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Reliable Data Link for Cheap RF Modules

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sshahryiar

Joined: 05 May 2010
Posts: 94
Location: Dhaka, Bangladesh

Reliable Data Link for Cheap RF Modules

Posted: Sun May 03, 2015 11:29 am

Code:

#include <12F629.h>

#device *= 16

#fuses NOWDT, PROTECT, CPD, INTRC_IO, PUT, BROWNOUT, NOMCLR

#use delay (internal = 4MHz)
#use RS232 (xmit = pin_A5, rcv = pin_A4, baud = 1200, stop = 1, parity = N)

#define BT1    input(pin_A0)
#define BT2    input(pin_A1)
#define BT3    input(pin_A2)
#define BT4    input(pin_A3)

void setup();
void send_data(unsigned char value);

void main()
{
setup();

while(TRUE)
{
   if(BT1)
   {
      while(BT1);
      send_data(0x04);
   }
   if(BT2)
   {
      while(BT2);
      send_data(0x06);
   }
   if(BT3)
   {
      while(BT3);
      send_data(0x09);
   }
   if(BT4)
   {
      while(BT4);
      send_data(0x11);
   }
};
}

void setup()
{
disable_interrupts(global);
setup_comparator(NC_NC_NC_NC);
setup_timer_0(T0_internal);
setup_timer_1(T1_disabled);
set_timer0(0);
set_timer1(0);
}

void send_data(unsigned char value)
{
unsigned char s = 0;
unsigned char hb = 0;
unsigned char lb = 0;
unsigned long temp = 0;

for(s = 0; s < 8; s++)
{
   temp <<= 2;
   if((value & 0x80) != 0)
   {
      temp |= 0x1;
   }
   else
   {
      temp |= 0x2;
   }
   value <<= 1;
}

hb = ((temp & 0xFF00) >> 8);
lb = (temp & 0x00FF);

for(s = 0; s < 2; s++)
{
   putc(0x00);
   putc(0x55);
   putc(hb);
   putc(lb);
   putc(hb & lb);
   putc(0xAA);
   delay_ms(40);
}
}

Code:

#include <16F630.h>

#device *= 16

#fuses NOMCLR, NOWDT, PROTECT, CPD, INTRC_IO, BROWNOUT

#use delay (internal = 4MHz)
#use RS232 (xmit = pin_C5, rcv = pin_C4, baud = 1200, stop = 1, parity = N)

#define OUT1    pin_C0
#define OUT2    pin_C1
#define OUT3    pin_C2
#define OUT4    pin_C3

void setup();
unsigned char receive_data();

void main()
{
unsigned char value = 0;

setup();

while(TRUE)
{

      value = receive_data();

      if(value == 0x04)
      {
         output_toggle(OUT1);
      }
      if(value == 0x06)
      {
         output_toggle(OUT2);
      }
      if(value == 0x09)
      {
         output_toggle(OUT3);
      }
      if(value == 0x11)
      {
         output_toggle(OUT4);
      }
};
}

void setup()
{
disable_interrupts(global);
setup_comparator(NC_NC_NC_NC);
setup_timer_0(T0_internal);
setup_timer_1(T1_disabled);
set_timer0(0);
set_timer1(0);
}

unsigned char receive_data()
{
unsigned char s = 0;
unsigned char cmd[4];
unsigned char tmp1 = 0;
unsigned char tmp2 = 0;
unsigned long temp = 0;

if(kbhit())
{
   if(getc() == 0x55)
   {
      for(s = 0; s < 4; s++)
      {
      cmd[s] = getc();
      }

      tmp1 = cmd[0];
   tmp2 = cmd[1];


      if(((tmp2 & tmp1) == cmd[2]) && (cmd[3] == 0xAA))
      {
         temp = tmp1;
         temp <<= 8;
         temp |= tmp2;

         tmp2 = 0;

         for(s = 0; s < 8; s++)
         {
            tmp2 <<= 1;

            if((temp & 0xC000) == 0x8000)
            {
               tmp2 |= 0x00;
            }
            else if((temp & 0xC000) == 0x4000)
            {
               tmp2 |= 0x01;
            }

temp <<= 2;
         }
      }
   }
}
return tmp2;
}

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SShahryiar

robo_z

Joined: 11 Dec 2014
Posts: 5


Posted: Sat Aug 08, 2015 3:03 pm

Thanks 4 Share

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