docs: Add MARISOL.md and improve README for piDSLM

MARISOL.md

@@ -0,0 +1,36 @@
+# MARISOL.md — Pipeline Context
+
+## Project Overview
+piDSLM is a Raspberry Pi DSLR-like camera interface project that provides GUI controls for photo/video capture using the HQ Camera, with Dropbox upload integration. The project uses Python with guizero for the GUI, RPi.GPIO for hardware control, and picamera/picamera2 for camera operations. It's designed for Raspberry Pi 2/3 with MHS35-TFT display.
+
+## Build & Run
+- **Language**: Python 3.x
+- **Framework**: guizero (GUI framework)
+- **Docker image**: python:3.12-slim
+- **Install deps**: `pip install -r requirements.txt`
+- **Run**: `python3 pidslm.py` (requires Raspberry Pi hardware with HQ Camera and MHS35-TFT display)
+
+## Testing
+- **Test framework**: pytest
+- **Test command**: `python -m pytest tests/ -v`
+- **Hardware mocks needed**: yes — RPi.GPIO, guizero, picamera, picamera2, gpiozero, spidev, and other hardware modules are pre-mocked in tests/conftest.py
+- **Known test issues**: The main application (pidslm.py) contains while-True loops that prevent normal execution in headless environments; conftest.py strips these loops via AST parsing for testing
+
+## Pipeline History
+- Initial pipeline run: Project structure analyzed, dependencies verified
+- Test setup verified: conftest.py provides 15+ RPi hardware module mocks
+- Source loading: source_module fixture loads pidslm.py and dropbox_upload.py with hardware mocks active
+
+## Known Issues
+- **Hardware dependency**: Project requires actual Raspberry Pi hardware (HQ Camera, MHS35-TFT display) for full functionality
+- **while-True loops**: Main application has infinite loops that must be stripped for testing
+- **OAuth2 token**: Dropbox integration requires manual token setup (TOKEN = 'YOUR_ACCESS_TOKEN' in dropbox_upload.py)
+- **INSTALL.sh**: Requires sudo privileges and Raspberry Pi environment
+
+## Notes
+- **Key files**: pidslm.py (main GUI application), dropbox_upload.py (Dropbox integration), INSTALL.sh (installation script)
+- **Dependencies**: Pillow, guizero, dropbox, guizero[images]
+- **Test infrastructure**: tests/conftest.py provides comprehensive hardware mocking for RPi modules
+- **Architecture**: Uses guizero App class for GUI, RPi.GPIO for camera control, picamera/picamera2 for camera operations
+- **Dropbox integration**: Uses OAuth2 API v2, requires manual token configuration
+- **GUI controls**: Provides buttons for photo capture, video recording, and Dropbox upload

README.md

@@ -50,5 +50,39 @@ Finally, run the INSTALL.sh script using the following command
 sudo ./INSTALL.sh
 ```
 
+# Usage
 
+The main application provides a GUI interface for camera control:
 
+1. Launch the application: `python3 pidslm.py`
+2. Use the on-screen buttons to:
+   - Take photos
+   - Record videos
+   - View captured media in gallery
+   - Upload footage to Dropbox
+
+The interface is designed for the MHS35-TFT display on Raspberry Pi.
+
+# Testing
+
+Run the test suite using pytest:
+
+```bash
+python -m pytest tests/ -v
+```
+
+The tests use hardware mocks provided in `tests/conftest.py` for RPi.GPIO, guizero, and other hardware modules.
+
+# Contributing
+
+This project is inspired by the MerlinPi project. Feel free to:
+
+- Submit bug reports and feature requests
+- Contribute camera grip designs for the enclosure
+- Share improvements to the codebase
+
+For design contributions, reach out to the author for inclusion.
+
+# License
+
+This project is based on the MerlinPi project by Martin Manders. Please respect the original license and contributors.