Gpio error wile using GPIOtest.py

[Aditya Rastogi]

Greetings,

Well received my board yesterday. Tried to use GPIO in a small python code used library from https://github.com/Leapo/Rock64-R64.GPIO. But even the test file in it shows error.  Looking for help need to finish my college project asap.

Code:

import R64.GPIO as GPIO from time import sleep print("Testing R64.GPIO Module...") # Test Variables print("") print("Module Variables:") print("Name           Value") print("----           -----") print("GPIO.ROCK      " + str(GPIO.ROCK)) print("GPIO.BOARD     " + str(GPIO.BOARD)) print("GPIO.BCM       " + str(GPIO.BCM)) print("GPIO.OUT       " + str(GPIO.OUT)) print("GPIO.IN        " + str(GPIO.IN)) print("GPIO.HIGH      " + str(GPIO.HIGH)) print("GPIO.LOW       " + str(GPIO.LOW)) print("GPIO.PUD_UP    " + str(GPIO.PUD_UP)) print("GPIO.PUD_DOWN  " + str(GPIO.PUD_DOWN)) print("GPIO.VERSION   " + str(GPIO.VERSION)) print("GPIO.RPI_INFO  " + str(GPIO.RPI_INFO)) # Set Variables var_gpio_out = 16 var_gpio_in = 18 # GPIO Setup GPIO.setwarnings(True) GPIO.setmode(GPIO.BOARD) GPIO.setup(var_gpio_out, GPIO.OUT, initial=GPIO.HIGH)       # Set up GPIO as an output, with an initial state of HIGH GPIO.setup(var_gpio_in, GPIO.IN, pull_up_down=GPIO.PUD_UP)  # Set up GPIO as an input, pullup enabled # Test Output print("") print("Testing GPIO Input/Output:") var_gpio_state = GPIO.input(var_gpio_out)                   # Return state of GPIO print("Output State : " + str(var_gpio_state))              # Print results sleep(1) GPIO.output(var_gpio_out, GPIO.LOW)                         # Set GPIO to LOW # Test Input var_gpio_state = GPIO.input(var_gpio_in)                    # Return state of GPIO print("Input State  : " + str(var_gpio_state))              # Print results sleep(0.5) # Test interrupt print("") print("Waiting 3 seconds for interrupt...") var_interrupt = GPIO.wait_for_edge(var_gpio_in, GPIO.FALLING, timeout=3000) if var_interrupt is None:     print("Timeout!") else:     print("Detected!") # Test PWM Output p=GPIO.PWM(var_gpio_out, 60)                                # Create PWM object/instance print("") print("Testing PWM Output - DutyCycle - High Precision:") print("60Hz at 50% duty cycle for 1 second") p.start(50) sleep(1) print("60Hz at 25% duty cycle for 1 second") p.ChangeDutyCycle(25) sleep(1) print("60Hz at 10% duty cycle for 1 second") p.ChangeDutyCycle(10) sleep(1) print("60Hz at  1% duty cycle for 1 second") p.ChangeDutyCycle(1) sleep(1) p.stop() print("") print("Testing PWM Output - DutyCycle - Low Precision:") print("60Hz at 50% duty cycle for 1 second") p.start(50, pwm_precision=GPIO.LOW) sleep(1) print("60Hz at 25% duty cycle for 1 second") p.ChangeDutyCycle(25) sleep(1) print("60Hz at 10% duty cycle for 1 second") p.ChangeDutyCycle(10) sleep(1) print("60Hz at  1% duty cycle for 1 second") p.ChangeDutyCycle(1) sleep(1) p.stop() print("") print("Testing PWM Output - Frequency - Low Precision:") print("60Hz at 50% duty cycle for 1 second") p.start(50, pwm_precision=GPIO.LOW) sleep(1) print("30Hz at 50% duty cycle for 1 second") p.ChangeFrequency(30) sleep(1) print("20Hz at 50% duty cycle for 1 second") p.ChangeFrequency(20) sleep(1) print("10Hz at 50% duty cycle for 1 second") p.ChangeFrequency(10) sleep(1) p.stop() GPIO.cleanup([var_gpio_in, var_gpio_out])                   # Perform cleanup on specified GPIOs print("") print("Test Complete") ---------------------------------------------------------------------------------------------------------------------------------------------------------- ###########OUTPUT################ Testing R64.GPIO Module... Module Variables: Name           Value ----           ----- GPIO.ROCK      ROCK GPIO.BOARD     BOARD GPIO.BCM       BCM GPIO.OUT       out GPIO.IN        in GPIO.HIGH      1 GPIO.LOW       0 GPIO.PUD_UP    0 GPIO.PUD_DOWN  1 GPIO.VERSION   0.6.3 GPIO.RPI_INFO  {'P1_REVISION': 3, 'RAM': '1024M', 'REVISION': 'a22082', 'TYPE': 'Pi 3 Model B', 'PROCESSOR': 'BCM2837', 'MANUFACTURER': 'Embest'} Error: Unable to export GPIO Error: Unable to set GPIO direction Error: Unable to export GPIO Error: Unable to set GPIO direction Testing GPIO Input/Output: You must setup() the GPIO channel (BOARD 27) first Output State : None You must setup() the GPIO channel (BOARD 27) as an output first You must setup() the GPIO channel (BOARD 32) first Input State  : None Waiting 3 seconds for interrupt... You must setup() the GPIO channel (BOARD 32) as an input first Timeout! You must setup() the GPIO channel (BOARD 27) as an output first Testing PWM Output - DutyCycle - High Precision: 60Hz at 50% duty cycle for 1 second Traceback (most recent call last):  File "R64-GPIO-test.py", line 71, in <module>    p.start(50)  File "/home/rock64/camcode/R64/_GPIO.py", line 351, in start    self.pwm_calc()  File "/home/rock64/camcode/R64/_GPIO.py", line 368, in pwm_calc    self.sleep_low = (1.0 / self.freq) * ((100 - self.dutycycle) / 100.0) AttributeError: PWM instance has no attribute 'freq'