स्वदेशी Microprocessor Challenge 2020

Understanding Shakti Processors

Shakti is an Open Source processor development program based on RISC-V ISA. There are many classes of processors in the Shakti ecosystem with varying compute capabilities.

For this challenge, IIT Madras has made available two variants of Shakti, namely E-Class and C-Class. The participants have to choose one, based on their requirements and targeted applications.

Participants can learn more about RISC-V architecture from riscv.org. Knowing RISC-V architecture is not mandatory for building applications using Shakti processors.

E-Class

An Embedded class processor, built around a 3-stage in-order core. It is aimed at low-power and low compute applications.

It is capable of running basic RTOS like FreeRTOS, Zephyr and eChronos.

Market segments include: Smart-cards, IoT devices, motor controls and robotic platforms.

Learn More >>

C-Class

A controller class of processor, aimed at mid-range application workloads.

The core is highly optimized, 6-stage in-order design with MMU support and capability to run operating systems Linux and Sel4.

C-class targets compute/control applications in the 0.5-1.5 Ghz range.

Learn More >>

Shakti ecosystem

Shakti SoCs have a wide range of system softwares and tool chain support.

There is a Software Development Kit (SDK) and Integrated Development Environment (IDE) dedicated for Shakti SoCs.

A lot of sample applications integrating different sensors and chips are demonstrated.

The whole ecosystem is vibrant and Open source.

Shakti-SDK

Shakti SDK provides all necessary tools, scripts and board support packages to build applications. There are example programs demonstrating working of sensors. User manuals and guides can be downloaded from the Downloads menu.

Operating systems

Linux, Sel4, Free RTOS, and Zephyr are some of the standard operating systems proven to work on Shakti.

IDE

For Rapid application development, IDE's are indispensable. PlatformIO IDE support is available for Shakti.

WHERE DO I START?

The following steps will walk you through the procedure for building and executing an application over Shakti SoC's. There are three SoC's supported on either Artix7 35t or Artix7 100t FPGA boards. FPGA board will be provided by MeitY

Step 1: System Requirements for Shakti Ecosystem

The recommended system requirements are as follows,

Step 2: Installing Shakti SDK

Shakti SDK provides all necessary tools, scripts and board support packages to build applications. SDK has drivers and examples for using different peripherals in SoCs.

Understanding the SDK Architecture is important.
There is also a video guide to install Shakti-SDK Watch Video

Step 3: Installing the Shakti Tool-chain

SHAKTI uses RISC-V toolchains to build applications on top of it. The tool chain is prebuilt and can be installed as demonstrated in the video guide.

Video guide to install Shakti-tools Watch Video

Step 4: Configuring the FPGA

Use Vivado Web Pack to configure Shakti processor in FPGA.

Install Vivado Webpack if it is not installed already Watch Video
Connect USB cable to laptop / pc and to FPGA board as shown in the image.
Configure Shakti processor in FPGA using Vivado Watch Video

Step 5: Develop, build and execute an Application

The steps to add an application to SHAKTI-SDK is given below.
Please check SHAKTI-SDK for more applications.

The video guide to add a simple application to Shakti-SDK Watch Video

Step 6: Selecting the SoC for the स्वदेशी Microprocessor Challenge

Please select a SoC for developing your application. The features and details of each SoC is listed below. The selection of a Soc comes with a particular FPGA board.

Pinaka

A 32-bit E-class SoC on Artix7 35T board

Features:
1. E-class 3 stage In-order core
2. RV32IMAC supported
3. 128 KB of BRAM and 4 KB of ROM
4. 32 GPIOs
5. 6 PWM controllers
6. 2 SPI controllers
7. 3 UART controllers
8. 2 I2C controllers
9. 1 Timer (CLINT)
10. One Interrupt controller (PLIC)
11. Pin Mux supported
12. Arduino Compatible pin assignments
13. On board XADC
14. Onboard FTDI based debugger
15. Physical Memory Protection enabled
16. Soft Float library support

