def test_alreadyinuse(self):
"""Test 'already in use' warning"""
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
with open('/sys/class/gpio/export', 'wb') as f:
f.write(str(LED_PIN_BCM).encode())
time.sleep(0.2) # wait for udev to set permissions
with open('/sys/class/gpio/gpio%s/direction' % LED_PIN_BCM, 'wb') as f:
f.write(b'out')
with warnings.catch_warnings(record=True) as w:
GPIO.setup(LED_PIN, GPIO.OUT) # generate 'already in use' warning
self.assertEqual(len(w), 0) # should be no warnings
with open('/sys/class/gpio/unexport', 'wb') as f:
f.write(str(LED_PIN_BCM).encode())
GPIO.cleanup()
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(True)
with open('/sys/class/gpio/export', 'wb') as f:
f.write(str(LED_PIN_BCM).encode())
time.sleep(0.2) # wait for udev to set permissions
with open('/sys/class/gpio/gpio%s/direction' % LED_PIN_BCM, 'wb') as f:
f.write(b'out')
with warnings.catch_warnings(record=True) as w:
GPIO.setup(LED_PIN, GPIO.OUT) # generate 'already in use' warning
self.assertEqual(w[0].category, RuntimeWarning)
with open('/sys/class/gpio/unexport', 'wb') as f:
f.write(str(LED_PIN_BCM).encode())
GPIO.cleanup()
def runTest(self):
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LED_PIN, GPIO.OUT)
pwm = GPIO.PWM(LED_PIN, 50)
with self.assertRaises(RuntimeError):
pwm2 = GPIO.PWM(LED_PIN, 49)
GPIO.cleanup()
def test_cleanall(self):
GPIO.setup(LOOP_OUT, GPIO.OUT)
GPIO.setup(LED_PIN, GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
GPIO.cleanup()
GPIO.setmode(GPIO.BOARD)
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.IN)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.IN)
def runTest(self):
GPIO.setmode(GPIO.BCM)
GPIO.setup(LED_PIN_BCM, GPIO.IN)
self.assertEqual(GPIO.gpio_function(LED_PIN_BCM), GPIO.IN)
GPIO.setup(LED_PIN_BCM, GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LED_PIN_BCM), GPIO.OUT)
GPIO.cleanup()
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LED_PIN, GPIO.IN)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.IN)
GPIO.setup(LED_PIN, GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
def test_cleanone(self):
GPIO.setup(LOOP_OUT, GPIO.OUT)
GPIO.setup(LED_PIN, GPIO.OUT)
GPIO.setup(SWITCH_PIN, GPIO.IN)
GPIO.setup(LOOP_IN, GPIO.IN)
GPIO.add_event_detect(SWITCH_PIN, GPIO.FALLING)
GPIO.add_event_detect(LOOP_IN, GPIO.RISING)
time.sleep(0.2) # wait for udev to set permissions
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
self.assertEqual(GPIO.gpio_function(SWITCH_PIN), GPIO.IN)
self.assertEqual(GPIO.gpio_function(LOOP_IN), GPIO.IN)
self.assertTrue(
os.path.exists('/sys/class/gpio/gpio%s' % SWITCH_PIN_BCM))
self.assertTrue(os.path.exists('/sys/class/gpio/gpio%s' % LOOP_IN_BCM))
GPIO.cleanup(SWITCH_PIN)
time.sleep(0.2) # wait for udev to set permissions
self.assertFalse(
os.path.exists('/sys/class/gpio/gpio%s' % SWITCH_PIN_BCM))
self.assertTrue(os.path.exists('/sys/class/gpio/gpio%s' % LOOP_IN_BCM))
GPIO.cleanup(LOOP_IN)
time.sleep(0.2) # wait for udev to set permissions
self.assertFalse(
os.path.exists('/sys/class/gpio/gpio%s' % SWITCH_PIN_BCM))
self.assertFalse(os.path.exists('/sys/class/gpio/gpio%s' %
LOOP_IN_BCM))
GPIO.cleanup(LOOP_OUT)
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.IN)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
GPIO.cleanup(LED_PIN)
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.IN)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.IN)
def runTest(self):
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LED_PIN, GPIO.OUT)
pwm = GPIO.PWM(LED_PIN, 50)
pwm.start(100)
print("\nPWM tests")
response = input('Is the LED on (y/n) ? ').upper()
self.assertEqual(response, 'Y')
pwm.start(0)
response = input('Is the LED off (y/n) ? ').upper()
self.assertEqual(response, 'Y')
print("LED Brighten/fade test...")
