[beagleboard] Re: How do I hard-reset usb on beagle-bone with Angstrom distribution
Hey,
did you have any success with the usb hard reset issue?
Regards,
Michael
Am Freitag, 21. Juni 2013 02:17:31 UTC+2 schrieb ma...@verdigristech.com:
Hi I am using a beagle-bone A6a with angstrom linux,
we have a usbreset script compiled from here.
#include stdio.h
#include usb.h
int main(void)
{
struct usb_bus *busses;
usb_init();
usb_find_busses();
usb_find_devices();
busses = usb_get_busses();
struct usb_bus *bus;
int c, i, a;
/* ... */
for (bus = busses; bus; bus = bus-next) {
struct usb_device *dev;
int val;
usb_dev_handle *junk;
for (dev = bus-devices; dev; dev = dev-next) {
char buf[1024];
junk = usb_open ( dev );
usb_get_string_simple(junk,2,buf,1023);
if ( junk == NULL ){
printf(Can't open %p (%s)\n, dev, buf );
} else {
val = usb_reset(junk);
printf( reset %p %d (%s)\n, dev, val, buf );
}
usb_close(junk);
}
}
}
It generates output like this
[ 2422.917305] usb 1-1: reset high-speed USB device number 19 using musb-hdrc
[ 2423.080278] cdc_acm 1-1:1.0: ttyACM0: USB ACM device
Reset successful
however it is not actually successfully hard-resetting.
Does anyone know how to hard powercycle the usb host controller?
--
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