Spin Semiconductor

Im sorry that comment should have read "value + half ramp" or something unrelated to delay memory. I'm asking about the ramps in isolation. Not their relation to delay memory addresses. To rephrase I'm looking for the value ranges the CHO RDAL instruction adds to ACC. Are the ranges I list...

According to the coding examples article: http://www.spinsemi.com/knowledge_base/coding_examples.html#Generating_triangle_waves skp run,1 ;establish LFO on first sample cycle only wldr rmp0,10,4096 ;set values for rate and range cho rdal,rmp0 ;read LFO saw wave, accumulator value will range from 0 t...

What instruction's coefficient are you referring to here? There's no coefficients for the MULX instruction.

I have two positive counter with bipolar incrementation. The first one "A" works as intended while the other one "B" is stuck at 0Hz (no incrementation). The only difference in the codes is the value stored in 'base'. 1024 works fine while 256 does not. This seems to indicate tha...

Oh my. Thank you for this! Finally got this working. Here's a working code for anyone interested. You could probably filter the increment scaler pot for a smoother travel. equ scaler reg0 ; increment scaler POT equ counter reg1 ; pitch shift counter equ addr1 reg2 ; interpolation address 1 equ addr2...

For some reason I've had the impression that an 8bit-resolution interpolator was baked into the ADDR_PTR / RMPA function. Seeing as there are 32768 buffer positions but the value inputted to the ADDR_PTR register has 32768*256 available values. I could have swore I read this but now re-reading throu...

It's not that I need more ramps it's that I find the RMP0/1 cumbersome to work with especially due to the specific buffer size options. If I could get the ADDR_PTR/RMPA approach working it's a much more flexible solution in my opinion. I very much think it is worthwhile as I have hundreds of FV1 chi...

The instruction is there to allow bipolar incrementation ("if GEZ : ACC = ACC-1) basically performing a rollover. I'm aware the fv1 uses 2s compliment for negative numbers but I don't see how that conflicts with this implementation. That being said the general method suffers from the same artif...

I'm back at it attempting to increase the audio fidelity for non-ramp based delay interpolation (ADDR_PTR / RMPA). So far all my attempts seem to be in vain and I'm stuck wondering what exactly makes the SIN/RAMP LFO generated data sound so good and left wondering if there's more going on under the ...

Thank you! I wish that was stated in the reference manual. So creating an unconditional skip requires 2 instructions (given RUN is out of the question):

I'm having an issue with combining skip conditions. Setting the condition "NEG|GEZ" should result in a skip regardless of the value loaded into ACC. Similarly setting the condition "RUN" should yield the same result for every program cycle after the initial. I have a white noise ...

I use a lot of counters in my projects but always found working with bipolar incrementation tricky. This is probably not news to more seasoned forum members but I thought I'd share my method here. Feel really dumb that I didn't think of this sooner. Feel free to critique/improve: This should work fo...

On mobile so cumbersome to do a complete check. I think the syntax is correct but most of the constants upper range limits are wrong in the cheat sheet. All the instructions expect EXP and SOF should have upper limits of 2-LSB not 1-LSB (S1.14 and S1.9).

I have been thinking about this issue for awhile, and I think I have a slick and simple solution to the pot speed issue. This should make a pot input usable for an expression pedal, for example. All that is needed is to counteract the action of the slow lowpass filter on the pot with a shelving hig...

Thank you! Will I be safe from rounding errors when using binary representation too? Btw note then that the info on the cheat sheet is incorrect regarding Rdax. I'd really appreciate an update of that page if possible as it is a very useful tool to me. If not a priority I could do an overview and wr...