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phaser: n=2, m=16, sync_dly

This commit is contained in:
Robert Jördens 2020-09-16 09:19:15 +00:00
parent 9b58b712a6
commit f3b0398720
1 changed files with 16 additions and 5 deletions
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21
artiq/coredevice/phaser.py
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@ -20,7 +20,7 @@ PHASER_ADDR_SPI_DIVLEN = 0x0b
PHASER_ADDR_SPI_SEL = 0x0c
PHASER_ADDR_SPI_DATW = 0x0d
PHASER_ADDR_SPI_DATR = 0x0e
# PHASER_ADDR_RESERVED0 = 0x0f
PHASER_ADDR_SYNC_DLY = 0x0f
PHASER_ADDR_DUC0_CFG = 0x10
# PHASER_ADDR_DUC0_RESERVED0 = 0x11
PHASER_ADDR_DUC0_F = 0x12
@ -172,16 +172,17 @@ class Phaser:
self.dac_write(0x00, 0x019c) # I=2, fifo, clkdiv_sync, qmc off
self.dac_write(0x01, 0x040e) # fifo alarms, parity
self.dac_write(0x02, 0x70a2) # clk alarms, sif4, nco off, mix, mix_gain, 2s
self.dac_write(0x03, 0x6000) # coarse dac 20.6 mA
self.dac_write(0x03, 0x4000) # coarse dac 20.6 mA
self.dac_write(0x07, 0x40c1) # alarm mask
self.dac_write(0x09, 0x8000) # fifo_offset
self.dac_write(0x09, 0x4000) # fifo_offset
self.set_sync_dly(0)
self.dac_write(0x0d, 0x0000) # fmix, no cmix
self.dac_write(0x14, 0x5431) # fine nco ab
self.dac_write(0x15, 0x0323) # coarse nco ab
self.dac_write(0x16, 0x5431) # fine nco cd
self.dac_write(0x17, 0x0323) # coarse nco cd
self.dac_write(0x18, 0x2c60) # P=4, pll run, single cp, pll_ndivsync
self.dac_write(0x19, 0x8404) # M=8 N=1
self.dac_write(0x19, 0x8814) # M=16 N=2
self.dac_write(0x1a, 0xfc00) # pll_vco=63
delay(.2*ms) # slack
self.dac_write(0x1b, 0x0800) # int ref, fuse
@ -196,7 +197,7 @@ class Phaser:
delay(.1*ms)
if lvolt < 2 or lvolt > 5:
raise ValueError("DAC PLL tuning voltage out of bounds")
self.dac_write(0x20, 0x0000) # stop fifo sync
# self.dac_write(0x20, 0x0000) # stop fifo sync
self.dac_write(0x05, 0x0000) # clear alarms
delay(1*ms) # run it
alarm = self.get_sta() & 1
@ -488,6 +489,16 @@ class Phaser:
self.dac_write(0x04, 0x0000) # clear iotest_result
return errors
@kernel
def set_sync_dly(self, dly):
"""Set SYNC delay.
:param dly: DAC SYNC delay setting (0 to 7)
"""
if dly < 0 or dly > 7:
raise ValueError("SYNC delay out of bounds")
self.write8(PHASER_ADDR_SYNC_DLY, dly)
class PhaserChannel:
"""Phaser channel IQ pair.