27 lines
1.2 KiB
Markdown
Executable file
27 lines
1.2 KiB
Markdown
Executable file
# Algorithms-c
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This subproject contains all C Code for the benchmarking. It is built with
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[ceedling](https://www.throwtheswitch.org/ceedling), a more modern build tool
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for C projects that also integrates well with the Unity framework.
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## Compiler
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To compile for STM32, you need to crosscompile
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```
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# apt install binutils-arm-none-eabi gcc-arm-none-eabi
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```
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Then, use your tool with an `arm-none-eabi-` prefix: `arm-none-eabi-gcc`. This
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project has been configured to use the compiler specified in `$CC` to compile modules and `$AR` to
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"link" the object files (this should be `ar` for a static library like this)
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. You can and should also give extra compiler flags in `$CC_FLAGS`.
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```bash
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# cross-compile for STM32
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CC=arm-none-eabi-gcc AR=arm-none-eabi-ar CC_FLAGS="-march=armv6-m" ceedling release
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# compile for this computer
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CC=gcc AR=ar ceedling release
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```
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It is critically important to define the `-march=ARCH` option when using `arm-none-eabi-gcc`, since the compiler will otherwise just assume a target architecture. In this case, it needs to be set to `armv6-m`, since the MPU is a `cortex-M0+`. This MPU does only support the thumb instruction-set, not the ARM32 set.
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