Code Composer Studio problem

Hi Vincent,

Sounds like your question is more related to the BSL than with CCS. i will move this to the C67x device forum. There should be more expertise with the 6713DSK BSL there and hopefully you can find the answers you seek.

Thanks

ki

Vincent,

First, which functions in c6713dskinit.c cause your program to go into an infinite loop? What is the nature of the infinite loop? In particular, in which function in c6713dskinit.c does this happen? For debug purposes, you can include c6713dskinit.c in your project and that source will replace the similar functions in the library; this will give you the ability to step into the source of the functions in that file.

Second, when you use the union, in what way does it not work? Does it work if you use a simple Uint32 variable instead?

From which example file did you start to build your program? In particular the parts where you initialize the GPIOs and Timer?

Sorry these are just questions, but we will be able to help you find the problem through the probing questions.

Regards,
RandyP

Hi Randy,

First, the file c6713dskinit.c is in my project and it falls in this infinite loop:

if (1) while(!MCBSP_xrdy(DSK6713_AIC23_DATAHANDLE));//if ready to transmit

When I call comm_intr, it follows in the function output_sample, where is the line above. I suppose the datahandle is never ready but I don't know why.

Second, it doesn't work with a simple Uint32 variable. What I am trying to do is to take an analog signal, put it in a variable that I can program a ratio with. For that, I need the Line In and the MIC inputs to work (The MIC input will be for later but I guess it will be the same way to make it work)  and the value range the input is in the program (example: If I put 3.3V in the input, what value will it have in the code).

Third, the example I use to start the code is an old code from my superior with the GPIOs and the Timer in it, no examples of analog inputs.

Thank you for replying and sorry for the late reply, I guess we live in different timezone,

Vincent

And I forgot to mention, c6713dskinit.c is included in my source file, so I could track the results. My code was linked and built with the DSP/BIOS config, but I have a similar code linked and built in a different way, using some assembly files.

Vincent,

Some of this is still confusing to me. So I will ask questions and offer any suggestions that I can, for what they are worth.

Vincent Grenier-Horth said:

my program falls in an infinite loop somewhere in the disassembly.

Vincent Grenier-Horth said:

My code was linked and built with the DSP/BIOS config, but I have a similar code linked and built in a different way, using some assembly files.

Vincent Grenier-Horth said:

the file c6713dskinit.c is in my project and it falls in this infinite loop:

if (1) while(!MCBSP_xrdy(DSK6713_AIC23_DATAHANDLE));//if ready to transmit

If you have two different projects, the while loop above would certainly be stuck in a C source loop and not in disassembly. Are you mixing me up by referring to two different implementations?

Vincent Grenier-Horth said:

When I call comm_intr, it follows in the function output_sample, where is the line above. I suppose the datahandle is never ready but I don't know why.

I do not see comm_intr in your first post, but it sounds like an interrupt service routine. You would usually not call one of those, so I am curious why you are doing that.

But the bottom line is that if you are stuck waiting for the McBSP Tx to be ready, then you have not initialized the McBSP correctly.

Vincent Grenier-Horth said:

the example I use to start the code is an old code from my superior with the GPIOs and the Timer in it, no examples of analog inputs.

The DSK6713 board supplier, and some DSP authors, offer example programs for the DSK6713 that will demonstrate how to use the various peripherals. Your superior may have one of those that you can start from, or you can go to the board manufacturer's website to download some examples. Or search this forum and even the TI Wiki Pages for some examples.

It sounds like you started from an example that works for GPIOs and Timers, and added your own code for the McBSP. And the McBSP part does not work. You (or your designee) can dig through every register in the McBSP and in the board components and learn the details of the functions being called to figure out what is wrong with the way you wrote it, or you can start from a working example. I recommend the working example, and I know there have been people discussing using the McBSP for audio input and output on this forum.

Vincent Grenier-Horth said:

I need the Line In and the MIC inputs to work

I am not sure if both can work simultaneously. Perhaps you only need one or the other at any one time? The DSK's Tech Ref and schematics will help you with this.

Vincent Grenier-Horth said:

and the value range the input is in the program (example: If I put 3.3V in the input, what value will it have in the code).

