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MaxXSoft / Fuxi

Fuxi (伏羲) is a 32-bit pipelined RISC-V processor written in Chisel3.
GNU General Public License v3.0
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Confused about bootloader and the flow of running programs on FPGA #2

Closed buctor41 closed 2 years ago

buctor41 commented 2 years ago

I'm a little confused about the bootloader(soc/soc.srcs/sources_1/new/ocm.coe),Because it is the form of machine code,i do not know which hardware is booted.And I want to run the CoreMark or other programs on the fpga,what should i do?

MaxXSoft commented 2 years ago

Which hardware is booted?

The source code of the bootloader can be found here, which you can see the bootloader initializes the UART, detects the status of switch on the FPGA board, and then loads program from the flash or UART.

How to run programs on the FPGA?

You can compile your bare-metal program into an ELF file, write it to the flash memory, then turn the switch on the FPGA board to flash boot mode (see the bootloader implementation), and finally reset the FPGA.

You can also turn the switch to UART boot mode, connect the serial port of FPGA to your PC, and then use this script to send the ELF file to the board.

Some of ready-to-run programs (including CoreMark) can be found here.