generate analog signal using samples fpga

[TRanjith]

Hi,

I have 20  samples of (time,data). using these samples i need to write data to AO channel in FPGA card. Here the data should be written to a channel w.r.t time. i need to generate signal(ramp) based on time and data available.

for example - 

time( in seconds) -   0   0.01   0.04   0.05  0.07 ...

data -                        0   1.0    3.2      2.5     1.3 ...

Please suggest me best way to achive this.

Thank you,

Ranjith

[Baji]

Keep all ur samples in a array and auto index the array to a for loop, Inside the for loop put a wait timer and give the dt as input(t2-t1) to the timer. Inside the loop connect the auto indexed output to the A0 Channel.

[TRanjith]

Hi Balaji,

Thanks for the quick responce.  I need the ramp between two samples. time t1 to time t2, if the data are d1 and d2. will i get ramp between d1 to d2(may be traingle wave considering all samples)? 

Thank you,

Ranjith

[Baji]

U need to interpolate between the datas so see the interpolation examples.

[TRanjith]

Hi,

Could you please give me a good logic using timed loop to achive signal interpolation using below structure.

array of 20 clusters

{

float data

float time

}

time is given in seconds and it can go upto micro/nano seconds precision. time would starts from 0 and will go on...

Data has to be written to analog channel based on above given time and data.

 Thanks in advance,

Ranjith

[TRanjith]

I could not use interpolation vis in FPGA vi. Can any one has fpga supported interpolation vi?

Need help on this..