The DSK's Tech Ref and schematics and the datasheets for the ADC/DAC components will help you with this. I usually just start with a small voltage and test it to see what the result is, but the scientific way is better.

Regards,
RandyP

Vincent Grenier-Horth said:

sorry for the late reply, I guess we live in different timezone,

In the 19th and early 20th centuries, it was said that "the sun never sets on the British Empire". That may be true today for the TI E2E Forums. We have users and TIers from everywhere that high-tech electronic engineering is being done. I am just in the boring Central US time zone, but you can tell I am not very good at following the clock.

Hi Randy,

I may have be confusing in my last message, I'll try to clear up those interrogations.

First, the program is trapped in the C code, I assumed it was in the disassembly because when I ran my code step-by-step, it directed me straight in the disassembly afetr passing through the line.

Second, about the comm_intr, I played a lot with the codes and it isn't there because I must have erased it. it was with the other init functions. it is a interrupt service routine.  My supervisor told me it is important to use this function. My work is only to make a part of the code, the supervisor will take over after the problem is solved, because I'm just a trainee.

Third, I tried to use other working codes, but I always got errors of undefined symbols and other problems that I find weird. I include the same headers in the code, I do not see if they have other files they put in their source files, but I can't seem to find one that works with my setup(I use a DSP/BIOS configuration to build my projects and also take an already existing project with assembly files).

Fourth, I can just take the left and right line of the Line In analog input to make my project work. I learned I could do that if I can get it to work.

Fifth, I'll give the DSK's Tech Ref a read about that.

Thanks for the help and I hope this clears up things for you

Vincent

Vincent,

You need to start from a working example. If you can get one of the working examples to work on your board, then you will know that you can succeed in your project. You can then start moving code from the working example to your GPIO/Timer code or start moving code from your GPIO/Timer code to the working code. Then your problems are related to the compiler and linker instead of the details of the peripheral that are giving you big problems.

You may also benefit from our online training materials. Please go to the TI Wiki Pages and search for "c6713 workshop" (no quotes). There is an archived workshop that includes student guide material and labs with solutions.

Regards,
RandyP

Hi Randy, its been a few days,

I read the student guide and tried some solution programs and I found it to be useful, thank you for refering me to the documentation. I learned a few things  but something came up today. I made an example code work (I think) on the C6713 DSK. Its a very basic code, you must have already seen it before, here it is:

//Loop_intr.c Loop program using interrupt, output=input
//Comm routines and support files included in C6xdskinit.c
#include "dsk6713.h"
#include "dsk6713_aic23.h" //codec-dsk support file
#define DSK6713_AIC23_INPUT_MIC 0x0015
#define DSK6713_AIC23_INPUT_LINE 0x0011
Uint32 fs=DSK6713_AIC23_FREQ_8KHZ; //set sampling rate
Uint16 inputsource=DSK6713_AIC23_INPUT_LINE;   
int sample_data=0;
void c_int11()         //interrupt service routine
{
   sample_data = input_left_sample(); //input data
   output_left_sample(sample_data);   //output data
}

void main()
{
  comm_intr();                   //init DSK, codec, McBSP
 
  while(1);                       //infinite loop
}

Here is the situation, the code is used to take an input and direct it to the output. But, it doesn't process DC voltage. Only signals like a sine waves, square waves, triangular waves, etc... can get to the output. While using the watch window, sample_data only varies when the input varies. When there a DC voltage, sample_data stay around 0. Basically, it means that when you change the voltage, sample_data changes to high values(in a random-like pattern) and comes back near 0 when you stop changing the input voltage, even when you have 2-3V at the input. Also, putting a sine wave with a DC voltage offset in the output will result in the same wave without the offset and the end.

This is my question : Is there a way to make the Line In input react to DC voltage, or it is set that its only signals like sine wave that gets processed?

If there is, any documentations or tips on the subject would be greatly appreciated.

I hope I wasn't too confusing.

Regards,

Vincent

Hi,

I think you are right, I read the datasheet and I could say the same thing. Well, with this my project is over, I finished the code I was supposed to do. Many thanks to you guys on the forum, it was really helpful.

Regards,

Vincent