  Riscduino Dual Risc Core SOC


Permission to use, copy, modify, and/or distribute this soc for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOC IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOC INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOC.

Overview

Riscduino is a Dual 32 bit RISC V based SOC design pin compatible to arduino platform and this soc targeted for efabless Shuttle program. This project uses only open source tool set for simulation,synthesis and backend tools. The SOC flow follow the openlane methodology and SOC environment is compatible with efabless/carvel methodology.

Riscduino Block Diagram

Key features

    * Open sourced under Apache-2.0 License (see LICENSE file) - unrestricted commercial use allowed.
    * Dual 32 Bit RISC-V core
    * 2KB SRAM for instruction cache 
    * 2KB SRAM for data cache
    * 2KB SRAM for Tightly coupled memory - For Data Memory
    * Quad SPI Master with 4 Chip select, supports both SPI flash and SRAM interface
    * 2 x UART with 16Byte FIFO
    * USB 1.1 Host
    * I2C Master
    * UART Master
    * Simple SPI Master with 4 Chip select
    * 6 Channel ADC (in Progress)
    * 6 x PWM
    * 3 x Timer (16 Bit), 1us/1ms/1second resolution
    * 2 x ws281x driver
    * 16 Hardware Semaphore
    * FPU (SP) Core
    * AES 128 Bit Core
    * RTC Core
    * Pin Compatbible to arduino uno
    * Wishbone compatible design
    * Written in System Verilog
    * Open-source tool set
       * simulation - iverilog
       * synthesis  - yosys
       * backend/sta - openlane tool set
    * Verification suite provided.

Riscduino derivatives

MPW Shuttle on Riscduino

MPW	Tape-out	Project Name	Project Details	Github	Efabless	Tapeout Link
MPW-2	18-June-2021	YiFive	Single 32bit RISCV core without cache + SDRAM Controller + WB Interconnect	Link	Link	Link
MPW-3	15-Nov-2021	Riscduino	Single 32bit RISCV core without cache + Onchip SRAM + WB Interconnect	Link	Link	Link
MPW-4	31-Dec-2021	Riscduino-R1	Single 32bit RISCV core with cache + Onchip SRAM + WB Inter Connect	Link	Link	Link
MPW-5	21-Mar-2022	Riscduino-DCORE (D0)	Dual 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-5	21-Mar-2022	Riscduino-QCORE (Q0)	Quad 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-6	07-June-2022	Riscduino-SCORE (S3)	Single 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-6	07-June-2022	Riscduino-DCORE (D1)	Dual 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-6	07-June-2022	Riscduino-QCORE (Q1)	Quad 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-7	12-Sept-2022	Riscduino-SCORE (S4)	Single 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-7	12-Sept-2022	Riscduino-DCORE (D3)	Dual 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-7	12-Sept-2022	Riscduino-QCORE (Q1)	Quad 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-8	31-Dec-2022	Riscduino-DCORE (D4)	Dual 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link
MPW-8	12-Sept-2022	Riscduino-QCORE (Q3)	Quad 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar	Link	Link	Link

SOC Pin Mapping

Carvel SOC provides 38 GPIO pins for user functionality. Riscduino SOC GPIO Pin Mapping as follows vs ATMEGA328 and Arudino

