NXP

现场升级方案:LPC1788采用U盘方式进行程序IAP升级功能的实现

2019-07-12 13:28发布

现场升级方案:LPC1788采用U盘方式进行程序IAP升级功能的实现 闲来无事,总结一下前段时间做过的U盘升级项目。一个新手的成长之路在于善于总结,生活也是一样扯远了,我准备了两个软件环境,一个带操作系统(UCOS)的,另一个裸机版的。随后我会附上两个程序代码。U盘升级可以分为两部分代码:U盘读取bin文件和IAP功能两部分。大概说一下实现过程,具体IAP网上都玩坏了。 硬件环境:NXP 1788 软件环境:KEIL 实现过程:上面说了我准备了两个程序,就用裸机版的代码说一下实现流程。带操作系统的原理都是一样的。只是多创建几个任务而已。USB_HOST实现IAP升级,总的思路就是:复制bin文件到U盘->目标板断电,插上U盘->目标板上电,进入升级->运行升级程序。其实可以更具体,比如说设置升级标志或者按键。 拿到一个程序先从main开始,直接贴代码,说一大堆废话有什么用。   int main()
{
  int32_t  rc;
 uint32_t  numBlks,blkSize;
 uint8_t inquiryResult[INQUIRY_LENGTH];
   SystemInit();                  UART_Init(57600);         
   Host_Init();              
    rc =Host_EnumDev();      
    if (rc ==OK) {
  
       rc = MS_Init( &blkSize, &numBlks, inquiryResult );
       if (rc == OK) {
           rc = FAT_Init();  
           if (rc == OK) {
               Bin_Read();   
           } else {
               return (0);
           }
       } else {
           return (0);
       }
    } else{       
       return (0);
    }
   while(1);
}
下面分模块说一下, 前面的硬件初始化函数很简单,USB设备枚举和FAT文件系统NXP官网上都有,只需改硬件接口,Host_Init函数如下: void  Host_Init(void)
{
 uint32_t HostBaseAddr;
   LPC_SC->PCONP   |=0x80000000;
   LPC_USB->OTGClkCtrl   =0x00000019; 
    while((LPC_USB->OTGClkSt & 0x00000019) != 0x19);
 
 LPC_USB->StCtrl =0x1; 
  LPC_IOCON->P0_29 &= ~(0x07UL << 0);
   LPC_IOCON->P0_30 &= ~(0x07UL << 0);
   LPC_IOCON->P1_28 &= ~(0x07UL << 0);
   LPC_IOCON->P1_29 &= ~(0x07UL << 0);
   LPC_IOCON->P0_29 |= 0x01UL <<0;                                   
   LPC_IOCON->P0_30 |= 0x01UL <<0;                                   
   LPC_IOCON->P1_28 |= 0x01UL <<0;                                   
   LPC_IOCON->P1_29 |= 0x01UL <<0;                                   //  P1.29 --USB_SDA1     
   PRINT_Log("Initializing HostStack ");
 
 HostBaseAddr = HOST_BASE_ADDR;
   Hcca      = (volatile HCCA      *)(HostBaseAddr+0x000);
   TDHead    = (volatile HCTD      *)(HostBaseAddr+0x100);
   TDTail    = (volatile HCTD      *)(HostBaseAddr+0x110);
   EDCtrl    = (volatile HCED      *)(HostBaseAddr+0x120);
   EDBulkIn   =(volatile HCED      *)(HostBaseAddr+0x130);
   EDBulkOut  = (volatile HCED      *)(HostBaseAddr+0x140);
   TDBuffer   =(volatile  uint8_t *)(HostBaseAddr+0x150);
   FATBuffer  = (volatile  uint8_t*)(HostBaseAddr+0x1D0);
    UserBuffer =(volatile  uint8_t*)(HostBaseAddr+0x1000);
   
