84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
#include <Arduino.h>
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#include <MiLightRemoteType.h>
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#include <Size.h>
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#include <RadioUtils.h>
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#ifndef _MILIGHT_RADIO_CONFIG
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#define _MILIGHT_RADIO_CONFIG
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#define MILIGHT_MAX_PACKET_LENGTH 9
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class MiLightRadioConfig {
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public:
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static const size_t NUM_CHANNELS = 3;
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// We can set this to two possible values. It only has an affect on the nRF24 radio. The
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// LT8900/PL1167 radio will always use the raw syncwords. For the nRF24, this controls what
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// we set the "address" to, which roughly corresponds to the LT8900 syncword.
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//
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// The PL1167 packet is structured as follows (lengths in bits):
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// Preamble ( 8) | Syncword (32) | Trailer ( 4) | Packet Len ( 8) | Packet (...)
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//
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// 4 -- Use the raw syncword bits as the address. This means the Trailer will be included in
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// the packet data. Since the Trailer is 4 bits, packet data will not be byte-aligned,
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// and the data must be bitshifted every time it's received.
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//
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// 5 -- Include the Trailer in the syncword. Avoids us needing to bitshift packet data. The
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// downside is that the Trailer is hardcoded and assumed based on received packets.
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//
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// In general, this should be set to 5 unless packets that should be showing up are
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// mysteriously not present.
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static const uint8_t SYNCWORD_LENGTH = 5;
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MiLightRadioConfig(
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const uint16_t syncword0,
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const uint16_t syncword3,
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const size_t packetLength,
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const uint8_t channel0,
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const uint8_t channel1,
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const uint8_t channel2,
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const uint8_t preamble,
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const uint8_t trailer
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) : syncword0(syncword0)
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, syncword3(syncword3)
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, packetLength(packetLength)
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{
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channels[0] = channel0;
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channels[1] = channel1;
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channels[2] = channel2;
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size_t ix = SYNCWORD_LENGTH;
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// precompute the syncword for the nRF24. we include the fixed preamble and trailer in the
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// syncword to avoid needing to bitshift packets. trailer is 4 bits, so the actual syncword
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// is no longer byte-aligned.
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if (SYNCWORD_LENGTH == 5) {
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syncwordBytes[ --ix ] = reverseBits(
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((syncword0 << 4) & 0xF0) | (preamble & 0x0F)
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);
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syncwordBytes[ --ix ] = reverseBits((syncword0 >> 4) & 0xFF);
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syncwordBytes[ --ix ] = reverseBits(((syncword0 >> 12) & 0x0F) + ((syncword3 << 4) & 0xF0));
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syncwordBytes[ --ix ] = reverseBits((syncword3 >> 4) & 0xFF);
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syncwordBytes[ --ix ] = reverseBits(
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((syncword3 >> 12) & 0x0F) | ((trailer << 4) & 0xF0)
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);
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} else {
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syncwordBytes[ --ix ] = reverseBits(syncword0 & 0xff);
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syncwordBytes[ --ix ] = reverseBits( (syncword0 >> 8) & 0xff);
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syncwordBytes[ --ix ] = reverseBits(syncword3 & 0xff);
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syncwordBytes[ --ix ] = reverseBits( (syncword3 >> 8) & 0xff);
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}
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}
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uint8_t channels[3];
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uint8_t syncwordBytes[SYNCWORD_LENGTH];
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uint16_t syncword0, syncword3;
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const size_t packetLength;
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static const size_t NUM_CONFIGS = 5;
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static MiLightRadioConfig ALL_CONFIGS[NUM_CONFIGS];
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};
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#endif
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