add sinegen script

scripts/sinegen.py

@@ -0,0 +1,38 @@
+import string
+import math
+import sys
+
+M_PI = 3.14159265358979323846
+
+
+
+def sine(val,r,scale,stepping):
+    global M_PI,flip
+    re = int(math.sin(val*(M_PI*scale)/r)*r) + r
+    re = re & 0xff
+    re = re * stepping
+    return re
+
+
+def main():
+    cnt = 64
+    stepping = 1
+    upper = 0xff
+
+    s = "#define PWM_SINE_MAX %i\nuint8_t pwm_sine_table[] = {\n" % cnt
+    for i in range(0,cnt):
+        if i > 0 and i%16==0:
+            s+="\n"
+        s +="0x%02x,"  % sine(i,upper/2,(float(upper)/cnt),stepping)
+    s=s[:-1]
+    s+="\n};\n"
+    print s
+
+main()
+
+
+
+
+
+
+