Floating point math

[pedja089]

Why you need FP for trig function?
You can use lookup table and linear interpolation to get 3-4 decimal places resolution.
Melanie already done that
http://www.picbasic.co.uk/forum/show...=2873#post2873
And just found this
http://www.picbasic.co.uk/forum/cont...h-PicBasic-Pro
So I think that you can do all that in one pic.
And you can use N bith math, or FP rutines, is long isn't enough... And it must be faster to do that in one PIC, than to sent and receive data thru UART.

[Dave]

Hey Art, Being you like to work with the 16F628's you might have a look at using one of the 16F1847's to replace it. 8K of flash, 1K of ram, 256 bytes of eeprom and 32Mhz. I have replaced a few 16F628's from old projects and they work a treet...

[Art]

I did give a a lot of thought of getting it into one chip, and it would definitely be the dspic
since I already have implemented the functions I want into another program for the same chip.
This is just the first time I’ve had to do the hardware. The last one was a kit web server.

Since I want the LCD to be continually driven, and am more apt with fancy graphics with an 8 bit pic,
that’s the reason to consider the second chip.
If I was happy with a fairly static LCD display, it would be easy with the dspic alone.
The algorithms are Sunrise/set, Moonrise/Set, and Moon Illumination for a clock.