changed ttyAMA1 to ttyAMA3, updated firmware flashing

2LabsToGo-Eco-Firmware/2labstogo_programmer.conf

@@ -0,0 +1,10 @@
+programmer
+    id = "2LabsToGo";
+    desc = "Use the Linux GPIO interface to bitbang GPIO lines (Bookworm compatible)";
+    type = "linuxgpio";
+    prog_modes = PM_ISP;
+    reset = 6;
+    sck = 11;
+    sdo = 10;
+    sdi = 9;
+;

2LabsToGo-Eco-Firmware/README.md

@@ -17,12 +17,60 @@ The built firmware.hex file is then saved in 2LabsToGo-Eco-Firmware/2LabsToGo-Ec
 <b>However, building the firmware is only required, if the Marlin codes have been modified.</b><a>
 
 A pre-built firmware file (firmware_2LabsToGo-Eco.hex) is available in this folder, including files for setting the fuses and flashing the bootloader.
-To flash the firmware from the Raspberry Pi onto the Arduino chip of the 2LabsToGo-Eco mainboard, 
-use the bash script <b>flash_firmware.sh</b>.
+
+## Flashing Firmware on Raspberry Pi OS Bookworm
+
+The firmware flashing process has been updated to work with Raspberry Pi OS Bookworm Lite, which uses the new `gpiod` interface instead of the legacy `sysfs` GPIO.
+
+### First-time Setup (Bookworm)
+
+Before flashing firmware for the first time on Bookworm, run the setup script:
+
+```bash
+sudo bash setup_bookworm.sh
+```
+
+This script will:
+- Install required packages (avrdude with gpiod support)
+- Configure GPIO access permissions
+- Set up the system for firmware flashing
+
+**Note:** After running the setup script, you may need to log out and back in for group permission changes to take effect.
+
+### Flashing the Firmware
+
+To flash the firmware from the Raspberry Pi onto the Arduino chip of the 2LabsToGo-Eco mainboard, use the bash script:
+
+```bash
+sudo bash flash_firmware.sh
+```
+
+### Compatibility Notes
+
+- **Bookworm (recommended)**: Uses `linuxgpiod` driver - fully supported
+- **Bullseye and older**: Uses `linuxgpio` driver - legacy support
+
+If you're using an older Raspberry Pi OS version, the original configuration will still work.
 
 For more details on flashing, consult the 2LabsToGo-Eco Assembly guide 
 (see reference 1 in this [README](https://github.com/OfficeChromatography/2LabsToGo-Eco/blob/main/README.md)).
 
 ## After firmware update
 <b>After a firmware update, both PID tunings must be performed again to safe the settings in the firmware.<br>
-Consult the 2LabsToGo-Eco Assembly guide.</b>
+Consult the 2LabsToGo-Eco Assembly guide.</b>
+
+## Troubleshooting
+
+### GPIO Access Issues
+If you encounter "Permission denied" errors:
+1. Ensure you're running with `sudo`
+2. Check that `/dev/gpiochip0` exists: `ls -l /dev/gpiochip*`
+3. Verify GPIO group membership: `groups`
+
+### avrdude Version Issues
+If flashing fails, check your avrdude version:
+```bash
+avrdude -? 2>&1 | grep version
+```
+
+Version 7.0 or higher is required for Bookworm compatibility. The setup script will attempt to install a compatible version.

