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phaser: debug init, systematic bring-up

This commit is contained in:
Robert Jördens 2020-09-25 20:54:59 +00:00
parent fec2f8b763
commit 2fba3cfc78
1 changed files with 24 additions and 18 deletions
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42
artiq/coredevice/phaser.py
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@ -153,13 +153,12 @@ class Phaser:
for ch, trf in enumerate([trf0, trf1])]
@kernel
def init(self):
def init(self, debug=False):
"""Initialize the board.
Verifies board and chip presence, resets components, performs
communication and configuration tests and establishes initial
conditions.
"""
board_id = self.read8(PHASER_ADDR_BOARD_ID)
if board_id != PHASER_BOARD_ID:
@ -179,12 +178,15 @@ class Phaser:
delay(.1*ms) # slack
# reset
self.set_cfg(dac_resetb=0, dac_sleep=1, att0_rstn=0, att1_rstn=0,
dac_txena=0)
self.set_cfg(dac_resetb=0, dac_sleep=1, dac_txena=0,
trf0_ps=1, trf1_ps=1,
att0_rstn=0, att1_rstn=0)
self.set_leds(0x00)
self.set_fan_mu(0)
# bring everything out of reset, keep tx off
self.set_cfg(clk_sel=self.clk_sel, dac_txena=0)
# bring dac out of reset, keep tx off
self.set_cfg(clk_sel=self.clk_sel, dac_txena=0,
trf0_ps=1, trf1_ps=1,
att0_rstn=0, att1_rstn=0)
delay(.1*ms) # slack
# TODO: crossing dac_clk (125 MHz) edges with sync_dly (0-7 ns)
@ -235,7 +237,17 @@ class Phaser:
# delay(.1*ms)
self.clear_dac_alarms()
delay(2*ms) # let it run a bit
self.check_dac_alarms()
alarms = self.get_dac_alarms()
delay(.1*ms) # slack
if alarms & ~0x0040: # ignore PLL alarms (see DS)
if debug:
print(alarms)
self.core.break_realtime()
else:
raise ValueError("DAC alarm")
# power up trfs, release att reset
self.set_cfg(clk_sel=self.clk_sel, dac_txena=0)
for ch in range(2):
channel = self.channel[ch]
@ -244,7 +256,7 @@ class Phaser:
if channel.get_att_mu() != 0x5a:
raise ValueError("attenuator test failed")
delay(.1*ms)
channel.set_att(31.5*dB)
channel.set_att_mu(0x00) # minimum attenuation
# test oscillators and DUC
for i in range(len(channel.oscillator)):
@ -289,7 +301,8 @@ class Phaser:
raise ValueError("TRF R_SAT_ERR")
delay(.1*ms)
self.set_cfg(clk_sel=self.clk_sel) # txena
# enable dac tx
self.set_cfg(clk_sel=self.clk_sel)
@kernel
def write8(self, addr, data):
@ -518,13 +531,6 @@ class Phaser:
"""
return self.dac_read(0x05)
@kernel
def check_dac_alarms(self):
alarm = self.get_dac_alarms()
delay(.1*ms) # slack
if alarm & ~0x0040: # ignore PLL alarms (see DS)
raise ValueError("DAC alarm")
@kernel
def clear_dac_alarms(self):
"""Clear DAC alarm flags."""
@ -561,9 +567,9 @@ class Phaser:
# no need to go through the alarm register,
# just read the error mask
# self.clear_dac_alarms()
alarm = self.get_dac_alarms()
alarms = self.get_dac_alarms()
delay(.1*ms) # slack
if alarm & 0x0080: # alarm_from_iotest
if alarms & 0x0080: # alarm_from_iotest
errors = self.dac_read(0x04)
delay(.1*ms) # slack
else: