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phaser: use 125MHz refclk for jesd

This commit is contained in:
Florent Kermarrec 2016-10-07 08:59:34 +02:00
parent 4390fea437
commit b02a7234f6
2 changed files with 8 additions and 4 deletions
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10
artiq/examples/phaser/startup_kernel.py
View File

@ -1,3 +1,5 @@
from math import ceil
from artiq.experiment import *
from artiq.coredevice.ad9516_reg import *
@ -47,9 +49,11 @@ class StartupKernel(EnvExperiment):
self.ad9154.clock_write(AD9516_OUT1, 0*AD9516_OUT1_POWER_DOWN |
2*AD9516_OUT1_LVPECLDIFFERENTIAL_VOLTAGE)
# FPGA deviceclk, dclk/1
self.ad9154.clock_write(AD9516_DIVIDER_4_3, AD9516_DIVIDER_4_BYPASS_1 |
AD9516_DIVIDER_4_BYPASS_2)
# FPGA deviceclk, dclk/4
self.ad9154.clock_write(AD9516_DIVIDER_4_3, AD9516_DIVIDER_4_BYPASS_2)
self.ad9154.clock_write(AD9516_DIVIDER_0_0,
(ceil(4/2)-1)*AD9516_DIVIDER_0_HIGH_CYCLES |
(4//2-1)*AD9516_DIVIDER_0_LOW_CYCLES)
self.ad9154.clock_write(AD9516_DIVIDER_4_4, 1*AD9516_DIVIDER_4_DCCOFF)
self.ad9154.clock_write(AD9516_OUT9, 1*AD9516_OUT9_LVDS_OUTPUT_CURRENT |
2*AD9516_OUT9_LVDS_CMOS_OUTPUT_POLARITY |

2
artiq/gateware/targets/kc705.py
View File

@ -460,7 +460,7 @@ class AD9154(Module, AutoCSR):
ts = JESD204BTransportSettings(f=2, s=1, k=16, cs=1)
jesd_settings = JESD204BSettings(ps, ts, did=0x5a, bid=0x5)
jesd_linerate = 5e9
jesd_refclk_freq = 500e6
jesd_refclk_freq = 125e6
rtio_freq = 125*1000*1000
jesd_phys = [JESD204BPhyTX(
rtio_crg.refclk, jesd_refclk_freq,