karthickiw
Joined: 09 Aug 2007
Posts: 82
Location: TN, India
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| problem with RC5 remote code... |
 Posted: Wed May 28, 2008 11:43 am |
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hai friends,
i try below code for decodes the RC5 remote code and send to rs232 port.. when press remote button, i don't got any data from rs232 port. please check the code and give the solution for problem.
| Code: | #include <16F877a.h>
#use delay(clock=20000000)
#fuses NOWDT,HS, NOPUT, NOPROTECT, BROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
int1 get_RC5(void);
#define IR_INPUT PIN_B0 // the infrared receiver has to be connected to an
// interrupt-pin!
#define IR_STATUS (!input(IR_INPUT)) // invert the signal from the infrared receiver
typedef struct
{
int8 data[2];
int8 state;
} rc5_struct;
rc5_struct rc5;
#int_EXT
EXT_isr()
{
get_RC5();
}
int1 get_RC5(void)
{
int16 tmp,t;
int i;
int1 inp;
set_timer1(0);
while(IR_STATUS==1);
t=get_timer1();
if ((t<400) || (t>800)) return 0; // no RC5 code, abort decoding
for (i=0;i<13;i++)
{
inp=IR_STATUS;
set_timer1(0);
while (IR_STATUS==inp)
{
t=get_timer1();
if (t>800) return 0; // no RC5 code, abort decoding
}
tmp<<=1;
if (inp==0) tmp++;
set_timer1(0);
while (get_timer1()<776); // a simple delay would work here as well
}
tmp=tmp | 0x3000;
tmp=tmp & 0x37ff; // cut off togglebit
rc5.data[0]=tmp & 0xff; // device address
tmp>>=8;
rc5.data[1]=tmp & 0xff; // command code
rc5.state = 1;
disable_interrupts(INT_EXT);
write_eeprom(0,rc5.data[0]);
write_eeprom(1,rc5.data[1]);
return 1;
}
void main()
{
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_8);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
enable_interrupts(INT_EXT);
enable_interrupts(GLOBAL);
write_eeprom(0,0Xff);
write_eeprom(1,0Xff);
rc5.state = 0;
output_high(pin_b1);
while(1)
{
if(rc5.state==1) // did we receive a valid RC5 - command?
{
printf("data[0] = %d ",rc5.data[0]);
printf("data[1] = %d ",rc5.data[1]);
output_low(pin_b1);
rc5.state = 0;
enable_interrupts(INT_EXT);
}
}
} |
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