Spin Semiconductor

Once again - thank you very much Frank. We where taught over and over again that we would need to scale the level up and down and even how to calculate if a routine needs it - use it or loose it - so it was your comment that brought it back :D Halv the inputs ( * -0.5 ) and multiplying back up ( * -...

Thank you for your reply Frank. I posted a reply yesterday that apparently disappeared into thin air … :( …. oh well I try again. You are right - I forgot that interpolating is used in down and not up sampling :oops: As far as I remember (I was taught DSP programming in 96 and didn't use it for 19 y...

Thank you Frank and happy New Year. I added the following to the code : ; ------ UpSample Routine -------------------- RDAX ADCL , 1 ; Get New Sample WRA UpSample , 0.5 ; Save for later and Multply with 0.5 RDA UpSample + 1 , 0.5 ; Add 0.5* Previous Sample WRA UpSample + 2 , 0 ; Save the Interpolate...

Hi All. I have a problem, where I need a moveable LowPass filter, where it is f0 that is moved between 500Hz. and as close as possible to the full 15KHz. bandwith (32.768Hz. Clock). I tried a simple BiQuad filter I partly pinched from SpinCAD (thanks Larry). : equ Frequency REG4 ; Tone (Low Pass) Fr...

Thank you Frank - that is what I do now - I just hoped that I could get away with having only one source file and a conditional assembly ….

I got a piece of hardware using the FV-1 that has 3 different programs where the only difference i a single coefficient in the code between the 3. So my question ; is it possible to use something like a macro so I only have to have one source code that results in 3 programs - but only one code to ma...

Strange - I had the same problem on two different FV-1's for days last week - as described above. So I decided to do an experiment instead of waiting for replies - just to see the relationship between the "original" Ramp and the calculated Triangle and modified the code to : CHO RDAL, RMP1...

I use the following code to generate a Triangle Wave : CHO RDAL , RMP1 ; Read LFO 1 value SOF 1.999 , -0.5 ; Adjust to -0.5 to 0.5 ABSA ; Make sure we have a positive Triangle Wave SOF 1 , -0.25 ; Adjust to -0.25 to +0.25 WRAX DACR , 0 ; write to DAC R This gives me a Triangle Wave with two strange ...

OK - this solved the "zipper noise" from modulation.

This unfortunately uncovered another problem, that I better start another thread about.

I thought of a possibility : OR $7FFF00 ; Set max MULX DelayLength SOF 0.984375 , 0.015625 ; Delay time (Pointer)24-975mS. RDAX Modulation , 1 ; Add modulation to pointer 0-8mS. WRAX ADDR_PTR , 1 ; write to delay address pointer WRAX OldPointerL , 1 ; Save to next time ---- a few other things here, ...

I've written a new delay program that has multiple address pointer rutines depending on user input and it all works nicely except for "zipper noise" and I can see that this is solved by using the value @ [address] + value @ [address +1] - fine, but I can't easily figure how to add 1 to the...

Hi I know that I can write directly to Program Zero (Address = 000h) - the program does that by default, and I know that I can use the "Open Project Dialog" function to load finished programs to the places I want ...!... But how do I "persuade" the program save to another program...

Zeners are NOT alike and almost all the old models are sh!.e ..! Datasheets are unfortunately not very thrust worthy around and below the zener point - not the same as the reverse leakage current .... If we are talking about those with a max. of 500mW. - I exclusively use BZX79Cxx as the leaded and ...