#include <16F690.H> 
#include<ctype.h>
#include<MATH.H>
#include<stddef.h>
#include<stdlib.h>
#include<string.h>
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   
      B4->SDO
      B6->SCK
      C7->SDI
      C1->nSEL   //wenn auf 0, wird dieses modul angesprochen wo es dran hängt
      
      FSK/DATA/nFFS is pullup with 10KOHM
      FFIT wenn daten empfangen wurden, kann über diesen pin abgefragt werden
      set_tris_c().... 0 is output
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
*/

#fuses INTRC_IO, NOWDT, NOPROTECT 
#use delay(clock=4000000)
#use RS232(BAUD=9600, XMIT=PIN_B7, RCV=PIN_B5)

#define nSEL PIN_C1
#define LED  PIN_C3
#define IRQ  PIN_A1
#byte SSPSTAT = 0x94

void RF_WRITE_CMD(int16 acmd);
void RF12_INIT();
void TEMP_DATEN_SEND(int8 data_temp);
void OUTPUT_INIT(void);
void rf12_ready(void);
int16 RW_DATEN(int8 data_status);



int8 data_temp=0x00, data_status=0x00;
//int16  status=0x0000;

//+++++++++++++++++++++++++++++++++++MAIN++++++++++++++++++++++++++++++++++++++++++++++++
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void main()
{
      OUTPUT_INIT();
      RF12_INIT();
   output_high(LED); //LED leuchtet wen initialisierung erfolgt ist
   data_temp=0x01; //Temperatur
   data_status=0x00;
   //RW_DATEN(data_status); //bevor Daten senden immer Status abfragen, sonst funktioniert es nicht
   while(TRUE)
   {
      delay_ms(10);
      RW_DATEN(data_status);//bevor Daten senden immer Status abfragen, sonst funktioniert es nicht 
      TEMP_DATEN_SEND(data_temp);  
   }
}




//+++++++++++++++++++++++++++++++++++OUTPUT_INIT++++++++++++++++++++++++++++++++++++++++++++++++
void OUTPUT_INIT(void)
{
   set_tris_c(0x7D); // nsel output  &  SDO output & LED output
   set_tris_b(0x10); // sck output & SDI input      output=0
   setup_spi(SPI_MASTER | SPI_H_TO_L | SPI_CLK_DIV_16);      // Master Mode, fosc/16
   SSPSTAT|=(1<<7); //das der spi bus des pic gleich abfragt wie der rfm12
}

//+++++++++++++++++++++++++++++++++++RF12_INIT++++++++++++++++++++++++++++++++++++++++++++++++
void RF12_INIT()
{
   RF_WRITE_CMD(0xC0E0);                        // AVR CLK: 10MHz
   RF_WRITE_CMD(0x80D7);                        // Enable FIFO 80e
   RF_WRITE_CMD(0xC2AB);                        // Data Filter: internal
   RF_WRITE_CMD(0xCA81);                        // Set FIFO mode
   RF_WRITE_CMD(0xE000);                        // disable wakeuptimer
   RF_WRITE_CMD(0xC800);                        // disable low duty cycle
   RF_WRITE_CMD(0xC4F7);                        // AFC settings: autotuning: -10kHz...+7,5kHz
   RF_WRITE_CMD(0xA620);                        // 433.92 MHz
   RF_WRITE_CMD(0x9400|((5&7)<<5)|((1&3)<<3)|(4&7)); //Bandwith=5, Gane=1, drssi=4
   RF_WRITE_CMD(0xC611);                        //baud=19200
   RF_WRITE_CMD(0x9810);                        //pos frequ shift, defiation 30kHz, power out 0dB
   RF_WRITE_CMD(0x0000);
}

//+++++++++++++++++++++++++++++++++++RF_WRITE_CMD++++++++++++++++++++++++++++++++++++++++++++++++
void RF_WRITE_CMD(int16 daten)
{   
   int8 data_low;
   int8 data_high;

   data_low=(int8)daten;
   data_high=(int8)(daten>>=8 );
   
   output_low(nSEL);    //NSEL LOW            
   spi_write(data_high);//erstes datenbyte               
   spi_write(data_low); //zweites datenbyte   
   output_high(nSEL);   //NSEL HIGH
}

//+++++++++++++++++++++++++++++++++++TEMP_daten_SENDEN++++++++++++++++++++++++++++++++++++++++++++++++
void TEMP_DATEN_SEND(int8 data_temp)
{ 
   output_low(nSEL);
   RF_WRITE_CMD(0x8230);                        // TX on 
   
   rf12_ready();
   spi_write(0xB8);
   spi_write(0x2D);
   rf12_ready();
   spi_write(0xB8);
   spi_write(0xD4);
   rf12_ready();
   spi_write(0xB8);                             //send_byte
   spi_write(data_temp);
   rf12_ready();
   
   RF_WRITE_CMD(0x8200);                        // TX off
   output_high(nSEL);
}

//++++++++++++++++++++++++++++++++++STATUS_AUSLESEN+++++++++++++++++++++++++++++++++++++++++++++++++++
int16 RW_DATEN(int8 data_status)
{
   int8  stat_l=0x00, stat_h=0x00;

   output_low(nSEL);
   stat_h=spi_read(0x00);     //(data_status) 
   stat_l=spi_read(0x00);
   printf("Status:%X %X\n\r",stat_h,stat_l);
   output_high(nSEL);

   return TRUE;
}

//++++++++++++++++++++++++++++++++++RF_12_READY+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void rf12_ready(void)
{
  while(input(nIRQ));
  prinft("nIRQ");
}

//++++++++++++++++++++++++++++++++++++++TEMP_EINLESEN++++++++++++++++++++++++++++++++++++++++++++++++++
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++