From 9e1447d104604615b0b728be2bf294bc3214771b Mon Sep 17 00:00:00 2001
From: occheung <dc@m-labs.hk>
Date: Mon, 18 Sep 2023 19:55:47 -0700
Subject: [PATCH] adc: implement standby & power-down/up

---
 artiq/coredevice/shuttler.py | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/artiq/coredevice/shuttler.py b/artiq/coredevice/shuttler.py
index 97d0ee6f5..3519103d6 100644
--- a/artiq/coredevice/shuttler.py
+++ b/artiq/coredevice/shuttler.py
@@ -228,7 +228,23 @@ class ADC:
         delay(100*us)
         adc_code = self.read24(_AD4115_REG_DATA)
         return ((adc_code / (1 << 23)) - 1) * 2.5 / 0.1
-    
+
+    @kernel
+    def standby(self):
+        # Selecting internal XO (0b00) also disables clock during standby
+        self.write16(_AD4115_REG_ADCMODE, 0x8020)
+
+    @kernel
+    def power_down(self):
+        self.write16(_AD4115_REG_ADCMODE, 0x8030)
+
+    @kernel
+    def exit_power_down(self):
+        self.reset()
+        # Although the datasheet claims 500 us reset wait time, only waiting
+        # for ~500 us can result in DOUT pin stuck in high
+        delay(2500*us)
+
     @kernel
     def calibrate(self, volts, trigger, config, samples=[-5.0, 0.0, 5.0]):
         assert len(volts) == 16