Spin Semiconductor

delay_r is the base address of your delay memory. This is a circular buffer that rolls at each sample cycle. so if you write ADC to delay_r, and read from delay_r+4000, you get a delay of 4000. If you multiply by the pot value(from 0 to 1), you get a variable delay time, from 0 to 4000 I get the ci...

The previous answer got me moving, but after some looking I could not find the answer to a couple of questions on the code given. So given the code: clr ; clear acc or delay_r*256 ; put base address of delay in acc shifted to align bits for addressing wrax reg0,0 ; save it or $4000*256 ; length of d...

Thanks a million Frank, That's so helpful, the 'or' instruction, I was looking over the instruction set trying to figure out how to load an immediate value into the Accumulator. Never occurred to me to use an or.

Thanks for all your help, think I'm up and running.
John

Thanks Frank but sorry I'm still struggling with it. I get the indirect addressing mode, I've no problem with that, and the offset stored in the ADDR_PTR register. If we had somehow stored an offset of 0x100 in the ADDR_PTR register that's the required offset, What I'm struggling with is how the cod...

There's not a lot to the 'rmpa' instruction. As the SPINAsmUsersManual.pdf states: "RMPA will fetch the indirectly addressed sample from the delay ram, multiply it by C and add the result to the previous content of ACC" There's even an example code segment in the manual: ; Crude variable d...

Frank thanks a million for your response, you got me thinking. I was assuming that my problems were a simple software issue and in one case that turned out to be the case, but your pointing the finger a Hardware got me thinking. I dug out an old dual boot laptop with an old windows partition and the...

I'm only starting out with DSP so a lot of my questions have been very basic in nature, this one is no different. I have two problems which are both linked to volume, but both come back to changing or scaling that volume. My first problem is that my guitar running through the FV-1 and a simple progr...

How embarrassing, totally misread what the problem was.

Thanks a million for taking the time to point that out Frank.

I hope user 'potul' is checking in now and again. I've been working on Hardware, so only now getting back to testing the python assembler. It installed without issue and kinda works, but doesn't like my assembley code. Specifically it doesn't like my first line: radx ADCL, 1.0 which results in: pars...

Ahhhhh Thanks a million for that. So when I saw what looked like reading twice the normal length of data was in fact two reads, the first which I was looking at the address for, in a trace, and the second for the correct address after the switch pins had all settled down. If I make a PCB I might deb...

Sorry the formatting of my table got messed up. I just had the brain wave of checking the actual Datasheet for the FV-1. I've been through it a while back and couldn't remember anything specific about the EEPROM but thought I'd best check, in case I totally missed a description. Can't find anything ...

I'm looking at the layout of the code in the EEPROM, as I was hoping to use the Python Assembler and just program my binary into an EEPROM without using the DEV board and Windows. To answer the question how to write a binary file to EEPROM I hooked up a logic probe to the I2C Interface between the F...

Thanks a million potul, that's exactly what I was looking for and undoubtedly better then what I would have implemented Thanks again that will make my Linux/Spin life easier

I previously asked about running the IDE on Linux, but this time I'm just interested in the Assembler... I've struggled with getting the IDE working on Linux, attempting both Wine and a Virtual Machine. I'd no joy so I had to resort to using an old laptop which I still had a windows partition on, so...

Thank you for that. I'll try this out, but as always there are too many projects.