How to begin in DSP

10 years 5 months ago #31 by Moreno
How to begin in DSP was created by Moreno
Hello,

I'm impressed with the pedalshield. Thank you very much for the contribution.

I would like to take part in this but I just program only mcu 8bit (avr) .

anybody can indicate me where to find information to understand what happens here. I dont know the ARM MCU. I guess that i need about arm knowledge for do something with the guitar shield.

thanks

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10 years 5 months ago #32 by Yetzederixx
Replied by Yetzederixx on topic How to begin in DSP
AVR Introduction (Hack a Day)

This isn't using AVR chips, but it is an intro to DSP and is what I'm using as the foundation for my undergrad capstone project. Real-Time DSP 2nd Edition
The following user(s) said Thank You: DrPantro

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10 years 5 months ago #34 by Moreno
Replied by Moreno on topic How to begin in DSP
Hi,

thanks for the informatiion, now i can begin!


Thanks for the book

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10 years 5 months ago - 10 years 4 months ago #38 by JR
Replied by JR on topic How to begin in DSP
I know that some "Hot to DSP" documentation looks pretty intimidating in the beginning. Specially when they start to talk about floating/fixed point, FFT or Laplace Transform.

DSP in an Arduino environment is much simpler than that, plainly speaking can be reduced to (1) read ADCs, (2) modify the read values and (3) write in the DACs. There are some basic lines here www.redcedar.com/learndsp.htm

Also www.musicdsp.org has a lot of good information in the Archive section they have a lot of effects and filters coded in C where you can inspire yourself. :)

keep it simple

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10 years 5 months ago #39 by Moreno
Replied by Moreno on topic How to begin in DSP
Hi,

I find your link very interesting and a good point to beginning. I will read today the information.

Thanks

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10 years 5 months ago #40 by Yetzederixx
Replied by Yetzederixx on topic How to begin in DSP
JR has a point. There's a lot to be said about just messing with the code to see what happens. In fact that's a lot of what I plan to do despite being a computer science/mathamatics dual major. Play around with the libraries JR has coded and change values to see what happens.

I have no concept of your coding ability, or more accurately your mathematical saviness, so that DSP book maybe for the future. Heck I barely understand half of what is going on in that book without some desperate searching on the internet, but I'm doing a research project.

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10 years 5 months ago #42 by Yetzederixx
Replied by Yetzederixx on topic How to begin in DSP
Do you have a link to the API where all these functions/objects come from? ie pmc_set_writeprotect(), ADC

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10 years 4 months ago - 10 years 4 months ago #44 by JR
Replied by JR on topic How to begin in DSP
In the Atmel site there is plenty of information about the Power Management Controller( ie pmc_set_writeprotect()):
asf.atmel.com/docs/latest/sam.drivers.us...458a39e38d17627da505

The ADCs, DACs, TCs, PMC, Atmel source codes can be found in your computer in "C:\Program Files (x86)\Arduino\hardware\arduino\sam\system\libsam\source"

keep it simple

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9 years 1 month ago #268 by JamesW45
Replied by JamesW45 on topic How to begin in DSP
Hey,

I think this thread suits my query, so here it goes;
I just recently got my hands on a Pedalshield kit. Assembly was straightforward, and the next step was the coding. I thought I would try the examples as a first port of call, and I feel like everything is as it should be, but when I try and import any of the example effects into the Arduino software, I get the message:

Verify successful
Set boot flash
CPU reset
(in red writing in the console)

There is then no effect to be heard, just the clean signal running through from the amp.

I fairly beginner in this area, however I'm trying to learn, but despite hours trying to figure out the problem, I am stumped. Could anyone help?

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9 years 1 month ago #271 by Ray
Replied by Ray on topic How to begin in DSP
Hi, yes looks that you are correctly loading the code into the DUE.
I suggest you to take the .rar file from the "How to start coding... " topic and load the delay pedal for example.

The led should light on when the effect is engaged and you should clearly hear the effect... are you sure that the stomp switch is correctly activated?

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