From 0b3b07a7da67ca532b77b92e0e81ebdf1b64de33 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert=20J=C3=B6rdens?= <rj@quartiq.de>
Date: Thu, 25 Oct 2018 16:02:54 +0000
Subject: [PATCH] ad9910: add power down method
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Signed-off-by: Robert Jördens <rj@quartiq.de>
---
 artiq/coredevice/ad9910.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/artiq/coredevice/ad9910.py b/artiq/coredevice/ad9910.py
index c7e1b49a1..442b40210 100644
--- a/artiq/coredevice/ad9910.py
+++ b/artiq/coredevice/ad9910.py
@@ -165,6 +165,16 @@ class AD9910:
                 return
         raise ValueError("PLL lock timeout")
 
+    @kernel
+    def power_down(self, bits=0b1111):
+        """Power down DDS.
+
+        :param bits: power down bits, see datasheet
+        """
+        self.write32(_AD9910_REG_CFR1, 0x00000002 | (bits << 4))
+        delay(1*us)
+        self.cpld.io_update.pulse(1*us)
+
     @kernel
     def set_mu(self, ftw, pow=0, asf=0x3fff):
         """Set profile 0 data in machine units.