/*
 * rfm12.hpp
 *
 * Created: 08.05.2014 00:06:49
 *  Author: netz
 */ 


#ifndef RFM12_H_
#define RFM12_H_

template <typename Spi, uint8_t bandwidth, uint8_t gain, uint8_t drssi, uint32_t frequenz, uint16_t baud, uint8_t power, uint8_t mod>
class Rfm12 {
	public:
		Rfm12() {
			this->init();
		}

		void ready(void) {
			s.CSOn();
			while(s.has_data()); // wait until FIFO ready
		}

		void beginasyncrx() {
			this->send(0x82C8);			// RX on
			this->send(0xCA81);			// set FIFO mode
			this->send(0xCA83);			// enable FIFO
		}
	
		uint8_t hasdata() {
			s.CSOn();
			return s.has_data();
		}
	
		uint8_t rxbyte() {
			return this->send(0xB000);
		}

		void endasyncrx() {
			this->send(0x8208);			// RX off
		}

		void txdata(uint8_t *data, uint8_t number) {
			uint8_t i;
			this->send(0x8238);			// TX on
			this->ready();
			this->send(0xB8AA);
			this->ready();
			this->send(0xB8AA);
			this->ready();
			this->send(0xB8AA);
			this->ready();
			this->send(0xB82D);
			this->ready();
			this->send(0xB8D4);
			for (i=0; i<number; i++)
			{
				this->ready();
				this->send(0xB800|(*data++));
			}
			this->ready();
			this->send(0x8208);			// TX off
		}

		void rxdata(uint8_t *data, uint8_t number) {
			uint8_t i;
			this->send(0x82C8);			// RX on
			this->send(0xCA81);			// set FIFO mode
			this->send(0xCA83);			// enable FIFO
			for (i=0; i<number; i++)
			{
				this->ready();
				*data++=this->send(0xB000);
			}
			this->send(0x8208);			// RX off
		}

		void txpacket(uint8_t addr, uint8_t from, uint8_t data) {
			this->send(0x8238);			// TX on
			this->ready();
			this->send(0xB8AA);
			this->ready();
			this->send(0xB8AA);
			this->ready();
			this->send(0xB8AA);
			this->ready();
			this->send(0xB82D);
			this->ready();
			this->send(0xB8D4);
			this->ready();
			this->send(0xB800|addr);
			this->ready();
			this->send(0xB800|from);
			this->ready();
			this->send(0xB800|data);
			this->ready();
			this->send(0xB800);
			this->ready();
			this->send(0x8208); // TX off
			_delay_ms(100);
		}
	private:
		Spi s;
		uint16_t send(uint16_t wert) {
			s.CSOn();
			uint16_t werti = s.send((uint8_t)(wert >> 8)) << 8;
			werti |= s.send((uint8_t)wert);
			s.CSOff();
			return werti;
		}
		void init(void) {
			_delay_ms(100);

			this->send(0xC0E0);			// AVR CLK: 10MHz
			this->send(0x80D7);			// Enable FIFO
			this->send(0xC2AB);			// Data Filter: internal
			this->send(0xCA81);			// Set FIFO mode
			this->send(0xE000);			// disable wakeuptimer
			this->send(0xC800);			// disable low duty cycle
			this->send(0xC4F7);			// AFC settings: autotuning: -10kHz...+7,5kHz
		
			this->setfreq();		// Sende/Empfangsfrequenz auf 433,92MHz einstellen
			this->setbandwidth();	// 400kHz Bandbreite, 0dB Verstärkung, DRSSI threshold: -61dBm
			this->setbaud();		// 19200 baud
			this->setpower();		// 1mW Ausgangsleistung, 120kHz Frequenzshift
		}
		void setbandwidth() {
			this->send( 0x9400 | ( ( bandwidth & 7 ) << 5 ) | ( ( gain & 3 ) << 3 ) | ( drssi & 7 ) );
		}
		void setfreq() {
			uint16_t freq = (uint16_t)(((float)(frequenz-430000)/1000)/0.0025); // macro for calculating frequency value out of frequency in kHz
			if( freq < 96 ) {				// 430,2400MHz
				this->send( 0xA000 | 96 );
				} else if( freq > 3903 ) {		// 439,7575MHz
				this->send( 0xA000 | 3903 );
			}
			this->send( 0xA000 | freq );
		}
		void setbaud() {
			if (baud < 663) {
				return;
			}
			if (baud < 5400) {				// Baudrate= 344827,58621/(R+1)/(1+CS*7)
				this->send(0xC680 | ( ( 43104 / baud ) - 1 ) );
				} else {
				this->send(0xC600 | ( ( 344828UL / baud ) - 1 ) );
			}
		}
		void setpower() {
			this->send( 0x9800 | ( power & 7 ) | ( ( mod & 15 ) << 4 ) );
		}
};

#endif /* RFM12_H_ */