/* list available log numbers */ void DataFlash_File::ListAvailableLogs(AP_HAL::BetterStream *port) { uint16_t num_logs = get_num_logs(); int16_t last_log_num = find_last_log(); if (num_logs == 0) { port->printf_P(PSTR("\nNo logs\n\n")); return; } port->printf_P(PSTR("\n%u logs\n"), (unsigned)num_logs); for (uint16_t i=num_logs; i>=1; i--) { uint16_t log_num = last_log_num - i + 1; off_t size; char *filename = _log_file_name(log_num); if (filename != NULL) { size = _get_log_size(log_num); if (size != 0) { struct stat st; if (stat(filename, &st) == 0) { struct tm *tm = gmtime(&st.st_mtime); port->printf_P(PSTR("Log %u in %s of size %u %u/%u/%u %u:%u\n"), (unsigned)log_num, filename, (unsigned)size, (unsigned)tm->tm_year+1900, (unsigned)tm->tm_mon+1, (unsigned)tm->tm_mday, (unsigned)tm->tm_hour, (unsigned)tm->tm_min); } } free(filename); } } port->println(); }
/* start writing to a new log file */ uint16_t DataFlash_File::start_new_log(void) { stop_logging(); if (_read_fd != -1) { ::close(_read_fd); _read_fd = -1; } uint16_t log_num = find_last_log(); // re-use empty logs if possible if (_get_log_size(log_num) > 0 || log_num == 0) { log_num++; } if (log_num > MAX_LOG_FILES) { log_num = 1; } char *fname = _log_file_name(log_num); _write_fd = ::open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666); free(fname); if (_write_fd == -1) { _initialised = false; return 0xFFFF; } _write_offset = 0; _writebuf_head = 0; _writebuf_tail = 0; log_write_started = true; // now update lastlog.txt with the new log number fname = _lastlog_file_name(); FILE *f = ::fopen(fname, "w"); fprintf(f, "%u\r\n", (unsigned)log_num); fclose(f); free(fname); return log_num; }
// This function starts a new log file in the DataFlash uint16_t DataFlash_Block::start_new_log(void) { uint16_t last_page = find_last_page(); StartRead(last_page); //Serial.print("last page: "); Serial.println(last_page); //Serial.print("file #: "); Serial.println(GetFileNumber()); //Serial.print("file page: "); Serial.println(GetFilePage()); if(find_last_log() == 0 || GetFileNumber() == 0xFFFF) { SetFileNumber(1); StartWrite(1); //Serial.println("start log from 0"); log_write_started = true; return 1; } uint16_t new_log_num; // Check for log of length 1 page and suppress if(GetFilePage() <= 1) { new_log_num = GetFileNumber(); // Last log too short, reuse its number // and overwrite it SetFileNumber(new_log_num); StartWrite(last_page); } else { new_log_num = GetFileNumber()+1; if (last_page == 0xFFFF) { last_page=0; } SetFileNumber(new_log_num); StartWrite(last_page + 1); } log_write_started = true; return new_log_num; }