1、在stm32f103xe.h 文件中，在FLASH_TypeDef 结构体中，增加MODEKEYR 成员定义。
修改后如下图所示：

2、目前CH32F103 的FLASH 最大为64K，在chflash.c文件中，修改ValidAddrEnd。
修改后如下图所示：

注：大容量芯片可以相应修改ValidAddrEnd的“0x10000”数据即可

3、上述步骤完成后，即可执行单次128字节的编程，编写Flash_Test_Fast()函数，测试单次128字节编程。

备注：
chflash.c文件

  
#include "chflash.h"
#include "delay.h"
#include "usart.h"
define ACR_LATENCY_Mask         ((uint32_t)0x00000038)
define ACR_HLFCYA_Mask          ((uint32_t)0xFFFFFFF7)
define ACR_PRFTBE_Mask          ((uint32_t)0xFFFFFFEF)
/* Flash Access Control Register bits */
define ACR_PRFTBS_Mask          ((uint32_t)0x00000020)
/* Flash Control Register bits */
define CR_PG_Set                ((uint32_t)0x00000001)
define CR_PG_Reset              ((uint32_t)0x00001FFE)
define CR_PER_Set               ((uint32_t)0x00000002)
define CR_PER_Reset             ((uint32_t)0x00001FFD)
define CR_MER_Set               ((uint32_t)0x00000004)
define CR_MER_Reset             ((uint32_t)0x00001FFB)
define CR_OPTPG_Set             ((uint32_t)0x00000010)
define CR_OPTPG_Reset           ((uint32_t)0x00001FEF)
define CR_OPTER_Set             ((uint32_t)0x00000020)
define CR_OPTER_Reset           ((uint32_t)0x00001FDF)
define CR_STRT_Set              ((uint32_t)0x00000040)
define CR_LOCK_Set              ((uint32_t)0x00000080)
define CR_PAGE_PG 	             ((uint32_t)0x00010000)
define CR_PAGE_ER				       ((uint32_t)0x00020000)
define CR_BUF_LOAD 	           ((uint32_t)0x00040000)
define CR_BUF_RST 					     ((uint32_t)0x00080000)
/* FLASH Status Register bits */
define SR_BSY 					         ((uint32_t)0x00000001)
define SR_PGERR 					       ((uint32_t)0x00000004)
define SR_WRPRTERR 					   ((uint32_t)0x00000010)
define SR_EOP 					         ((uint32_t)0x00000020)
/* FLASH Mask */
define RDPRT_Mask               ((uint32_t)0x00000002)
define WRP0_Mask                ((uint32_t)0x000000FF)
define WRP1_Mask                ((uint32_t)0x0000FF00)
define WRP2_Mask                ((uint32_t)0x00FF0000)
define WRP3_Mask                ((uint32_t)0xFF000000)
define OB_USER_BFB2             ((uint16_t)0x0008)
/* FLASH Keys */
define RDP_Key                  ((uint16_t)0x00A5)
//#define FLASH_KEY1               ((uint32_t)0x45670123)

//#define FLASH_KEY2               ((uint32_t)0xCDEF89AB)
/* FLASH BANK address */
define FLASH_BANK1_END_ADDRESS  ((uint32_t)0x807FFFF)
/* Delay definition */
define EraseTimeout             ((uint32_t)0x000B0000)
define ProgramTimeout           ((uint32_t)0x00002000)
/* Flash Program Vaild Address */
define ValidAddrStart           (FLASH_BASE)
define ValidAddrEnd             (FLASH_BASE + 0x10000)
/*********************************************************************


@fn      FLASH_Unlock_Fast



@brief   Unlocks the Fast Program Erase Mode.



@return  none

/

void FLASH_Unlock_Fast( void )

{

/ Authorize the FPEC of Bank1 Access */

FLASH->KEYR = FLASH_KEY1;

FLASH->KEYR = FLASH_KEY2;
/* Fast program mode unlock */

FLASH->MODEKEYR = FLASH_KEY1;

FLASH->MODEKEYR = FLASH_KEY2;

}


/*********************************************************************

@fn      FLASH_Lock_Fast

@brief   Locks the Fast Program Erase Mode.

