This is the hw03 sample. Please follow the steps below.

1. Fork this repo to your own github account.

2. Clone the repo that you just forked.

3. Under the hw03 dir, use:

   • make to build.

   • make clean to clean the ouput files.

4. Extract gnu-mcu-eclipse-qemu.zip into hw03 dir. Under the path of hw03, start emulation with make qemu.

   See Lecture 02 ─ Emulation with QEMU for more details.

5. The sample is a minimal program for ARM Cortex-M4 devices, which enters while(1); after reset. Use gdb to get more details.

   See ESEmbedded_HW02_Example for knowing how to do the observation and how to use markdown for taking notes.

1. Edit main.c.

2. Make and run like the steps above.

3. Please avoid using hardware dependent C Standard library functions like printf, malloc, etc.

1. How do C functions pass and return parameters? Please describe the related standard used by the Application Binary Interface (ABI) for the ARM architecture.

2. Modify main.c to observe what you found.

3. You have to state how you designed the observation (code), and how you performed it.

   Just like how you did in HW02.

4. If there are any official data that define the rules, you can also use them as references.

5. Push your repo to your github. (Use .gitignore to exclude the output files like object files or executable files and the qemu bin folder)

• [] If you volunteer to give the presentation next week, check this.

★★★ Please take your note here ★★★

1. 實驗目的 觀察Ｃ語言在組語中如何運作
2. 實驗步驟 設計簡易Ｃ語言 將main.c編譯並用qemu進行模擬 觀察到組語先將3存入r3暫存器中 接著運用r7暫存器存入r3的值,再丟入r0中 同樣做法丟值進r1和r2 將r3的值加上暫存在r7的3 最後將r3值存入r0
3. 結果與討論 C語言在組語中運作方式基本上跟著已經寫好的ARM架構跑。