Re: Sinewaves using interrupts.
Ok, old thread of mine & hands up...short of dabbling with scalerobotics cool sinewave generation program I never actually progressed much further - but I keep coming back to this DDS issue....I reckon I can do so much cool stuff once I've mastered the art of generating sine waves under my control
Now I'm never the brightest button in the sewing box, but I do have dogged determination (rough translation "a pest")...I'll often kludge my way through without necessary understanding every part of the process - So with this in mind, I hope to start soon again on this pesky DDS melarky.
So some questions.....
all this talk of a 24 bit accumulator - how do I achieve that on a 12LF1822 with PICbasic?!!!
Would up to 4.8Khz be do-able in HPWM for the DAC aspect?
Can I really expect to get granular with setting the frequency without recourse to floating point? (I want to be able to set the frequency via another PIC by fiielding an Eusart interrupt to the DDS PIC)
There are those on the net, that have done this with other processors. The Atmel AT90S2313 seems to figure large due to the lower number of clock cycles it takes per instruction. This chap has posted a great webpage...
http://www.myplace.nu/avr/minidds/index.htm
Including code....
http://www.myplace.nu/avr/minidds/minidds.asm
for those that have a clue (rules me out), how much of an ordeal would it be to move that over to a PIC?
Is this a project where I really ought to start learning assembly?
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