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fix: main.cpp — static frame buffer, mutex for cv state, NTP init guard

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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Peter Woolery
2026-04-14 06:59:09 -07:00
parent 49da51bc05
commit 121f7a0a0a
1 changed files with 29 additions and 10 deletions
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39
firmware/src/main.cpp
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@@ -18,8 +18,9 @@
#define CAM_INTERVAL_MS (1000 / CAM_FPS)
#define REPORT_INTERVAL_S 3600
static DeviceConfig g_cfg;
static CVState g_cv;
static DeviceConfig g_cfg;
static CVState g_cv;
static SemaphoreHandle_t s_cv_mutex = nullptr;
// LED: simple on/off — blink patterns can be added later
static void led_set(bool on) { digitalWrite(LED_PIN, on ? HIGH : LOW); }
@@ -38,10 +39,13 @@ static void check_factory_reset() {
// Camera + CV task — runs on core 1 at 5 fps
static void task_camera(void*) {
uint8_t frame[CV_PIXELS];
static uint8_t frame[CV_PIXELS]; // static: avoids 9KB on task stack
while (true) {
if (camera_capture_96(frame)) {
cv_process(g_cv, frame, g_cfg.line_offset);
if (xSemaphoreTake(s_cv_mutex, pdMS_TO_TICKS(100)) == pdTRUE) {
cv_process(g_cv, frame, g_cfg.line_offset);
xSemaphoreGive(s_cv_mutex);
}
}
vTaskDelay(pdMS_TO_TICKS(CAM_INTERVAL_MS));
}
@@ -49,13 +53,18 @@ static void task_camera(void*) {
// Hourly reporter task — runs on core 0
static void task_reporter(void*) {
uint32_t last_report_ts = (uint32_t)(time(nullptr));
uint32_t last_report_ts = 0; // 0 = not initialized yet
while (true) {
vTaskDelay(pdMS_TO_TICKS(10000)); // check every 10s
uint32_t now = (uint32_t)(time(nullptr));
// Skip if NTP not synced or hour not elapsed
if (now < 1700000000UL || (now - last_report_ts) < REPORT_INTERVAL_S) continue;
if (now < 1700000000UL) continue; // NTP not synced
// First valid timestamp — initialize without reporting
if (last_report_ts == 0) { last_report_ts = now; continue; }
if ((now - last_report_ts) < REPORT_INTERVAL_S) continue;
uint32_t period_start = last_report_ts;
uint32_t period_end = now;
@@ -65,9 +74,17 @@ static void task_reporter(void*) {
ble_scanner_pause();
led_set(true); // yellow indicator (single LED: on = uploading)
CameraHourlyRecord cam_rec = {period_start, period_end,
g_cv.entries, g_cv.exits};
cv_reset_counts(g_cv);
CameraHourlyRecord cam_rec;
if (xSemaphoreTake(s_cv_mutex, pdMS_TO_TICKS(500)) == pdTRUE) {
cam_rec = {period_start, period_end, g_cv.entries, g_cv.exits};
cv_reset_counts(g_cv);
xSemaphoreGive(s_cv_mutex);
} else {
// Failed to acquire — skip this cycle, will report next hour
ble_scanner_resume();
led_set(false);
continue;
}
BLEHourlyRecord ble_rec = ble_scanner_collect(period_start, period_end);
@@ -124,6 +141,8 @@ void setup() {
ble_scanner_start();
s_cv_mutex = xSemaphoreCreateMutex();
xTaskCreatePinnedToCore(task_camera, "cam", 4096, nullptr, 2, nullptr, 1);
xTaskCreatePinnedToCore(task_reporter, "rep", 8192, nullptr, 1, nullptr, 0);
}