A simple timing checker for OpenSesame (paste in inline_script)

timestamp.py

from openexp.canvas import canvas

c1 = canvas(self.experiment)
c2 = canvas(self.experiment)
c3 = canvas(self.experiment)

soa = 0 # The desired SOA. 0 = fastest possible
N = 10 # Nr of repetitions
w = self.get('width')
h = self.get('height')

# Create a gray canvas for visual purposes
c1.rect(0, 0, w, h, fill=True, color='gray')

for i in range(N):

	# Show canvas 1 and 2 and remember the timestamps
	t1 = c1.show()
	self.sleep(soa)
	t2 = c2.show()

	# Print the SOA and the observed duration
	# and show it briefly
	c3.clear()
	c3.text('%s / %s ms' % (soa, t2-t1))
	c3.show()
	self.sleep(200)