How to read the IR sensor , as i m using NEC protocol

i m facing problem in reading the bits of IR sensor . is der any body to help me

with 8051

which IR sensor you are using..

sam185 said:

which IR sensor you are using..

Click to expand...

TSOP 1738 IR sensor i m using

---------- Post added at 13:37 ---------- Previous post was at 13:36 ----------

ajit4u said:

TSOP 1738 IR sensor i m using

Click to expand...

and i m using 8051 with freq 11.0592mhz

It will function at 38khz frequency that can be generated in uc itself.
view the link below:

http://www.datasheetcatalog.org/datasheets/208/301092_DS.pdf

sam185 said:

It will function at 38khz frequency that can be generated in uc itself.
view the link below:

http://www.datasheetcatalog.org/datasheets/208/301092_DS.pdf

Click to expand...

if you have any code for Reading byte by byte code from IR sensor through remote please give me.
in my project i hv to read the remote keys and display on the LCD.
In LCD side i dont hv any prob . but READING IR sensor Bytes Using NEC protocol is the problem,
please Help me sir

Hi,
To familiarize yourself with the NEC protocol, please check this useful link. You should have a thorough knowledge of the protocol before coding.
SB-Projects: IR remote control: NEC protocol

eg:





Hope this helps.
Tahmid.

here is my code , but how to get the proper byte and dislay,
i knows the NEC protocol


#include"IR_controller.h"
void LoadTimer0(unsigned char LoadCode)
{
switch(LoadCode)
{
case LoadValue9ms: TH0=0xDF;TL0=0x99; break;
case LoadValue4ms5: TH0=0xEF;TL0=0xCC; break;
case LoadValue0ms56: TH0=0xFD;TL0=0xFB; break;
case LoadValue0ms565: TH0=0xFD;TL0=0xF7; break;
case LoadValue1ms69: TH0=0xF9;TL0=0xEA; break;
}
TF0 = 0; //reset the TF value
}

void IRsend(IRaddress,IRcommand)

unsigned char IRaddress,IRcommand;

{
unsigned char x,y,temp;

TMOD = (TMOD & 0xF0) | 0x01;
TR0 = 1;

IRsendport = 1;
LoadTimer0(LoadValue9ms);
while(TF0!=1);

IRsendport = 0;
LoadTimer0(LoadValue4ms5);
while(TF0!=1);

for(y=0;y<4;y++)
{
switch
{
case 0: temp = IRaddress; break;
case 1: temp = ~IRaddress; break;
case 2: temp = IRcommand; break;
case 3: temp = ~IRcommand; break;
}
for(x=0;x<8;x++)
{
IRsendport = 1;
LoadTimer0(LoadValue0ms56);
while(TF0!=1);

IRsendport = 0;

if ((temp & 0x01) == 0)
{
LoadTimer0(LoadValue0ms565);
}
else
{
LoadTimer0(LoadValue1ms69);
}

while(TF0!=1);
temp = temp >> 1;
}

}
IRsendport = 1;
LoadTimer0(LoadValue0ms56);
while(TF0!=1);
IRsendport = 0;

}

---------- Post added at 15:19 ---------- Previous post was at 15:06 ----------

Tahmid said:

Hi,
To familiarize yourself with the NEC protocol, please check this useful link. You should have a thorough knowledge of the protocol before coding.
SB-Projects: IR remote control: NEC protocol

i knows the NEC protocol

if u have the proper code for reading remot entered code and displaying that code on lcd using 8051 controller , please pass to me . urgent


[

Click to expand...

the above program u write is for ir transmission
if u find ir reception code for nec protocol , the remote i m using have ic sc6121
if anyone has c code for that then send it on my email id plzzzzzz.
munishgoyal2008@gmail.com