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smallcpus [2012/12/09 18:46] kris |
smallcpus [2015/10/21 19:05] (current) kris |
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| ===== Enabling Assembler Programming on Arduino/Uno32 ===== | ===== Enabling Assembler Programming on Arduino/Uno32 ===== | ||
| + | |||
| + | **More recent versions of the Arduino IDE recognize .S files, and no changes are needed. I've tested this with version 1.6.5. If you're using a recent IDE, you can skip ahead to 'The Blink Example In Assembler'** | ||
| + | |||
| + | **Make sure to also check 'Feedback from Readers' at the end: it contains some important info for newer versions of the IDE.** | ||
| It is hard to get an in-depth understanding of Arduino and the various CPUs involved. The standard IDE involves a lot of 'magic' and there is not much help when you want to get a better understanding of how the magic works. | It is hard to get an in-depth understanding of Arduino and the various CPUs involved. The standard IDE involves a lot of 'magic' and there is not much help when you want to get a better understanding of how the magic works. | ||
| Line 392: | Line 396: | ||
| <code> | <code> | ||
| - | /* | ||
| - | Blink | ||
| - | Turns on an LED on for one second, then off for one second, repeatedly. | ||
| - | |||
| - | This example code is in the public domain. | ||
| - | */ | ||
| - | |||
| - | // Pin 13 has an LED connected on most Arduino boards. | ||
| - | // give it a name: | ||
| #define ledFrom 2 | #define ledFrom 2 | ||
| #define ledTo 9 | #define ledTo 9 | ||
| Line 442: | Line 437: | ||
| </code> | </code> | ||
| - | Then I set out to do as assembler-only version. In this version, the .ino file remains empty, and all you do is add a file 'knightrider.S' to the sketch on a second tab. You need to use the patched IDE for this - standard IDEs won't recognize the .S file. | + | Then I wrote assembler-only version. In this version, the .ino file remains empty, and all you do is add a file 'knightrider.S' to the sketch on a second tab. You need to use the patched IDE for this - standard IDEs won't recognize the .S file. As you'll see further, this first attempt is far from optimal. |
| <code> | <code> | ||
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| Run it again. Is that cool, or what? | Run it again. Is that cool, or what? | ||
| + | |||
| + | ===== Feedback from readers ===== | ||
| + | |||
| + | Hi Kris! | ||
| + | |||
| + | Thank you very much for your Arduino asm introduction. I helped me a lot getting started. | ||
| + | |||
| + | But then I tried to modify version 1.5.2 the same way, because according to the developer of the arduino eclipse plugin, this is the latest version compatible with the plugin. And I found out that you need to modify the file .../hardware/arduino/avr/platform.txt, too. So I thought, maybe you want to mention this in your introduction. | ||
| + | |||
| + | in the "AVR compile patterns" section, adding the following solved the issue: | ||
| + | |||
| + | ## Compile S files | ||
| + | recipe.S.o.pattern="{compiler.path}{compiler.c.cmd}" {compiler.S.flags} -mmcu={build.mcu} -DF_CPU={build.f_cpu} -D{software}={runtime.ide.version} {build.extra_flags} {includes} "{source_file}" -o "{object_file}" | ||
| + | |||
| + | Regards, | ||
| + | |||
| + | Ralf | ||
| ===== Stuff collected on the Internet ===== | ===== Stuff collected on the Internet ===== | ||
smallcpus.1355031974.txt.gz ยท Last modified: 2012/12/09 18:46 by kris
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