FX3从SPI启动并配置FPGA如何分离SPI闪存

嗨，Maheswari，
我现在的第一个信息是：
请参考以下两个URL：AN76405-EZ-USB®FX3μ/FX3S启动选项CyPress半导体和FX3程序员手册：HTTP://wwwyCysP.COM/FIL/12438 6/下载
AN76405称SPI引导只支持一个固件映像，不允许冗余图像。
根据程序员的参考手册：在复位时，ROM引导加载程序基于PMOD[2:0]标识引导模式。当引导加载程序识别SPI是引导模式时，它尝试从SPI Flash读取地址0。当找到有效的头时，ROM引导加载程序继续。
有效的头信息可作为AN76405应用笔记的一部分。
当你提到Bootloader时，你指的是一个定制的引导加载程序（它可能是从SPI闪存运行）还是ROM引导加载程序。
这篇文章将有更多的信息从我的末尾更新。
谢谢和问候，
苏德希尔



     以下为原文
  Hi Maheswari,
 
The first level of information that I have now is:
 
Please refer the following two URLs: AN76405 - EZ-USB® FX3™/FX3S™ Boot Options | Cypress Semiconductor  and FX3 Programmer's manual: http://www.cypress.com/file/124386/download 
 
AN76405 says that SPI Boot supports only one Firmware Image and no redundant image is allowed.
 
From the programmer's reference manual: On reset the ROM Bootloader identifies the boot mode based on PMODE[2:0]. When the boot loader identifies that the SPI is the boot mode, then it tries to read address 0 from SPI Flash. When a valid header is found the ROM BOOTLOADER continues.
 
The valid header information is available as part of AN76405 Application Note.
 
When you are referring to bootloader are you referring to a custom boot-loader (which might be running from SPI Flash) or ROM Boot-loader.
 
This post will be updated when have more information from my end.
 
Thank You & Regards,
Sudheer

谢谢你的回复。
我指的是自定义引导加载程序。在比特流的情况下会发生什么。FX3如何从SPI位置获取比特流并配置FPGA。我应该如何通知比特流存储位置到FX3。因此，每当FX3枚举时，它将在启动主应用程序之前配置FPGA。
例如。
我有UVC应用程序。我会把UVC固件和FPGA比特流存储在SPI闪存中。我想FX3配置FPGA之前，它开始流图像。



     以下为原文
  Thanks for the reply.
 
I am referring to the custom boot-loader. What will happen in case of bitstream. How does FX3 takes bitstream from SPI location and configure the FPGA. How should I notify bitstream stored location to FX3 . So that every time when FX3 enumerates , it will configure the FPGA before it starts the main application .
 
For example.
 
I have UVC application. I will store the UVC firmware and FPGA  Bitstream in SPI Flash memory. I want the FX3 to configure the FPGA before it starts streaming the image.

可以使用第二阶段引导加载程序。第二阶段引导加载程序将从SPI地址0x00开始。然后，您可以修复主固件映像地址和次要固件映像地址，其中第二阶段引导加载程序将寻找固件来引导。然后你可以将你的FPGA比特流存储到SPI闪存中的固定地址，FX3应用固件将读取它并将其加载到FPGA中。
例如：
0至32 KB：第二阶段引导装载程序
64 KB至320 KB：固件的第一次拷贝
320 KB至576 KB：固件的第二次拷贝
576 KB到1576 KB：FPGA比特流（假设比特流文件大小在1 MB左右）
1576 KB前进：您的自定义数据



     以下为原文
  You can use the second stage bootloader. The second stage bootloader will start from a SPI address 0x00. You can then fix the main firmware image address and the secondary firmware image address where the second stage bootloader will look for the firmware to boot from. And then you can store your FPGA bitstream  to fixed address in the SPI flash which the FX3 application firmware will read and load it into the FPGA..
 
For example:
 
0 to 32 KB: Second Stage bootloader
64 KB to 320 KB: first copy of firmware
320 KB to 576 KB: Second Copy of firmware
576 KB to 1576 KB: FPGA bitstream (Assuming the bitstream file size to be around 1 MB)
1576 KB onwards: Your custom data