在整机系统的复杂条件下,针对使用JATG仿真器对FPGA进行固件升级方式在工程应用上实现困难的问题,提出了一种基于Xilinx FPGA的串口在线升级方法,利用MultiBoot功能将FLASH分为Golden Image区和Update Image区,Golden Image区存储引导固件,Update Image区存储工程应用固件。实验结果表明,对Update Image进行升级时,串口速率的识别误差小于等于1.408%,具有较强的波特率自适应能力,能够适用于非常规波特率的应用场景。

Aiming at the problem that it is difficult to realize the firmware upgrade method of FPGA by using JATG emulator in engineering application,a serial port online upgrade method based on Xilinx FPGA is proposed under the complex condition of the whole machine system.The FLASH is divided into Golden Image area and Update Image area by using MultiBoot function.The Golden Image area is used to store boot firmware and the Update Image area is used to store engineering application firmware.The experiment results show that the serial port rate identification error is less than or equal to 1.408% when the Update Image is upgraded,which has better baud rate adaptive capability,and can be applied to scenarios with unconventional baud rates.