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long long multiplication and optimization.
theusch wrote:kavrcalc says that putting 23.8609294 into a float and then bringing it back gives 23.86093. The example in the link I posted above actually uses double for...
Friday, 8 June 2012 - 19:16
long long multiplication and optimization.
clawson wrote: So that's a sub 1ppm crystal is it? The best info I can find on the module is available here: http://www.rocketnumbernine.com/2011/10/25/programming-the-ad9851-dds-...
Friday, 8 June 2012 - 18:50
long long multiplication and optimization.
clawson wrote:I'd say that's an impossible dream. The crystal that clocks your AVR is probably only good for 30ppm yet you are asking for 0.03ppm I am not sure I follow you, the...
Friday, 8 June 2012 - 18:30
long long multiplication and optimization.
Thanks for the suggestions and insight guys but among other things, I plan to use this as a VFO for a homebrew shortwave receiver so frequency needs to be in the range of 100KHz...
Friday, 8 June 2012 - 18:04
long long multiplication and optimization.
Ok, I will try to clarify. The original formula came from an arduino example I found on the net, it works just fine but then space was not an issue on a mega328 without sw usb...
Friday, 8 June 2012 - 17:40
long long multiplication and optimization.
clawson wrote:I wondered about that - thread title says "long long" but code says just "long". I presume OP is aware that unlike a PC sizeof(int) = 2, sizeof(long) = 4, sizeof(...
Friday, 8 June 2012 - 17:10
long long multiplication and optimization.
clawson wrote:pow(2,32) is surely just 4294967296ULL ? Yes, and unfortunately it produces about (if not exactly) the same amount of code as the pow function :( I also tried (1...
Friday, 8 June 2012 - 17:00
usbAsp connection. SCK with resistor in the way
Ok, it was only a question and I did explain my reasons for suspecting that. As for 'refusal' well that was perhaps a bit strong, although you have not exactly been forthcoming.
Thursday, 9 February 2012 - 00:45
usbAsp connection. SCK with resistor in the way
s_mack wrote:Anyway... I still don't know what a "punter" is or why you think its a mistake to provide end users with tools they need to achieve their goals... but thanks for the...
Wednesday, 8 February 2012 - 22:23
Homebuilt Submersible ROVs
ka7ehk wrote:Subs do not transmit VLF as far as I know. According to the wiki article I linked ELF/VLF communications are one-way only due to the infeasibly long wavelengths...
Wednesday, 8 February 2012 - 00:25
Homebuilt Submersible ROVs
Assuming the ROV is to be self-powered and entirely remote then DocJC's suggestion has the added advantage of being a means to locate the thing if it happens to get stuck and/or...
Wednesday, 8 February 2012 - 00:07
USBasp Issues please help
Trust me, listen to david.prentice, he knows what he is talking about :wink: Ok, if you must use a GUI then sinaprog is probably the best one I have tried. Either way there should...
Tuesday, 7 February 2012 - 22:34

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