forked from M-Labs/artiq
Phaser upconverter: Follow datasheet procedure for VCO calibration (close #1643)
Signed-off-by: Marius Weber <marius.weber@physics.ox.ac.uk>
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@ -323,6 +323,7 @@ class Phaser:
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delay(.2*ms)
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for data in channel.trf_mmap:
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channel.trf_write(data)
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channel.cal_trf_vco()
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delay(2*ms) # lock
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if not (self.get_sta() & (PHASER_STA_TRF0_LD << ch)):
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@ -331,6 +332,7 @@ class Phaser:
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if channel.trf_read(0) & 0x1000:
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raise ValueError("TRF R_SAT_ERR")
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delay(.1*ms)
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channel.en_trf_out()
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# enable dac tx
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self.set_cfg(clk_sel=self.clk_sel)
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@ -689,6 +691,7 @@ class PhaserChannel:
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self.phaser = phaser
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self.index = index
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self.trf_mmap = TRF372017(trf).get_mmap()
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self.oscillator = [PhaserOscillator(self, osc) for osc in range(5)]
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@kernel
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@ -891,6 +894,32 @@ class PhaserChannel:
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return self.trf_write(0x00000008 | (cnt_mux_sel << 27),
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readback=True)
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@kernel
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def cal_trf_vco(self):
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"""Start calibration of the upconverter (hardware variant) VCO.
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TRF outputs should be disabled during VCO calibration.
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"""
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self.trf_write(self.trf_mmap[1] | (1 << 31))
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@kernel
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def en_trf_out(self, rf=1, lo=0):
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"""Enable the rf/lo outputs of the upconverter (hardware variant).
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:param rf: 1 to enable RF output, 0 to disable
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:param lo: 1 to enable LO output, 0 to disable
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"""
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data = self.trf_read(0xc)
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delay(0.1 * ms)
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# set RF and LO output bits
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data = data | (1 << 12) | (1 << 13) | (1 << 14)
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# clear to enable output
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if rf == 1:
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data = data ^ (1 << 14)
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if lo == 1:
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data = data ^ ((1 << 12) | (1 << 13))
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self.trf_write(data)
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class PhaserOscillator:
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"""Phaser IQ channel oscillator (NCO/DDS).
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@ -17,7 +17,7 @@ class TRF372017:
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vco_sel = 2 # 2b
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vcosel_mode = 0
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cal_acc = 0b00 # 2b
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en_cal = 1
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en_cal = 0 # leave at 0 - calibration is performed in `Phaser.init()`
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nfrac = 0 # 25b
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@ -27,9 +27,9 @@ class TRF372017:
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pwd_vcomux = 0
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pwd_div124 = 0
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pwd_presc = 0
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pwd_out_buff = 1
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pwd_lo_div = 1
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pwd_tx_div = 0
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pwd_out_buff = 1 # leave at 1 - only enable outputs after calibration
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pwd_lo_div = 1 # leave at 1 - only enable outputs after calibration
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pwd_tx_div = 1 # leave at 1 - only enable outputs after calibration
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pwd_bb_vcm = 0
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pwd_dc_off = 0
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en_extvco = 0
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@ -84,6 +84,7 @@ class TRF372017:
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setattr(self, key, value)
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def get_mmap(self):
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"""Memory map for TRF372017"""
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mmap = []
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mmap.append(
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0x9 |
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