/*
#include <18F4620.h>
#FUSES H4,NOFCMEN,NOIESO,NOPUT,NOBROWNOUT,NOWDT,CCP2B3,NOPBADEN,LPT1OSC,NOMCLR,NOSTVREN,NOLVP,NOXINST,NODEBUG,NOPROTECT,NOWRTC,NOWRTB,NOWRTC,NOWRTD
#use delay(clock=40MHz,crystal=10MHz)
#define LCD_DB4   PIN_b4
#define LCD_DB5   PIN_b5
#define LCD_DB6   PIN_b6
#define LCD_DB7   PIN_b7
#define LCD_RS    PIN_a1
#define LCD_RW    PIN_a0
#define LCD_E     PIN_a2
#include <LCD420_Flex.c>
*/
//nRF24L01+ için yazılımsal SPI kütüphanesi
/*
#define IRQ_pin   pin_b0
#define CE_pin    pin_c0
#define SS_pin    pin_a5 // CSN-SS pin
#define MOSI_pin  pin_c5
#define MISO_pin  pin_c4
#define SCK_pin   pin_c3
*/

#define R_REGISTER_cmd                 0x00
#define W_REGISTER_cmd                 0x20
#define R_RX_PL_WID_cmd                0x60
#define R_RX_PAYLOAD_cmd               0x61
#define W_TX_PAYLOAD_cmd               0xA0
#define W_ACK_PAYLOAD_cmd              0xA8
#define W_TX_PAYLOAD_NO_ACK_cmd        0xB0
#define FLUSH_TX_cmd                   0xE1
#define FLUSH_RX_cmd                   0xE2
#define REUSE_TX_PL_cmd                0xE3

#define NOP_cmd                        0xFF


#define CONFIG_reg                     0x00
#define EN_AA_reg                      0x01
#define EN_RXADDR_reg                  0x02
#define SETUP_AW_reg                   0x03
#define SETUP_RETR_reg                 0x04
#define RF_CH_reg                      0x05
#define RF_SETUP_reg                   0x06
#define STATUS_reg                     0x07
#define OBSERVE_TX_reg                 0x08
#define RPD_reg                        0x09
#define RX_ADDR_P0_reg                 0x0A
#define RX_ADDR_P1_reg                 0x0B 
#define RX_ADDR_P2_reg                 0x0C 
#define RX_ADDR_P3_reg                 0x0D
#define RX_ADDR_P4_reg                 0x0E  
#define RX_ADDR_P5_reg                 0x0F
#define TX_ADDR_reg                    0x10
#define RX_PW_P0_reg                   0x11
#define RX_PW_P1_reg                   0x12
#define RX_PW_P2_reg                   0x13 
#define RX_PW_P3_reg                   0x14
#define RX_PW_P4_reg                   0x15
#define RX_PW_P5_reg                   0x16
#define FIFO_STATUS_reg                0x17
#define DYNPD_reg                      0x1C
#define FEATURE_reg                    0x1D

#define nrf_HIGH                       1
#define nrf_LOW                        0
//unsigned char x = 0;
int1 burst=0;


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
unsigned char nRF24L01_read()
{
unsigned char s = 0;

unsigned char msg = 0;
for(s = 0; s < 8; s++)
{
msg <<= 1;
output_bit(SCK_pin, nrf_HIGH);
if(input(MISO_pin) != 0)
{
msg |= 1;
}
output_bit(SCK_pin, nrf_LOW);
}
return msg;
}


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void nRF24L01_write(unsigned char d)
{
unsigned char s = 0;
for(s = 0; s < 8; s++)
{

if((d & 0x80) != 0)
{output_bit(MOSI_pin, nrf_HIGH);}

else
{output_bit(MOSI_pin, nrf_LOW);}

d <<= 1;
output_bit(SCK_pin, nrf_HIGH);
output_bit(SCK_pin, nrf_LOW);
}
}


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void register_write(unsigned char reg, unsigned char value)
{
output_bit(SS_pin, nrf_LOW);
nRF24L01_write((reg | W_REGISTER_cmd));
nRF24L01_write(value);
output_bit(SS_pin, nrf_HIGH);
}


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void write_command(unsigned char cmd)
{
output_bit(SS_pin, nrf_LOW);
nRF24L01_write(cmd);
output_bit(SS_pin, nrf_HIGH);
}


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
unsigned char register_read(unsigned char reg)
{
unsigned char value = 0;

output_bit(SS_pin, nrf_LOW);
nRF24L01_write((reg | R_REGISTER_cmd));
value = nRF24L01_read();
output_bit(SS_pin, nrf_HIGH);
return value;
}


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void set_TX_RX_address(unsigned char *addr, unsigned char bytes, unsigned char reg)
{
unsigned char n = 0;
output_bit(SS_pin, nrf_LOW);
nRF24L01_write((reg | W_REGISTER_cmd));
for(n = 0; n < bytes; n++)
{
nRF24L01_write(addr[n]);
}
output_bit(SS_pin, nrf_HIGH);
}


