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=NEC Protocol=
 
=NEC Protocol=
This protocol was
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NEC IR protocol encodes the keys using a 32bit frame format as shown below. Each bit is transmitted using the pulse distance as shown below.
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<b>Logical '0':</b> A 562.5µs pulse burst followed by a 562.5µs space, with a total transmit time of 1.125ms
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<b>Logical '0':</b> A 562.5µs pulse burst followed by a 1.6875ms space, with a total transmit time of 2.25ms
  
  
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=Downloads=
 
[[File:Schematic 8051 Interfacing Zigbee.JPG|680px]]
 
[[File:Schematic 8051 Interfacing Zigbee.JPG|680px]]
 
<span style="color:red">'''Code and Explanation will be updated soon..'''</span>
 
<span style="color:red">'''Code and Explanation will be updated soon..'''</span>

Revision as of 17:20, 29 July 2016

IR Remote Controllers and receivers follow standard protocols for sending and receiving the data. Some of the standard protocols are NEC , JVC , SIRC (Sony Infrared Remote Control) etc. We will be discussing only the NEC protocol. After understanding the frame format of IR Remote, We will be interfacing a IR receiver with 8051 and decode the key pressed.

NEC Protocol

NEC IR protocol encodes the keys using a 32bit frame format as shown below. Each bit is transmitted using the pulse distance as shown below. Logical '0': A 562.5µs pulse burst followed by a 562.5µs space, with a total transmit time of 1.125ms Logical '0': A 562.5µs pulse burst followed by a 1.6875ms space, with a total transmit time of 2.25ms


Downloads

Schematic 8051 Interfacing Zigbee.JPG Code and Explanation will be updated soon..