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

rpi-scripts/examples/pass_through_inputs_to_outputs.py

@@ -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...")

rpi-scripts/examples/write_digital_outputs_shift_reg.py

@@ -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
+                print(f"Output: {'{0:08b}'.format(value)}")  # Print binary representation
-                sleep(0.01)  # Delay between each byte
+                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)

rpi-scripts/examples/write_pwm_outputs.py

@@ -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

rpi-scripts/interface_board_pins.py

@@ -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_BUZZER = 0  # Buzzer connected to shift register channel 0
-SHIFT_REG_CHANNEL_RELAY1 = 1  # Relay 1 connected to shift register channel 6
+SHIFT_REG_CHANNEL_RELAY1 = 2  # Relay 1 connected to shift register channel 2
-SHIFT_REG_CHANNEL_RELAY2 = 2  # Relay 2 connected to shift register channel 5
+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_PWM1 = 18  # RPI_PWM0
-GPIO_PWM2 = 18  # RPI_PWM0 too
+GPIO_PWM2 = 12  # RPI_PWM0 too