unsigned int XMPProtocol::calculateChecksumTwo(
unsigned int toggle,
const CommandSequence &firstCode,
const CommandSequence &secondCode)
{
// Start with the value 0xF:
unsigned int total = 0xF;
// Add the other half-bytes in the second part of the frame:
total += subDeviceOne;
total += toggle;
total += subDeviceTwo;
unsigned int codeValue = 0;
CommandSequence::const_iterator i = firstCode.begin();
while (i != firstCode.end())
{
// Shift codeValue over and add the bit:
codeValue = codeValue << 1;
codeValue += *i;
++i;
}
total += codeValue >> 4;
total += codeValue & 0xF;
codeValue = 0;
i = secondCode.begin();
while (i != secondCode.end())
{
codeValue = codeValue << 1;
codeValue += *i;
++i;
}
total += codeValue >> 4;
total += codeValue & 0xF;
// Next, invert:
total = -total;
// Finally, mod 0x10:
total = total % 0x10;
return total;
}
void PanasonicProtocol::generateChecksum(
const CommandSequence &device,
const CommandSequence &subdevice,
const CommandSequence &command,
CommandSequence &checksum)
{
checksum.clear(); // probably unnecessary sanity check.
CommandSequence::const_iterator diter = device.begin();
CommandSequence::const_iterator siter = subdevice.begin();
CommandSequence::const_iterator citer = command.begin();
while (diter !=device.end()
&& siter != subdevice.end()
&& citer != command.end())
{
checksum.push_back(*diter ^ *siter ^ *citer);
++diter;
++siter;
++citer;
}
}
int XMPProtocol::pushBits(
const CommandSequence &bits,
PIRInfraredLED &led)
{
unsigned int duration = 0;
// We can only sent 4-bit values in XMP, so need to collect bits up into
// bundles of 4:
unsigned int bitsValue = 0;
int count = 0;
CommandSequence::const_iterator i = bits.begin();
while (i != bits.end())
{
if (count < 4)
{
bitsValue = bitsValue << 1;
bitsValue += *i;
++count;
}
else
{
led.addPair(210, 760 + (136 * bitsValue));
duration += 970 + (136 * bitsValue);
count = 1;
bitsValue = *i;
}
++i;
}
if (count == 4)
{
led.addPair(210, 760 + (136 * bitsValue));
duration += 970 + (136 * bitsValue);
}
return duration;
}