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@@ -1,153 +0,0 @@
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// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: t -*-
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//
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// DIYDrones Custom Mediatek GPS driver for ArduPilot and ArduPilotMega.
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// Code by Michael Smith, Jordi Munoz and Jose Julio, DIYDrones.com
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//
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// This library is free software; you can redistribute it and / or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// GPS configuration : Custom protocol per "DIYDrones Custom Binary Sentence Specification V1.1"
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//
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#include "GCS_SIMPLE.h" |
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#include <stdint.h> |
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// Public Methods //////////////////////////////////////////////////////////////
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GCS_SIMPLE::GCS_SIMPLE(Stream *s) : _port(s) |
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{ |
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} |
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// Process bytes available from the stream
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//
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// The stream is assumed to contain only our custom message. If it
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// contains other messages, and those messages contain the preamble bytes,
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// it is possible for this code to become de-synchronised. Without
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// buffering the entire message and re-processing it from the top,
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// this is unavoidable.
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//
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// The lack of a standard header length field makes it impossible to skip
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// unrecognised messages.
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//
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void |
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GCS_SIMPLE::ack(void) |
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{ |
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buff_pointer = 0; |
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flush(1); |
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} |
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bool |
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GCS_SIMPLE::read(void) |
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{ |
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uint8_t data; |
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int numc; |
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bool parsed = false; |
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numc = _port->available(); |
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for (int i = 0; i < numc; i++){ |
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// Process bytes received
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// read the next byte
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data = _port->read(); |
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//_port->write(data);
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restart: |
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switch(_step){ |
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case 0: |
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if(52 == data){ |
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_step++; |
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_payload_counter = 0; |
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} |
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break; |
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case 1: |
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if (68 == data) { |
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_step++; |
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break; |
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} |
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_step = 0; |
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goto restart; |
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case 2: |
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_length = data; |
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_step++; |
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break; |
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case 3: |
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_id = data; |
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_step++; |
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break; |
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case 4: |
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_buffer.bytes[_payload_counter++] = data; |
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if (_payload_counter == sizeof(_buffer)){ |
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_step = 0; |
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parsed = true; |
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} |
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index = _buffer.msg.index; |
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id = _buffer.msg.id; |
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p1 = _buffer.msg.p1; |
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altitude = _buffer.msg.altitude; |
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latitude = _buffer.msg.latitude; |
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longitude = _buffer.msg.longitude; |
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break; |
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} |
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} |
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return parsed; |
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} |
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// Add binary values to the buffer
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void |
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GCS_SIMPLE::write_byte(uint8_t val) |
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{ |
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mess_buffer[buff_pointer++] = val; |
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} |
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void |
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GCS_SIMPLE::write_int(int val ) |
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{ |
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int_out.value = val; |
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mess_buffer[buff_pointer++] = int_out.bytes[0]; |
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mess_buffer[buff_pointer++] = int_out.bytes[1]; |
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} |
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void |
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GCS_SIMPLE::write_float(float val) |
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{ |
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double_out.float_value = val; |
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mess_buffer[buff_pointer++] = double_out.bytes[0]; |
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mess_buffer[buff_pointer++] = double_out.bytes[1]; |
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mess_buffer[buff_pointer++] = double_out.bytes[2]; |
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mess_buffer[buff_pointer++] = double_out.bytes[3]; |
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} |
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void |
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GCS_SIMPLE::write_long(long val) |
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{ |
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double_out.long_value = val; |
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mess_buffer[buff_pointer++] = double_out.bytes[0]; |
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mess_buffer[buff_pointer++] = double_out.bytes[1]; |
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mess_buffer[buff_pointer++] = double_out.bytes[2]; |
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mess_buffer[buff_pointer++] = double_out.bytes[3]; |
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} |
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void |
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GCS_SIMPLE::flush(uint8_t msg_id) |
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{ |
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_port->print("4D"); // This is the message preamble
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_port->write(buff_pointer); // Length
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_port->write(msg_id); // id
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for (uint8_t i = 0; i < buff_pointer; i++) { |
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_port->write(mess_buffer[i]); |
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} |
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buff_pointer = 0; |
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} |
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@ -1,81 +0,0 @@
@@ -1,81 +0,0 @@
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// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: t -*-
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//
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// DIYDrones Custom Mediatek GPS driver for ArduPilot and ArduPilotMega.
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// Code by Michael Smith, Jordi Munoz and Jose Julio, DIYDrones.com
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//
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// This library is free software; you can redistribute it and / or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// GPS configuration : Custom protocol per "DIYDrones Custom Binary Sentence Specification V1.1"
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//
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// Note - see GCS_SIMPLE16.h for firmware 1.6 and later.
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//
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#ifndef GCS_SIMPLE_h |
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#define GCS_SIMPLE_h |
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#include <GCS_MAVLink.h> // MAVLink GCS definitions |
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class GCS_SIMPLE { |
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public: |
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GCS_SIMPLE(Stream *s); |
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bool read(void); |
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void ack(void); |
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void write_byte(uint8_t val); |
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void write_int(int val); |
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void write_float(float val); |
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void write_long(long val); |
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void flush(uint8_t msg_id); |
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Stream *_port; ///< port the GPS is attached to
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int8_t index; |
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int8_t id; |
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int8_t p1; |
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int32_t altitude; |
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int32_t latitude; |
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int32_t longitude; |
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#pragma pack(1) |
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struct diyd_mtk_msg { |
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int8_t index; |
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int8_t id; |
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int8_t p1; |
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int32_t altitude; |
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int32_t latitude; |
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int32_t longitude; |
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}; |
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#pragma pack(pop) |
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// Receive buffer
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union { |
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diyd_mtk_msg msg; |
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uint8_t bytes[]; |
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} _buffer; |
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private: |
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// State machine state
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// incoming
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uint8_t _step; |
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uint8_t _payload_counter; |
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uint8_t _length; |
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uint8_t _id; |
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// outgoing
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union d_out{ |
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uint8_t bytes[4]; |
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int32_t long_value; |
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float float_value; |
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} double_out; |
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union i_out { |
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uint8_t bytes[2]; |
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int16_t value; |
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} int_out; |
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uint8_t mess_buffer[50]; |
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uint8_t buff_pointer; |
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}; |
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#endif // GCS_SIMPLE_H
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