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Add the KISS encoding.

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This commit is contained in:
Jonathan Naylor 2020-06-21 14:28:40 +01:00
parent 692d6519db
commit 38f59236ae
1 changed files with 33 additions and 10 deletions
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43
AX25Network.cpp
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@ -25,7 +25,14 @@
#include <cassert>
#include <cstring>
const unsigned int BUFFER_LENGTH = 200U;
const unsigned int BUFFER_LENGTH = 500U;
const unsigned char AX25_KISS_DATA = 0x00U;
const unsigned char AX25_FEND = 0xC0U;
const unsigned char AX25_FESC = 0xDBU;
const unsigned char AX25_TFEND = 0xDCU;
const unsigned char AX25_TFESC = 0xDDU;
CAX25Network::CAX25Network(const std::string& port, unsigned int speed, bool debug) :
m_serial(port, SERIAL_SPEED(speed), false), // XXX
@ -62,20 +69,36 @@ bool CAX25Network::write(const unsigned char* data, unsigned int length)
{
assert(data != NULL);
unsigned char buffer[110U];
::memset(buffer, 0x00U, 110U);
m_txLength = 0U;
m_txOffset = 0U;
buffer[0U] = 'A';
buffer[1U] = 'X';
buffer[2U] = '2';
buffer[3U] = '5';
m_txData[m_txLength++] = AX25_FEND;
m_txData[m_txLength++] = AX25_KISS_DATA;
::memcpy(buffer + 4U, data, length);
for (unsigned int i = 0U; i < length; i++) {
unsigned char c = data[i];
switch (c) {
case AX25_FEND:
m_txData[m_txLength++] = AX25_FESC;
m_txData[m_txLength++] = AX25_TFEND;
break;
case AX25_FESC:
m_txData[m_txLength++] = AX25_FESC;
m_txData[m_txLength++] = AX25_TFESC;
break;
default:
m_txData[m_txLength++] = c;
break;
}
}
m_txData[m_txLength++] = AX25_FEND;
if (m_debug)
CUtils::dump(1U, "AX25 Network Data Sent", buffer, length + 4U);
CUtils::dump(1U, "AX25 Network Data Sent", m_txData, m_txLength);
return m_socket.write(buffer, length + 4U, m_address, m_port);
return m_serial.write(m_txData, m_txLength);
}
void CAX25Network::reset()