get microsecond precision using 40mhz clock

[TRanjith]

Hi,

The time deference between 2 subsequent loops should be 1 micro second. i have 40mhz clock and its derivatives. how can achive this.?

Thank you,

Ranjith

[jcarmody]

Single-Cycle Timed Loop

[TRanjith]

Hi Jim,

Do i have to apply  some math to get one microsecond time for each iteration?

I have one more question:

I could see FPGA analog channel can take 16 bit data. but i receive float data from 3rd party software. How do i manage this?

Thanks,

Ranjith

[JK1]

Scale the float data (SGL or DBL) from the software to 16 bit data. i.e. if the voltage range of the AI is +-10V then accomodate this data within the entire I16 datatype. 0- -1V and 2^16 - +10V

Cheers.

[TRanjith]

Hi JK,

I didnt get what do you mean by below line

0- -1V and 2^16 - +10V

Thank you,

Ranjith

[JK1 · Accepted solution]

Sorry there was a mistake.

Assuming that the range of analog input is +-10V:

Scale the -10V as 0 (16 bit binary)

and 10V as  65536 (2^16 last value of the 16 bit range)

Take care of complementing the sign bit (since Its signed integer) when moving from -10V to -1 and then from 0 to 10V