@return  none

*/

void FLASH_Lock_Fast( void )

{

FLASH->CR |= CR_LOCK_Set;

}

/*********************************************************************

@fn      FLASH_Unlock_Fast

@brief   Unlocks the Fast Program Erase Mode.

@return  none

*/

void FLASH_BufReset( void )

{

FLASH->CR |= CR_PAGE_PG;

FLASH->CR |= CR_BUF_RST;

while( FLASH->SR & SR_BSY );

FLASH->CR &= ~CR_PAGE_PG;

}

/*********************************************************************


@fn      FLASH_BufLoad



@brief   Flash Buffer load(128 bit).



@param   Address - specifies the address to be programmed.


     Data0 - specifies the data0 to be programmed.



     Data1 - specifies the data1 to be programmed.



     Data2 - specifies the data2 to be programmed.



     Data3 - specifies the data3 to be programmed.




@return  none

*/

void FLASH_BufLoad( uint32_t Address, uint32_t Data0, uint32_t Data1, uint32_t Data2, uint32_t Data3 )

{

if( ( Address >= ValidAddrStart ) && ( Address < ValidAddrEnd ) )

{

FLASH->CR |= CR_PAGE_PG;

*( __IO uint32_t * )( Address + 0x00 ) = Data0;

*( __IO uint32_t * )( Address + 0x04 ) = Data1;

*( __IO uint32_t * )( Address + 0x08 ) = Data2;

*( __IO uint32_t * )( Address + 0x0C ) = Data3;

FLASH->CR |= CR_BUF_LOAD;

while( FLASH->SR & SR_BSY );

FLASH->CR &= ~CR_PAGE_PG;
 *( __IO uint32_t * )0x40022034 = *( __IO uint32_t * )( Address ^ 0x00000100 );

}

}


/*********************************************************************


@fn      FLASH_ErasePage_Fast



@brief   Erases a specified FLASH page (1page = 256Byte).



@param   Page_Address - The page address to be erased.



@return  none

*/

void FLASH_ErasePage_Fast( uint32_t Page_Address )

{

if( ( Page_Address >= ValidAddrStart ) && ( Page_Address < ValidAddrEnd ) )

{

FLASH->CR |= CR_PAGE_ER;

FLASH->AR = Page_Address;

FLASH->CR |= CR_STRT_Set;

while( FLASH->SR & SR_BSY );

FLASH->CR &= ~CR_PAGE_ER;
 *( __IO uint32_t * )0x40022034 = *( __IO uint32_t * )( Page_Address ^ 0x00000100 );

}

}


/*********************************************************************


@fn      FLASH_ProgramPage_Fast



@brief   Program a specified FLASH page (1page = 256Byte).



@param   Page_Address - The page address to be programed.



@return  none

*/

void FLASH_ProgramPage_Fast( uint32_t Page_Address )

{

if( ( Page_Address >= ValidAddrStart ) && ( Page_Address < ValidAddrEnd ) )

{

FLASH->CR |= CR_PAGE_PG;

FLASH->AR = Page_Address;

FLASH->CR |= CR_STRT_Set;

while( FLASH->SR & SR_BSY );

FLASH->CR &= ~CR_PAGE_PG;
 *( __IO uint32_t * )0x40022034 = *( __IO uint32_t * )( Page_Address ^ 0x00000100 );

}

}

chflash.h文件

    
#ifndef __CHFLASH_H__
#define __CHFLASH_H__
#include "sys.h"  
define FLASH_SAVE_ADDR  0x0800FC00 	//ÉèÖÃFLASH ±£´æµØÖ·(±ØÐëΪżÊý£¬ÇÒÆäÖµÒª´óÓÚ±¾´úÂëËùÕ¼ÓÃFLASHµÄ´óС+0X08000000)
void Flash_Test_Fast( void );
endif