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authorNicolas Schodet2015-06-03 13:46:44 +0200
committerNicolas Schodet2019-10-07 00:44:44 +0200
commit574480980dcffbfa7cd6dbe71e88253eb4c9feba (patch)
tree5f1c1261341a7c2a56de01d8c6d0815b164be8ba /ucoo/dev/avrisp/avrisp_frame.hh
parentd415a0646e874848cd06482c5d57916cca5cff4a (diff)
Rename ucoolib modules directory from ucoolib to ucoo
Diffstat (limited to 'ucoo/dev/avrisp/avrisp_frame.hh')
-rw-r--r--ucoo/dev/avrisp/avrisp_frame.hh95
1 files changed, 95 insertions, 0 deletions
diff --git a/ucoo/dev/avrisp/avrisp_frame.hh b/ucoo/dev/avrisp/avrisp_frame.hh
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+#ifndef ucoo_dev_avrisp_avrisp_frame_hh
+#define ucoo_dev_avrisp_avrisp_frame_hh
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2013 Nicolas Schodet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+// }}}
+#include "avrisp_proto.hh"
+
+#include "ucoo/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 // ucoo_dev_avrisp_avrisp_frame_hh