Polytech ARM-based embedded processor

📋 Instructions we had to follow

By using Logisim, we firstly had to make a CPU (a simplified one). To test it, we have some very basic C snippets which can be compiled by the CPU into Assembly. Next, we had to make a program which can translate assembly language (ARMv7) into machine code.

You can learn more about Logisim, ARMv7 and the whole Cortex-M0 family of processors in the docs folder.

⚙️ Compile C to ARM Assembly

To check whether our CPU works or not, we need to compile these C programs and compare each other.

Install the libc6-armel-cross, libc6-dev-armel-cross, binutils-arm-linux-gnueabi and libncurses5-dev packages by using the following command:

sudo apt-get install libc6-armel-cross libc6-dev-armel-cross binutils-arm-linux-gnueabi libncurses5-dev

Then, install gcc and g++ to support ARM:

sudo apt-get install gcc-arm-linux-gnueabi g++-arm-linux-gnueabi

Finally, you can compile like this:

arm-linux-gnueabi-gcc hello.c -S -mtune=cortex-m0 -march=armv7-m -mthumb -fomit-frame-pointer -o hello.s

📽️ Presentation

See the presentation folder for more details.

🧾 Additional informations

C Headers

Program	Description
crypto	Cryptography
fixed	Fixed Point Decimal Numbers
math	Mathematical tools
parm	Main Header
stdio	Text Input/Output (keyboard, terminal)
string	Basic implementation of strings
string2	Other basic implementation of strings
trigo	Trigonometric functions (Taylor series)
utils	Debugging Tools
video	Matrix screen

C programs

Program	Description
calckeyb	Calculator with keyboard and terminal
calculator	Calculator with DIP-switches
simple_add	Adds two variables and displays it in RES
testfp	Demonstrate fixed-point number macros
tty	Display "Project PARM" in terminal

MMIO

See parm.h for the pins documentation.

✒️ Authors

• Marc PINET - marcpinet
• Loïc PANTANO - loicpantano
• Arthur RODRIGUEZ - rodriguezarthur