How to display one string to the console(terminal) by asm program?

[riscv-non-isa]

How to display one string to the console(terminal) by asm program?

[jim-wilson]

It is just an assembly example. It doesn't necessarily work on hardware or simulators. Even if it does, whether it works depends on what uart you have, and your hardware/simulator doesn't necessarily have the same uart as the author.

If you want code that works on hardware/simulator, you shouldn't be looking in an assembly language manual. You should be looking at hardware/simulator projects. Such as freedom-e-sdk or freedom-u-sdk for instance.

[clx782782]

I just want to run my built assembly program on rocket-chip implemented on Zedboard by ./fesvr program.

If the assembly program doesn't have output on the terminal/console,it's not convenient to verify on the rocket-chip hardware.I haven't other good verification ideas.Could you give me some advice?

[jim-wilson]

I'm a compiler guy. That's why I answer questions here, because compiler guys care about assembler syntax. But zedboard sounds suspiciously like a piece of hardware. I can't help you with that. You would have to ask someone who knows about working with hardware. This project is just for discussing assembly syntax.

I believe that fesvr is used by spike. I don't think that fesvr is useful if you have actual hardware. In that case, you presumably should be reading the programming manual for the UART that you have, and you might need to write a driver to be able to send characters over it.

You could try looking at sifive/freedom-e-sdk. This has code samples that can be run on the sifive hifive1 and some other sifive parts. You might find what you are looking for there. It has some code for sending characters via the UART on the hifive1 board.

[clx782782]

OK，I'll check it.

Sorry to trouble you and thanks again!