diff options
| -rw-r--r-- | mpm/python/usrp_mpm/cores/tdc_sync.py | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mpm/python/usrp_mpm/cores/tdc_sync.py b/mpm/python/usrp_mpm/cores/tdc_sync.py index 6b3cdd686..6ce579e16 100644 --- a/mpm/python/usrp_mpm/cores/tdc_sync.py +++ b/mpm/python/usrp_mpm/cores/tdc_sync.py @@ -98,6 +98,7 @@ class ClockSynchronizer(object): ): self._iface = regs_iface self.log = get_logger("Sync-{}".format(slot_idx)) + self.slot_idx = slot_idx self.peek32 = lambda addr: self._iface.peek32(addr + offset) self.poke32 = lambda addr, data: self._iface.poke32(addr + offset, data) self.lmk = lmk @@ -226,7 +227,13 @@ class ClockSynchronizer(object): # TEMP CODE for homogenous rate sync only! Heterogenous rate sync requires an # identical target value for all devices. target = 1.0/self.ref_clk_freq + (1.0/self.radio_clk_freq)*3.5 - self.target_values = [target,] + # The radio clock traces on the motherboard are 69 ps longer for Daughterboard B + # than Daughterboard A. We want both of these clocks to align at the converters + # on each board, so adjust the target value for DB B. This is an N3xx series + # peculiarity and will not apply to other motherboards. + trace_delay_offset = {0: 0.0e-12, + 1: 69.0e-12}[self.slot_idx] + self.target_values = [target + trace_delay_offset,] # Run the initial value through the oracle to determine the adjustments to make. coarse_steps_required, dac_word_delta, distance_to_target = self.oracle( |