/* DataFlash logging - MAVLink variant - transfers blocks of the open log file to a client using MAVLink */ #pragma once #define DATAFLASH_MAVLINK_SUPPORT 1 #if DATAFLASH_MAVLINK_SUPPORT #include #include "DataFlash_Backend.h" extern const AP_HAL::HAL& hal; #define DF_MAVLINK_DISABLE_INTERRUPTS 0 class DataFlash_MAVLink : public DataFlash_Backend { public: // constructor DataFlash_MAVLink(DataFlash_Class &front, DFMessageWriter_DFLogStart *writer) : DataFlash_Backend(front, writer), _max_blocks_per_send_blocks(8), _blockcount(32) // this may get reduced in Init if allocation fails ,_perf_packing(hal.util->perf_alloc(AP_HAL::Util::PC_ELAPSED, "DM_packing")) { } // initialisation void Init() override; bool logging_started() const override { return _logging_started; } void stop_logging() override; /* Write a block of data at current offset */ bool WritePrioritisedBlock(const void *pBuffer, uint16_t size, bool is_critical) override; // initialisation bool CardInserted(void) override { return true; } // erase handling void EraseAll() override {} bool NeedPrep() override { return false; } void Prep() override { } // high level interface uint16_t find_last_log(void) override { return 0; } void get_log_boundaries(uint16_t log_num, uint16_t & start_page, uint16_t & end_page) override {} void get_log_info(uint16_t log_num, uint32_t &size, uint32_t &time_utc) override {} int16_t get_log_data(uint16_t log_num, uint16_t page, uint32_t offset, uint16_t len, uint8_t *data) override { return 0; } uint16_t get_num_logs(void) override { return 0; } void LogReadProcess(uint16_t log_num, uint16_t start_page, uint16_t end_page, print_mode_fn printMode, AP_HAL::BetterStream *port) override {} void DumpPageInfo(AP_HAL::BetterStream *port) override {} void ShowDeviceInfo(AP_HAL::BetterStream *port) override {} void ListAvailableLogs(AP_HAL::BetterStream *port) override {} void push_log_blocks() override; void remote_log_block_status_msg(mavlink_channel_t chan, mavlink_message_t* msg) override; private: struct dm_block { uint32_t seqno; uint8_t buf[MAVLINK_MSG_REMOTE_LOG_DATA_BLOCK_FIELD_DATA_LEN]; uint32_t last_sent; struct dm_block *next; }; bool send_log_block(struct dm_block &block); void handle_ack(mavlink_channel_t chan, mavlink_message_t* msg, uint32_t seqno); void handle_retry(uint32_t block_num); void do_resends(uint32_t now); void free_all_blocks(); // a stack for free blocks, queues for pending, sent, retries and sent struct dm_block_queue { uint32_t sent_count; struct dm_block *oldest; struct dm_block *youngest; }; typedef struct dm_block_queue dm_block_queue_t ; void enqueue_block(dm_block_queue_t &queue, struct dm_block *block); bool queue_has_block(dm_block_queue_t &queue, struct dm_block *block); struct dm_block *dequeue_seqno(dm_block_queue_t &queue, uint32_t seqno); bool free_seqno_from_queue(uint32_t seqno, dm_block_queue_t &queue); bool send_log_blocks_from_queue(dm_block_queue_t &queue); uint8_t stack_size(struct dm_block *stack); uint8_t queue_size(dm_block_queue_t queue); struct dm_block *_blocks_free; dm_block_queue_t _blocks_sent; dm_block_queue_t _blocks_pending; dm_block_queue_t _blocks_retry; struct _stats { // the following are reset any time we log stats (see "reset_stats") uint32_t resends; uint8_t collection_count; uint16_t state_free; // cumulative across collection period uint8_t state_free_min; uint8_t state_free_max; uint16_t state_pending; // cumulative across collection period uint8_t state_pending_min; uint8_t state_pending_max; uint16_t state_retry; // cumulative across collection period uint8_t state_retry_min; uint8_t state_retry_max; uint16_t state_sent; // cumulative across collection period uint8_t state_sent_min; uint8_t state_sent_max; } stats; // this method is used when reporting system status over mavlink bool logging_enabled() const override { return true; } bool logging_failed() const override; mavlink_channel_t _chan; uint8_t _target_system_id; uint8_t _target_component_id; bool _initialised; // this controls the maximum number of blocks we will push from // the pending and send queues in any call to push_log_blocks. // push_log_blocks is called by periodic_tasks. Each block is 200 // bytes. In Plane, at 50Hz, a _max_blocks_per_send_blocks of 2 // means we will push at most 2*50*200 == 20KB of logs per second // _max_blocks_per_send_blocks has to be high enough to push all // of the logs, but low enough that we don't spend way too much // time packing messages in any one loop const uint8_t _max_blocks_per_send_blocks; uint32_t _next_seq_num; uint16_t _latest_block_len; bool _logging_started; uint32_t _last_response_time; uint32_t _last_send_time; uint8_t _next_block_number_to_resend; bool _sending_to_client; void Log_Write_DF_MAV(DataFlash_MAVLink &df); void internal_error(); uint32_t bufferspace_available() override; // in bytes uint8_t remaining_space_in_current_block(); // write buffer uint8_t _blockcount_free; uint8_t _blockcount; struct dm_block *_blocks; struct dm_block *_current_block; struct dm_block *next_block(); void periodic_10Hz(uint32_t now) override; void periodic_1Hz(uint32_t now) override; void periodic_fullrate(uint32_t now) override; void stats_init(); void stats_reset(); void stats_collect(); void stats_log(); uint32_t _stats_last_collected_time; uint32_t _stats_last_logged_time; uint8_t mavlink_seq; /* we currently ignore requests to start a new log. Notionally we * could close the currently logging session and hope the client * re-opens one */ uint16_t start_new_log(void) override { return 0; } bool ReadBlock(void *pkt, uint16_t size) override { return false; } // performance counters AP_HAL::Util::perf_counter_t _perf_errors; AP_HAL::Util::perf_counter_t _perf_packing; AP_HAL::Util::perf_counter_t _perf_overruns; AP_HAL::Semaphore *semaphore; }; #endif // DATAFLASH_MAVLINK_SUPPORT