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Update entry on building program in workbook

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This change updates the information on "Building an Embedded Program". There is a mismatch between the described target `thumbv7em-none-eabi` compared to the set target in file `beginner/apps/.cargo/config` that contains target entry `thumbv7em-none-eabihf`.
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Sebastian Ziebell 2020-09-07 22:05:31 +02:00
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8
embedded-workshop-book/src/building-program.md
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@ -5,7 +5,7 @@ The default in a Cargo project is to compile for the host (native compilation).
``` text ``` text
# .cargo/config # .cargo/config
[build] [build]
target = "thumbv7em-none-eabi" # = ARM Cortex-M4 target = "thumbv7em-none-eabihf" # = ARM Cortex-M4
``` ```
✅ Inside the folder `beginner/apps`, use the following command to cross compile the program to the ARM Cortex-M4 architecture. ✅ Inside the folder `beginner/apps`, use the following command to cross compile the program to the ARM Cortex-M4 architecture.
@ -14,12 +14,12 @@ target = "thumbv7em-none-eabi" # = ARM Cortex-M4
$ cargo build --bin hello $ cargo build --bin hello
``` ```
The output of the compilation process will be an ELF (Executable and Linkable Format) file. The file will be placed in the `target/thumbv7em-none-eabi` directory. The output of the compilation process will be an ELF (Executable and Linkable Format) file. The file will be placed in the `target/thumbv7em-none-eabihf` directory.
✅ Run `$ file target/thumbv7em-none-eabi/debug/hello` and compare if your output is as expected. ✅ Run `$ file target/thumbv7em-none-eabihf/debug/hello` and compare if your output is as expected.
Expected output: Expected output:
``` console ``` console
$ file target/thumbv7em-none-eabi/debug/hello $ file target/thumbv7em-none-eabihf/debug/hello
hello: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, with debug_info, not stripped hello: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, with debug_info, not stripped
``` ```