ATMGA328 Pin No	Functionality	Arudino Pin Name	Carvel Pin Mapping
Pin-1	PC6/RESET	D20	digital_io[5]
Pin-2	PD0/RXD[0]	D0	digital_io[6]
Pin-3	PD1/TXD[0]	D1	digital_io[7]/analog_io[0]
Pin-4	PD2/RXD[1]/INT0	D2	digital_io[8]/analog_io[1]
Pin-5	PD3/INT1/OC2B(PWM0)	D3	digital_io[9]/analog_io[2]
Pin-6	PD4/TXD[1]	D4	digital_io[10]/analog_io[3]
Pin-7	VCC		-
Pin-8	GND		-
Pin-9	PB6/XTAL1/TOSC1	D21	digital_io[11]/analog_io[4]
Pin-10	PB7/XTAL2/TOSC2	D22	digital_io[12]/analog_io[5]
Pin-11	PD5/SS[3]/OC0B(PWM1)/T1	D5	digital_io[13]/analog_io[6]
Pin-12	PD6/SS[2]/OC0A(PWM2)/AIN0	D6	digital_io[14]/analog_io[7]
Pin-13	PD7/A1N1	D7	digital_io[15]/analog_io[8]
Pin-14	PB0/CLKO/ICP1	D8	digital_io[16]/analog_io[9]
Pin-15	PB1/SS[1]OC1A(PWM3)	D9	digital_io[17]/analog_io[10]
Pin-16	PB2/SS[0]/OC1B(PWM4)	D10	digital_io[18]/analog_io[11]
Pin-17	PB3/MOSI/OC2A(PWM5)	D11	digital_io[19]/analog_io[12]
Pin-18	PB4/MISO	D12	digital_io[20]/analog_io[13]
Pin-19	PB5/SCK	D13	digital_io[21]/analog_io[14]
Pin-20	AVCC		-
Pin-21	AREF		analog_io[23]
Pin-22	GND		-
Pin-23	PC0/uartm_rxd/ADC0	D14/A0	digital_io[22]/analog_io[15]
Pin-24	PC1/uartm/ADC1	D15/A1	digital_io[23]/analog_io[16]
Pin-25	PC2/usb_dp/ADC2	D16/A2	digital_io[24]/analog_io[17]
Pin-26	PC3/usb_dn/ADC3	D17/A3	digital_io[25]/analog_io[18]
Pin-27	PC4/ADC4/SDA	D18/A4	digital_io[26]/analog_io[19]
Pin-28	PC5/ADC5/SCL	D19/A5	digital_io[27]/analog_io[20]
Additional Pad used for Externam ROM/RAM/USB
Sflash	sflash_sck		digital_io[28]/Analog[21]
SFlash	sflash_ss0		digital_io[29]/Analog[22]
SFlash	sflash_ss1/AREF		digital_io[30]/Analog[23]
SFlash	sflash_ss2		digital_io[31]/Analog[24]
SFlash	sflash_ss3		digital_io[32]/Analog[25]
SFlash	sflash_io0		digital_io[33]/Analog[26]
SFlash	sflash_io1		digital_io[34]/Analog[27]
SFlash	sflash_io2		digital_io[35]/Analog[28]
SFlash	sflash_io3		digital_io[36]
DEBUG	dbg_clk_mon		digital_io[37]
SPARE	PA0		digital_io[0]
SPARE	PA1	D23	digital_io[1]
SPARE	PA2	D24	digital_io[2]
SPARE	PA3		digital_io[3]
SPARE	PA4	D25	digital_io[4]

Riscduino documentation

Riscduino documentation available at : https://riscduino.readthedocs.io/en/latest/

Arduino ide integration

We are in initial phase of Riscduino board integration into arduino and integration details are available at : https://github.com/dineshannayya/riscduino_tools/

Sub IP features

RISC V Core

Riscduino SOC Integrated Dual 32 Bits RISC V core. Initial version of Single core RISC-V core is picked from Syntacore SCR1 (https://github.com/syntacore/scr1)

RISC V core customization for Riscduino SOC

Following Design changes are done on the basic version of syntacore RISC core

   * Some of the sv syntex are changed to standard verilog format to make compatibile with opensource tool iverilog & yosys
   * local Instruction Memory depth increased from 4 to 8 location
   * Instruction Mem Request are changed from Single word to 4 Word Burst
   * Multiplication and Divsion are changed to improve timing
   * Additional pipe line stages added to improve the RISC timing closure near to 50Mhz
   * 2KB instruction cache 
   * 2KB data cache
   * Additional router are added towards instruction cache
   * Additional router are added towards data cache
   * Dual core related changes
   * Modified AXI/AHB interface to wishbone interface for instruction and data memory interface

Block Diagram

RISC V Core Key feature

   * RV32I or RV32E ISA base + optional RVM and RVC standard extensions
   * Machine privilege mode only
   * 2 to 5 stage pipeline
   * 2KB icache
   * 2KB dcache
   * Optional Integrated Programmable Interrupt Controller with 16 IRQ lines
   * Optional RISC-V Debug subsystem with JTAG interface
   * Optional on-chip Tightly-Coupled Memory

6 Channel SAR ADC

In Process - Looking for community help ...