   Host_EDInit(EDCtrl);
   Host_EDInit(EDBulkIn);
   Host_EDInit(EDBulkOut);
   Host_TDInit(TDHead);
   Host_TDInit(TDTail);
   Host_HCCAInit(Hcca);
   Host_DelayMS(50);               
   LPC_USB->Control      = 0;   
   LPC_USB->ControlHeadED =0;   
   LPC_USB->BulkHeadED   = 0;   
   
   
   LPC_USB->CommandStatus = OR_CMD_STATUS_HCR;
   LPC_USB->FmInterval   = DEFAULT_FMINTERVAL; 
                                                   
   LPC_USB->Control  = (LPC_USB->Control &(~OR_CONTROL_HCFS)) | OR_CONTROL_HC_OPER;
   LPC_USB->RhStatus =OR_RH_STATUS_LPSC;       
   
   LPC_USB->HCCA = (uint32_t)Hcca;
   LPC_USB->InterruptStatus |=LPC_USB->InterruptStatus;                  
   LPC_USB->InterruptEnable  = OR_INTR_ENABLE_MIE|
                        OR_INTR_ENABLE_WDH |
                        OR_INTR_ENABLE_RHSC |
                        OR_INTR_ENABLE_UE;

   
 NVIC_EnableIRQ(USB_IRQn);              
 NVIC_SetPriority (USB_IRQn,0);   
   PRINT_Log("Host Initialized ");
}
 这段主要是USB引脚配置和USB主机初始化。Bin_Read()函数如下: void  Bin_Read(void)
{
     int32_t  fdr;
     uint32_t  bytes_read,writelen;
     uint32_t dstaddr;
     SelSector(APP_START_SECTOR,APP_END_SECTOR);        //选择扇区
     EraseSector(APP_START_SECTOR,APP_END_SECTOR);                         
     BlankCHK(APP_START_SECTOR,APP_END_SECTOR);                            
     SelSector(APP_START_SECTOR,APP_END_SECTOR);    
     PRINT_Log(" start file operations... ");
   fdr = FILE_Open(FILENAME_R, RDONLY);
    if (fdr >0) {
       PRINT_Log("Reading from %s... ", FILENAME_R);
  for(writelen=0;writelen<(APP_END_ADDR-APP_START_ADDR)/1024;writelen++)
   {
    bytes_read =FILE_Read(fdr, UserBuffer,MAX_BUFFER_SIZE);           
    dstaddr=  (uint32_t)(APP_START_ADDR +(writelen)*1024);//dst address.  
   SelSector(APP_START_SECTOR,APP_END_SECTOR);    
   RamToFlash(dstaddr,(uint32_t)UserBuffer, 1024);
   Compare(dstaddr, (uint32_t)UserBuffer, 1024);
   }  
  // printf("%x",writelen);
  PRINT_Log(" write filesuccessful ");
   SCB->VTOR  =APP_START_ADDR;                                             
   ExceuteApplication();                                                      
   FILE_Close(fdr);                                                            
    } else{
       PRINT_Log(" write file failed ");
    }
}
       上面的代码可以分为两部分:1.从U盘读取bin文件2.IAP功能。先说IAP部分,IAP实现方法有UART,GPRS,USB等方式。要进行IAP设计,先划分FLASH扇区。LPC1788的FLASH划分如下: 现场升级方案:采用U盘方式进行程序IAP升级功能的实现

将flash划分为两个区,bootloader和APP区,bootloader存放升级引导程序,即我们的USB_HOST_IAP代码,根据具体的Code大小确定bootloader的扇区,APP就是用户程序即需要升级的程序代码。APP需要配置后面再说。这是我的扇区划分: #define    IAP_START_ADDR 0x00000000                                 // IAP开始地址
#define    IAP_LOCATION    0x1FFF1FF1                                  

#defineAPP_START_ADDR      0x00A000             // 用户程序起始地址
#defineAPP_END_ADDR       0x78000               //LPC1788 512KFlash         
//#defineAPP_SIZE      0x10000 

