phaser: tweaks

artiq/coredevice/dac34h84.py

@@ -32,7 +32,7 @@ class DAC34H84:
     revbus = 0
     twos = 1
 
-    coarse_dac = 0xa  # 20.6 mA, 0-15
+    coarse_dac = 9  # 18.75 mA, 0-15
     sif_txenable = 0
 
     mask_alarm_from_zerochk = 0

artiq/coredevice/phaser.py

@@ -119,6 +119,7 @@ class Phaser:
     :param core_device: Core device name (default: "core")
     :param miso_delay: Fastlink MISO signal delay to account for cable
         and buffer round trip. Tuning this might be automated later.
+    :param clk_sel: Select the external SMA clock input (1 or 0)
     :param dac: DAC34H84 DAC settings as a dictionary.
     :param trf0: Channel 0 TRF372017 quadrature upconverter settings as a
         dictionary.
@@ -134,8 +135,8 @@ class Phaser:
     kernel_invariants = {"core", "channel_base", "t_frame", "miso_delay",
                          "dac_mmap"}
 
-    def __init__(self, dmgr, channel_base, miso_delay=1, core_device="core",
-                 dac=None, trf0=None, trf1=None):
+    def __init__(self, dmgr, channel_base, miso_delay=1, clk_sel=0,
+                 dac=None, trf0=None, trf1=None, core_device="core"):
         self.channel_base = channel_base
         self.core = dmgr.get(core_device)
         # TODO: auto-align miso-delay in phy
@@ -144,6 +145,7 @@ class Phaser:
         # self.core.seconds_to_mu(10*8*4*ns)  # unfortunately this returns 319
         assert self.core.ref_period == 1*ns
         self.t_frame = 10*8*4
+        self.clk_sel = clk_sel
 
         self.dac_mmap = DAC34H84(dac).get_mmap()
 
@@ -151,14 +153,13 @@ class Phaser:
                         for ch, trf in enumerate([trf0, trf1])]
 
     @kernel
-    def init(self, clk_sel=0):
+    def init(self):
         """Initialize the board.
 
         Verifies board and chip presence, resets components, performs
         communication and configuration tests and establishes initial
         conditions.
 
-        :param clk_sel: Select the external SMA clock input (1 or 0)
         """
         board_id = self.read8(PHASER_ADDR_BOARD_ID)
         if board_id != PHASER_BOARD_ID:
@@ -167,7 +168,7 @@ class Phaser:
 
         hw_rev = self.read8(PHASER_ADDR_HW_REV)
         delay(.1*ms)  # slack
-        has_upconverter = hw_rev & PHASER_HW_REV_VARIANT
+        is_baseband = hw_rev & PHASER_HW_REV_VARIANT
 
         gw_rev = self.read8(PHASER_ADDR_GW_REV)
         delay(.1*ms)  # slack
@@ -183,7 +184,7 @@ class Phaser:
         self.set_leds(0x00)
         self.set_fan_mu(0)
         # bring everything out of reset, keep tx off
-        self.set_cfg(clk_sel=clk_sel, dac_txena=0)
+        self.set_cfg(clk_sel=self.clk_sel, dac_txena=0)
 
         # TODO: crossing dac_clk (125 MHz) edges with sync_dly (0-7 ns)
         # should change the optimal fifo_offset by 4
@@ -269,7 +270,7 @@ class Phaser:
                     abs(data_i - data_q) > 2):
                 raise ValueError("DUC+oscillator phase/amplitude test failed")
 
-            if has_upconverter:
+            if not is_baseband:
                 for data in channel.trf_mmap:
                     channel.trf_write(data)
                     delay(.1*ms)
@@ -279,7 +280,7 @@ class Phaser:
                 if not lock_detect:
                     raise ValueError("TRF quadrature upconverter lock failure")
 
-        self.set_cfg(clk_sel=clk_sel)  # txena
+        self.set_cfg(clk_sel=self.clk_sel)  # txena
 
     @kernel
     def write8(self, addr, data):

artiq/coredevice/trf372017.py

@@ -12,7 +12,7 @@ class TRF372017:
     cal_clk_sel = 12  # /16, 4b
 
     ndiv = 420  # 16b
-    pll_div_sel = 0b01  # /1, 2b
+    pll_div_sel = 0  # /1, 2b
     prsc_sel = 1  # 8/9
     vco_sel = 2  # 2b
     vcosel_mode = 0
@@ -106,7 +106,7 @@ class TRF372017:
             (self.en_extvco << 17) | (self.en_isource << 18) |
             (self.ld_ana_prec << 19) | (self.cp_tristate << 21) |
             (self.speedup << 23) | (self.ld_dig_prec << 24) |
-            (self.en_dith << 25) | (self.mod_ord << 27) |
+            (self.en_dith << 25) | (self.mod_ord << 26) |
             (self.dith_sel << 28) | (self.del_sd_clk << 29) |
             (self.en_frac << 31))
         mmap.append(