public boolean createDir(String name) throws IOException { SystemFormatter sf = new SystemFormatter(SystemCommand.Command.CREATE_DIR, SystemCommand.REPLY); sf.addString(name); byte[] req = sf.toByteArray(); connector.write(req, 0); byte[] resp = connector.read(0, 0); return resp[6] == SystemCommand.SUCCESS; }
/** * @param fileName ev3 full filename * @param timeout timeout in msec * @param part strongly recommended set about 1000 bytes * @return byte[] byte of file * @throws IOException */ public byte[] getFile(String fileName, int timeout, int part) throws IOException { SystemFormatter sf = new SystemFormatter(SystemCommand.Command.BEGIN_GETFILE, SystemCommand.REPLY); short chunk = 1000; // SystemCommand.MAX_FILE_CHUNK if (part > 0 && part <= SystemCommand.MAX_FILE_CHUNK) { chunk = (short) part; } sf.addSize(chunk); sf.addString(fileName); byte[] bytecode = sf.toByteArray(); connector.write(bytecode, timeout); bytecode = connector.read(0, 0); if (bytecode[6] != SystemCommand.SUCCESS && bytecode[6] != SystemCommand.END_OF_FILE) { throw new IOException("Could not begin upload file: " + bytecode[6]); } int totalSize = ((bytecode[10] & 0xFF) << 24) + ((bytecode[9] & 0xFF) << 16) + ((bytecode[8] & 0xFF) << 8) + (bytecode[7] & 0xFF); byte handler = bytecode[11]; byte[] bfile = new byte[totalSize]; int sizeRead = bytecode.length - 12; chunk = (short) sizeRead; System.arraycopy(bytecode, 12, bfile, 0, sizeRead); while (sizeRead < totalSize) { sf = new SystemFormatter(SystemCommand.Command.CONTINUE_GETFILE, SystemCommand.REPLY); sf.addByteCode(handler); int newRead = Math.min(chunk, totalSize - sizeRead); sf.addSize(newRead); bytecode = sf.toByteArray(); connector.write(bytecode, timeout); bytecode = connector.read(0, 0); if (bytecode[6] != SystemCommand.SUCCESS && bytecode[6] != SystemCommand.END_OF_FILE) { throw new IOException("Error CONTINUE_UPLOAD: " + bytecode[6]); } handler = bytecode[11]; newRead = bytecode.length - 12; System.arraycopy(bytecode, 12, bfile, sizeRead, newRead); sizeRead += newRead; } return bfile; }
/** * See lego ev3 firmware developer kit, Folder structure within firmware, page 102; * * <p>See lego ev3 communication developer kit, Downloading data to the EV3 programmable brick, * page 7; * * @param data byte[] body of local file * @param outputFileName brick full filename e.g. "../prjs/SD_Card/test/1.jpg" * @param timeout between each iteration of transmission, msec * @param part portion of bytes in each iteration of transmission. default 10000, must be between * 1 and SystemCommand.MAX_FILE_CHUNK * @param sh sh is handler which counts progress in transmission, may be null * @throws IOException */ public void sendFile(byte[] data, String outputFileName, int timeout, int part, ProcessHandler sh) throws IOException { int fileSize = data.length; if (sh != null) { sh.setTotal(fileSize); } int chunk = 10000; // SystemCommand.MAX_FILE_CHUNK if (part > 0 && part <= SystemCommand.MAX_FILE_CHUNK) { chunk = part; } SystemFormatter sf = new SystemFormatter(SystemCommand.Command.BEGIN_DOWNLOAD, SystemCommand.REPLY); sf.addSize(fileSize); sf.addString(outputFileName); byte[] bytecode = sf.toByteArray(); connector.write(bytecode, timeout); bytecode = connector.read(0, 0); if (bytecode[6] != SystemCommand.SUCCESS) { throw new IOException("Could not begin file save: " + bytecode[6]); } byte handler = bytecode[7]; int sizeSent = 0; while (sizeSent < data.length) { sf = new SystemFormatter(SystemCommand.Command.CONTINUE_DOWNLOAD, SystemCommand.REPLY); sf.addByteCode(handler); int sizeToSend = Math.min(chunk, data.length - sizeSent); sf.addBytes(data, sizeSent, sizeToSend); bytecode = sf.toByteArray(); connector.write(bytecode, timeout); bytecode = connector.read(0, 0); handler = bytecode[7]; sizeSent += sizeToSend; if (sh != null) { sh.setCurrent(sizeSent); } if (bytecode[6] != SystemCommand.SUCCESS && bytecode[6] != SystemCommand.END_OF_FILE) { throw new IOException("Error saving file: " + bytecode[6]); } } }
/** * @param path * @param timeout * @return The new line delimited list is formatted as: * <p>If it is a file: 32 chars (hex) of MD5SUM + space + 8 chars (hex) of filesize + space + * filename + new line * <p>If it is a folder: foldername + / + new line * @throws IOException */ public String readFolder(String path, int timeout) throws IOException { SystemFormatter sf = new SystemFormatter(SystemCommand.Command.LIST_FILES, SystemCommand.REPLY); short chunk = 100; sf.addSize(chunk); sf.addString(path); byte[] data = sf.toByteArray(); connector.write(data, timeout); data = connector.read(0, 0); if (data[6] != SystemCommand.SUCCESS && data[6] != SystemCommand.END_OF_FILE) { throw new IOException("Could not begin fileList read: " + data[6]); } int totalSize = ((data[10] & 0xFF) << 24) + ((data[9] & 0xFF) << 16) + ((data[8] & 0xFF) << 8) + (data[7] & 0xFF); byte handler = data[11]; byte[] bstring = new byte[totalSize]; int sizeRead = Math.min(chunk, totalSize); System.arraycopy(data, 12, bstring, 0, sizeRead); while (sizeRead < totalSize) { sf = new SystemFormatter(SystemCommand.Command.CONTINUE_LIST_FILES, SystemCommand.REPLY); sf.addByteCode(handler); int newRead = Math.min(chunk, totalSize - sizeRead); sf.addSize(newRead); data = sf.toByteArray(); connector.write(data, timeout); data = connector.read(0, 0); if (data[6] != SystemCommand.SUCCESS && data[6] != SystemCommand.END_OF_FILE) { throw new IOException("Error reading fileList: " + data[6]); } handler = data[7]; System.arraycopy(data, 8, bstring, sizeRead, newRead); sizeRead += newRead; } String str = new String(bstring, "UTF-8"); return str; }