SOC Memory Map

RISC IMEM	RISC DMEM	EXT MAP	Target IP
0x0000_0000 to 0x0FFF_FFFF	0x0000_0000 to 0x0FFF_FFFF	0x0000_0000 to 0x0FFF_FFFF	QSPI FLASH MEMORY
0x1000_0000 to 0x1000_00FF	0x1000_0000 to 0x1000_00FF	0x1000_0000 to 0x1000_00FF	QSPI Config Reg
0x1001_0000 to 0x1001_003F	0x1001_0000 to 0x1001_003F	0x1001_0000 to 0x1001_003F	UART
0x1001_0040 to 0x1001_007F	0x1001_0040 to 0x1001_007F	0x1001_0040 to 0x1001_007F	I2C
0x1001_0080 to 0x1001_00BF	0x1001_0080 to 0x1001_00BF	0x1001_0080 to 0x1001_00BF	USB
0x1001_00C0 to 0x1001_00FF	0x1001_00C0 to 0x1001_00FF	0x1001_00C0 to 0x1001_00FF	SSPI
0x1001_01C0 to 0x1001_013F	0x1001_01C0 to 0x1001_013F	0x1001_01C0 to 0x1001_013F	SSPI
0x1002_0080 to 0x1002_00FF	0x1002_0080 to 0x1002_00FF	0x1002_0080 to 0x1002_00FF	PINMUX
-	-	0x3080_0000 to 0x3080_00FF	WB HOST

SOC Size

Block	Total Cell	Combo	Seq
RISC	52527	46858	5669
QSPI	8654	7149	1505
UART_I2C_USB_SPI	15926	13061	2865
WB_HOST	5800	4701	1099
WB_INTC	11477	10081	1396
PINMUX	6746	5574	1172

TOTAL	120381	103826	16555

Prerequisites

Docker (ensure docker daemon is running) -- tested with version 19.03.12, but any recent version should suffice.

Step-1: Docker in ubuntu 20.04 version

   sudo apt update
   sudo apt-get install apt-transport-https curl rtificates -agent software-properties-common
   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
   sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
   sudo apt update
   apt-cache policy docker-ce
   sudo apt install docker-ce

   #Add User Name to docker
   sudo usermod -aG docker <your user name>
   # Reboot the system to enable the docker setup

Step-2: Clone , update the Submodule, unzip the content

   git clone https://github.com/dineshannayya/riscduino.git
   cd riscduino
   git submodule init
   git submodule update
   make unzip

Note-1: RTL to GDS Docker

- Required openlane and pdk are moved inside the riscduino docker to avoid the external dependency. 
- flow automatically pull the required docker based on MPW version.
- RTL to gds docker is hardcoded inside File: openlane/Makefile

     OPENLANE_TAG = mpw9
     OPENLANE_IMAGE_NAME = riscduino/openlane:$(OPENLANE_TAG)

Note-1.1: View the RTL to GDS Docker content

- for MPW-9 caravel pdk and openlane avaible inside riscduino/openlane:mpw9 docker 
- caravel, openlane and pdk envionment are automatically pointed to internal docker pointer
- To view the docker contents

    docker run -ti --rm riscduino/openlane:mpw9  bash
    cd /opt/pdk_mpw9     -  pdk folder
    cd /opt/caravel      -  caravel folder 
    cd /openlane         -  openlane folder
    env   - Show the internally defined env's
        CARAVEL_ROOT=/opt/caravel
        PDK_ROOT=/opt/pdk_mpw9

Note-2: RTL Simulation Docker

- Required caravel and pdk are moved inside the riscduino docker to avoid the external dependency. 
- flow automatically pull the required docker based on MPW version.
- To view the docker contents
- RTL simulation docker hardcoded inside File: Makefile
    simenv:
    docker pull riscduino/dv_setup:mpw6

Note-2.1: View the RTL Simulation Docker content

- for MPW-9 caravel and pdk avaible inside riscduino/dv_setup:mpw9 docker this is used for RTL to gds flows
- caravel and pdk envionment are automatically pointed to internal docker pointer
- To view the docker contents

    docker run -ti --rm riscduino/dv_setup:mpw9  bash
    cd /opt/pdk_mpw9     -  pdk folder
    cd /opt/caravel      -  caravel folder 
    env   - Show the internally defined env's
        CARAVEL_ROOT=/opt/caravel
        PDK_ROOT=/opt/pdk_mpw6