for i in range(0, 3):
for x in range(0, 101, 5):
pwm.ChangeDutyCycle(x)
time.sleep(0.1)
for x in range(100, -1, -5):
pwm.ChangeDutyCycle(x)
time.sleep(0.1)
pwm.stop()
response = input('Did it work (y/n) ? ').upper()
self.assertEqual(response, 'Y')
GPIO.cleanup()
def test_cleanupwarning(self):
"""Test initial GPIO.cleanup() produces warning"""
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(SWITCH_PIN, GPIO.IN)
with warnings.catch_warnings(record=True) as w:
GPIO.cleanup()
self.assertEqual(len(w), 0) # no warnings
GPIO.cleanup()
self.assertEqual(len(w), 0) # no warnings
GPIO.setwarnings(True)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(SWITCH_PIN, GPIO.IN)
with warnings.catch_warnings(record=True) as w:
GPIO.cleanup()
self.assertEqual(len(w), 0) # no warnings
GPIO.cleanup()
self.assertEqual(w[0].category, RuntimeWarning) # a warning
def test_cleanlist(self):
GPIO.setup(LOOP_OUT, GPIO.OUT)
GPIO.setup(LED_PIN, GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
GPIO.cleanup([LOOP_OUT])
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.IN)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
GPIO.cleanup([LED_PIN])
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.IN)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.IN)
GPIO.setup(LOOP_OUT, GPIO.OUT)
GPIO.setup(LED_PIN, GPIO.OUT)
GPIO.cleanup([LOOP_OUT, LED_PIN])
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.IN)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.IN)
def tearDown(self):
GPIO.cleanup()
def runTest(self):
# Test mode not set (BOARD or BCM) exception
with self.assertRaises(RuntimeError) as e:
GPIO.setup(LED_PIN, GPIO.OUT)
self.assertEqual(
str(e.exception),
'Please set pin numbering mode using GPIO.setmode(GPIO.BOARD) or GPIO.setmode(GPIO.BCM)'
)
# Test trying to change mode after it has been set
GPIO.setmode(GPIO.BCM)
with self.assertRaises(ValueError) as e:
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LED_PIN_BCM, GPIO.IN)
GPIO.cleanup()
# Test setting an invalid mode
with self.assertRaises(ValueError):
GPIO.setmode(666)
# Test getmode()
self.assertEqual(GPIO.getmode(), None)
GPIO.setmode(GPIO.BCM)
self.assertEqual(GPIO.getmode(), GPIO.BCM)
GPIO.setup(LED_PIN_BCM, GPIO.IN)
GPIO.cleanup()
GPIO.setmode(GPIO.BOARD)
self.assertEqual(GPIO.getmode(), GPIO.BOARD)
# Test not set as OUTPUT message
GPIO.setmode(GPIO.BOARD)
with self.assertRaises(RuntimeError) as e:
GPIO.output(LED_PIN, GPIO.HIGH)
self.assertEqual(str(e.exception),
'The GPIO channel has not been set up as an OUTPUT')
# Test setup(..., pull_up_down=GPIO.HIGH) raises exception
GPIO.setmode(GPIO.BOARD)
with self.assertRaises(ValueError):
GPIO.setup(LED_PIN, GPIO.IN, pull_up_down=GPIO.HIGH)
# Test not valid on a raspi exception
GPIO.setmode(GPIO.BOARD)
with self.assertRaises(ValueError) as e:
GPIO.setup(GND_PIN, GPIO.OUT)
self.assertEqual(str(e.exception),
'The channel sent is invalid on a Raspberry Pi')
# Test 'already in use' warning
GPIO.setmode(GPIO.BOARD)
with open('/sys/class/gpio/export', 'wb') as f:
f.write(str(LED_PIN_BCM).encode())
time.sleep(0.2) # wait for udev to set permissions
with open('/sys/class/gpio/gpio%s/direction' % LED_PIN_BCM, 'wb') as f:
f.write(b'out')
time.sleep(0.2)
