skylarmt/usbscale
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Updated comment documentation.

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This commit is contained in:
Eric Jiang 2011-02-14 16:25:36 -05:00
parent 8c039b082c
commit f68ac41120
1 changed files with 17 additions and 7 deletions
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24
usbscale.c
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@ -104,6 +104,10 @@ int main(void)
if (r < 0) if (r < 0)
return r; return r;
#ifdef DEBUG
libusb_set_debug(NULL, 3);
#endif
// //
// Next, we try to get a list of USB devices on this computer. // Next, we try to get a list of USB devices on this computer.
cnt = libusb_get_device_list(NULL, &devs); cnt = libusb_get_device_list(NULL, &devs);
@ -319,19 +323,25 @@ static int print_scale_data(char* dat) {
return 1; return 1;
} }
//
// find_scale
// ----------
//
// **find_scale** takes a `libusb_device\*\*` list and loop through it,
// matching each device's vendor and product IDs to the scales.h list. It
// return the first matching `libusb_device\*` or 0 if no matching device is
// found.
//
static libusb_device* find_scale(libusb_device **devs) static libusb_device* find_scale(libusb_device **devs)
{ {
#ifdef DEBUG
libusb_set_debug(NULL, 3);
#endif
int i = 0; int i = 0;
libusb_device* dev = 0; libusb_device* dev = 0;
/* //
* Loop through each usb device, and for each device, loop through the // Loop through each USB device, and for each device, loop through the
* scales list to see if it's one of our listed scales // scales list to see if it's one of our listed scales.
*/ //
while ((dev = devs[i++]) != NULL) { while ((dev = devs[i++]) != NULL) {
struct libusb_device_descriptor desc; struct libusb_device_descriptor desc;
int r = libusb_get_device_descriptor(dev, &desc); int r = libusb_get_device_descriptor(dev, &desc);