moved scope_lecroy to bernina repo

tools/scope_lecroy.py

@@ -0,0 +1,38 @@
+import numpy as np
+from matplotlib import pylab as plt
+
+
+def readTraceTextfile(fina, numbers=None):
+    if numbers is not None:
+        d = [readTraceTextfile(fina % number) for number in numbers]
+    else:
+        d = np.loadtxt(fina, skiprows=5, delimiter=",")
+    return d
+
+
+def getRiseTime(t, s, lims=[0.1, 0.9]):
+    lims = np.asarray(lims)
+    t = np.asarray(t)
+    s = np.asarray(s)
+    sel = t > 0
+    mxind = np.min((np.diff(s[sel]) < 0).nonzero()[0])
+    mxind = sel.nonzero()[0][mxind]
+    sel = t <= 0
+    mnind = np.max((np.diff(s[sel]) < 0).nonzero()[0])
+    mnind = sel.nonzero()[0][mnind] + 1
+    crosspty = lims * (s[mxind] - s[mnind]) + s[mnind]
+    crossptx = np.interp(crosspty, s[mnind : mxind + 1], t[mnind : mxind + 1])
+    return float(np.round(np.diff(crossptx), decimals=13)), [crossptx, crosspty]
+
+
+def plotTrace(fina="./scope2_testdata_2017-02-21/C2Trace00003txt"):
+    t, s = readTraceTextfile(fina).T
+    rt, crossers = getRiseTime(t, s)
+    ax = plt.gca()
+    ax.plot(t, s, ".-", label="rise time = %3g (fwhm)" % rt)
+    ax.plot(crossers[0], crossers[1], "xr")
+    ax.set_xlabel("Time / s")
+    ax.set_ylabel("Amplitude / V")
+
+
+