- Use Fmuv3 Firmware: 2m Flash

// Flash monitoring typedef struct flash_status_s { uint32_t total_bytes; uint32_t free_bytes; uint32_t used_bytes; uint8_t percent_used; uint16_t estimated_log_seconds; } flash_status_t;

// Feature flag for FMUV3 target #if defined(USE_ADAPTIVE_BLACKBOX) && defined(FLASH_M25P16) #define USE_ADAPTIVE_BLACKBOX_FEATURE #endif Add to src/main/target/MATEKF405/target.h :

// Dynamic rate adjustment based on remaining space static uint8_t calculate_dynamic_rate(void) { if(!adaptive_bb_config.dynamic_rate) return 1;

// Check if flash is 2MB (typical FMUV3 boards) if(flash_status.total_bytes == 2 * 1024 * 1024) { // Configure for 2M flash blackboxConfig()->rate_num = 1; blackboxConfig()->rate_denom = 1; // Auto-admit settings if(flash_status.percent_used > 90) { smart_erase_oldest(); } // Set max log size uint16_t max_seconds = adaptive_bb_config.max_log_seconds; if(max_seconds > 0) { uint32_t max_bytes = max_seconds * 2000; // 2KB/sec estimate if(max_bytes < flash_status.free_bytes) { blackboxConfig()->max_log_size_kb = max_bytes / 1024; } } // Apply dynamic rate uint8_t dyn_rate = calculate_dynamic_rate(); if(dyn_rate == 0) { blackboxConfig()->rate_num = 1; blackboxConfig()->rate_denom = 2; // 500Hz } else if(dyn_rate == 1) { blackboxConfig()->rate_num = 1; blackboxConfig()->rate_denom = 1; // 1kHz } else { blackboxConfig()->rate_num = 2; blackboxConfig()->rate_denom = 1; // 2kHz } } 2m flash - use fmuv3 firmware

// Find oldest log (simplified - would need blackbox log iterator) uint32_t oldest_log_address = 0; uint32_t oldest_log_size = 0;

blackbox_log_header *log = blackbox_get_log(0); if(log) { blackbox_erase_log(log); } }

// Rate calculation: 1kHz = ~2KB/sec (gyro+accel+debug) switch(adaptive_bb_config.resolution) { case 0: // Low (500Hz gyro, no accel) bytes_per_second = 800; break; case 1: // Normal (1kHz gyro, 1kHz accel) bytes_per_second = 2000; break; case 2: // High (2kHz gyro, 1kHz accel, debug) bytes_per_second = 4000; break; default: bytes_per_second = 2000; } // Flash monitoring typedef struct flash_status_s { uint32_t

return flash_status.free_bytes / bytes_per_second; }

if(percent < 30) return 2; // High rate if(percent < 60) return 1; // Normal rate if(percent < 85) return 0; // Low rate return 0; // Minimal rate when almost full }

// CLI command handler void adaptive_blackbox_cli(char *cmdline) { char *arg = strtok(cmdline, " "); rate_num = 1

// Implementation would scan flash for log headers // For brevity: erase first 512KB (oldest quarter) flash_erase_sector(0, 512 * 1024);

// Main feature: auto-configure blackbox on boot void adaptive_blackbox_init(void) { // Get flash geometry flash_status.total_bytes = flash_getSize(); flash_status.free_bytes = flash_getFreeSpace(); flash_status.used_bytes = flash_status.total_bytes - flash_status.free_bytes; flash_status.percent_used = (flash_status.used_bytes * 100) / flash_status.total_bytes;

I'll help you create a feature for an using FMUV3 firmware (Betaflight target: MATEKF405 or similar F4 with 2MB flash). This feature will be a Blackbox logging manager with adaptive recording that optimizes flash storage. Feature: Adaptive Blackbox Manager for 2M Flash // File: src/main/drivers/adaptive_blackbox.c // Feature: Auto-manages 2MB flash with intelligent recording #include <stdbool.h> #include <stdint.h> #include "platform.h" #include "drivers/flash.h" #include "drivers/flash_m25p16.h" #include "drivers/time.h" #include "build/build_config.h"