Posts tagged linux

ALINX AX7020, Stage 5 Complete: Cold Power-On to a Bitstream API, Nobody Logged In

September 15, 2026 fpga alinx zynq yocto systemd kexec fastapi rest-api linux u-boot qspi nginx embedded bring-up deployment

The open bitstream pipeline for the ALINX AX7020 is finished: power on, the maintenance Linux in QSPI fetches the full image from a company-internal URL, kexecs into it, systemd starts the FastAPI service, and a curl loads a Yosys/nextpnr bitstream into the FPGA. No SD card, no vendor tool, no hand on the board; plus the detours, including a JTAG adapter that quietly powered the flash chip through a power cycle.

ALINX AX7020, Stages 4 & 5: An Open Bitstream Over REST, and the One Missing Line That Hangs Both Cores

September 14, 2026 fpga alinx zynq yosys nextpnr prjxray openxc7 fpga-manager kexec fastapi rest-api yocto linux jtag openocd embedded bring-up

Stages 4 and 5 of the open bitstream pipeline: a Yosys/nextpnr bitstream loaded into the ALINX AX7020 through the kernel's FPGA manager, a kexec updater that finally runs, and a FastAPI service that accepts bitstreams over HTTP, all without a single vendor tool; then the detours, including a PL design that silently drowned both Cortex-A9 cores in FIQs.

skAInet Edge-Compute: The Box We Kept Rebuilding Now Has a Product Page

September 1, 2026 electronics embedded linux monitoring engineering

Auto-Intern's skAInet Edge-Compute is now a product with its own site: a sealed M12-PoE switch, router and 8-core Linux compute module for industrial edge data acquisition. What it is, where it came from, and where I fit in.

ALINX AX7020, Stages 2 & 3: A Yocto Linux in QSPI Flash That Fetches Its Own Updates

August 31, 2026 fpga alinx zynq yocto linux u-boot kexec dropbear fit-image qspi embedded bring-up

Stages 2 and 3 of the open bitstream pipeline: a self-built Yocto Linux for the ALINX AX7020, resident in QSPI flash, discoverable on the company network, key-only SSH: the walkthrough that works, followed by the nine detours it took to get there.

ALINX AX7020 Bring-up: Mainline U-Boot Over JTAG, No FSBL, No Serial Cable

August 30, 2026 fpga alinx zynq jtag openocd u-boot spl device-tree netconsole bring-up linux

Stage 1 of the open bitstream pipeline: putting mainline U-Boot on an ALINX AX7020 over JTAG and Ethernet only: a clean walkthrough of what works, followed by the nine detours it took to find out.

Deploying Hardware Like Software: A Bitstream Pipeline for the Zynq

August 23, 2026 fpga embedded linux open-source

Alinx sent me an AX7020 board. Here is the plan: an open-source path from JTAG bring-up to a REST API that accepts a bitstream and loads it onto the FPGA, no vendor tools in the loop.

Dual Uplink, Part Two: From Failover to Load Balancing (and the Two Bugs That Broke It)

July 12, 2026 networking linux

The follow-up to our dual-uplink failover setup: weighted multipath load balancing, source-based policy routing, pinning a host to one link, and the two persistence bugs that silently killed it on every reboot.

Viewing Plots from My Homelab Over SSH X11 Forwarding

May 13, 2026 linux networking

How to forward X11 through a bastion server to display images and plots from a home machine on a university workstation, without copying files.

Dual Uplink for 15 People: Starlink, Heimdall, and Linux Routing

February 27, 2026 networking linux

How to set up dual uplink failover for an office network using Linux routing, Starlink, and metric-based default routes — with a Python dashboard to monitor both links in real time.

Tag: linux