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ad9910: don't reset the input divide-by-two 

suspected of causing weird PLL lock timout errors
https://freenode.irclog.whitequark.org/m-labs/2019-01-22#1548148750-1548143221;

Signed-off-by: Robert Jördens <rj@quartiq.de>
This commit is contained in:
Robert Jördens 2019-01-22 09:36:21 +00:00
parent 2174935231
commit 91e375ce6a
1 changed files with 1 additions and 1 deletions
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2
artiq/coredevice/ad9910.py
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@ -347,7 +347,7 @@ class AD9910:
# sync timing validation disable (enabled later) # sync timing validation disable (enabled later)
self.write32(_AD9910_REG_CFR2, 0x01010020) self.write32(_AD9910_REG_CFR2, 0x01010020)
self.cpld.io_update.pulse(1*us) self.cpld.io_update.pulse(1*us)
cfr3 = (0x08078000 | (self.pll_vco << 24) | cfr3 = (0x0807c000 | (self.pll_vco << 24) |
(self.pll_cp << 19) | (self.pll_en << 8) | (self.pll_cp << 19) | (self.pll_en << 8) |
(self.pll_n << 1)) (self.pll_n << 1))
self.write32(_AD9910_REG_CFR3, cfr3 | 0x400) # PFD reset self.write32(_AD9910_REG_CFR3, cfr3 | 0x400) # PFD reset