#avr Logs

Nov 07 2020

07:58 AM polprog: i need to find a linear ccd though
08:32 AM mouseghost: would you solder a wire to the board directly or what?
08:34 AM rue_bed: dont you just calibrate the linearity in?
08:43 AM rue_bed: I *think* that by manipulating the multipliers, you can use the fft alg to detect *any* waveform within another
08:43 AM rue_bed: it would tell you the amplitude and offset
08:44 AM twnqx: has any of you worked with an i.mx 6 yet?
08:44 AM rue_bed: whats i.mx?
08:44 AM twnqx: an ARM series by NXP
08:44 AM rue_bed: hmm
08:45 AM twnqx: only chip i found so far with one particular feature i want
08:46 AM twnqx: but i can't find information if it's usable without external dram :P sure, it's a pretty fat CPU that can run linux, but i want to use it baremetal without external ram
09:20 AM rue_bed: polprog, if fourt was faster than four1, why is all modern FFT code based on four1 ?
09:21 AM rue_bed: I'm starting to REALLY think I should take a close look at fourt
09:23 AM rue_bed: I think, picking apart four1 that between not doing the butterfly like its done, and handling the trig calcs differently, that an fft could be done a lot faster and more efficiently
09:23 AM rue_bed: and I'm wondering if thats what fourt did
09:35 AM rue_bed: yea, he points out that fourt is long, but executes faster than any of them
09:36 AM rue_bed: ooh, I'll try to type it out over the next few days
09:36 AM rue_bed: horrid scan
09:37 AM rue_bed: maybe someone else already did...
09:41 AM rue_bed: I think I know why four1 was so popular..... source code length
09:41 AM rue_bed: fourt is a whole bunch of code
09:42 AM polprog: heh. possible
10:59 AM [1]MrMobius is now known as MrMobius
11:41 PM day_ is now known as day