def test_start_pwm(self):
PWM.start("P9_14", 0)
files = os.listdir('/sys/devices')
ocp = '/sys/devices/'+[s for s in files if s.startswith('ocp')][0]
files = os.listdir(ocp)
pwm_test = ocp+'/'+[s for s in files if s.startswith('pwm_test_P9_14')][0]
assert os.path.exists(pwm_test)
duty = open(pwm_test + '/duty').read()
period = open(pwm_test + '/period').read()
assert int(duty) == 0
assert int(period) == 500000
PWM.cleanup()
def test_pwm_duty_cycle_invalid_value_negative(self):
PWM.start("P9_14", 0)
with pytest.raises(ValueError):
PWM.set_duty_cycle("P9_14", -1)
PWM.cleanup()
def test_pwm_duty_cycle_non_setup_key(self):
with pytest.raises(RuntimeError):
PWM.set_duty_cycle("P9_14", 100)
PWM.cleanup()
def test_pwm_duty_cycle_invalid_key(self):
with pytest.raises(ValueError):
PWM.set_duty_cycle("P9_15", 100)
PWM.cleanup()
def test_pwm_start_valid_duty_cycle_max(self):
#testing an exception isn't thrown
PWM.start("P9_14", 100)
PWM.cleanup()
def teardown_module(module):
PWM.cleanup()
def test_pwm_freq_non_setup_key(self):
with pytest.raises(ValueError):
PWM.set_frequency("P9_15", 100)
PWM.cleanup()
def test_pwm_frequency_invalid_value_string(self):
PWM.start("P9_14", 0)
with pytest.raises(TypeError):
PWM.set_frequency("P9_14", "11")
PWM.cleanup()
def test_pwm_frequency_invalid_value_negative(self):
PWM.start("P9_14", 0)
with pytest.raises(ValueError):
PWM.set_frequency("P9_14", -1)
PWM.cleanup()
def test_pwm_duty_cycle_invalid_value_string(self):
PWM.start("P9_14", 0)
with pytest.raises(TypeError):
PWM.set_duty_cycle("P9_14", "a")
PWM.cleanup()
#this will eventually be used to send sensor data back to command
s.sendall(last)
except KeyboardInterrupt:
raise
except:
s.close()
print 'CONNECTION LOST: ATTEMPTING RECONNECT -- '# + msg[1]
#loop to beginning
except socket.error, msg:
print 'Send failed: '
except KeyboardInterrupt:
raise
except socket.error, msg:
print 'Failed to create socket. Error code: ' + str(msg[0]) + ' Error message: ' + msg[1]
except KeyboardInterrupt:
print 'Closing socket...'
s.close()
print 'Shutting down PWM outputs...'
PWM.cleanup()
time.sleep(.5)
sys.exit()
# Allow use as a module or standalone script
if __name__ == "__main__":
main()