nsls2 FPM

iocBoot/iocFPM/loadnp.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+"""
+Waveform device support which reads
+from a .npy file.
+
+Intended to load test input data
+"""
+
+import numpy
+
+class Device(object):
+    def __init__(self, rec, fname):
+        if not fname:
+            return
+        print 'Load', fname,'into',rec.NAME
+        data = numpy.load(fname)
+        assert len(data.shape)==1, 'only 1D supported'
+        val = rec.field('VAL')
+        vlen = min(len(val), len(data))
+        val.getarray()[:vlen] = data[:vlen]
+        val.putarraylen(vlen)
+
+    def process(self, rec, reason=None):
+        pass
+
+build = Device