RFM12b Bytes recognization

Mikrokontroléry AVR
1

Hello guys.

Is somebody here who meet with RFM12b tranceiver module for wireless communication between devices?

I am doing program in C language for wireless communication and I have got a problem with recognization of bytes what i sent over.

This is side of transmitter:
I think that here is no problem{I apologize for czech language comments}

	if (otocit==1)
	{
		writeCmd(0x8239); //stan se VYSILACEM
		 //zakazani vsech preruseni {ani citac neprerusi}
		//_delay_ms(2000); //pauza pred vysilanim, nechapu proc, ale dulezita, bez ni to neslo
		
		for(i=0;i<1000;i++) // prasacke, ale musim i tu nejak kontrolovat vstupy, cili misto delay 2000
			for(j=0;j<300;j++)
			{
			if (bit_is_clear(PIND,0))
				checkC1O(); //testuje otevreni dratu porad, kazdou vterinu odesle data na pager
			if (bit_is_clear(PIND,1))
				checkC2C(); //testuje spojeni dratu porad, kazdou vterinu odesle data na pager
			} end of delay

		writeCmd(0x0000);
		cli();
		rfSend(0xAA); // PREAMBLE
		rfSend(0xAA);
		rfSend(0xAA);
		rfSend(0x2D); // SYNC
		rfSend(0xD4);
		rfSend(0x31); // dato o spojeni, tzv ACK
		rfSend(c2c); //dato o spojeni okruhu
		rfSend(c1o); //dato o rozspojeni okruhu
		rfSend(0xAA); // DUMMY Bytes
		rfSend(0xAA);
		rfSend(0xAA);
		for(i=0;i<1000;i++)
			for(j=0;j<123;j++); //pauza po vysilanim, nechapu proc, ale dulezita, bez ni to neslo
		otocit=0; // dont send data again
		writeCmd(0x8299); //stan se PRIJIMACEM
		sei(); //povoleni vsech preruseni {pro povoleni casovace} 
	
		if (citac==0) // zapnuti casovace
		{
			TCCR1B |= (1<<CS10);//|(1<<CS11); //nastaveni preddelicky na 64. Zakladni cas je cca 4,2s 
			TIMSK1 |= (1<<TOIE1); //pro vector preteceni v ISR
			citac=1; //aby neinicializoval casovac pokazdem odeslani dat
		}
	}

This is side of Receiver:
and here I dont know how I can recognize each bytes (31h, c2c, c1c) what i sent over from transmitter.

…
writeCmd(0x8299); //BUD PRIJIMACEM

					FIFOReset();
					while(1)
					{
						
						//tu opet testuju, zda jse
						BATERRY_PAGER_LED_ON; //tuto ledku si jen roziham, abych vedel, ze se to dostalo az sem
											  //ze BY MEL prijmat data a je aktivnim prijimacem	
							
						//V TOMTO whilu je asi problem, nevim jak prijmout dva bajty, jeden je od toho c2c
						//druhy od c1o
						//ten tranceiver ma fifo pro 16bytu. asi, takze to mosi staci, rozhodne jej tim prikazem
						//fifo reset nesmim mazat mezi prijmem, ale to asi delam, 
						//no a kdyz se mi ty data rovnaji tak BY se meli rozit prislusne LED, jenze se 
						//roznou nekdy, aniz by sem zpusobil vyslani na druhe srane {rozpojil c1o, nebo spojil c2c}
						
							data = rfRecv() 
						
						{
							if (data==0x88) 
							{
								C2C_LED_ON;
							
							}

							if (data==0x34) 
							{
								C1O_LED_ON;
								
							}
						}
							FIFOReset();

The function for rfRecv():

unsigned char rfRecvData() {
unsigned int data;
while(1) {
data = writeCmd(0x0000);
if ( (data&0x8000) ) {
data = writeCmd(0xB000);
return (data&0x00FF);
}
}
}
I add a tranceiver datasheet.
Thanks a lot. Luka
RF12B_code.pdf (332 KB)