Rathin, on a side note, I did get the pru's working on the kernel Im using
now which is:
debian@beaglebone:~$ uname -a
Linux beaglebone 4.1.9-bone-rt-r16 #1 Thu Oct 1 06:19:41 UTC 2015 armv7l
GNU/Linux
The pru example code seems to work fine too . . .
debian@beaglebone:~/am335x_pru_package/pru_sw/example_apps/bin$ sudo
./PRU_memAcc_DDR_sharedRAM
INFO: Starting PRU_memAcc_DDR_sharedRAM example.
INFO: Initializing example.
INFO: Executing example.
INFO: Waiting for HALT command.
INFO: PRU completed transfer.
Example executed succesfully.
But man, lot's of jumping through hoops to get to here. I had to piece
together from all over the web, so you can bet once I'm ready I will make a
blog post on it. If for no one else, for myself. I still want to write a
simplified "hello world" example. Blinking USR0 using the PRU . . . After
that, then onto using the on chip ADC.
On Sat, Oct 3, 2015 at 5:49 PM, William Hermans <[email protected]> wrote:
> *4) I tried with while(1) and it ran perfectly. Now I will try changing to
>> continuous mode as well as the no of ADC in to the program and will report
>> back to you..!! *
>>
>> *Thanks for the kick start, It is of immense help and yes I have
>> understood since the beginning that Google is our BEST friend when working
>> on something new...!! though my results are not as accurate as ur's but
>> working on it.. :-)*
>>
>> *Once again thanks.. will post back my new code, soon.*
>
>
> If you get continuous mode working I'd be interested in seeing the code.
> Might even be able to optimize it some for you ;) But I know someone on
> another forum who is interested in continuous mode. I told him that I am
> more interested in getting the PRU's involved, but might get around to it
> someday. I know compared to PRU + ADC it will be slow. *But* if you can get
> continuous mode working from sysfs, you only need one open(), and close()
> call for the lifetime of the application for each file path. Which is to
> say that open(), and close() will no longer have an impact on the
> application run speed. Then you only need worry about OS latency, and the
> efficiency of your code . . .
>
> You know, a couple friends from different countries, and I have proven
> that google results vary from country to country. So maybe your results are
> skewed based on your locale some ? There is a way you can specify which
> server google uses when you search, but I forget the details. Well, aside
> from using a web proxy ;) Have fun !
>
> On Sat, Oct 3, 2015 at 1:43 PM, Rathin Dholakia <[email protected]>
> wrote:
>
>> Dear TJF,
>>
>> Sorry to bug you with a silly question, I thought being a binary it must
>> have some specific encoding rel. to library hence I asked it. I didnt knew
>> it was lack of knowledge. I am sorry...!!
>>
>> I Have figured out the way to read binary (code pasted bellow for
>> others;) but I have a doubt in it that I have lot of Zeros & negative
>> readings as well
>> Is it because of my decoding error or is it the samples themselves
>> missing.
>>
>> Thanks a ton..!!
>>
>> #include<stdio.h>
>> int main()
>> {
>> FILE *fp = NULL;
>>
>> short result[100];
>> int i;
>>
>> fp=fopen("output.0", "w+");
>> rewind(fp);
>> if(fp != NULL)
>> {
>> fread(result, sizeof(short), 100 /*# of samples*/, fp);
>> }
>> else
>> return 1;
>>
>> printf("Result\n");
>> for (i = 0; i < 100; i++)
>> printf("%d = %d\n", i, (int)result[i]);
>>
>> fclose(fp);
>> return 0;
>> }
>>
>>
>>
>> --
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>
>
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