98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
#include "W433DataTransmitter.h"
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#include "writepin.h"
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W433DataTransmitter::W433DataTransmitter(volatile unsigned char *port, const unsigned char pin): _port(port), _pin(pin)
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{
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}
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void W433DataTransmitter::sendBit(const bool bit)
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{
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switch(bit)
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{
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case true:
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writePin(_port,_pin,true);
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_delay_us(SMALL_TIME);
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writePin(_port,_pin,false);
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_delay_us(LARGE_TIME);
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writePin(_port,_pin,true);
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_delay_us(SMALL_TIME);
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writePin(_port,_pin,false);
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_delay_us(LARGE_TIME);
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break;
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case false:
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writePin(_port,_pin,true);
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_delay_us(LARGE_TIME);
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writePin(_port,_pin,false);
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_delay_us(SMALL_TIME);
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writePin(_port,_pin,true);
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_delay_us(SMALL_TIME);
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writePin(_port,_pin,false);
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_delay_us(LARGE_TIME);
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break;
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}
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}
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void W433DataTransmitter::sendSyncpulse()
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{
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for(uint8_t i = 0; i < 25; ++i)
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{
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writePin(_port,_pin,true);
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_delay_us(SYNC_TIME);
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writePin(_port,_pin,false);
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_delay_us(SYNC_TIME);
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}
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}
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void W433DataTransmitter::sendEndPulse()
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{
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writePin(_port,_pin,false);
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_delay_us(LARGE_TIME);
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writePin(_port,_pin,true);
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_delay_us(LARGE_TIME);
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writePin(_port,_pin,false);
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_delay_us(LARGE_TIME*10);
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}
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void W433DataTransmitter::sendRawData(const uint8_t data)
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{
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for(uint8_t i = 0; i < 8; i++) sendBit(data & ( 1 << (7 - i)));
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}
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void W433DataTransmitter::sendPacket(const uint32_t data)
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{
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sendSyncpulse();
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_delay_us(LARGE_TIME);
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sendRawData(signature);
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uint8_t checksum = 0;
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for(uint8_t i = 0; i < 4; ++i)
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{
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uint8_t dataOctet = (data & (0xFF000000 >> i*8 )) >> (24 - 8*i);
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for(uint8_t i = 0; i < 8; i++) checksum = checksum + (dataOctet & ( 1 << (8 - i)));
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sendRawData( dataOctet );
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}
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sendRawData( checksum );
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sendEndPulse();
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}
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void W433DataTransmitter::send(const uint8_t* const data, uint16_t length)
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{
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uint16_t packets = length/4;
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if(length % 4 != 0) ++packets;
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for(uint8_t j = 0; j < packets; j++)
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{
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uint32_t paketData = 0;
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uint8_t* paketDataPointer = reinterpret_cast<uint8_t*>(&paketData);
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for(uint8_t i = 0; i < 4 && j*4+i < length; i++) paketDataPointer[3-i] = data[j*4+i];
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sendPacket(paketData);
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}
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}
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void W433DataTransmitter::send(const uint8_t data)
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{
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sendPacket(data);
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}
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