DMX 512 on 8051 using SDCC

[dandumit]

dmx 8051

Hi All,

I'm trying to implement the DMX 512 for some disco lights. Anyone who has some experience in this please tell me too..

Thanks,
Daniel

 

[sut]

8051 dmx

https://www.epanorama.net/documents/lights/discolight_controlling.html

 

[dandumit]

8051 dmx512

For general links regarding DMX 512 I can give to you a lot of links like :
http://www.geocities.com/Broadway/2006/links.html

I'm asking if someone has an example using a C compiler for 8051.

10X
Daniel

 

[Bus Master]

dmx512 atmel

I've implemented this application before, i've used T89C51RC2 from Atmel CO.

The most important aspect is that your Interrupt Service Routine (ISR) that responds th the RS485 datastream, this ISR time must not exceed 44 uSec., Thus, i've used the X2 mode in the mentioned chip.

If i can help u, it'll be a great pleasure.

Yours,

 

[cube007]

dmx protocol 8051

Hello,

Normally you will connect a RS-485 logic level converter to the serial port of your uC. But how is it possible to detect if the signal between some data bytes is high or low? This is important to know because the logic level between two data bytes indicates if you should reset the byte counter or not. It would be possible to get this information with an additional port pin but I have never seen this is standard DMX-512 designs.


Bye,
cube007

 

[dmx1990]

atmel dmx512

there r a dmx 512 decoder:dm168
**broken link removed**

https://www.skylinedynamics.com/

the dm168, the 8 channels pwm(100hz, 8bit) is so good for led.