Transcription of AN1076 - Microchip Technology
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AN1076 - Microchip Technology
2007 Microchip Technology 1AN1076 INTRODUCTION DMX512 is a communication protocol used in most pro-fessional theater lighting components such as dim-mers, scanners, moving lights, strobes, etc. Thisapplication note presents a solution to transmit andreceive the DMX512 communication protocol that canbe implemented using any PIC microcontroller offer-ing a Universal Asynchronous Receiver Transmitter(UART) module. In particular, the PIC18F24J10, a gen-eral purpose device, was used in the code examplesprovided with this application note. It provides 1024bytes of data memory, which allows the demonstrationcode to store the data for the entire 512 channel buffer(although this is not required for the typical application).Only an external RS-485 compatible transceiver isrequired to complete the application DMX solution is provided in two Transmitter:This part will explain how to generate and transmit theDMX512 packets.
AN1076 DS01076A-page 4 © 2007 Microchip Technology Inc. EXAMPLE 1: DMX512 TRANSMITTER STATE MACHINE CODE Example 1 …
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