Parashu

A 32-bit E-class SoC on Artix7 100T board

Features:
1. E-class 3 stage In-order core
2. RV32IMAC supported
3. 256 MB of DDR and 4 KB of ROM
4. Arduino Compatible pin assignments
5. Pin Mux supported
6. 32 GPIOs
7. 6 PWM controllers
8. 2 SPI controllers
9. 3 UART controllers
10. 2 I2C controllers
11. 1 Timer (CLINT)
12. One Interrupt controller (PLIC)
13. On board XADC
14. Onboard FTDI based debugger
15. Physical Memory Protection enabled
16. Soft Float library support
17. Ethernet Lite

Vajra

A 64-bit C-class SoC on Artix7 100T board

Features:
1. C-class 6 stage In-order core
2. RV64IMACSU supported
3. 256 MB of DDR and 4 KB of ROM
4. Arduino Compatible pin assignments
5. Pin Mux supported
6. 32 GPIOs
7. 6 PWM controllers
8. 2 SPI controllers
9. 3 UART controllers
10. 2 I2C controllers
11. 1 Timer (CLINT)
12. One Interrupt controller (PLIC)
13. On board XADC
14. Onboard FTDI based debugger
15. Physical Memory Protection enabled
16. Soft Float library support
17. Ethernet Lite

Still not Clear?

Reach us at!

Our mail-id: [email protected]

Forum

https://groups.io/g/sp2020-shakti/topics

Frequently Asked Questions

What should I do if I get error while loading shared libraries: libpython3.7m.so.1.0: cannot open shared object file: No such file or directory?
You may get this error while you run any RISC-V GDB. Note the python version missing, Install the respective package (Either 3.6 or 3.7).
```
  sudo apt-get install libpython3.7-dev
```
What should I do if I get "error while loading shared libraries: libftdi1.so.2: cannot open shared object file: No such file or directory"?
You may get this error while you run any RISC-V OpenOCD. Pay attention to the package missing Here libFTDI is the missing file, so install the respective package.
```
sudo apt-get install libftdi1 libftdi1-2
```
libFTDI is an Open source library to communicate to FTDI chips, including the popular bitbang mode.
What should I do if I get "error while loading shared libraries: libmpfr.so.4: cannot open shared object file: No such file or directory"?
You may get this error while you run any of the Shakti-tools. Create a soft link for libmpfr.
```
sudo ln -s /usr/lib/x86_64-linux-gnu/libmpfr.so.6 /usr/lib/x86_64-linux-gnu/libmpfr.so.4
```
What should I do if I get "miniterm.py: command not found" error?
- Download the pyserial package
- If this download fails, click here
- Follow the below commands
  Note: Move into the folder into which pyserial is downloaded, then extract using tar command
```
tar -zxvf pyserial-2.6.tar.gz
```
```
cd pyserial-2.6
```
```
python setup.py build
```
```
sudo python setup.py install
```
What should I do if I get "could not open port '/dev/ttyUSB1': [Errno 2] could not open port /dev/ttyUSB1: [Errno 2] No such file or directory: '/dev/ttyUSB1'"?

USB1 is not a valid port in this case, Press tab once to automatically get the port to which the board is connected. Press tab twice to see the available options.

MeitY

स्वदेशी Microprocessor Challenge 2020

Innovate Solutions for आत्मनिर्भर भारत

Welcome to the स्वदेशी Microprocessor Challenge using Shakti!

Here you can get all information needed to build your application using Shakti SoC

Understanding Shakti Processors

E-Class

C-Class

Shakti ecosystem

Shakti-SDK

Operating systems

IDE

WHERE DO I START?

Step 1: System Requirements for Shakti Ecosystem

Recommended:

Step 2: Installing Shakti SDK

Step 3: Installing the Shakti Tool-chain

Step 4: Configuring the FPGA

Step 5: Develop, build and execute an Application

Step 6: Selecting the SoC for the स्वदेशी Microprocessor Challenge

Pinaka

Parashu

Vajra

Stuck Somewhere?

FAQ

Youtube

Blog

Learn with Shakti

Still not Clear?

Reach us at!

Forum

Frequently Asked Questions

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