Ryan Malloy
613611d37a
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
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
#pragma once
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#include <Arduino.h>
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// --- Firmware Version ---
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#define FW_VERSION "2026-02-02"
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#define FW_HOSTNAME "attenuator"
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// --- WiFi Credentials ---
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// Override via build_flags or edit directly
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#ifndef WIFI_SSID
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#define WIFI_SSID "your-ssid"
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#endif
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#ifndef WIFI_PASS
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#define WIFI_PASS "your-password"
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#endif
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#define WIFI_TIMEOUT_MS 15000
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// --- HMC472A Control Pins (active-low) ---
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// GPIOs 1-6: contiguous block in lower 32-bit register
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// Enables glitch-free simultaneous writes via GPIO.out_w1ts/w1tc
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static constexpr uint8_t PIN_V1 = 1; // 16 dB (MSB)
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static constexpr uint8_t PIN_V2 = 2; // 8 dB
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static constexpr uint8_t PIN_V3 = 3; // 4 dB
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static constexpr uint8_t PIN_V4 = 4; // 2 dB
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static constexpr uint8_t PIN_V5 = 5; // 1 dB
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static constexpr uint8_t PIN_V6 = 6; // 0.5 dB (LSB)
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static constexpr uint8_t ATTEN_PINS[6] = {PIN_V1, PIN_V2, PIN_V3, PIN_V4, PIN_V5, PIN_V6};
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static constexpr float ATTEN_DB[6] = {16.0f, 8.0f, 4.0f, 2.0f, 1.0f, 0.5f};
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// Bitmask covering all 6 control pins in the GPIO register
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static constexpr uint32_t ATTEN_PIN_MASK = (1 << PIN_V1) | (1 << PIN_V2) | (1 << PIN_V3) |
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(1 << PIN_V4) | (1 << PIN_V5) | (1 << PIN_V6);
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// --- Status LED ---
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static constexpr uint8_t PIN_LED = 15; // Built-in LED, active HIGH
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// --- Attenuator Limits ---
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static constexpr float DB_MIN = 0.0f;
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static constexpr float DB_MAX = 31.5f;
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static constexpr float DB_STEP = 0.5f;
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static constexpr uint8_t STEP_MIN = 0;
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static constexpr uint8_t STEP_MAX = 63;
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// --- Sweep Defaults ---
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static constexpr uint32_t SWEEP_DWELL_MS_DEFAULT = 500;
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static constexpr uint32_t SWEEP_DWELL_MS_MIN = 10;
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static constexpr uint32_t SWEEP_DWELL_MS_MAX = 10000;
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// --- NVS ---
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#define NVS_NAMESPACE "atten"
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#define NVS_KEY_STEP "step"
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// --- Watchdog ---
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#define WDT_TIMEOUT_S 120
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// --- Web Server ---
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#define WEB_PORT 80
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