Trying to get the libpru stuff to work but it won't compile because I don't
have libsupc++. How do I get that on beaglebone using the angstrom distro?
On Saturday, May 24, 2014 3:23:32 AM UTC-5, Rafael Vega wrote:
>
>
> I need to read all 7 analog pins in the BBB every 5 milliseconds. I'm
> doing so with the following C code:
>
> void main(){
> char value_str[7];
> long int value_int = 0;
>
> FILE* f0 = fopen("/sys/bus/iio/devices/iio:device0/in_voltage0_raw", "r");
>
> while(1){
> fread(&value_str, 6, 6, f0);
> value_int = strtol(value_str,NULL,0);
> printf("0 %li\n", value_int);
> fflush(stdout);
>
> usleep(5000);
> rewind(f0);
> }
>
> Hoever, the cpu usage goes up really high (20%). Is there any way to read
> the analog inputs differently so that it doesn't use as much CPU? Someone
> suggested "DMA" but I'm completely lost on that regard...
>
> Any help will be appreciated.
>
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