Note-3: Clock Gate Plugin integration

Hack-1: Modify following files for synthesis script update

   Directory: OpenSTA (hacks/src/OpenSTA)
   Source Files:
	   OpenLane/scripts/yosys/synth.tcl
	   OpenLane/configuration/synthesis.tcl
	   OpenLane/scripts/utils/utils.tcl
    Modifield File: 
       hacks/clk_gating/synth.tcl
       hacks/clk_gating/synthesis.tcl
       hacks/clk_gating/utils.tcl

Hack-2: Create a pluging directory in openlane and add following files

plugin
   └── yosys
       └── Lighter
           ├── clock_gating_plugin.cc
           ├── README.md
           ├── sky130_clkg_blackbox.v
           └── sky130_ff_map.v

Hack-3: Add ENV to enable clock gating in config.tcl

   set ::env(SYNTH_ENB_CG) 1

Hack-4: Check Clock gate insertion in Generated netlist file

   grep sky130_fd_sc_hd__dlclkp  <your netlist file>

Tests preparation

The simulation package includes the following tests:

Standalone Riscduino SOC Specific Test case

1.user_basic - Basic test case to validate strap and clocks
2.user_uart - Standalone Risc with UART-0 Test
3.user_uart1 - Standalone Risc with UART-1 Test
4.user_risc_boot - Standalone User Risc core boot
4.risc_boot - Complete caravel User Risc core boot
5.user_qspi - Standalone Quad SPI test
6.user_sspi - Standalone SSPI test
7.user_i2c - Standalone I2C test
8.user_usb - Standalone USB Host test
9.user_gpio - Standalone GPIO Test
10.user_aes - AES computation through Riscv core
11.user_spi_isp - Device boot with SPI as ISP
12.user_timer - Standalone timer Test
13.user_uart_master - Standalone uart master test
14.user_sram_exec - Riscv Boot with code running in SRAM
15.user_cache_bypass - Riscv Boot without icache and dcache
16.user_pwm -Standalone pwm Test
17.user_sema -Standalone validation of hardware Semaphore function
18.riscv_regress -Standalone riscv compliance and regression test suite
19.user_rtc -Standalone RTC core test
20.user_aes_core -Standalone AES Core test
21.user_fpu_core -Standalone FPU(SP) Core test
22.user_rtc -Standalone RTC core test
24.user_ir_tx -Standalone IR Transmitted Test
25.user_ir_rx -Standalone IR Receiver Test
26.user_random - User Random core test
27.step_motor_controller - Standalone Stepper Motor Controller

Caravel+RISCDUINO Integrated Specific Test case

1.wb_port - Complete caravel User Wishbone validation
2.uart_master_test1 - complete caravel user uart master test with baud control from LA port
3.uart_master_test2 - complete caravel user uart master test based on auto baud detection
4.risc_boot - Complete caravel User Risc core boot
5.caravel_hkspi - Caravel House Keeping SPI test case

Arduino Based Test Case

1.arduino_arrays - Validation of Array function
2.arduino_digital_port_control - Validation for AD5206 digital potentiometer through SPI
3.arduino_i2c_scaner - I2C port scanner
4.arduino_risc_boot - Riscv Basic Boot
5.arduino_timer_intr - Timer Interrupt handling
6.arduino_ascii_table - Ascii Table Display
7.arduino_gpio_intr - GPIO Interrupt generation
8.arduino_i2c_wr_rd - I2C Write and Read access
9.arduino_string - Validation of String function
10.arduino_ws281x - Validation of ws281x serial protocol
11.arduino_character_analysis - uart Input Character analysis
12.arduino_hello_world - Basic hello world display
13.arduino_multi_serial - Validation of Two Serail port
14.arduino_switchCase2 - Validation of switch case