2LabsToGo-Eco-Firmware/avrdude_gpio.conf

@@ -15833,11 +15833,11 @@ part parent    ".avr8x_mega"
     ;
 ;
 
-# Linux GPIO configuration for avrdude.
+# Linux GPIO configuration for avrdude
 # Change the lines below to the GPIO pins connected to the AVR.
 programmer
 id = "2LabsToGo";
-desc = "Use the Linux sysfs interface to bitbang GPIO lines";
+desc = "Use the Linux GPIO interface to bitbang GPIO lines (Bookworm compatible)";
 type = "linuxgpio";
 reset = 6;
 sck = 11;

2LabsToGo-Eco-Firmware/flash_firmware.sh

@@ -1,10 +1,79 @@
 #!/bin/bash
-#read -p "Enter your username: " user
-#echo "You entered $user"
-
-#sudo avrdude -p atmega2560 -C avrdude_gpio.conf -c 2LabsToGo -v -U lfuse:w:0xff:m -U hfuse:w:0xd8:m -U efuse:w:0xfd:m
-sudo avrdude -p atmega2560 -C avrdude_gpio.conf -c 2LabsToGo -v -U lfuse:w:0xff:m -U hfuse:w:0xd8:m -U efuse:w:0xfd:m
-#sudo avrdude -p atmega2560 -C avrdude_gpio.conf -c 2LabsToGo -v -U flash:w:ArduinoISP.ino.hex:i
-sudo avrdude -p atmega2560 -C avrdude_gpio.conf -c 2LabsToGo -v -U flash:w:ArduinoISP.ino.hex:i
-#sudo avrdude -p atmega2560 -C avrdude_gpio.conf -c 2LabsToGo -v -U flash:w:firmware_2LabsToGo.hex:i
-sudo avrdude -p atmega2560 -C avrdude_gpio.conf -c 2LabsToGo -v -U flash:w:firmware_2LabsToGo-Eco.hex:i
+
+# Check if running as root
+if [ "$EUID" -ne 0 ]; then 
+    echo "Please run as root (use sudo)"
+    exit 1
+fi
+
+# Get the directory where this script is located
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CONFIG_FILE="$SCRIPT_DIR/2labstogo_programmer.conf"
+
+# Use the correct avrdude path
+AVRDUDE="/usr/local/bin/avrdude"
+
+# GPIO chip device (typically gpiochip0 on Raspberry Pi)
+GPIO_DEVICE="/dev/gpiochip0"
+
+# Check if config file exists
+if [ ! -f "$CONFIG_FILE" ]; then
+    echo "Error: Configuration file not found at $CONFIG_FILE"
+    exit 1
+fi
+
+# Check if GPIO device exists
+if [ ! -e "$GPIO_DEVICE" ]; then
+    echo "Error: GPIO device $GPIO_DEVICE not found"
+    exit 1
+fi
+
+# Check if avrdude is installed
+if [ ! -f "$AVRDUDE" ]; then
+    echo "avrdude is not installed at $AVRDUDE. Please run setup_bookworm.sh first"
+    exit 1
+fi
+
+# Check if linuxgpio programmer is available
+if ! "$AVRDUDE" -c ?type 2>&1 | grep -q "linuxgpio"; then
+    echo "Error: avrdude doesn't support linuxgpio programmer"
+    echo "Please run: sudo bash setup_bookworm.sh"
+    exit 1
+fi
+
+echo "Using avrdude: $AVRDUDE"
+echo "Using avrdude version: $("$AVRDUDE" -? 2>&1 | grep -oP 'version \K[0-9]+\.[0-9]+' | head -1)"
+echo "Using config file: $CONFIG_FILE"
+echo "Using GPIO device: $GPIO_DEVICE"
+
+# Verify the programmer is defined in the config
+if ! grep -q 'id = "2LabsToGo"' "$CONFIG_FILE"; then
+    echo "Error: Programmer '2LabsToGo' not found in config file"
+    exit 1
+fi
+
+echo "Setting fuses..."
+"$AVRDUDE" -p atmega2560 -C "+$CONFIG_FILE" -c 2LabsToGo -i 50 -P "$GPIO_DEVICE" -v -U lfuse:w:0xff:m -U hfuse:w:0xd8:m -U efuse:w:0xfd:m
+
+if [ $? -ne 0 ]; then
+    echo "Error: Failed to set fuses"
+    exit 1
+fi
+
+echo "Flashing bootloader..."
+"$AVRDUDE" -p atmega2560 -C "+$CONFIG_FILE" -c 2LabsToGo -i 50 -P "$GPIO_DEVICE" -v -U flash:w:ArduinoISP.ino.hex:i
+
+if [ $? -ne 0 ]; then
+    echo "Error: Failed to flash bootloader"
+    exit 1
+fi
+
+echo "Flashing firmware..."
+"$AVRDUDE" -p atmega2560 -C "+$CONFIG_FILE" -c 2LabsToGo -i 50 -P "$GPIO_DEVICE" -v -U flash:w:firmware_2LabsToGo-Eco.hex:i
+
+if [ $? -eq 0 ]; then
+    echo "Firmware flashed successfully!"
+else
+    echo "Error: Failed to flash firmware"
+    exit 1
+fi

