Weekly Progess of BeagleWire Software Project

ombhilare999 · June 30, 2021, 1:55pm

My Daily Updates can be found here

ombhilare999 · June 30, 2021, 4:32pm

Week 1 (7 June - 14 June)

Prepared Slides for Intro video: Slides
Intro Video On youtube: Intro: BeagleWire Software | GSoC2021 | BeagleBoard.org
Flashed BBB with New iot buster image
Trying to run the tools from my system and doing scp the bin files to the bbb for flashing to the BeagleWire
Wrote a getting started blog for beaglewire with all the steps Getting BBB Ready for BeagleWire
Gone through the LKM tutorial of derekmolloy

ombhilare999 · June 30, 2021, 4:32pm

Week 2 (14 June - 21 June)

Completed a getting started blog for beaglewire with all the steps Getting BBB Ready for BeagleWire
Build the LKM module on the beaglewire and tried flashing the fpga via Kernel Space
Closed the following issues on the beaglewire repo
#20
#19
#13
#2

ombhilare999 · June 30, 2021, 4:32pm

Week 3 (21 June - 28 June)

Created a List on BeagleWire Repo: Task/issue List
Studied GPMC protocol and figuring out timing diagrams
Explored the possibility of GPMC to Wishbone conversion: GPMC to Wishbone / Avalon Maste
Wrote a GPMC to Wishbone Wrapper which passed initial testing: gpmc_to_wishbone
PR merged to the Master branch of BeagleWire: #2


Updated the LKM module with the changes

README added for Examples

Makefile improved

Solved issue #15

ombhilare999 · June 30, 2021, 4:32pm

Week 4 (28 June - 5 July)

Created a wiki on BeagleWire Repo: wiki
Added Docs for individual examples: Docs
Made changes in the gpmc to wishbone wrapper
Wrote testbench for the gpmc to wishbone wrapper, also tested both write and read conditions.
Waveforms of the simulation read and write tests:

image text

Tested GPMC to Wishbone Wrapper in the Hardware with arm blinks example.
Createad Led Controller with wishbone bus for arm blink

Verilog Code: led_wb.v

ombhilare999 · July 7, 2021, 2:53pm

Week 5 (5 July - 16 July)

Made changes in the gpmc to wishbone wrapper and arm blink wishbone example after mentor’s review.
Detailed Changes in PR thread: https://github.com/BeagleWire/BeagleWire/pull/3
Closed the issue #12
Did Random memory read tests in the gpmc to wishbone wrapper
Working on the Wishbone intercon with this reference
Prepared two PMODs each having a bar graph LED. In wishbone intercon test each pmod will act as wishbone slave.

Bar Graph with Beaglewire video demo

Created platform for beaglewire in litex boards.

beaglewire.py

Beaglewire yaml file for litedram: litedram/examples/beaglewire.yml at master · BeagleWire/litedram · GitHub
Produced SDRAM IP:

github.com

BeagleWire/litedram/blob/master/build/gateware/litedram_core.v

//--------------------------------------------------------------------------------
// Auto-generated by Migen (3ffd64c) & LiteX (f9f1b8e) on 2021-07-13 20:57:12
//--------------------------------------------------------------------------------
module litedram_core(
	input wire clk,
	input wire rst,
	inout wire [12:0] sdram_a,
	inout wire [1:0] sdram_ba,
	inout wire sdram_ras_n,
	inout wire sdram_cas_n,
	inout wire sdram_we_n,
	inout wire sdram_cs_n,
	inout wire sdram_dm,
	inout wire [7:0] sdram_dq,
	inout wire sdram_cke,
	output wire init_done,
	output wire init_error,
	input wire [29:0] wb_ctrl_adr,
	input wire [31:0] wb_ctrl_dat_w,
	output wire [31:0] wb_ctrl_dat_r,

This file has been truncated. show original

ombhilare999 · July 28, 2021, 4:20pm

Week 6 (17 July - 24 July)

Now we can also flash beaglewire with spidev.
With the help of Michael we got the litex core running on the FPGA for interfacing the SDRAM IP with beaglewire.
Litexcore consist of Serv microcontroller + Litedram

unknown )

On-going blockers:
• N/A

ombhilare999 · July 28, 2021, 4:27pm

Week 7 (25 July - 1 Aug)

Closed Following Issues:
- #10
- #7
- #8
Added Helper scripts for dtc, spi flash.
Explored way to tristate SPI pins without adding overlay for it.
Adding Litex with gpmc to wishbone wrapper.

On-going blockers:

In beaglewire we had three dtc files as of now:

overlay with spi enabled.
overlay with spi tristated (0x37) (we wanted to tristate spi so that it doesn’t interfer with fpga)
overlay with ice40 on spi.

I wanted to change the pin mode of the pins in run time to avoid changing overlay and reboot process.
config-pin utility requires the enable universal overlay which causes lots of pinmux issue with gpmc that we are using in beaglewire. So wanted some other way to change pinmode.

ombhilare999 · August 4, 2021, 3:54pm

Week 8 (2 Aug - 9 Aug )

Got the Wishbone tool working on litex, using which we can access the litex core memory from the beaglebone
Demo: Litex - BeagleWire - YouTube
Wrote a top verilog file for GPMC access of litex core.
Interfaced VGA with the beaglewire with the help of PMOD,
Demo: https://i.imgur.com/HaOZ0JX.mp4

On Going Blockers:

pinmux issue of dts with gpmc pin modes

ombhilare999 · August 11, 2021, 4:28pm

Week 9 (10 Aug - 17 Aug )

Added GPMC modes in beagleboard dtsi file.
Added GPMC phandle in bbb bus file.
Wrote a new dts file for spi programming of FPGA
Demo: https://asciinema.org/a/ICSlldHwYC4RtOHG0oJkIRUBd
Repo: https://github.com/BeagleWire/BeagleBoard-DeviceTrees
Updated the documentation: https://beaglewire.github.io/

On Going Blockers:

GPMC - litex debugging