Running Simulation

Examples:

    make verify-wb_port                        - User Wishbone Test from caravel
    make verify-risc_boot                      - User Risc core test from caravel
    make verify-uart_master                    - User uart master test from caravel
    make verify-user_basic                     - Standalone Basic signal and clock divider test
    make verify-user_uart                      - Standalone user uart-0 test using user risc core
    make verify-user_uart1                     - Standalone user uart-0 test using user risc core
    make verify-user_i2cm                      - Standalone user i2c test
    make verify-user_risc_boot                 - standalone user risc core-0 boot test
    make verify-user_pwm                       - standalone user pwm test
    make verify-user_timer                     - standalone user timer test
    make verify-user_sspi                      - standalone user spi test
    make verify-user_qspi                      - standalone user quad spi test
    make verify-user_usb                       - standalone user usb host test
    make verify-user_gpio                      - standalone user gpio test
    make verify-user_aes                       - standalone aes test with risc core-0
    make verify-user_cache_bypass              - standalone icache and dcache bypass test with risc core-0
    make verify-user_uart_master               - standalone user uart master test
    make verify-user_sram_exec                 - standalone riscv core-0 test with executing code from data memory
    make verify-riscv_regress                  - standalone riscv compliance test suite
    make verify-arduino_risc_boot              - standalone riscv core-0 boot using arduino tool set
    make verify-arduino_hello_world            - standalone riscv core-0 hello world test using arduino tool set
    make verify-arduino_digital_port_control   - standalone riscv core-0 digital port control using arduino tool set
    make verify-arduino_ascii_table            - standalone riscv core-0 ascii table using arduino tool set
    make verify-arduino_character_analysis     - standalone riscv core-0 character analysis using arduino tool set
    make verify-arduino_multi_serial           - standalone riscv core-0 multi uart test using arduino tool set
    make verify-arduino_switchCase2            - standalone riscv core-0 switch case using arduino tool set
    make verify-arduino_risc_boot              - standalone riscv core-0 boot test using arduino tool set
    make verify-arduino_string                 - standalone riscv core-0 string usage test using arduino tool set
    
    make verify-user_mcore                     - standalone riscv multi-core test
    make verify-user_sram_exec RISC_CORE=1     - standalone riscv core-1 test with executing code from data memory
    make verify-user_risc_boot RISC_CORE=1     - standalone user risc core-1 boot test
    make verify-user_uart RISC_CORE=1          - Standalone user uart test using user risc core-1
    make verify-user_uart1 RISC_CORE=1         - Standalone user uart test using user risc core-1
    make verify-user_aes  RISC_CORE=1          - standalone aes test with risc core-1
    make verify-user_cache_bypass RISC_CORE=1  - standalone icache and dcache bypass test with risc core-1
    make verify-arduino_risc_boot RISC_CORE=1  - standalone riscv core-1 boot using arduino tool set
    
    make verify-user_uart SIM=RTL DUMP=OFF     - Standalone user uart-0 test using user risc core with waveform dump off
    make verify-user_uart SIM=RTL DUMP=ON      - Standalone user uart-0 test using user risc core with waveform dump on
    make verify-user_uart SIM=GL DUMP=OFF      - Standalone user uart-0 test using user risc core with gatelevel netlist
    make verify-user_uart SIM=GL DUMP=ON       - Standalone user uart-0 test using user risc core with gatelevel netlist and waveform on

Running RTL to GDS flows

First run the individual macro file
Last run the user_project_wrapper

   cd openlane
   make pinmux
   make qspim_top
   make uart_i2cm_usb_spi_top
   make wb_host
   make wb_interconnect
   make ycr_intf
   make ycr_core_top
   make ycr_iconnect
   make user_project_wrapper

#Timing Analysis

Timing Analysis setup

   make setup-timing-scripts
   make install
   make install_mcw

his will update Caravel design files and install the scripts for running timing.

Running Timing Analysis

make extract-parasitics
make create-spef-mapping
make caravel-sta

#Other Miscellaneous Targets The makefile provides a number of useful that targets that can run LVS, DRC, and XOR checks on your hardened design outside of openlane’s flow.

Run make help to display available targets.

Run lvs on the mag view,

make lvs-<macro_name>

Run lvs on the gds,

make lvs-gds-<macro_name>

Run lvs on the maglef,

make lvs-maglef-<macro_name>

Run drc using magic,

make drc-<macro_name>

Run antenna check using magic,

make antenna-<macro_name>

Run XOR check,

make xor-wrapper

Tool Sets

Riscduino Soc flow uses Openlane tool sets.

