
+    HSEStatus = (uint32_t)0x01;
+  }
+  else
+  {
+    HSEStatus = (uint32_t)0x00;
+  }
+
+  if (HSEStatus == (uint32_t)0x01)
+  {
+    /* HCLK = SYSCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
+    /* PCLK2 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
+    /* PCLK1 = HCLK */
+    RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
+
+    /*  PLL configuration: PLLCLK = HSE * 18 = 144 MHz */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE |
+                                        RCC_PLLMULL));
+
+#ifdef CH32V30x_D8
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL18);
+#else
+        RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL18_EXTEN);
+#endif
+
+    /* Enable PLL */
+    RCC->CTLR |= RCC_PLLON;
+    /* Wait till PLL is ready */
+    while((RCC->CTLR & RCC_PLLRDY) == 0)
+    {
+    }
+    /* Select PLL as system clock source */
+    RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
+    RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
+    /* Wait till PLL is used as system clock source */
+    while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
+    {
+    }
+  }
+  else
+  {
+        /*
+         * If HSE fails to start-up, the application will have wrong clock
+     * configuration. User can add here some code to deal with this error
+         */
+  }
+}
+
+
+#endif
diff --git a/hw/bsp/ch32v307/system_ch32v30x.h b/hw/bsp/ch32v307/system_ch32v30x.h
new file mode 100644
index 000000000..0e0ef4e51
--- /dev/null
+++ b/hw/bsp/ch32v307/system_ch32v30x.h
@@ -0,0 +1,30 @@
+/********************************** (C) COPYRIGHT *******************************
+* File Name          : system_ch32v30x.h
+* Author             : WCH
+* Version            : V1.0.0
+* Date               : 2021/06/06
+* Description        : CH32V30x Device Peripheral Access Layer System Header File.
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* SPDX-License-Identifier: Apache-2.0
+*******************************************************************************/
+#ifndef __SYSTEM_CH32V30x_H 
+#define __SYSTEM_CH32V30x_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif 
+
+extern uint32_t SystemCoreClock;          /* System Clock Frequency (Core Clock) */
+
+/* System_Exported_Functions */  
+extern void SystemInit(void);
+extern void SystemCoreClockUpdate(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__CH32V30x_SYSTEM_H */
+
+
+
diff --git a/hw/bsp/ch32v307/wch-riscv.cfg b/hw/bsp/ch32v307/wch-riscv.cfg
new file mode 100644
index 000000000..0d24d16ca
--- /dev/null
+++ b/hw/bsp/ch32v307/wch-riscv.cfg
@@ -0,0 +1,15 @@
+#interface wlink
+adapter driver wlink
+wlink_set
+set _CHIPNAME riscv
+jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id 0x00001
+
+set _TARGETNAME $_CHIPNAME.cpu
+
+target create $_TARGETNAME.0 riscv -chain-position $_TARGETNAME
+$_TARGETNAME.0 configure  -work-area-phys 0x80000000 -work-area-size 10000 -work-area-backup 1
+set _FLASHNAME $_CHIPNAME.flash
+
+flash bank $_FLASHNAME wch_riscv 0x00000000 0 0 0 $_TARGETNAME.0
+
+echo "Ready for Remote Connections"
diff --git a/hw/mcu/wch/ch32v307 b/hw/mcu/wch/ch32v307
new file mode 160000
+Subproject 17761f5cf9dbbf2dcf665b7c04934188add2008