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void flush_TX_RX()
{
register_write(STATUS_reg, 0x70);
write_command(FLUSH_TX_cmd);
write_command(FLUSH_RX_cmd);
}


//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void send_data(unsigned char bytes, unsigned char *value)
{
unsigned char s = 0;
output_bit(SS_pin, nrf_LOW);
nRF24L01_write(W_TX_PAYLOAD_cmd);

for(s = 0; s < bytes; s++)
{nRF24L01_write(value[s]);}
output_bit(SS_pin, nrf_HIGH);

output_bit(CE_pin, nrf_HIGH);
delay_us(20);
output_bit(CE_pin, nrf_LOW);
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void receive_data(unsigned char bytes, unsigned char *value)
{
unsigned char s = 0;

output_bit(SS_pin, nrf_LOW);
nRF24L01_write(R_RX_PAYLOAD_cmd);
delay_us(2);

for (s = 0; s < bytes; s++)
{
value[s] = nRF24L01_read();
}
delay_us(2);
output_bit(SS_pin, nrf_HIGH);
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void nRF24L01_TX_init()
{
unsigned char address[5] = {0x64, 0xFE, 0x42, 0xAC, 0xB3};
output_bit(CE_pin, nrf_LOW);

register_write(CONFIG_reg, 0x0E);           //TX_DS is reflected to IRQ pin, enable 2 byte CRC, Power-Up, Transmitter
delay_ms(2);                         //Wait for power up
register_write(EN_AA_reg, 0x3F);            //Enable auto-ack on all pipes
register_write(EN_RXADDR_reg, 0x3F);        //Enabled RX addresses (All active)
register_write(SETUP_AW_reg, 0x03);         //5 byte address width
register_write(SETUP_RETR_reg, 0xFF);       //4000us auto retransmit delay, retry 15 times before give up
register_write(RF_CH_reg, 0x17);            //2.423Ghz RF Channel. 0x17 equals 23 on decimal
register_write(RF_SETUP_reg, 0x26);         //0 Dbm, 2Mbps, no CONT_WAWE, no PLL_LOCK
set_TX_RX_address(address, 5, TX_ADDR_reg);
flush_TX_RX();
output_bit(CE_pin, nrf_HIGH);
delay_ms(2);
//PIC içinde kalan bilgilerin temizlenmesi için sfırlanıyor. Sadece MISO ve IRQ giriş olacak ve IRQ pull-up şeklinde.
output_bit(CE_pin, nrf_LOW); 
output_bit(SS_pin, nrf_LOW);
output_bit(SCK_pin, nrf_LOW);
output_bit(MOSI_pin, nrf_LOW);
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void nRF24L01_RX_init()
{
unsigned char address[5] = {0x64, 0xFE, 0x42, 0xAC, 0xB3};
output_bit(CE_pin, nrf_LOW);

register_write(CONFIG_reg, 0x0F);           //RX_DR is reflected to IRQ pin, enable 2 byte CRC, Power-Up, Receiver
delay_ms(2);                         //Wait for power up
register_write(EN_AA_reg, 0x3F);            //Enable auto-ack on all pipes
register_write(EN_RXADDR_reg, 0x3F);        //Enabled RX addresses (All active)
register_write(SETUP_AW_reg, 0x03);         //5 byte address width
register_write(SETUP_RETR_reg, 0xFF);       //4000us auto retransmit delay, retry 15 times before give up
register_write(RF_CH_reg, 0x17);            //2.423Ghz RF Channel. 0x17 equals 23 on decimal
register_write(RF_SETUP_reg, 0x26);         //0 Dbm, 2Mbps, no CONT_WAWE, no PLL_LOCK
set_TX_RX_address(address, 5, RX_ADDR_P0_reg);
register_write(RX_PW_P0_reg, 16);         //32 bytes payload width
register_write(RX_PW_P1_reg, 16);         //32 bytes payload width
register_write(RX_PW_P2_reg, 16);         //32 bytes payload width
register_write(RX_PW_P3_reg, 16);         //32 bytes payload width
register_write(RX_PW_P4_reg, 16);         //32 bytes payload width
register_write(RX_PW_P5_reg, 16);         //32 bytes payload width
flush_TX_RX();
output_bit(CE_pin, nrf_HIGH);
delay_ms(2);
//PIC içinde kalan bilgilerin temizlenmesi için sfırlanıyor. Sadece MISO ve IRQ giriş olacak ve IRQ pull-up şeklinde.
output_bit(CE_pin, nrf_LOW); 
output_bit(SS_pin, nrf_LOW);
output_bit(SCK_pin, nrf_LOW);
output_bit(MOSI_pin, nrf_LOW);
}

void start_listening()
{
nRF24L01_RX_init();         //Re-init module
output_high(CE_pin);      
delay_us(250);            //Keep CE high, after 130us module starts listening
}

void stop_listening()
{
//nRF24L01_RX_init();         //Re-init module
output_low(CE_pin);      
flush_TX_RX();
}