C++ (Cpp) sptr::set_master_clock_rate Examples

Example #1

File: UHDDevice.cpp Project: 5728136cs/openbts-multi-arfcn

double uhd_device::set_rates(double rate)
{
	double actual_rt, actual_clk_rt;

#if !defined(MULTICHAN) & !defined(RESAMPLE)
	// Make sure we can set the master clock rate on this device
	actual_clk_rt = usrp_dev->get_master_clock_rate();
	if (actual_clk_rt > U1_DEFAULT_CLK_RT) {
		LOG(ALERT) << "Cannot set clock rate on this device";
		LOG(ALERT) << "Please compile with host resampling support";
		return -1.0;
	}

	// Set master clock rate
	usrp_dev->set_master_clock_rate(master_clk_rt);
	actual_clk_rt = usrp_dev->get_master_clock_rate();

	if (actual_clk_rt != master_clk_rt) {
		LOG(ALERT) << "Failed to set master clock rate";
		LOG(ALERT) << "Actual clock rate " << actual_clk_rt;
		return -1.0;
	}
#endif

	// Set sample rates
	usrp_dev->set_tx_rate(rate);
	usrp_dev->set_rx_rate(rate);
	actual_rt = usrp_dev->get_tx_rate();

	if (actual_rt != rate) {
		LOG(ALERT) << "Actual sample rate differs from desired rate";
		LOG(ALERT) << actual_rt << "Hz";
		return -1.0;
	}
	if (usrp_dev->get_rx_rate() != actual_rt) {
		LOG(ALERT) << "Transmit and receive sample rates do not match";
		return -1.0;
	}

	return actual_rt;
}

Example #2

File: UHDDevice.cpp Project: Djimmer/obts

int uhd_device::set_master_clk(double clk_rate)
{
	double actual, offset, limit = 1.0;

	try {
		usrp_dev->set_master_clock_rate(clk_rate);
	} catch (const std::exception &ex) {
		LOG(ALERT) << "UHD clock rate setting failed: " << clk_rate;
		LOG(ALERT) << ex.what();
		return -1;
	}

	actual = usrp_dev->get_master_clock_rate();
	offset = fabs(clk_rate - actual);

	if (offset > limit) {
		LOG(ALERT) << "Failed to set master clock rate";
		LOG(ALERT) << "Requested clock rate " << clk_rate;
		LOG(ALERT) << "Actual clock rate " << actual;
		return -1;
	}

	return 0;
}