#defineAPP_START_SECTOR     10
#defineAPP_END_SECTOR        29                  // LPC1788  512K Flash扇区
下面分别概括一下实现IAP命令的函数,IAP功能命令有准备编程扇区,复制RAM到FLASH,擦除扇区,扇区查空,读器件ID,读BOOT代码版本,比较等指令。程序要进行IAP升级,必须要先选择扇区擦除扇区之后才能写进Flash。先需要定义系统时钟,参数和一些变量。 #define    IAP_FCCLK      48000  uint32_t   paramin[8];                                             
uint32_t   paramout[8];                                              
unsigned long command[5];
unsigned long result[5];
typedef void (*IAP) (unsigned int [ ] , unsigned int []);      
写数据之前,必须要选择需要写入的扇区,选择扇区部分代码:  uint32_t   SelSector(uint8_t   sec1,uint8_t   sec2)
{
    paramin[0] =IAP_SELECTOR;                                         
    paramin[1] =sec1;                                                 
    paramin[2] =sec2;
   (*(void(*)())IAP_LOCATION)(paramin,paramout);                     
   return(paramout[0]);                                               
}
选中扇区之后,要检查该扇区是否已经有数据,所以要擦除扇区,附代码: uint32_t   EraseSector(uint32_t sec1, uint32_t sec2)
{
    paramin[0] =IAP_ERASESECTOR;                                      
    paramin[1] =sec1;                                                 
    paramin[2] =sec2;
    paramin[3] =IAP_FCCLK;
   (*(void(*)())IAP_LOCATION)(paramin,paramout);                     
   return(paramout[0]);                                               
}
下来就是向flash写入数据,flash起始地址必须以256字节为分界,调用函数 uint32_t   RamToFlash(uint32_t dst, uint32_t src, uint32_t no)
{
    paramin[0] =IAP_RAMTOFLASH;                                       
    paramin[1] =dst;                                                  
    paramin[2] =src;
    paramin[3] =no;
    paramin[4] =IAP_FCCLK;
   (*(void(*)())IAP_LOCATION)(paramin,paramout);                     
   return(paramout[0]);                                               
}
  写完之后要进行比较,将RAM读出来的数据和写入到flash的数据进行比较,注意flash起始地址必须字对齐,字节个数必须能被4整除,当源或目标地址包含从地址0开始的前64个字节中的任意一个地址时, 比较的结果可能不准确。因为前64个字节可被重新映射到RAM uint32_t   Compare(uint32_t   dst, uint32_t   src, uint32_t   no)
{
    paramin[0] =IAP_COMPARE;                                          
    paramin[1] =dst;                                                  
    paramin[2] =src;
    paramin[3] =no;
   (*(void(*)())IAP_LOCATION)(paramin,paramout);                     
   return(paramout[0]);                                               
}
  还有ExceuteApplication()部分的代码,程序写入flash之后,要重新映射向量表,从bootloader跳转到APP执行,这就要获取程序的入口地址和SP堆栈的值。如下: __asm void ExceuteApplication(void)
{
  ldr r0, =0x00A000
  ldr r0, [r0]
  mov sp, r0
  ldr r0, =0x00A004
  ldr r0, [r0]
       BX  r0
} 最后关闭文件系统,main里面最主要读取bin文件调用IAP功能的Bin_Read()函数说完了。最后说一下APP程序产生bin文件的配置。
KEIL中Target Options配置:
1.将程序入口定位到App即用户程序的入口地址;2.User选项:Run#1填写产生bin文件路径:C:KeilARMARMCCinfromelf.exe--bin --outputoutputFLASH est.binoutputFLASHLPC177x_8x.axf;3.C/c++选项:Optimization选择高优先级:Level3;4.Asm选项:Define填NO_CRP;不产生空文件夹5.Linker选项:勾选UseMemory layout from TargetDialog.整个工程就算建立起来了。附两个版本的代码,仅限参考:
裸机版:http://download.csdn.net/download/u012246376/8453395  带操作系统UCOS版本:http://download.csdn.net/download/u012246376/8453349   Blog:         http://blog.sina.com.cn/u/5147581417
                     http://bbs.ednchina.com/BLOG_976455580_2004323.HTM