Merge branch 'master' of https://dev.azure.com/PicoDevOps/TechSupport/_git/PicoSDK-Core-Examples-picosdk-python-wrappers

Author: neil.hamilton

ps2000Examples/gen_sq_wave.py

@@ -0,0 +1,29 @@
+import ctypes
+import numpy as np
+
+def gen_square(t, duty, low_thres):
+    t, w = np.asarray(t), np.asarray(duty)
+    w = np.asarray(w + (t - t))
+    t = np.asarray(t + (w - w))
+    if t.dtype.char in ['fFdD']:
+        ytype = t.dtype.char
+    else:
+        ytype = 'd'
+
+    y = np.zeros(t.shape, ytype)
+    # width must be between 0 and 1 inclusive
+    mask1 = (w > 1) | (w < 0)
+    np.place(y, mask1, np.nan)
+    # on the interval 0 to duty*2*pi the function is 1
+    tmod = np.mod(t, 2 * np.pi)
+    
+    mask2 = (32767-mask1)&(tmod<w*2*np.pi)
+    np.place(y, mask2, 32767)
+	
+	#mask2 = (32767 - mask1) & (tmod < w * 2 * np.pi)
+    #np.place(y, mask2, 32767)	
+	
+    # on the interval duty*2*pi to 2*pi function is  (pi*(w+1)-tmod) / (pi*(1-w))
+    mask3 = (1 - mask1) & (1 - mask2)
+    np.place(y, mask3, low_thres)
+    return y