2LabsToGo-Eco-Firmware/setup_bookworm.sh

@@ -0,0 +1,128 @@
+#!/bin/bash
+
+# Setup script for Raspberry Pi OS Bookworm Lite compatibility
+# This script prepares the system for firmware flashing
+
+set -e
+
+echo "=== 2LabsToGo-Eco Firmware Setup for Bookworm ==="
+
+# Check if running as root
+if [ "$EUID" -ne 0 ]; then
+    echo "Please run as root: sudo bash setup_bookworm.sh"
+    exit 1
+fi
+
+# Update package list
+echo "Updating package list..."
+apt update
+
+# Install required packages
+echo "Installing required packages..."
+apt install -y libgpiod2 gpiod libgpiod-dev
+
+# Check if avrdude supports linuxgpiod
+echo "Checking avrdude version and linuxgpiod support..."
+if command -v avrdude &> /dev/null && avrdude -c ? 2>&1 | grep -q "linuxgpio"; then
+    echo "✓ avrdude with linuxgpiod support detected"
+else
+    echo "Building avrdude from source with gpiod support..."
+
+    # Install build dependencies
+    apt install -y build-essential git cmake libelf-dev libusb-dev \
+        libhidapi-dev libftdi1-dev libreadline-dev flex bison
+
+    # Remove old avrdude if installed
+    apt remove -y avrdude || true
+
+    echo "Cloning avrdude repository..."
+    cd /tmp
+    if [ -d "avrdude" ]; then
+        rm -rf avrdude
+    fi
+
+    git clone https://github.com/avrdudes/avrdude.git
+    cd avrdude
+    git checkout v8.1
+
+    echo "Building avrdude..."
+    mkdir -p build
+    cd build
+    cmake -D CMAKE_BUILD_TYPE=Release \
+          -D HAVE_LINUXGPIO=1 \
+          -D CMAKE_INSTALL_PREFIX=/usr/local \
+          ..
+
+    # Check if cmake found libgpiod
+    if grep -q "HAVE_LINUXGPIO:BOOL=1" CMakeCache.txt; then
+        echo "✓ CMake detected linuxgpio support"
+    else
+        echo "✗ Error: CMake did not enable linuxgpio support"
+        echo "CMake cache content:"
+        grep -i "gpiod\|gpio" CMakeCache.txt || echo "No GPIO-related entries found"
+        exit 1
+    fi
+
+    make -j$(nproc)
+    make install
+
+    # Update library cache
+    ldconfig
+
+    # Remove any old avrdude binaries from standard paths
+    rm -f /usr/bin/avrdude
+
+    echo "✓ avrdude installed from source"
+
+    # Verify installation
+    echo "Verifying avrdude installation..."
+    AVRDUDE_PATH=$(which avrdude)
+    echo "Using avrdude at: $AVRDUDE_PATH"
+
+    # Test linuxgpio support
+    if /usr/local/bin/avrdude -c ?type 2>&1 | grep -q "linuxgpio"; then
+        echo "✓ linuxgpio programmer support confirmed"
+    else
+        echo "✗ Error: linuxgpio support not found"
+        echo ""
+        echo "Available programmer types:"
+        /usr/local/bin/avrdude -c ?type 2>&1 | grep -i gpio || echo "No GPIO programmers found"
+        exit 1
+    fi
+
+    # Verify libgpiod linkage
+    if ldd /usr/local/bin/avrdude | grep -q libgpiod; then
+        echo "✓ avrdude is linked against libgpiod library"
+    else
+        echo "✗ Error: avrdude is NOT linked against libgpiod library"
+        exit 1
+    fi
+fi
+
+# Verify GPIO chip exists
+if [ ! -e /dev/gpiochip0 ]; then
+    echo "⚠ Warning: /dev/gpiochip0 not found"
+    echo "GPIO device may not be accessible"
+else
+    echo "✓ GPIO device found"
+fi
+
+# Add current user to gpio group (if not root)
+if [ -n "$SUDO_USER" ]; then
+    usermod -a -G gpio "$SUDO_USER"
+    echo "✓ User $SUDO_USER added to gpio group"
+    echo "  (You may need to log out and back in for this to take effect)"
+fi
+
+# Create udev rule for GPIO access
+echo 'SUBSYSTEM=="gpio", KERNEL=="gpiochip*", GROUP="gpio", MODE="0660"' > /etc/udev/rules.d/90-gpio.rules
+udevadm control --reload-rules
+udevadm trigger
+
+echo ""
+echo "=== Setup Complete ==="
+echo ""
+echo "Next steps:"
+echo "1. If you're not root, log out and back in for group changes to take effect"
+echo "2. Run: sudo bash flash_firmware.sh"
+echo ""

