diff options
Diffstat (limited to 'host/lib/usrp/common/ad9361_driver/ad9361_device.cpp')
| -rw-r--r-- | host/lib/usrp/common/ad9361_driver/ad9361_device.cpp | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp b/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp index 7e574920a..97b214d7d 100644 --- a/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp +++ b/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp @@ -135,30 +135,39 @@ void ad9361_device_t::_program_fir_filter(direction_t direction, int num_taps, b _io_iface->poke8(base + 5, reg_numtaps | 0x1A); if (direction == RX) { _io_iface->poke8(base + 5, reg_numtaps | 0x18); + /* Rx Gain, set to prevent digital overflow/saturation in filters + 0:+6dB, 1:0dB, 2:-6dB, 3:-12dB + page 35 of UG-671 */ _io_iface->poke8(base + 6, 0x02); /* Also turn on -6dB Rx gain here, to stop filter overfow.*/ } else { - _io_iface->poke8(base + 5, reg_numtaps | 0x19); /* Also turn on -6dB Tx gain here, to stop filter overfow.*/ + /* Tx Gain. bit[0]. set to prevent digital overflow/saturation in filters + 0: 0dB, 1:-6dB + page 25 of UG-671 */ + _io_iface->poke8(base + 5, reg_numtaps | 0x18); } } /* Program the RX FIR Filter. */ -void ad9361_device_t::_setup_rx_fir(size_t num_taps, boost::int32_t interpolation) +void ad9361_device_t::_setup_rx_fir(size_t num_taps, boost::int32_t decimation) { + if (not (decimation == 1 or decimation == 2 or decimation == 4)) { + throw uhd::runtime_error("[ad9361_device_t] Invalid Rx FIR decimation."); + } boost::scoped_array<boost::uint16_t> coeffs(new boost::uint16_t[num_taps]); for (size_t i = 0; i < num_taps; i++) { switch (num_taps) { case 128: - coeffs[i] = boost::uint16_t((interpolation==4) ? fir_128_x4_coeffs[i] : hb127_coeffs[i]); + coeffs[i] = boost::uint16_t((decimation==4) ? fir_128_x4_coeffs[i] : hb127_coeffs[i]); break; case 96: - coeffs[i] = boost::uint16_t((interpolation==4) ? fir_96_x4_coeffs[i] : hb95_coeffs[i]); + coeffs[i] = boost::uint16_t((decimation==4) ? fir_96_x4_coeffs[i] : hb95_coeffs[i]); break; case 64: - coeffs[i] = boost::uint16_t((interpolation==4) ? fir_64_x4_coeffs[i] : hb63_coeffs[i]); + coeffs[i] = boost::uint16_t((decimation==4) ? fir_64_x4_coeffs[i] : hb63_coeffs[i]); break; case 48: - coeffs[i] = boost::uint16_t((interpolation==4) ? fir_48_x4_coeffs[i] : hb47_coeffs[i]); + coeffs[i] = boost::uint16_t((decimation==4) ? fir_48_x4_coeffs[i] : hb47_coeffs[i]); break; default: throw uhd::runtime_error("[ad9361_device_t] Unsupported number of Rx FIR taps."); @@ -171,11 +180,17 @@ void ad9361_device_t::_setup_rx_fir(size_t num_taps, boost::int32_t interpolatio /* Program the TX FIR Filter. */ void ad9361_device_t::_setup_tx_fir(size_t num_taps, boost::int32_t interpolation) { + if (not (interpolation == 1 or interpolation == 2 or interpolation == 4)) { + throw uhd::runtime_error("[ad9361_device_t] Invalid Tx FIR interpolation."); + } + if (interpolation == 1 and num_taps > 64) { + throw uhd::runtime_error("[ad9361_device_t] Too many Tx FIR taps for interpolation value."); + } boost::scoped_array<boost::uint16_t> coeffs(new boost::uint16_t[num_taps]); for (size_t i = 0; i < num_taps; i++) { switch (num_taps) { case 128: - coeffs[i] = boost::uint16_t((interpolation==4) ? fir_128_x4_coeffs[i] : hb127_coeffs[i]); + coeffs[i] = boost::uint16_t((interpolation==4) ? fir_128_x4_coeffs[i] : hb127_coeffs[i]); break; case 96: coeffs[i] = boost::uint16_t((interpolation==4) ? fir_96_x4_coeffs[i] : hb95_coeffs[i]); |