如何在不移植OS的情况下并行运行两个进程

你问你是否可以同时运行它们？一个RTOS通常是你实现这一目标的最佳选择，但是中断将是噩梦。如果从引导加载程序和应用程序中断，则很难处理两个独立的中断向量表。



      以下为原文

    Are you asking if you can run them simultaneously? An RTOS is generally your best bet to accomplish this, but interrupts are going to be the nightmare. If you have interrupts from the bootloader and the application, you're going to have a hard time handling two separate interrupt vector tables.

通常，应用程序在特定的时间启动引导加载程序，或者引导加载程序在应用程序之前运行，以查看它是否需要对应用程序进行重新编程。因此，固件的两侧是紧密耦合的。这不是你想要的建筑吗？



      以下为原文

    Typically, the application launches the bootloader at a specific time or the bootloader runs before the application to see if it needs to reprogram the application.  Thus both sides of the firmware are tightly coupled.  Is this not the case with you intended architecture?

感谢您的回复。我的要求是，我想通过以太网加载新的HEX文件。为了实现这一点，我需要在控制器上运行Bootloader和应用程序。现在我在循环中同时运行以太网栈和应用程序。随着我的应用程序花费更多的时间，以太网通信经常失败。以上解决方案，谢谢。



      以下为原文

    Thanks for the reply.
My requirement is i want to load the new hex files through ethernet. to accomplish this i need both bootloader and application running on the controller. And right now i am running both Ethernet stack and application in sequence in the loop. As my application takes more time Ethernet communication is getting failed often. Any solution for the above .
 
Thanks in advance.
 

您的应用程序应该在引导加载程序中启动。引导加载程序可以完成包含主应用程序的程序Flash的一部分的CRC或散列。如果计算的CRC与存储在程序Flash中的值匹配，那么引导加载程序应该简单地启动主应用程序。如果Bootloader发现这些值不匹配，那么它应该使用先前存储的图像（最好是Flash中的片外）来对应用程序进行反射。主应用程序可以使用TFTP或类似的东西下载和保存新的应用程序图像。它还可以根据接收到的命令设置一个定时器来安装新的图像。当它准备对应用程序进行重新设置时，将预存储的CRC值设置为应用程序的CRC到所有F，然后进行软件重启以启动引导加载程序再次运行。引导加载程序将发现应用程序的CRC或散列不是所有的F，因此它将安装新的应用程序。



      以下为原文

    Your application should boot in the bootloader.  The bootloader can do a CRC or hash of the part of program flash that contains the main application.  If the calculated CRC matches the value stored in program flash then the bootloader should simply launch the main application.  If the bootloader finds that the values don't match then it should reflash the application using the image previously stored, preferably off-chip in flash.
 
The main application can be tasked with downloading and saving a new application image using TFTP or something similar.  It can also set a timer to install the new image based on some command received.  When it is ready to reflash the application, set the pre-stored CRC value for the application's CRC to all F's and then do a software reboot to start the bootloader running again.  The bootloader will find that the application's CRC or hash isn't all F's so it will then install the new application.