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Yes, but 2^3.14159 is...?
Remember, this is floating-point. Sorry if I wasn't clear on that.
Great, I'll look into the log2 link. Thanks!
-- Josh
P.S. Anyone know how to do a good approximation to arctangent?
Hi all,
I'm looking to do some simple low-level approximations of sin, atan, 2^x, and log2 x for a CPU I'm making. So far I've got a simplified MacLaurin polynomial
for sine, which seems to produce quite a good result (8 terms --> 16 decimal place accuracy at pi/2, 16 terms --> 41 dec. place...
Re: Weird error in synthesis
I wasn't using "assign" anywhere in that module.
I don't know what the true error was, but I rewrote it to make it cleaner and the problem went away.
-- Josh
Re: Weird error in synthesis
Ah, thanks for the tip. Didn't think of that.
Anyway, now I'm onto more errors...
--
ERROR:Xst:528 - Multi-source in Unit <cpu> on signal <r<14><0>>
Sources are:
Output signal of FDE instance <r_14_0>
Signal <r<14><0>> in Unit <cpu> is assigned to GND
--...
Weird error in synthesis
Xilinx ISE 6.3i, targetting a Spartan-III 400k gate, Verilog.
I'm trying to synthesize a small CPU (I mean really small - 150 lines or so), but I'm encountering trouble with one particular section. It is supposed to place a data input byte (wire [7:0]) into a reg...
FPGA suggestions
Hi all,
I've been making my first foray into the world of logic design.
As a first project, I've designed a very simple 4-bit CPU in about 150 lines of Verilog. I simulated it and it works fine. My question is: Where do I go from here?
I know that Xilinx and Altera are the...
Re: RF locator?
To make the receiver more sensitive, would you need to have a longer antenna, some sort of amplifier, or both?
As far as the transmit signal goes, I'm thinking of something roughly like this:
[100 ms high] [some unique 8-bit value - 10 ms per bit] [100 ms high]
every few...
Re: RF locator?
Thanks for your quick and informative response!
I just found Digi-Key part # ANT-916-JJB-ST-ND. It's about 2 cm long, 912 MHz. I'm not looking for long range here, maybe 100 ft if I'm lucky. Would this be likely to work?
What kind of power source would I need? I'm...
Hi all,
I'm doing a little project - an RF transmitter and a receiver. The receiver lights up an LED to indicate what direction the transmitter is in.
I'm thinking of using the 900 MHz band (specifically 912 MHz) and using a couple of small antennas.
My problem: I don't know the faintest...
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