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'