Problem Related Cordic Sin Cos Block

ab12 · ‎01-13-2011

Hi

I am working on System generator 11.

I want to implement ECg signal in FPGA using system generator.

I want to know that how we can give vectorized input to cordic sin cos block.

The file is also attached.....

francism · ‎05-23-2008

Hi,

sorry what do you mean by vectorise input. Would this just be an address to the sin/cos Lookuptable?

My advice is to change your data so that it follows the format required for the block you are using.

regards

Mike

ab12 · ‎01-13-2011

Hi,
how can i give the input angle to the cordic sin cos block.

ywu · ‎11-28-2007

Increae the simuation time (currently set to 10) to be longer (for example 100) than the latency of the Cordic block (currently 11 as noted by z-11 on the block). If you do that, you will get the correct result. Also, as Mike suggested, you should also change the input format to match the Cordic block (currently 16.13 in your model).

Cheers,
Jim

ab12 · ‎01-13-2011

Hi,

I am not getting proper output. Whatever values i am giving to the constant block, i am getting the same output.

please help.... i am stuck at this point for a month now... I need to generate the sin and cosine value of 2*pi*n/2( where n= 1:1:100)...... What should i do........

Please have a look at my attachment.......

ywu · ‎11-28-2007

As I already said, there is nothing wrong with the model attached to your original post. You just need to run the simulation longer than 10 seconds (for example, try put 100 in the sim time entry box the one next to the simulation start/stop button).

ab12 wrote:

Hi,

     I am not getting proper output. Whatever values i am giving to the constant block, i am getting the same output.

     please help.... i am stuck at this point for a month now... I need to generate the sin and cosine value of 2*pi*n/2( where n= 1:1:100)...... What should i do........

  Please have a look at my attachment.......

Cheers,
Jim