From: Dan White <dan@whiteaudio.com>
Date: Fri, 13 Apr 2012 21:29:06 +0000 (-0500)
Subject: AtoI-specific classes and testing
X-Git-Tag: calibrations~108
X-Git-Url: http://git.whiteaudio.com/gitweb/?a=commitdiff_plain;h=89a4af13e0d29d714b9374dcbea4446307cb4ea3;p=430.git

AtoI-specific classes and testing
---

diff --git a/python-lib/mpsse-test.py b/python-lib/mpsse-test.py
new file mode 100644
index 0000000..953c4ab
--- /dev/null
+++ b/python-lib/mpsse-test.py
@@ -0,0 +1,91 @@
+#!/usr/bin/env python
+
+import time
+import struct
+
+from myhdl import bin as b
+
+import mpsse
+import usbio
+
+
+
+class AtoiSPI0(mpsse.MPSSE):
+    def __init__(self, freq):
+        super(AtoiSPI0, self).__init__()
+        self.Open(0x0403, 0x6011, mpsse.SPI0, int(freq),
+                interface=mpsse.IFACE_A)
+        self.SetCS('flash')
+
+    def SetCS(self, name):
+        """Setup the chip-select pins for a given 'name'."""
+        if name == 'flash':
+            self.context.pidle = self.context.pstop = 0x08
+            self.context.pstart = 0x00
+        elif name == 'dac':
+            self.context.pidle = self.context.pstop = 0x08
+            self.context.pstart = 0x10
+        elif name == 'adc':
+            self.context.pidle = self.context.pstop = 0x08
+            self.context.pstart = 0x20
+        elif name == 'convst':
+            self.context.pidle = self.context.pstop = 0x08
+            self.context.pstart = 0x30
+        else:
+            raise Exception, 'Unknown CS name: %s' % name
+
+
+class AtoiI2C(mpsse.MPSSE):
+    def __init__(self, freq):
+        super(AtoiI2C, self).__init__()
+        self.Open(0x0403, 0x6011, mpsse.I2C, int(freq),
+                interface=mpsse.IFACE_B)
+        
+    def _tostring(self, c):
+        r = c
+        if not isinstance(c, str):
+            if isinstance(c, (tuple, list)):
+                r = r''.join(map(chr, c))
+            else:
+                raise TypeError, 'Cannot convert type %s to raw string.' % type(c)
+        return r
+
+    def write(self, c):
+        outdata = self._tostring(c)
+
+        n = 0
+        i = len(outdata)-1
+        s = []
+        for d in outdata:
+            r = struct.unpack('>B', d)[0]
+            s.append(b(r, 8))
+            n += r << (i*8)
+            i -= 1
+        #print ' '.join(s)
+
+
+        self.Start()
+        self.Write(outdata)
+        self.Stop()
+
+    def read(self, c, n):
+        outdata = self._tostring(c)
+        self.Start()
+        self.Write(outdata)
+        r = self.Read(n)
+        self.Stop()
+        return r
+
+
+spi = AtoiSPI0(1e5)
+spi.SetLoopback(0)
+
+
+i2c = AtoiI2C(10e3)
+
+
+ibias = usbio.AD524x(i2c, 0)
+vatoi = usbio.AD524x(i2c, 2)
+v430 = usbio.AD524x(i2c, 3)
+
+