Community : Discussion List - ToneCore Development Kit

Does anyone have a guitar effect written in C?

support@line6.com — Tue, 16 Apr 2013 15:22:14 GMT

Hi,

I'm trying to write something with the ToneCore SDK, and I'd like to see a working algorithm written in C because all the code i got is in Assembly.
Is C so inefficient ?

Thanks

Tonecore uber metal

support@line6.com — Fri, 10 Jun 2011 03:46:43 GMT

Good night almost six months ago , I bought a tonecore uber metal but it doesn't work , since I received the pedal didn't work, it turns on, but doesn't make any effect ,and i had problems to take it to the usa and in the shop tell to contact line 6 directly, in this month I'll be in the states so I want to know how long it takes to check the damage of my product . Thanks

M series Particle verb

support@line6.com — Sat, 02 Mar 2013 17:48:58 GMT

Hi,

I used to own an M9 effects pedal, but it was recently stolen with a lot of other gear. This has prompted me to rethink my pedal board a bit.

The only effect in really needing is the particle verb, which is unique to line 6.

Is there any way I could get this effect somehow using the tonecore pedal? It'd be much simple than buying an M5 just for the one effect!

Thanks,

Adam

FIR filter: how to use memory?

support@line6.com — Sat, 04 Jun 2011 21:45:29 GMT

Hi all!

I recently bought a TCDDK, and I'm having a bit of trouble in programming ...

My goal is to implement a FIR filter (1024 tap) for acoustic guitar simulation. I could do something like this:

0. declare 1024 variables for the data at current and previous timesteps y(n), y(n-1), y(n-2) etc

and in the program

set the accumulator to 0
write 1024 times for each i=1 to n

store input value y(i) into y(i-1)
multiply y(i)*coefficient(i) and add to accumulator

It seems a pretty bulky thing to do ... I hope there is a more elegant and effective way. I thought it could be

store all coefficient values in a 1024 table
allocate a vector with 1024 values in which to store all the input values for the current and previous timesteps

and finally multiply member by member with a repeat instruction, something like

REP #1024

mac x0,y0,a x:(i),x0 y:(i),y0

and i should increment automatically ...

Still, I haven't understood yet how to deal with memory allocation and indexing with vectors or tables ... hence my questions:

- how do I allocate a vector with a specified length?

- how do I store some given coefficients in such vector? and, for the input data, how can I save both the current input and the previous values at each timestep?

- what index should I use in order to access the data?

I hope my questions are clear, thank you in advance for your answers!

Daniele

Is Stereo Dock still being made?

support@line6.com — Wed, 26 Sep 2012 20:27:02 GMT

The site doesn't show any stereo docks... just mono. Has it been discontinued? or just out of stock?

If out of stock when will it be available again?

Thanks!

Simple Multiplication Question

support@line6.com — Thu, 07 Feb 2013 18:58:13 GMT

So I have been struggling with figuring out how to do some simple multiplication on my ToneCore DSP. I have written a timer that basically flips a single bit on a "flag" so that I either have a 1 or a 0. This is the 0th bit in the register so I assume that the number in decimal is 1 or 0. Am I wrong?

So the timer works fine. But where I run into trouble is when I try to multiply my flag times the current sample. I would think that I would either have a muted signal or the original signal depending on the state of the flag, but I listen to the output I am getting nothing out. When I output the sample to the screen (after the multiplication) it seems to either be FFFFFF or 000000 but that value doesn't coincide with the value of the flag at all (which I am also outputting to the screen).

I could make this program so that it branched and either did nothing to the sample or wrote 0’s over it depending on the value of the flag bit, but that seems like it’s incredibly inefficient compared to just multiplying it. Any thoughts?

Tutorials and examples?

support@line6.com — Fri, 30 Nov 2012 14:59:46 GMT

hi,

I'm new in the Dsp world and I'd like to write some effects with the ToneCore Kit.
I've studied some assembly and C but I'm not able to write down a complex code.

Are there any tutorials, examples that explain how to move the first steps in Dsp programming with Freescale and Line6 ToneCore Kit?

