Core Electronics Team, Hello
If there is nothing already, I believe there is a need for such a thing as what I am calling a Starter-HAT.
I circuit board with preloaded LED and Buttons to allow a new to Raspberry PI user to get instantly hands onto coding without first fully understanding electronics.
The simple circuit board I have put together is shown in the short photo
below.
There is one LED for each of 23 GPIO and one Button.
The following Pythn3 code will cycle the LED in either GPIO sequence number, Clockwise or Anticlockwise. The Button, using edger detect interrupts the programme.
"""
#file gpio_trainer.py
The idea here is to Create a "Starter HAT" an easy access to GPIO for the Beginner.
The circuit board utilizes 23 of the available 28 GPIO as OUTPUTS and 1 as an INPUT.
The outputs drive one LED of a 16 DIL Bar Graph LED module. The are 4 modules in total.
The 1 Input is connected to GPIO 04
"""
import RPi.GPIO as GPIO
import time
import sys
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
#configure the Pi i/o
led_pin = 0
switch = 4
set_type = "0"
global hold_set
menu_set = 0
GPIO.setup(switch, GPIO.IN, pull_up_down=GPIO.PUD_UP)
# GPIO.add_event_detect(switch, GPIO.RISING, callback=switch_callback)
gpio_clockwise = ([14, 15, 18, 23, 24, 25, 8, 7, 12, 16, 20, 21, 26, 19, 13, 6, 5, 11, 9, 10, 22, 27, 17, 50])
gpio_anticlock = ([17, 27, 22, 10, 9, 11, 5, 6, 13, 19, 26, 21, 20, 16, 12, 7, 8, 25, 24, 23, 18, 15, 14, 50])
# Callback called when switch is pressed.
def switch_callback(channel):
print('Switch pressed, exiting.')
GPIO.cleanup()
sys.exit(0)
GPIO.add_event_detect(switch, GPIO.RISING, callback=switch_callback)
"""
# function to select INPUT or OUTPUT
Following is a loop function that sets the required GPIO's as OUTPUTS
"""
def set_out(led_pin): # set io as output
GPIO.setup(led_pin, GPIO.OUT)
def on_off(led_pin, state): # set LED ON and OFF
GPIO.output(led_pin, state)
def gpio_type(set_type): #set as INPUT or OUTPUT
led_pin = 0
while led_pin < 28:
if led_pin == 0 or led_pin == 1 or led_pin == 2 or led_pin == 3 or led_pin == 4:
#print(led_pin)
led_pin += 1
elif set_type == 1 or set_type == 2 or set_type == 3:
set_out(led_pin)
#print(led_pin, end=" ")
led_pin += 1
"""
This function rotates the LED Outputs either Clockwise or Anti-Clockwise.
"""
def gpio_clock_anticlock(dir): # select clockwise or anti-clock
i = 0
if dir == 2:
led_pin = gpio_clockwise[i]
elif dir == 3:
led_pin = gpio_anticlock[i]
while led_pin != 50: # i < len(gpio_clockwise) + 1:
#i = 0
if dir == 2: # rotate LED Clockwise
state = int(True)
on_off(led_pin, state) # GPIO.setup(led_pin, GPIO.OUT)
time.sleep(0.025)
state = int(False)
on_off(led_pin, state)
time.sleep(0.025)
i += 1
#print(led_pin)
led_pin = gpio_clockwise[i]
elif dir == 3: # rotate LED Anti-Clock
state = int(True)
on_off(led_pin, state) # GPIO.setup(led_pin, GPIO.OUT)
time.sleep(0.025)
state = int(False)
on_off(led_pin, state)
time.sleep(0.025)
i += 1
#print(led_pin)
led_pin = gpio_anticlock[i]
"""
This function rotates the GPIO Outputs in the Number Sequence of the GPIO.
"""
def gpio_set(): #set as True ON or False OFF
led_pin = 0
while led_pin < 28:
if led_pin == 0 or led_pin == 1 or led_pin == 2 or led_pin == 3 or led_pin == 4:
led_pin += 1
else:
state = int(True)
on_off(led_pin, state) # GPIO.setup(led_pin, GPIO.OUT)
time.sleep(0.025)
state = int(False)
on_off(led_pin, state)
time.sleep(0.025)
led_pin += 1
#print(led_pin)
"""
Main Loop to set the LED sequence.
Above the 1 edge-triggered Input when pressed interrupts the operation.
"""
try:
while True:
if menu_set == 0: #:set_type = 0
menu_set = 11 #hold_set = (" ")
print("Set GPIO as OUTPUT and turn LED ON/Off in BCM number sequence press 1 ")
print("Set GPIO as OUTPUT and turn LED ON/OFF in Rotate Clockwise sequence press 2 ")
print("Set GPIO as OUTPUT and turn LED ON/OFF in Rotate Anti-Clockwise sequence press 3 ")
set_type = (input("Press 1, 2, or 3 .. ")) #select GPIO type
else:
#gpio_type(set_type)
#while True:
#if menu_set == "0":
#print("xxx")
#GPIO.cleanup()
#sys.exit(0)
if set_type == "1":
menu_set = 0
hold_set = set_type
set_type = int(set_type)
gpio_type(set_type)
time.sleep(0.01)
gpio_set()
print(hold_set, "xxx")
set_type = hold_set
elif set_type == "2" or set_type == "3":
menu_set = 0
hold_set = set_type
set_type = int(set_type)
gpio_type(set_type)
time.sleep(0.01)
dir = set_type
gpio_clock_anticlock(dir)
set_type = hold_set
else:
menu_set = 0
print()
print("input is not correct")
print()
print()
print()
finally:
print("Cleaning up")
GPIO.cleanup()
My apologies for the code insertion.
Maybe Core as a Builder could put something together along these lines.
Bryan
2024-10-03T14:00:00Z
