def test_xstr2float(self):
# All numbers will be 32_16
sign_bit = 32
frac_bits = 16
# Positive, integer
xstr = '00040000'
self.assertEqual(4, utility.xstr2float(xstr, frac_bits, sign_bit))
# Positive, fractional
xstr = '0004c000'
self.assertEqual(4.75, utility.xstr2float(xstr, frac_bits, sign_bit))
# Negative, integer
xstr = 'fffc0000'
self.assertEqual(-4, utility.xstr2float(xstr, frac_bits, sign_bit))
# Negative, fractional
xstr = 'fffb4000'
self.assertEqual(-4.75, utility.xstr2float(xstr, frac_bits, sign_bit))
# Zero
xstr = '0'
self.assertEqual(0, utility.xstr2float(xstr, frac_bits, sign_bit))
def plot(values, frac_bits=0, sign_bit=None):
toplot = []
for v in values:
toplot.append(xstr2float(v, frac_bits, sign_bit))
print
print 'plotting ...'
print 'x\ty'
print '----------'
for i in range(len(toplot)):
if toplot[i] != 0:
print i, '\t', toplot[i]
print '----------'
pylab.plot(toplot)
pylab.show()
