Difference between revisions of "NEC IR Remote Control Interface with 8051"
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=NEC Protocol= | =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. | + | NEC IR protocol encodes the keys using a 32bit frame format as shown below. |
| − | <b>Logical '0':</b> A 562.5µs pulse burst followed by a 562.5µs space, with a total transmit time of 1.125ms | + | {| class="table table-striped table-hover table-condensed table-bordered" |
| + | |-class="info" | ||
| + | |NEC Frame Format | ||
| + | |- | ||
| + | |Address || Complement of Address || Command || Complement of Command | ||
| + | |- | ||
| + | |LSB-MSB(0-7) || LSB-MSB(8-15) || LSB-MSB(16-23) || LSB-MSB(24-31) | ||
| + | |} | ||
| + | Each bit is transmitted using the pulse distance as shown below. <br> | ||
| + | <b>Logical '0':</b> A 562.5µs pulse burst followed by a 562.5µs space, with a total transmit time of 1.125ms<br> | ||
<b>Logical '0':</b> A 562.5µs pulse burst followed by a 1.6875ms space, with a total transmit time of 2.25ms | <b>Logical '0':</b> A 562.5µs pulse burst followed by a 1.6875ms space, with a total transmit time of 2.25ms | ||
| − | |||
=Downloads= | =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 17:33, 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.
| NEC Frame Format | |||
| Address | Complement of Address | Command | Complement of Command |
| LSB-MSB(0-7) | LSB-MSB(8-15) | LSB-MSB(16-23) | LSB-MSB(24-31) |
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
Code and Explanation will be updated soon..