Synthesis
1. yosys - Performs RTL synthesis
2. abc - Performs technology mapping
3. OpenSTA - Pefroms static timing analysis on the resulting netlist to generate timing reports
Floorplan and PDN
1. init_fp - Defines the core area for the macro as well as the rows (used for placement) and the tracks (used for routing)
2. ioplacer - Places the macro input and output ports
3. pdn - Generates the power distribution network
4. tapcell - Inserts welltap and decap cells in the floorplan
Placement
1. RePLace - Performs global placement
2. Resizer - Performs optional optimizations on the design
3. OpenPhySyn - Performs timing optimizations on the design
4. OpenDP - Perfroms detailed placement to legalize the globally placed components
CTS
1. TritonCTS - Synthesizes the clock distribution network (the clock tree)
Routing
1. FastRoute - Performs global routing to generate a guide file for the detailed router
2. CU-GR - Another option for performing global routing.
3. TritonRoute - Performs detailed routing
4. SPEF-Extractor - Performs SPEF extraction
GDSII Generation
1. Magic - Streams out the final GDSII layout file from the routed def
2. Klayout - Streams out the final GDSII layout file from the routed def as a back-up
Checks
1. Magic - Performs DRC Checks & Antenna Checks
2. Klayout - Performs DRC Checks
3. Netgen - Performs LVS Checks
4. CVC - Performs Circuit Validity Checks

How To Contribute

We are looking for community help in following activity, interested user can ping me in efabless slack platform

Analog Design - ADC, DAC, PLL,
Digital Design - New IP Integration, Encription,DSP, DMA controller, 10Mb MAC, Floating point functions
Verification - Improving the Verification flow
Linux Porting - Build Root integration
Arudino Software Update - Tool Customisation for Riscduino, Adding additional plug-in and Riscv compilation support
Riscv Simulator - integration to Riscduino
Any other ideas

Contacts

Report an issue: https://github.com/dineshannayya/riscduino/issues
Group Email: https://groups.google.com/g/riscduino

Reference

Syntacore - https://github.com/syntacore/scr1
DCore Riscv - https://github.com/dineshannayya/ycr2c
quad spi - https://github.com/dineshannayya/qspim
security core - https://github.com/dineshannayya/security_core
fpu - https://github.com/dineshannayya/fpu
rtc - https://github.com/dineshannayya/rtc
uart - https://github.com/dineshannayya/uart2spi
jtag vpi - https://github.com/fjullien/jtag_vpi
clock gating - https://github.com/AUCOHL/Lighter
i2c - http://www.opencores.org/projects/i2c/
USB1 core - https://github.com/ultraembedded/core_usb_host
USB1 phy - https://github.com/ultraembedded/core_usb_fs_phy
8 bit DAC - https://github.com/pramitpal/8bit_dac
IR-Receiver - https://github.com/JulienOury/ChristmasTreeController/
Random Number - https://github.com/JulienOury/ChristmasTreeController/
Stepper Motor - https://github.com/JulienOury/ChristmasTreeController/

Youtube video on Riscduino

Riscduino CI2206Q Bringup Status - https://youtu.be/EzxGh2Bxo_o
Riscduino Live Demo - https://youtu.be/FrcUKUgzDW4
Riscduino Aim - https://www.youtube.com/watch?v=lFVnicPhTI0
Riscduino MPW-2 Bringup Status - https://www.youtube.com/watch?v=Qo_RZ8Fo--c

News on Riscduino

Riscduino OpenRoad Article - https://theopenroadproject.org/implementation-of-riscduino-core-using-a-hierarchical-design-flow/
riscv.org News - https://riscv.org/news/2023/01/implementation-of-riscduino-core-using-a-hierarchical-design-flow-dinesh-annayya-openroad/

Name		Name	Last commit message	Last commit date
Latest commit History 115 Commits
checks		checks
def		def
deps/timing-scripts		deps/timing-scripts
docs/source/_static		docs/source/_static
env		env
gds		gds
hacks		hacks
lef		lef
lib		lib
openlane		openlane
plugin/Lighter		plugin/Lighter
scripts		scripts
sdc		sdc
signoff		signoff
spef		spef
sta		sta
verilog		verilog
.gitmodules		.gitmodules
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
info.yaml		info.yaml
run_regress		run_regress
test		test

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dineshannayya/riscduino_dcore

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