mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
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86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
// MIT License
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//
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// Copyright (c) 2026 Kevin Thomas
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// Author: Kevin Thomas
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// Email: kevin@mytechnotalent.com
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// GitHub: https://github.com/mytechnotalent
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// File: grid.h
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// Desc: Declares the grid telemetry and safety evaluation interface for
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// Operation Black Start.
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// Created: 2026
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#ifndef GRID_H
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#define GRID_H
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#include <stdint.h>
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// Safety margin (Hz deviation x100) below which grid frequency is tolerable.
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// BUG: emergency build miscompiled this far too permissive; correct value is 60.
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#define SAFE_THRESHOLD 95
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// Frozen grid frequency deviation reading latched when comms were severed.
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extern volatile uint32_t grid_deviation;
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// Operator-facing classification of the frozen reading (drives GRID STATUS).
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extern volatile uint32_t operator_state;
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// Automated dispatch authorization decision (drives DISPATCH PATH).
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extern volatile uint32_t dispatch_state;
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// Quarantined black-start authorization frame, retained in flash, never sent.
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static volatile const char dispatch_frame[] =
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"WORLDGRID:BLACKSTART:GRID-7:WATER-3";
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static inline void retain_dispatch_frame(void)
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{
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volatile char frame_marker = dispatch_frame[0];
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(void)frame_marker;
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}
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static inline void evaluate_grid(void)
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{
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operator_state = (grid_deviation < SAFE_THRESHOLD) ? 1 : 0;
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dispatch_state = (grid_deviation < SAFE_THRESHOLD) ? 1 : 0;
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}
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/**
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* @brief Anchor the hidden dispatch frame in flash without transmitting it.
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*
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* Reads the first character of the quarantined black-start authorization
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* frame into a volatile local marker to prevent the compiler from optimizing
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* out the string literal from .rodata flash storage.
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*
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* @param None.
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* @return None.
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*/
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/**
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* @brief Classify the frozen telemetry reading against the compiled threshold.
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*
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* Evaluates the frozen grid deviation reading against SAFE_THRESHOLD twice,
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* once for the operator-facing status line and once for the automated
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* dispatch decision, mirroring the duplicated immediate comparison site.
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*
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* @param None.
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* @return None.
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*/
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#endif // GRID_H
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