Hello everybody,I started to work in an application that uses labview to communicate with arduino. The arduino board will be connected to several AD5204 digital potentiometers. This potentiometers are connected in serie and I want to use "Daisy Chaining" to program them.My first idea was using SPI communication blocks of Arduino to send the information but, the problem is that I want to use "Daisy Chaining" and every potentiomenter needs 11 bits (address+data) to be programmed. As I saw using SPI communication I can send only messages of 8 bits and not of 11 bits. That will provoke a wrong receival of the information by the potentiometers, because of the "Daisy Chaining".That's why I tried another thing. I tried to generate the clock, the data and the chip select signals directly without using SPI blocks, using some loops and common blocks to write a digital pin in Arduino. In that way I am able to send the information I need, but, the problem now is that the clock signal is only 18Hz. Is there a way to generate a clock signal that goes out through a determined pin of the Arduino of at least 100KHz?If somebody knows that I would be very happy to receive and answer. Then I will be able to finish my application.Thanks!

Hello,Thanks Albert.Geven, that is a good idea. The last days I was thinking on this problem and I am almost sure that I found a "easier" solution. The idea is to adapt the 11 bit "packets" into 8 bit messages.For example, if I have 16 chips, we need to send 16 "packets" of 11 bits, that's 704bits. If I divide this 704bits into messages of 8 bits I will have to send 22 messages. If the number of 8bits messages is not a integer, we will have to fill the last message with as much 0 as necessary.I still have to test this on the real chips, but I hope this will work.Thanks,

LabVIEW Interface for Arduino Discussions

Generating clock signal of KHz on Arduino digital output pin

Solved!

Hello dp18,

can you please share to me your code?

My email is: mlfreeride@hotmail.it

Thank you in advance.

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LabVIEW Interface for Arduino Discussions

Generating clock signal of KHz on Arduino digital output pin

Re: Generating clock signal of KHz on Arduino digital output pin