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Change transmition proctocoll to new version

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This commit is contained in:
uvos 2023-03-30 19:26:20 +02:00
parent 1f18e76622
commit 0969918f04
2 changed files with 61 additions and 85 deletions
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107
W433DataTransmitter.cpp
View File

@ -1,93 +1,64 @@
#include "W433DataTransmitter.h"
#include "writepin.h"
#include <util/crc16.h>
W433DataTransmitter::W433DataTransmitter(volatile unsigned char *port, const unsigned char pin): _port(port), _pin(pin)
{
}
void W433DataTransmitter::sendBit(const bool bit)
{
switch(bit)
{
case true:
writePin(_port,_pin,true);
_delay_us(SMALL_TIME);
writePin(_port,_pin,false);
_delay_us(LARGE_TIME);
writePin(_port,_pin,true);
_delay_us(SMALL_TIME);
writePin(_port,_pin,false);
_delay_us(LARGE_TIME);
break;
case false:
writePin(_port,_pin,true);
_delay_us(LARGE_TIME);
writePin(_port,_pin,false);
_delay_us(SMALL_TIME);
writePin(_port,_pin,true);
_delay_us(SMALL_TIME);
writePin(_port,_pin,false);
_delay_us(LARGE_TIME);
break;
}
uint16_t W433DataTransmitter::calcCrc(const uint32_t data)
{
uint16_t crc = 0xffff;
const uint8_t* ptr = reinterpret_cast<const uint8_t*>(&data);
for(uint8_t i = 0; i < sizeof(data); ++i)
crc = _crc_ccitt_update(crc, ptr[i]);
return crc;
}
void W433DataTransmitter::sendSyncpulse()
void W433DataTransmitter::sendSymbol(const uint8_t data)
{
for(uint8_t i = 0; i < 25; ++i)
{
writePin(_port,_pin,true);
_delay_us(SYNC_TIME);
writePin(_port,_pin,false);
_delay_us(SYNC_TIME);
}
for(uint8_t i = 0; i < 6; ++i)
{
writePin(_port, _pin, data & 1<<i);
_delay_us(DELAY_US);
}
}
void W433DataTransmitter::sendEndPulse()
void W433DataTransmitter::sendData(const uint8_t data)
{
writePin(_port,_pin,false);
_delay_us(LARGE_TIME);
writePin(_port,_pin,true);
_delay_us(LARGE_TIME);
writePin(_port,_pin,false);
_delay_us(LARGE_TIME*10);
}
void W433DataTransmitter::sendRawData(const uint8_t data)
{
for(uint8_t i = 0; i < 8; i++) sendBit(data & ( 1 << (7 - i)));
sendSymbol(symbols[data & 0x0F]);
sendSymbol(symbols[data >> 4]);
}
void W433DataTransmitter::sendPacket(const uint32_t data)
{
sendSyncpulse();
_delay_us(LARGE_TIME);
sendRawData(signature);
uint8_t checksum = 0;
for(uint8_t i = 0; i < 4; ++i)
{
uint8_t dataOctet = (data & (0xFF000000 >> i*8 )) >> (24 - 8*i);
//for(uint8_t i = 0; i < 8; i++) checksum = checksum + (dataOctet & ( 1 << (8 - i)));
for(uint8_t i = 0; i < 8; i++) checksum = checksum + ((dataOctet & ( 1 << (8 - i))) >> (8 - i));
sendRawData( dataOctet );
}
sendRawData( checksum );
sendEndPulse();
_delay_ms(LONG_DELAY_MS);
sendSymbol(SIGNATURE & 0b111111);
sendSymbol(SIGNATURE >> 6);
for(uint8_t i = 0; i < 4; ++i)
{
uint8_t dataOctet = (data & (0xFF000000 >> i*8 )) >> (24 - 8*i);
sendData(dataOctet);
}
uint16_t crc = calcCrc(data);
sendData(crc & 0xFF);
sendData(crc >> 8);
}
void W433DataTransmitter::send(const uint8_t* const data, uint16_t length)
{
uint16_t packets = length/4;
if(length % 4 != 0) ++packets;
for(uint8_t j = 0; j < packets; j++)
{
uint32_t paketData = 0;
uint8_t* paketDataPointer = reinterpret_cast<uint8_t*>(&paketData);
for(uint8_t i = 0; i < 4 && j*4+i < length; i++) paketDataPointer[3-i] = data[j*4+i];
sendPacket(paketData);
}
if(length % 4 != 0)
++packets;
for(uint8_t j = 0; j < packets; j++)
{
uint32_t paketData = 0;
uint8_t* paketDataPointer = reinterpret_cast<uint8_t*>(&paketData);
for(uint8_t i = 0; i < 4 && static_cast<uint16_t>(j*4+i) < length; i++)
paketDataPointer[3-i] = data[j*4+i];
sendPacket(paketData);
}
}
void W433DataTransmitter::send(const uint8_t data)

39
W433DataTransmitter.h
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@ -7,24 +7,29 @@
class W433DataTransmitter
{
private:
static constexpr uint16_t LARGE_TIME = 2000;
static constexpr uint16_t SMALL_TIME = 500;
static constexpr uint16_t SYNC_TIME = 800;
static constexpr uint8_t signature = 0xA5;
volatile unsigned char * const _port;
const unsigned char _pin;
void sendBit(const bool bit);
void sendSyncpulse();
void sendRawData(const uint8_t data);
void sendEndPulse();
static constexpr uint16_t BIT_RATE = 2000;
static constexpr int32_t DELAY_US = 1000000/BIT_RATE;
static constexpr int16_t LONG_DELAY_MS = 10;
static constexpr uint16_t SIGNATURE = 0xb38;
volatile unsigned char * const _port;
const unsigned char _pin;
void sendSymbol(const uint8_t data);
void sendData(const uint8_t data);
static constexpr int SYMBOL_TABLE_SIZE = 16;
static constexpr uint8_t symbols[SYMBOL_TABLE_SIZE] =
{
0xd, 0xe, 0x13, 0x15, 0x16, 0x19, 0x1a, 0x1c,
0x23, 0x25, 0x26, 0x29, 0x2a, 0x2c, 0x32, 0x34
};
uint16_t calcCrc(const uint32_t data);
public:
W433DataTransmitter(volatile unsigned char * const port, const unsigned char pin);
void send(const uint8_t* const data, uint16_t length);
void send(const uint8_t data);
void sendPacket(const uint32_t data);
W433DataTransmitter(volatile unsigned char * const port, const unsigned char pin);
void send(const uint8_t* const data, uint16_t length);
void send(const uint8_t data);
void sendPacket(const uint32_t data);
};