1、找到Keil的官方Flash下载算法路径进行修改

下载算法的模版在keil安装目录\ARM\Flash下的_Template文件夹，把此文件夹复制出来，进行修改。也可以自行修改此工程名。

C:\keil5\ARM\Flash\_Template\NewDevice.uvprojx

2、选择自己的板子的芯片

3、添加SPI和W25QXX驱动

添加W25QXX的驱动代码， 去正点原子的论坛下载STM32F29的寄存器工程，拷贝出HARDWARE文件夹下的SPI和W25QXX驱动，和SYSTEM文件夹。

4、添加相关驱动文件

5、修改FlashDev.c代码

修改FlashDev.c 中外部flash的大小

#include "../FlashOS.H"        // FlashOS Structures

struct FlashDevice const FlashDevice  =  {
   FLASH_DRV_VERS,             // Driver Version, do not modify!
	"STM32F429_W25QXX",   // Device Name 
	EXTSPI,
	0x90000000,// Device Start Address
	0x01000000,// Device Size in Bytes (16M)
	4096,// Programming Page Size
	0,                          // Reserved, must be 0
   0xFF,                       // Initial Content of Erased Memory
	2000,// Program Page Timeout 2000 mSec
	3000,                       // Erase Sector Timeout 3000 mSec
	0x001000,0x000000,// Sector Size  4kB (4 Sectors)
 SECTOR_END
};

6、修改FlashPrg.c代码

按照模版添加驱动代码

#include "../FlashOS.H"        // FlashOS Structures

#include "sys.h"
#include "delay.h"
#include "w25qxx.h"
#include "spi1.h"
#include "usart.h"

#define PAGE_SIZE            4096

uint8_t aux_buf[PAGE_SIZE];
uint32_t base_adr;
 
int Init (unsigned long adr, unsigned long clk, unsigned long fnc) {

  /* Add your Code */
     Stm32_Clock_Init(360,25,2,8);//设置时钟,180Mhz
     delay_init(180);            //初始化延时函数 
     //uart_init(90,115200);     //初始化串口波特率为115200
     W25QXX_Init();              //W25QXX初始化
     return (0);                                  // Finished without Errors
}

int UnInit (unsigned long fnc) {

  /* Add your Code */
  return (0);                                  // Finished without Errors
}

int EraseChip (void) {

  /* Add your Code */
	W25QXX_Erase_Chip();
	return (0);                                  // Finished without Errors
}

int EraseSector (unsigned long adr) {

  /* Add your Code */
	W25QXX_Erase_Sector((adr-base_adr)/4096);
	return (0);                                  // Finished without Errors
}

int ProgramPage (unsigned long adr, unsigned long sz, unsigned char *buf) {

  /* Add your Code */
	W25QXX_Write_NoCheck(buf,adr-base_adr,sz);
	return (0);                                  // Finished without Errors
}

int BlankCheck (unsigned long adr, unsigned long sz, unsigned char pat) {

    return (1);                                        /* Always Force Erase */
}
unsigned long Verify      (unsigned long adr,   // Verify Function
                           unsigned long sz,
                           unsigned char *buf)
{
        return 0;//直接返回0，表示成功                             
}

8、编译后将xxx.FLM拷贝到C:\keil5\\Keil_v5\ARM\Flash目录

工程编译完成后在C:\keil5\ARM\Flash_Template的目录下把STM32F429_W25QXX.FLM拷贝到C:\keil5\ARM\Flash的目录中 即可在Keil中添加调用了

代码下载

Github地址：https://gitee.com/Aladdin-Wang/hellotouchGFX.git