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Add PWM test, Minor optimizations, Swap Relay + PWM assignment

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This commit is contained in:
jonny 2025-01-30 11:08:18 +01:00
parent 1be9545cd1
commit cd0ebd8891
4 changed files with 106 additions and 19 deletions
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15
rpi-scripts/examples/pass_through_inputs_to_outputs.py
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@ -3,10 +3,11 @@ import sys
import time
import RPi.GPIO as GPIO
# Add the parent directory to the module search path
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
# Import pin assignments and custom libraries
# Add the parent directory to the module search path
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
from interface_board_pins import GPIO_DIGITAL_INPUTS # Input GPIO mapping
from interface_board_pins import ( # Shift register pin assignment
GPIO_SHIFT_REG_DATA,
@ -15,15 +16,21 @@ from interface_board_pins import ( # Shift register pin assignment
)
from interface_board_libs.shift_register import ShiftRegister # Custom shift register class
# Initialize GPIO for digital inputs
GPIO.setmode(GPIO.BCM)
for pin in GPIO_DIGITAL_INPUTS.values():
print(f"Configuring GPIO pin {pin} as input")
GPIO.setup(pin, GPIO.IN)
# Initialize shift register
sr = ShiftRegister(GPIO_SHIFT_REG_DATA, GPIO_SHIFT_REG_LATCH, GPIO_SHIFT_REG_CLOCK)
# Main loop: Read inputs and write to shift register
print("\nStarting passthrough mode: Digital inputs → Shift register outputs")
try:
@ -43,9 +50,9 @@ try:
# Write the final byte to the shift register
sr.write_byte(shift_register_value)
print(f"Shift Register Output: {bin(shift_register_value)}")
print(f"Shift Register Output: {format(shift_register_value, '08b')[::-1]}") # Print binary representation (mirrored, lsb first = terminal order)
time.sleep(0.5) # Small delay to prevent excessive polling
time.sleep(0.3) # Small delay to prevent excessive polling
except KeyboardInterrupt:
print("\nExiting...")

24
rpi-scripts/examples/write_digital_outputs_shift_reg.py
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@ -1,12 +1,13 @@
# Include external libraries
import os
import sys
import RPi.GPIO as GPIO
from time import sleep
# Add the parent directory to the module search path
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
# Include custom files
# Add the parent directory to the module search path
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
from interface_board_libs.shift_register import ShiftRegister # custom shift register class
from interface_board_pins import ( # pin / channel assignment
GPIO_SHIFT_REG_DATA,
@ -20,7 +21,9 @@ from interface_board_pins import ( # pin / channel assignment
# Config
COUNT_UP_TEST_ENABLED = True
COUNT_UP_TEST_ENABLED = False
DELAY_COUNT_UP = 0.008
DELAY_TOGGLE = 0.3
# Initialize the shift register
@ -29,6 +32,7 @@ sr = ShiftRegister(GPIO_SHIFT_REG_DATA, GPIO_SHIFT_REG_LATCH, GPIO_SHIFT_REG_CLO
try:
print("Writing to shift register...")
# repeatedly write to shift register
while True:
# Cycle through all combinations of pin states (write entire byte)
@ -36,10 +40,10 @@ try:
print("Writing all byte values (0-255)...")
for value in range(256):
sr.write_byte(value) # Write the current value
print(f"Output: {bin(value)}") # Print binary representation
sleep(0.01) # Delay between each byte
print(f"Output: {'{0:08b}'.format(value)}") # Print binary representation
sleep(DELAY_COUNT_UP) # Delay between each byte
sleep(1)
sleep(0.5)
sr.clear() # Clear the shift register
@ -48,17 +52,17 @@ try:
# channels 0-2 are connected to buzzer and relays:
print(f"Num {SHIFT_REG_CHANNEL_BUZZER}: Toggling buzzer...") # channel 0
sr.set_pin(SHIFT_REG_CHANNEL_BUZZER, True) # Turn buzzer ON
sleep(0.5)
sleep(DELAY_TOGGLE)
sr.set_pin(SHIFT_REG_CHANNEL_BUZZER, False) # Turn buzzer OFF
print(f"Num {SHIFT_REG_CHANNEL_RELAY1}: Toggling Relay 1...") # channel 1
sr.toggle_pin(SHIFT_REG_CHANNEL_RELAY1)
sleep(0.5)
sleep(DELAY_TOGGLE)
sr.toggle_pin(SHIFT_REG_CHANNEL_RELAY1)
print(f"Num {SHIFT_REG_CHANNEL_RELAY2}: Toggling Relay 2...") # channel 2
sr.set_pin(SHIFT_REG_CHANNEL_RELAY2, True) # Turn relay ON
sleep(0.5)
sleep(DELAY_TOGGLE)
sr.set_pin(SHIFT_REG_CHANNEL_RELAY2, False) # Turn relay OFF
@ -66,7 +70,7 @@ try:
for pin in range(3,8): # 3-7 are connected to terminal only
print(f"Num: {pin}: Toggling Terminal")
sr.set_pin(pin, True) # Set the pin HIGH
sleep(0.5)
sleep(DELAY_TOGGLE)
#print(f"Setting pin {pin} LOW.")
sr.set_pin(pin, False) # Set the pin LOW
#sleep(0.5)

