FPGA online upgrading method based on NIOS II
A processor and area technology, applied in instruments, electrical digital data processing, computing, etc., can solve the problems of large configuration data, increased complexity, time-consuming and laborious, etc.
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[0020] The embodiment provides a kind of FPGA online upgrade method based on NIOS II, and the IP core of the NIOS II processor is embedded in the embodiment FPGA as a controller, and integrates peripherals such as serial port and network port; FPGA adopts the form of secondary loader to start and upgrade ,Such as image 3 As shown, the FPGA divides the configuration FLASH chip into four storage areas, and the four storage areas are area 1, 2, 3, and 4 respectively. Area 1 stores the configuration file of the FPGA secondary loader program (factory mode program), area 2 stores FPGA configuration file 1, area 3 stores FPGA configuration file 2, and area 4 stores user data. The steps of FPGA online upgrade are as follows: Figure 4 Shown: When the system is powered on or reset, the NIOS II processor starts the timer and closes the watchdog program; Area 2 reads FPGA configuration file 1 and enters user mode 1; if data is received, and the received data is instruction data for sw...
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