UHD: Initial LimeSDR support.
Only EDGE mode is currently supported. Traditional 1 SPS Rx / 4 SPS Tx
mode requires different sampling rates which is not currently working.
RF performance is also sub-optimal and requires more tuning.
diff --git a/Transceiver52M/UHDDevice.cpp b/Transceiver52M/UHDDevice.cpp
index af9fc98..e6a5326 100644
--- a/Transceiver52M/UHDDevice.cpp
+++ b/Transceiver52M/UHDDevice.cpp
@@ -37,10 +37,12 @@
#define B2XX_CLK_RT 26e6
#define B2XX_MCBTS_CLK_RT 3.2e6
#define E1XX_CLK_RT 52e6
+#define LIMESDR_CLK_RT (GSMRATE*32)
#define B100_BASE_RT 400000
#define USRP2_BASE_RT 390625
#define USRP_TX_AMPL 0.3
#define UMTRX_TX_AMPL 0.7
+#define LIMESDR_TX_AMPL 0.3
#define SAMPLE_BUF_SZ (1 << 20)
/*
@@ -67,6 +69,7 @@
E3XX,
X3XX,
UMTRX,
+ LIMESDR,
NUM_USRP_TYPES,
};
@@ -124,6 +127,7 @@
{ B200, 4, 4, B2XX_TIMING_4_4SPS, "B200/B210 4 SPS" },
{ B210, 4, 4, B2XX_TIMING_4_4SPS, "B200/B210 4 SPS" },
{ UMTRX, 4, 4, 5.1503e-5, "UmTRX 4 SPS" },
+ { LIMESDR, 4, 4, 16.5/GSMRATE, "STREAM/LimeSDR (4 SPS TX/RX)" },
};
#define NUM_UHD_OFFSETS (sizeof(uhd_offsets)/sizeof(uhd_offsets[0]))
@@ -178,6 +182,7 @@
case E1XX:
case E3XX:
case UMTRX:
+ case LIMESDR:
return GSMRATE * sps;
default:
break;
@@ -563,6 +568,10 @@
if (set_master_clk(B2XX_MCBTS_CLK_RT) < 0)
return -1;
}
+ else if (dev_type == LIMESDR) {
+ if (set_master_clk(LIMESDR_CLK_RT) < 0)
+ return -1;
+ }
// Set sample rates
@@ -662,7 +671,7 @@
std::string mboard_str, dev_str;
uhd::property_tree::sptr prop_tree;
size_t usrp1_str, usrp2_str, e100_str, e110_str, e310_str, e3xx_str,
- b100_str, b200_str, b210_str, x300_str, x310_str, umtrx_str;
+ b100_str, b200_str, b210_str, x300_str, x310_str, umtrx_str, limesdr_str;
prop_tree = usrp_dev->get_device()->get_tree();
dev_str = prop_tree->access<std::string>("/name").get();
@@ -680,6 +689,8 @@
x300_str = mboard_str.find("X300");
x310_str = mboard_str.find("X310");
umtrx_str = dev_str.find("UmTRX");
+ // LimeSDR is based on STREAM board, so it's advertized as such
+ limesdr_str = dev_str.find("STREAM");
if (usrp1_str != std::string::npos) {
LOG(ALERT) << "USRP1 is not supported using the UHD driver";
@@ -719,6 +730,9 @@
} else if (umtrx_str != std::string::npos) {
tx_window = TX_WINDOW_FIXED;
dev_type = UMTRX;
+ } else if (limesdr_str != std::string::npos) {
+ tx_window = TX_WINDOW_USRP1;
+ dev_type = LIMESDR;
} else {
LOG(ALERT) << "Unknown UHD device type "
<< dev_str << " " << mboard_str;
@@ -837,6 +851,11 @@
if (iface != DIVERSITY)
usrp_dev->set_rx_bandwidth(500*1000*2, i);
}
+ } else if (dev_type == LIMESDR) {
+ for (size_t i = 0; i < chans; i++) {
+ usrp_dev->set_tx_bandwidth(5e6, i);
+ usrp_dev->set_rx_bandwidth(5e6, i);
+ }
}
/* Create TX and RX streamers */
@@ -888,6 +907,7 @@
case B210:
case E1XX:
case E3XX:
+ case LIMESDR:
default:
break;
}
@@ -1346,6 +1366,8 @@
double uhd_device::fullScaleInputValue()
{
+ if (dev_type == LIMESDR)
+ return (double) 2047 * LIMESDR_TX_AMPL;
if (dev_type == UMTRX)
return (double) SHRT_MAX * UMTRX_TX_AMPL;
else
@@ -1354,6 +1376,7 @@
double uhd_device::fullScaleOutputValue()
{
+ if (dev_type == LIMESDR) return (double) 2047;
return (double) SHRT_MAX;
}