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Page 3 of 13

 

Page 53

import gpiod
chip = gpiod.Chip("0")
print(chip.label())
print(chip.name())
print(chip.num_lines())
chip.close()
 
change 0 to 4 for a Pi 5

Page 57

import gpiod

chip = gpiod.Chip("0")
line = chip.get_line(4)

line.request(consumer="myprog.py", type=gpiod.LINE_REQ_DIR_OUT, default_vals=[0])
while(True):
    line.set_value(1)
    line.set_value(0)
 
change 0 to 4 for a Pi 5
 

Page 57

import gpiod

chip = gpiod.Chip("0")
lines = chip.get_lines([4, 17])

lines.request(consumer="myprog.py", type=gpiod.LINE_REQ_DIR_OUT, default_vals=[0, 1])
while(True):
    lines.set_values([1, 0])
    lines.set_values([0, 1])
 

Remember the need to change the chip number to "4" for a Pi 5.

Page 59

import gpiod
from time import sleep, time_ns

chip = gpiod.Chip("0")
line = chip.get_line(4)

line.request(consumer="resistor.py", type=gpiod.LINE_REQ_DIR_IN)
sleep(0.010)
line.release()

line.request(consumer="resistor.py", type=gpiod.LINE_REQ_DIR_OUT, default_vals=[0])
sleep(0.010)
line.release()

line.request(consumer="resistor.py", type=gpiod.LINE_REQ_DIR_IN)
t = time_ns()
while(line.get_value() == 0):
    pass
print((time_ns()-t)/1000)

 

Remember the need to change the chip number to "4" for a Pi 5.