Thank You

Andrea

Building MCU code in Codewarrior v10.2

support@line6.com — Wed, 21 Nov 2012 15:42:13 GMT

Hi Folks,

This is my first post. I'm a UK based software engineer with an interest in music DSP so I thought I purchase this kit through a US based friend. So far it's been a really steep learning curve but I wanted to upload my experience of trying to build the MCU code (microcontroller only) on a PC running windows XP and see if anybody else had any tales of their experience they'd like to share. At the moment Freescale offer a special edition of Codewarrior for MCUs - v10.2. It's a bit ropey but after weeks of faffing about here's my instructions for getting the build to work:

1. Download and install Codewarrior 10.2 (special edition - free)

2. Create an empty workspace on the same drive as the installation, e.g. C:\ToneCore

3. Copy 'MCU sample code' to a directory under the workspace directory and rename MCU_sample_code. This avoids any problems with include paths.

4. Import the project following the instructions outlined here:

http://www.freescale.com/infocenter/index.jsp?topic=%2Fcom.freescale.doc.CodeWarriorProjectImporter.QuickStart%2Fdoc%2FProject_Importer_Guide.CodeWarrior_Development_Studio.html

where the MCP file is 'TCDDK User Template Rev 1.mcp'.

5. When you get to the 'Access Paths' part of the import, add an extra entry: {Compiler}\lib\HC08c\device and set 'Recursive' to true.

6. Click next, there should be only one entry: User_Template_Project.map. Else, search for the missing folders and go back to 5 to add the paths.

7. Continue to Finish, selecting the remaining defaul options.

8. At this stage, you can try a build - Project -> Clean... (selecting 'Start a build immediately'). You may be lucky and everything works fine.

9. If, like me, you weren't, right-click the project in Project Panel, select 'Edit Linked Resource Locations' and select 'Linked Resources' tab.

Likely, you'll see a list of Invalid Locations. Click 'Path Variables' and edit CW_IMPORTER_ProjectDir, replacing ${PARENT_LOC} with the actual path.

10. At this stage, you may get as far as 'No rule to make target...' referring to a path containing virtual/virtual.

Open Properties, select 'C/C++ Build -> Settings' and select 'S08 Linker -> Input'.

Edit the Parameter File entry before 'MCU sample code\...' to your correct location.

11. Rerun the build. We now get a bunch of linker errors mostly referring to main.c and IO_Map_c.obj.

This is because something called ProcessorExpert generates another copy of the same code.

Under the 'User Modules', delete the TCDDK_User_Template_Rev_1.c file (or whatever generated file contains an empty main function) and

under 'Generated Code' delete IO_Map.c.

12. Rerun the build. Hopefully this time it all worked and you have a nice new MCU_sample_code.abs.s19 file to download through the TCDDK GUI.

I'd be interested to hear from anyone who's found this useful.

Best wishes

DTFee

Delay effect

support@line6.com — Sat, 21 Apr 2012 14:03:35 GMT

Hi,

I'm trying to make a clean digital delay as a starting point for some other effects. To do this, I am trying to set up a circular buffer using modulo addressing. However, in the modulus (ie: m0, m1... m7) can have a max value of 32768, meaning I am limited to about 0.8 s of delay.

Does anyone know how to use the Address Generation Unit (AGU) with a larger modulo or perhaps stacking several modulo buffers or if there is another approach altogether? Any example code too would be great.

Thanks!

Mike

In the 56300 family manual, section 4 is about the Address Generation Unit (AGU) and 4.5.3 explains modulo addressing.

Pedal dock malfunction

support@line6.com — Tue, 17 Aug 2010 00:41:40 GMT

I have a ToneCore pedal dock that does not work properly. I actually have two ToneCore pedals one of them no longer allows the module to effect the guitar signal. I know it is the dock because I switched the modules in the two pedals. Both modules worked with one dock. Neither of the modules worked in the other dock. So, is there anything that can be done to fix the bad dock or is it trash?

Any Liqua-Flange owners out there?

support@line6.com — Tue, 01 May 2012 06:48:11 GMT

If so, can you suggest settings for Van Halen's "Unchained" sound.

Yes, I realize Eddie used the MXR and his EVH model comes pre-set with the "Unchained" sound on board...but I dont have the $200 to drop on it right now.

Thanks