UART terminal (firmware output)

autoscroll

Firmware

Board — filters the preset list to firmware built for it

eth_http — web client (DHCP+TCP+HTTP)

Load a custom firmware: .bin (raw flash), .hex (Intel HEX), .elf (loadable segments + symbols), or a .map file for the symbol table only. Firmware files boot immediately. Nothing runs until you press Boot preset or load a file.

Network gateway

offline — using the scripted network (netsim)

When connected, all Ethernet frames are sent to a real network stack (openhw-gw + gVisor) instead of netsim. Run openhw-gw locally first. Note: GitHub Pages serves https, which blocks plain ws:// — serve this page over http:// when using a gateway.

Machine state

0instructions

0.0MIPS

0batches

0rounds

—PC

—SP

—XPSR

—firmware

—net up/down (wall)

Reset / Boot

Reset CPU = real-device NRST pulse (vector table, peripherals kept). Boot = full reboot. Hold NRST pins the core in reset until released — then Reset or Boot for the edge.

Board LED

○ no firmware

Packet capture (pcap)

0 frames buffered

Records every Ethernet frame both ways (guest TX + delivered RX) with microsecond timestamps — opens directly in Wireshark/tcpdump.

GPIO

LTDC display

scanout idle

OLED SSD1306 (I2C)

no OLED firmware

TFT ILI9341 (SPI)

no TFT firmware

Buzzer (TIM PWM)

no buzzer firmware

Speaker (I2S)

no audio firmware

RTC DS3231 (I2C)

no RTC firmware

Trace (waveform)

Address (hex, e.g. GPIOA ODR 0x40020014) Label (optional)

Samples the address once per frame (up to 4 channels, 256 points each). DMA activity shows as a per-frame pending-count bar row. Digital channels render bit 0 by default — append :bN to the address (e.g. 0x40020014:b5) to plot bit N.

ETH PPS pin

○ no PTP firmware

Peripherals

Memory Watch

Address (hex, e.g. 0x40023830) Label (optional)

Live 32-bit reads each frame. Poke a hex value to write it. Reads are 32-bit aligned.

CAN injection

CAN ID (hex, 11-bit, e.g. 123) Data (up to 8 hex bytes, space-separated, e.g. 48 45 4C 4C 4F 21 21 21 = "HELLO!!!")

Boot can_host_rx (or can_demo) first, then inject a frame — the firmware receives it on its CAN RX FIFO and prints the ID + data. Standard 11-bit frames only.