Course update: lessons, CTF 0x0011a_cb, and documentation

- 0x0011a_cb (Operation Dark Vector): nation-state CTF redesign with an
  AES-128-ECB sealed target and a plaintext launch origin; RP2350 firmware with
  bearing-driven servo, tri-color LEDs, GSV stats, and a realistic no-fix path
- docs: story-driven classified brief, GDB and Ghidra tutorials with deep
  step-throughs, regenerated artifacts and PDFs
- scripts: docstring standard, AES per-student randomizer, telemetry monitor
- week 3 to week 5 lessons: Ghidra patching tutorial, CMSIS-SVD hardware RE,
  double floating-point and GPIO architecture chapters, README structure

0x0011a_cb/src/payload.c

@@ -0,0 +1,58 @@
+// MIT License
+//
+// Copyright (c) 2026 Kevin Thomas
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// Author:  Kevin Thomas
+// Email:   kevin@mytechnotalent.com
+// GitHub:  https://github.com/mytechnotalent
+// File:    payload.c
+// Desc:    Implements payload release solenoid latch control on GPIO16.
+// Created: 2026
+
+#include "payload.h"
+#include "lora.h"
+#include "hardware/gpio.h"
+#include <stdio.h>
+
+void init_payload(void)
+{
+    gpio_init(16); gpio_set_dir(16, GPIO_OUT); gpio_put(16, 1);
+    gpio_init(17); gpio_set_dir(17, GPIO_OUT); gpio_put(17, 0);
+    gpio_init(18); gpio_set_dir(18, GPIO_OUT); gpio_put(18, 0);
+    gpio_init(25); gpio_set_dir(25, GPIO_OUT); gpio_put(25, 0);
+}
+
+void set_gnss_leds(bool fix, int siv)
+{
+    gpio_put(16, (!fix && (siv == 0)) ? 1 : 0);
+    gpio_put(17, fix ? 1 : 0);
+    gpio_put(18, (!fix && (siv > 0)) ? 1 : 0);
+}
+
+void release_payload(void)
+{
+    gpio_put(16, 1);
+    gpio_put(17, 1);
+    gpio_put(18, 1);
+    printf("PAYLOAD RELEASED AT TARGET COORDINATES\r\n");
+    lora_send("PAYLOAD RELEASED AT TARGET COORDINATES\r\n");
+}
+