2LabsToGo-Eco-Software/Operational_qualification/application.py

@@ -1,20 +1,22 @@
 #!/usr/bin/env python3
-#application.py
+# application.py
 
 import serial
 import time
 
+
 def command(ser, command):
-  ser.write(str.encode(command)) 
-  time.sleep(1)
+    ser.write(str.encode(command))
+    time.sleep(1)
+
 
-ser = serial.Serial('/dev/ttyAMA1', 115200)
+ser = serial.Serial("/dev/ttyAMA3", 115200)
 time.sleep(1)
 
-command(ser, "G0Y10F3000\r\n")  #needle is in vial 1!!
+command(ser, "G0Y10F3000\r\n")  # needle is in vial 1!!
 time.sleep(2)
 
-#first band
+# first band
 command(ser, "G0X30\r\n")
 command(ser, "G98F1200\r\n")
 command(ser, "G0X30.5F3000\r\n")

2LabsToGo-Eco-Software/Operational_qualification/backlight_off.py

@@ -1,14 +1,16 @@
 #!/usr/bin/env python3
-#backlight_off.py
+# backlight_off.py
 
 import serial
 import time
 
+
 def command(ser, command):
-  ser.write(str.encode(command)) 
-  time.sleep(1)
+    ser.write(str.encode(command))
+    time.sleep(1)
+
 
-ser = serial.Serial('/dev/ttyAMA1', 115200)
+ser = serial.Serial("/dev/ttyAMA3", 115200)
 time.sleep(1)
 
 command(ser, "M42P13S0\r\n")

2LabsToGo-Eco-Software/Operational_qualification/backlight_on.py

@@ -1,14 +1,16 @@
 #!/usr/bin/env python3
-#backlight_on.py
+# backlight_on.py
 
 import serial
 import time
 
+
 def command(ser, command):
-  ser.write(str.encode(command)) 
-  time.sleep(1)
+    ser.write(str.encode(command))
+    time.sleep(1)
+
 
-ser = serial.Serial('/dev/ttyAMA1', 115200)
+ser = serial.Serial("/dev/ttyAMA3", 115200)
 time.sleep(1)
 
 command(ser, "M42P13S255\r\n")