warehack.ing/hmc472
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Author SHA1 Message Date
Ryan Malloy
a425b4c324 Add OLED display support, standardize Serial0 for UART output 
- Add SSD1306 128x64 OLED display with attenuation bar, dB readout,
  step counter, sweep indicator, and WiFi RSSI
- Switch all debug output to Serial0 (UART0 via CH343) for consistent
  serial comms when USB CDC is not used
- Remove unused USB.h includes from all source files
- Add development notes to CLAUDE.md (no stty, serial config docs)
 2026-02-08 14:10:44 -07:00
Ryan Malloy
9a4f27e8be Wiring diagram: realistic S2 Mini based on WEMOS pinout image 
- Magenta PCB color matching actual board
- USB-C at bottom, dual-column pin headers
- Mounting holes, RST/0 buttons, LED indicator
- Gold through-hole pins with correct pinout
- Added attenuation reference table
 2026-02-03 11:23:14 -07:00
Ryan Malloy
a5b690530f Wiring diagram: use net labels instead of wire traces 2026-02-03 10:56:56 -07:00
Ryan Malloy
86a5db5b08 Optimize pin mapping for direct bitwise GPIO ops 
Rewire GPIO↔HMC472A so GPIO(n) = step bit (n-1):
  GPIO1→V6(0.5dB), GPIO2→V5(1dB), ... GPIO6→V1(16dB)

This enables single-instruction GPIO updates:
  GPIO.out_w1tc = (step & 0x3F) << 1
  GPIO.out_w1ts = (~step) & 0x7E

Replaces 28-line loop with 4-line bitwise code.
 2026-02-03 00:28:33 -07:00
Ryan Malloy
b5794c5f8d Add hardware wiring documentation and KiCad schematic 
- wiring.md: Pin mapping table, module pinout, logic levels
- wiring-diagram.svg: Visual connection diagram (S2 Mini ↔ HMC472A)
- hmc472-controller.kicad_pro/sch: KiCad project for EDA work

GPIO1-6 → V1-V6 (active-low, 16/8/4/2/1/0.5 dB)
5V VBUS → +5V, GND → GND
 2026-02-03 00:04:56 -07:00
Ryan Malloy
db54d05bed Makefile: use esptool directly, add LittleFS and erase targets 
PlatformIO's built-in upload breaks on the S2 Mini (1200bps USB
touch reset disconnects the native USB port). All flash targets
now call esptool directly with the correct S2 partition offsets:
bootloader at 0x1000, firmware at 0x10000, LittleFS at 0x290000.

Also adds USB.begin() before Serial.begin() in main.cpp — required
for ESP32-S2 native USB-CDC to initialize properly.
 2026-02-02 23:32:07 -07:00
Ryan Malloy
fb835c9d5d Fix ESP32-S2 build: USB.h, WDT API, remove duplicate flags 
- Add #include <USB.h> to all .cpp files (required for HWCDCSerial)
- Use ESP-IDF v5.x esp_task_wdt_config_t struct instead of removed API
- Remove duplicate ARDUINO_USB_MODE/CDC flags from platformio.ini
  (board definition already provides these)
 2026-02-02 21:27:24 -07:00
Ryan Malloy
613611d37a Add ESP32-S2 firmware for HMC472A attenuator control 
PlatformIO/Arduino firmware for WEMOS/LOLIN S2 Mini:
- 6-bit GPIO control (GPIOs 1-6) with glitch-free register writes
- REST API: /status, /set, /config, /sweep endpoints
- Web UI with PCB green theme, slider, presets, pin visualization
- NVS persistence of attenuation setting across power cycles
- Sweep mode for automated attenuation stepping
- mDNS (attenuator.local), OTA updates, watchdog
 2026-02-02 21:24:29 -07:00
Ryan Malloy
bd49570ea0 Track CLAUDE.md with local resource inventory 2026-02-02 13:43:02 -07:00
Ryan Malloy
713c2821f2 Add SVG vector extractions from datasheet 
16 SVGs: full-page renders and isolated drawings for each
of the 8 datasheet pages.
 2026-02-02 13:42:21 -07:00
Ryan Malloy
a5560470ea Initial commit: HMC472A attenuator module reference materials 
Datasheet extraction, module specs, marketing photos, and
project CLAUDE.md with local resource inventory.
 2026-02-02 13:41:13 -07:00