76
rpi-scripts/examples/write_pwm_outputs.py Normal file
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@ -0,0 +1,76 @@
# Include external libraries
import os
import sys
import RPi.GPIO as GPIO
from time import sleep
# Include custom files
# Add the parent directory to the module search path
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
from interface_board_pins import ( # pin / channel assignment
GPIO_PWM1, # RPI_PWM0
GPIO_PWM2 # RPI_PWM0 too
)
# Config
BLINK_ONLY = False
# PWM Settings
FREQ = 1000 # PWM frequency in Hz
STEP = 2 # Step size for fading
DELAY = 0.03 # Delay between steps
try:
print("Configuring PWM pins...")
GPIO.setmode(GPIO.BCM)
GPIO.setup(GPIO_PWM1, GPIO.OUT)
GPIO.setup(GPIO_PWM2, GPIO.OUT)
if BLINK_ONLY:
while True:
print(f"PWM1 ON (GPIO {GPIO_PWM1})")
GPIO.output(GPIO_PWM1, 1)
sleep(2)
print("PWM1 OFF")
GPIO.output(GPIO_PWM1, 0)
print(f"PWM2 ON (GPIO {GPIO_PWM2})")
GPIO.output(GPIO_PWM2, 1)
sleep(2)
print("PWM2 OFF")
GPIO.output(GPIO_PWM2, 0)
# Initialize PWM on both pins
pwm1 = GPIO.PWM(GPIO_PWM1, FREQ)
pwm2 = GPIO.PWM(GPIO_PWM2, FREQ)
pwm1.start(0) # Start with 0% duty cycle
pwm2.start(100) # Start with 100% duty cycle
print("Starting PWM fade effect...")
while True:
# Fade up PWM1 and fade down PWM2
for duty in range(0, 101, STEP): # Duty cycle from 0% to 100%
pwm1.ChangeDutyCycle(duty)
pwm2.ChangeDutyCycle(100 - duty) # Opposite fade
print(f"PWM1: {duty}% | PWM2: {100 - duty}%")
sleep(DELAY)
# Fade down PWM1 and fade up PWM2
for duty in range(100, -1, -STEP): # Duty cycle from 100% to 0%
pwm1.ChangeDutyCycle(duty)
pwm2.ChangeDutyCycle(100 - duty) # Opposite fade
print(f"PWM1: {duty}% | PWM2: {100 - duty}%")
sleep(DELAY)
finally:
print("Exiting, stopping PWM and cleaning up...")
pwm1.stop()
pwm2.stop()
GPIO.cleanup() # Clean up GPIO settings

10
rpi-scripts/interface_board_pins.py
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@ -30,9 +30,9 @@ GPIO_SHIFT_REG_CLOCK = 4
# FIXME: numbering in schematic is wrong (inverse) layout / terminal order matches the shift register though (left to right -> 0-7)
# Shift Register Channel Assignments
SHIFT_REG_CHANNEL_BUZZER = 0 # Buzzer connected to shift register channel 7
SHIFT_REG_CHANNEL_RELAY1 = 1 # Relay 1 connected to shift register channel 6
SHIFT_REG_CHANNEL_RELAY2 = 2 # Relay 2 connected to shift register channel 5
SHIFT_REG_CHANNEL_BUZZER = 0 # Buzzer connected to shift register channel 0
SHIFT_REG_CHANNEL_RELAY1 = 2 # Relay 1 connected to shift register channel 2
SHIFT_REG_CHANNEL_RELAY2 = 1 # Relay 2 connected to shift register channel 1
@ -98,8 +98,8 @@ GPIO_I2C_SCL = 3
# ===================
# === PWM outputs ===
# ===================
GPIO_PWM1 = 12 # RPI_PWM0
GPIO_PWM2 = 18 # RPI_PWM0 too
GPIO_PWM1 = 18 # RPI_PWM0
GPIO_PWM2 = 12 # RPI_PWM0 too