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+#ifndef ucoolib_dev_avrisp_avrisp_frame_hh
+#define ucoolib_dev_avrisp_avrisp_frame_hh
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2013 Nicolas Schodet
+//
+// APBTeam:
+// Web: http://apbteam.org/
+// Email: team AT apbteam DOT org
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+// }}}
+#include "avrisp_proto.hh"
+
+#include "ucoolib/intf/stream.hh"
+
+#include "config/dev/avrisp.hh"
+
+namespace ucoo {
+
+/// State of frame decoding.
+enum AvrIspFrameState
+{
+ /// Start state, nothing decoded.
+ AVRISP_FRAME_STATE_START,
+ /// After message started, waiting sequence number.
+ AVRISP_FRAME_STATE_WAIT_SEQ,
+ /// Waiting first length byte.
+ AVRISP_FRAME_STATE_WAIT_LEN_MSB,
+ /// Waiting second length byte.
+ AVRISP_FRAME_STATE_WAIT_LEN_LSB,
+ /// Waiting token.
+ AVRISP_FRAME_STATE_WAIT_TOKEN,
+ /// Reading data.
+ AVRISP_FRAME_STATE_DATA,
+ /// Waiting checksum.
+ AVRISP_FRAME_STATE_WAIT_CKSUM,
+};
+
+/// Transfer data between a Stream and AvrIspProto which works frame by frame.
+class AvrIspFrame
+{
+ public:
+ /// Constructor.
+ AvrIspFrame (AvrIspProto &proto);
+ /// Read & write from stream. If operation on stream blocks, this will
+ /// block too.
+ void read_and_write (Stream &stream);
+ private:
+ /// Handle received char.
+ void accept_char (uint8_t c);
+ /// Send frame in buffer (actually just setup, work is done in
+ /// read_and_write()).
+ void send_frame (int len);
+ /// Process found received frame.
+ void process ();
+ private:
+ /// Frame based ISP protocol handler.
+ AvrIspProto &proto_;
+ /// Current state.
+ AvrIspFrameState state_;
+ /// Message sequence number.
+ uint8_t seq_;
+ /// Message length.
+ int len_;
+ /// Checksum current value.
+ uint8_t cksum_;
+ /// Buffer to store frame until validated.
+ uint8_t buffer_[UCOO_CONFIG_DEV_AVRISP_FRAME_BUFFER_SIZE];
+ /// Used buffer length.
+ int buffer_len_;
+ /// Index to first byte to send from buffer, or -1 if not sending.
+ int buffer_send_index_;
+ /// Size of the frame header.
+ static const uint8_t proto_head_ = 5;
+ /// Size of the frame tail.
+ static const uint8_t proto_tail_ = 1;
+};
+
+} // namespace ucoo
+
+#endif // ucoolib_dev_avrisp_avrisp_frame_hh