From 1e4bccae20f72f3b18dea86204ad0a0c06845b17 Mon Sep 17 00:00:00 2001
From: Robert Jordens <rj@m-labs.hk>
Date: Wed, 2 Mar 2016 00:12:01 +0100
Subject: [PATCH] ad53xx: add

---
 artiq/coredevice/ad53xx.py | 71 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 artiq/coredevice/ad53xx.py

diff --git a/artiq/coredevice/ad53xx.py b/artiq/coredevice/ad53xx.py
new file mode 100644
index 000000000..1f6984108
--- /dev/null
+++ b/artiq/coredevice/ad53xx.py
@@ -0,0 +1,71 @@
+from artiq.language.core import (kernel, portable, delay, delay_mu, int)
+from artiq.language.units import ns
+from artiq.coredevice import spi
+
+
+_AD53xx_SPI_CONFIG = (0*spi.SPI_OFFLINE | 0*spi.SPI_CS_POLARITY |
+                      0*spi.SPI_CLK_POLARITY | 0*spi.SPI_CLK_PHASE |
+                      0*spi.SPI_LSB_FIRST | 0*spi.SPI_HALF_DUPLEX)
+
+_AD53xx_MODE_WRITE_X1 = 3 << 22
+_AD53xx_MODE_WRITE_C = 2 << 22
+_AD53xx_MODE_WRITE_M = 1 << 22
+_AD53xx_MODE_SPECIAL = 0 << 22
+
+_AD53xx_GROUP = portable(lambda g: ((g + 1) << 19))
+_AD53xx_GROUP_ALL = 0 << 19
+_AD53xx_GROUP_01234 = 6 << 19
+_AD53xx_GROUP_1234 = 7 << 19
+_AD53xx_CHANNEL_ALL = 0 << 16
+_AD53xx_CHANNEL = portable(lambda g: g << 16)
+
+_AD53xx_SPECIAL_NOP = 0 << 16
+_AD53xx_SPECIAL_CONTROL = 1 << 16
+_AD53xx_SPECIAL_OFS0 = 2 << 16
+_AD53xx_SPECIAL_OFS1 = 3 << 16
+_AD53xx_SPECIAL_AB_SELECT = portable(lambda i: (i + 6) << 16)
+_AD53xx_SPECIAL_AB_SELECT_ALL = 11 << 16
+
+_AD53xx_READ_X1A = portable(lambda ch: (0x00 | (ch + 8)) << 7)
+_AD53xx_READ_X1B = portable(lambda ch: (0x40 | (ch + 8)) << 7)
+_AD53xx_READ_C = portable(lambda ch: (0x80 | (ch + 8)) << 7)
+_AD53xx_READ_M = portable(lambda ch: (0xc0 | (ch + 8)) << 7)
+_AD53xx_READ_CONTROL = 0x101 << 7
+_AD53xx_READ_OFS0 = 0x102 << 7
+_AD53xx_READ_OFS1 = 0x103 << 7
+_AD53xx_READ_AB_SELECT = portable(lambda i: (0x100 + (i + 6)) << 7)
+
+
+class AD53xx:
+    def __init__(self, dmgr, spi_bus, ldac=None,
+                 chip_select=0, write_div=4, read_div=6):
+        self.core = dmgr.get("core")
+        self.bus = dmgr.get(spi_bus)
+        # if ldac is not None:
+        ldac = dmgr.get(ldac)
+        self.ldac = ldac
+        self.chip_select = chip_select
+        self.write_div = write_div
+        self.read_div = read_div
+
+    @kernel
+    def bus_setup(self):
+        self.bus.set_config_mu(_AD53xx_SPI_CONFIG, self.write_div,
+                               self.read_div)
+        self.bus.set_xfer(self.chip_select, 24, 0)
+
+    @kernel
+    def _channel_address(self, channel=0):
+        return int((channel + 8) << 16)
+
+    @kernel
+    def write_x1(self, channel=0, value=0):
+        ch = self._channel_address(channel)
+        self.bus.write(_AD53xx_MODE_WRITE_X1 | ch | value)
+        delay_mu(int(self.bus.xfer_period_mu + self.bus.write_period_mu))
+
+    @kernel
+    def load(self):
+        self.ldac.off()
+        delay(20*ns)
+        self.ldac.on()