79612197a1
Manual-trigger firmware toolkit for pentesting owned devices: - Pin Scan: UART/JTAG/SWD detection (baud est + IDCODE reads) - V-Sense: target voltage probe w/ logic-family guess - UART Sniff: passive capture + manual-only frame replay - USB Enum: ESP32-S3 host, read-only descriptor fingerprinting - DefCred: single-host factory-default login check, rate-limited Modular shell (core/ + modules/), PlatformIO build, hardware/safety docs. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01AAhMHMRAQLQ9hSbBECKNfn
63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
#include "../core/module.h"
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#include "../core/ui.h"
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#include "../core/pins.h"
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// Voltage sensing. Reads the ADC behind an external divider and reports
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// a live voltage plus a guess at the logic family, so you know what
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// you're probing BEFORE you drive a pin into it. Min/max are held so a
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// brief transient (e.g. a bus idling high) is captured.
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//
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// The ESP32-S3 ADC is non-linear near the rails; we use the Arduino
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// analogReadMilliVolts() calibration path and apply the divider ratio.
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class VSense : public Module {
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float v = 0, vmin = 99, vmax = 0;
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uint32_t lastMs = 0;
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public:
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const char* name() const override { return "V-Sense"; }
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const char* blurb() const override { return "target voltage probe"; }
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void onEnter() override {
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analogReadResolution(12);
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pinMode(pins::VSENSE_ADC, INPUT);
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vmin = 99; vmax = 0;
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}
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bool onKey(char c) override {
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if (c == 'r') { vmin = 99; vmax = 0; return true; } // reset hold
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return false;
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}
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void tick() override {
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if (millis() - lastMs < 100) return;
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lastMs = millis();
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uint32_t mv = analogReadMilliVolts(pins::VSENSE_ADC);
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v = (mv / 1000.0f) * pins::VSENSE_RATIO;
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if (v < vmin) vmin = v;
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if (v > vmax) vmax = v;
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}
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void draw() override {
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ui::lineC(0, ui::accent(), "Vin = %5.2f V", v);
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ui::line(1, "min %4.2f max %4.2f (ratio %.1f)", vmin, vmax, pins::VSENSE_RATIO);
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ui::lineC(3, family(v).color, "logic: %s", family(v).name);
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ui::line(5, "wire target -> divider -> G%d", pins::VSENSE_ADC);
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ui::hintBar("[r]eset hold [`]back");
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}
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private:
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struct Fam { const char* name; uint16_t color; };
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Fam family(float x) {
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if (x < 0.3f) return {"floating / GND", ui::fg()};
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if (x < 1.5f) return {"1.2V core rail", ui::warn()};
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if (x < 2.1f) return {"1.8V logic", ui::warn()};
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if (x < 3.0f) return {"2.5V logic", ui::warn()};
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if (x < 3.9f) return {"3.3V logic OK", ui::accent()};
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if (x < 6.0f) return {"5V ! shift req", ui::bad()};
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return {"HIGH >6V DANGER", ui::bad()};
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}
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};
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Module* makeVSense() { return new VSense(); }
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