static int hw_opendev(int device_index)
{
GTimeVal cur_time;
struct sr_device_instance *sdi;
struct fx2_device *fx2;
int timediff, err;
if (!(sdi = sr_get_device_instance(device_instances, device_index)))
return SR_ERR;
fx2 = sdi->priv;
/*
* if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms
* for the FX2 to renumerate
*/
err = 0;
if (GTV_TO_MSEC(fx2->fw_updated) > 0) {
sr_info("saleae: waiting for device to reset");
/* takes at least 300ms for the FX2 to be gone from the USB bus */
g_usleep(300*1000);
timediff = 0;
while (timediff < MAX_RENUM_DELAY) {
if ((err = sl_open_device(device_index)) == SR_OK)
break;
g_usleep(100*1000);
g_get_current_time(&cur_time);
timediff = GTV_TO_MSEC(cur_time) - GTV_TO_MSEC(fx2->fw_updated);
}
sr_info("saleae: device came back after %d ms", timediff);
} else {
err = sl_open_device(device_index);
}
if (err != SR_OK) {
sr_warn("unable to open device");
return SR_ERR;
}
fx2 = sdi->priv;
err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE);
if (err != 0) {
sr_warn("Unable to claim interface: %d", err);
return SR_ERR;
}
if (fx2->cur_samplerate == 0) {
/* Samplerate hasn't been set; default to the slowest one. */
if (hw_set_configuration(device_index, SR_HWCAP_SAMPLERATE,
&supported_samplerates[0]) == SR_ERR)
return SR_ERR;
}
return SR_OK;
}
int hw_opendev(int device_index)
{
GTimeVal cur_time;
struct usb_device_instance *udi;
int timediff, err;
unsigned int cur, upd;
if(firmware_updated.tv_sec > 0)
{
/* firmware was recently uploaded */
g_get_current_time(&cur_time);
cur = cur_time.tv_sec * 1000 + cur_time.tv_usec / 1000;
upd = firmware_updated.tv_sec * 1000 + firmware_updated.tv_usec / 1000;
timediff = cur - upd;
if(timediff < FIRMWARE_RENUM_DELAY)
{
timediff = FIRMWARE_RENUM_DELAY - timediff;
g_message("waiting %d ms for device to reset", timediff);
g_usleep(timediff * 1000);
firmware_updated.tv_sec = 0;
}
}
if( !(udi = sl_open_device(device_index)) )
{
g_warning("unable to open device");
return SIGROK_NOK;
}
err = libusb_claim_interface(udi->devhdl, USB_INTERFACE);
if(err != 0)
{
g_warning("Unable to claim interface: %d", err);
return SIGROK_NOK;
}
if(cur_sample_rate == 0)
{
/* sample rate hasn't been set; default to the slowest it has */
if(hw_set_configuration(device_index, HWCAP_SAMPLERATE, &supported_sample_rates[0]) == SIGROK_NOK)
return SIGROK_NOK;
}
return SIGROK_OK;
}