with warnings.catch_warnings(record=True) as w:
GPIO.setup(LED_PIN, GPIO.OUT) # generate 'already in use' warning
self.assertEqual(w[0].category, RuntimeWarning)
with open('/sys/class/gpio/unexport', 'wb') as f:
f.write(str(LED_PIN_BCM).encode())
GPIO.cleanup()
# test initial value of high reads back as high
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LED_PIN, GPIO.OUT, initial=GPIO.HIGH)
self.assertEqual(GPIO.input(LED_PIN), GPIO.HIGH)
GPIO.cleanup()
# test initial value of low reads back as low
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LED_PIN, GPIO.OUT, initial=GPIO.LOW)
self.assertEqual(GPIO.input(LED_PIN), GPIO.LOW)
GPIO.cleanup()
# test pull up/down works
GPIO.setmode(GPIO.BOARD)
for i in range(1000):
GPIO.setup(NC_PIN, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
time.sleep(0.001)
self.assertEqual(GPIO.input(NC_PIN), GPIO.LOW)
GPIO.setup(NC_PIN, GPIO.IN, pull_up_down=GPIO.PUD_UP)
time.sleep(0.001)
self.assertEqual(GPIO.input(NC_PIN), GPIO.HIGH)
GPIO.cleanup()
# test setup of a list of channels
GPIO.setmode(GPIO.BOARD)
GPIO.setup([LED_PIN, LOOP_OUT], GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.OUT)
GPIO.cleanup()
GPIO.setmode(GPIO.BOARD)
with self.assertRaises(ValueError) as e:
GPIO.setup([LED_PIN, GND_PIN], GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
self.assertEqual(str(e.exception),
'The channel sent is invalid on a Raspberry Pi')
GPIO.cleanup()
# test setup of a tuple of channels
GPIO.setmode(GPIO.BOARD)
GPIO.setup((LED_PIN, LOOP_OUT), GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LED_PIN), GPIO.OUT)
self.assertEqual(GPIO.gpio_function(LOOP_OUT), GPIO.OUT)
GPIO.cleanup()
# test warning when using pull up/down on i2c channels
GPIO.setmode(GPIO.BOARD)
if GPIO.RPI_INFO['P1_REVISION'] == 0: # compute module
pass # test not vailid
else: # revision 1, 2 or A+/B+
with warnings.catch_warnings(record=True) as w:
GPIO.setup(3, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
self.assertEqual(w[0].category, RuntimeWarning)
with warnings.catch_warnings(record=True) as w:
GPIO.setup(5, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
self.assertEqual(w[0].category, RuntimeWarning)
GPIO.cleanup()
# test non integer channel
GPIO.setmode(GPIO.BOARD)
with self.assertRaises(ValueError):
GPIO.setup('d', GPIO.OUT)
with self.assertRaises(ValueError):
GPIO.setup(('d', LED_PIN), GPIO.OUT)
# test setting pull_up_down on an output
GPIO.setmode(GPIO.BOARD)
with self.assertRaises(ValueError):
GPIO.setup(LOOP_OUT, GPIO.OUT, pull_up_down=GPIO.PUD_DOWN)
# test setting initial on an input
GPIO.setmode(GPIO.BOARD)
with self.assertRaises(ValueError):
GPIO.setup(LOOP_IN, GPIO.IN, initial=GPIO.LOW)
pinRef = GPIO.PWM(LED_PIN, 50) # create new PWM instance
while True:
pinRef.start(10) # update PWM value
time.sleep(0.05)
pinRef.stop()
GPIO.output(LED_PIN, 0)
time.sleep(0.05)
count = count + 1
print count
def issue_94(cycles):
# led flickers. Bug = LED stays off at around cycle 400
pwm = GPIO.PWM(LED_PIN, 1)
for i in xrange(cycles):
print(i)
pwm.ChangeFrequency(25)
pwm.start(50)
time.sleep(1)
pwm.stop()
if __name__ == '__main__':
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LED_PIN, GPIO.OUT)
try:
# issue_94(1000)
issue_154()
finally:
GPIO.cleanup()
