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Reload to refresh your session. {{ message }} ksaj / helloworld Public * Notifications * Fork 0 * Star 3 Hello World using 6 different methods in Assembly Language for Raspberry Pi License MIT license 3 stars 0 forks Activity Star Notifications * Code * Issues 0 * Pull requests 0 * Actions * Projects 0 * Security * Insights More * Code * Issues * Pull requests * Actions * Projects * Security * Insights ksaj/helloworld This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. master Switch branches/tags [ ] Branches Tags Could not load branches Nothing to show {{ refName }} default View all branches Could not load tags Nothing to show {{ refName }} default View all tags Name already in use A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch? Cancel Create 1 branch 0 tags Code * Local * Codespaces * Clone HTTPS GitHub CLI [https://github.com/k] Use Git or checkout with SVN using the web URL. [gh repo clone ksaj/h] Work fast with our official CLI. Learn more about the CLI. * Open with GitHub Desktop * Download ZIP Sign In Required Please sign in to use Codespaces. Launching GitHub Desktop If nothing happens, download GitHub Desktop and try again. Launching GitHub Desktop If nothing happens, download GitHub Desktop and try again. Launching Xcode If nothing happens, download Xcode and try again. Launching Visual Studio Code Your codespace will open once ready. There was a problem preparing your codespace, please try again. Latest commit @ksaj ksaj Added hw-rpi4-6 ... 3d0bd40 Sep 13, 2019 Added hw-rpi4-6 3d0bd40 Git stats * 25 commits Files Permalink Failed to load latest commit information. Type Name Latest commit message Commit time CODE_OF_CONDUCT.md Create CODE_OF_CONDUCT.md March 27, 2018 17:28 LICENSE Initial commit March 27, 2018 15:18 Makefile Added hw-rpi4-6 September 12, 2019 23:16 README.md Added 6 (printf) and fixed a typo in the README September 12, 2019 23:12 hw-rpi3-1.S Add files via upload March 27, 2018 15:22 hw-rpi3-2.S Add files via upload March 27, 2018 15:22 hw-rpi3-3.S Add files via upload March 27, 2018 15:22 hw-rpi3-4.S Add files via upload March 27, 2018 15:22 hw-rpi3-5.S Add files via upload March 27, 2018 15:22 hw-rpi4-6.S Update hw-rpi4-6.S September 12, 2019 22:59 View code [ ] helloworld hw-rpi3-1 hw-rpi3-2 hw-rpi3-3 hw-rpi3-4 hw-rpi3-5 hw-rpi4-6 Resources README.md helloworld Hello World, using 6 different methods in Assembler on Raspberry Pi, in varying levels of complexity. Chooose your Linux, and these should work without alteration. A makefile has been included to simplify compilation. Tested only on Raspberry Pi 3 and 4 (Raspbian) as specified in the source file name, but they should all work on the other models just fine since there isn't anything particularly advanced going on. These are all straight up "normal" ways, although each one shows a completely different medhod for getting there. The code is clean and quite straight forward. There are probably better ways to do some of the things I came up with, but this is about doing only one thing - printing "Hello, World!" on its own line. Take it as a challenge, and show me your ideas if you can think of other methods not included here. hw-rpi3-1 Hello World using puts(). Notice it doesn't need a carriage return, while the other methods do. The puts() call is rather slobber-proof. hw-rpi3-2 Hello World using write(). I suspect this is the more typical method. hw-rpi3-3 Hello World using fwrite(). fwrite() is typically used to work with binary data instead of text mode. Of course, ascii is made up of binary, so it works perfectly well for spitting out letters, spaces and punctuation, too. hw-rpi3-4 Hello World using putchar(). This is closer to how the computer actually does it deep down inside. I had to use a goto to initiate the loop because ARM doesn't do jz in the same way as Intel. It is strangely easier to reverse the flow and jump if not zero. hw-rpi3-5 Hello World bypassing clib altogether, and talking direcly to the hardware. Apparently this is a no-no, even if it is theoretically more efficient. The bare-metal and OS dev folk are pretty much limited to using this method until their kernel boots and provides other methods, like those covered already. hw-rpi4-6 Hello World using printf(). I wrote this on my new rpi4, but it should work on the others, too. This method makes sense when you want to use format strings. Otherwise it is probably overkill. Here we've just used \n for the newline, but with printf you have a whole lot of interesting % variables at your disposal. Resources Since uploading the first bunch of these, I have discovered a few good resources on ARM assembler for the RPI. Here is one that seems to follow a good process for learning, and goes more in depth than any of the others I found: https://thinkingeek.com/ arm-assembler-raspberry-pi/ About Hello World using 6 different methods in Assembly Language for Raspberry Pi Topics raspberry-pi raspberrypi assembler hello-world assembly-language helloworld helloworld-programs raspberry-pi-3 Resources Readme License MIT license Code of conduct Code of conduct Activity Stars 3 stars Watchers 1 watching Forks 0 forks Report repository Releases No releases published Packages 0 No packages published Languages * Assembly 78.3% * Makefile 21.7% Footer (c) 2023 GitHub, Inc. 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