5 replies to this topic

[fexxx]

Hello,


I've done a small personal project using Arduino that uses an LDP6803 based LED strip for lighting. The LED strip is driven every 25 microseconds using an interrupt for Arduino's hardware clock. The interrupt code is responsible for sending 16 bits per LED to the LED strip.

The code for sending the actual bits looks like this:

digitalWrite(dataPin, bit);
digitalWrite(clockPin, HIGH);
digitalWrite(clockPin, LOW);

As an experienced .NET developer I would like to starting using NetDuino, can anybody tell me how I would go about porting this code? From what I've seen it looks like I can just create two output ports and write to them, but I am uncertain about the 25 microseconds clock interval.

Thanks!!

[SkyLiberty]

So .Net is not a language, is a framework!! So you have to understand it to begin coding!

For the particular translation you asked:

OutputPort out =new OutputPort(Pins.GDIO1,false); //this initialize the obkect that work on digital output

out.write(true); //or false --------> send the data thruth the port

But what knoledge do you have on C# ?

[freds]

Hello,


I've done a small personal project using Arduino that uses an LDP6803 based LED strip for lighting. The LED strip is driven every 25 microseconds using an interrupt for Arduino's hardware clock. The interrupt code is responsible for sending 16 bits per LED to the LED strip.

The code for sending the actual bits looks like this:

digitalWrite(dataPin, bit);
digitalWrite(clockPin, HIGH);
digitalWrite(clockPin, LOW);

As an experienced .NET developer I would like to starting using NetDuino, can anybody tell me how I would go about porting this code? From what I've seen it looks like I can just create two output ports and write to them, but I am uncertain about the 25 microseconds clock interval.

Thanks!!

If the timings are that tight then you can not achive it from c#, check out the discussions on the bitbanger firmware.

[CW2]

I've done a small personal project using Arduino that uses an LDP6803 based LED strip for lighting. The LED strip is driven every 25 microseconds using an interrupt for Arduino's hardware clock. The interrupt code is responsible for sending 16 bits per LED to the LED strip.

If the timings are that tight then you can not achive it from c#, check out the discussions on the bitbanger firmware.

I have not looked into the LDP6803 datasheet, but sending 16-bits at 25 µs clock can be achieved by Netduino's SPI interface - use 40 kHz clock rate and 16-bit Write() method. But I am not sure if the '16 bits per LED' must be transmitted continuously, or once a time.

[freds]

I have not looked into the LDP6803 datasheet, but sending 16-bits at 25 µs clock can be achieved by Netduino's SPI interface - use 40 kHz clock rate and 16-bit Write() method. But I am not sure if the '16 bits per LED' must be transmitted continuously, or once a time.

Hi Fexelein

Do you have URL for a data sheet or application note for the LDP6803? There appears to be lots of references to products using the chip but not the chip it self.

[fexxx]

Do you have URL for a data sheet or application note for the LDP6803? There appears to be lots of references to products using the chip but not the chip it self.

 

http://www.adafruit....ets/LPD6803.pdf