ATmega328P Pump Controller Firmware

Our prototype is already built around an ATmega328P, a 6-digit SSD LED display, a 9-key membrane keyboard, two pump-drive outputs, one pressure-sensor input and two status LEDs. I now need a concise, well-commented firmware that ties all of this together.

Core behaviour
• Read the analog pressure sensor, scale and show the resulting value on the six-digit display (numerical only).
• Accept user-defined settings from the 9-key keyboard and store them in EEPROM so they survive power-cycling.
• Drive the two pump-control outputs whenever the sensor reading crosses the relevant set-points or when the operator explicitly activates them from the keyboard.
• Blink or steady-light the two indicator LEDs to signal normal operation, alarm or error (exact patterns are open for your suggestion).

What I expect from you
• Complete source code in C or Arduino-style C++ for the ATmega328P, with clear in-line comments.
• A compiled HEX file ready for flashing.
• Pin map and a short read-me explaining how to adjust key parameters or add future features.

The board is on my bench, so I can test quickly and give feedback in real time. Turn-around of roughly one working day should be feasible for someone familiar with AVR-GCC or the Arduino toolchain.

If we work well together, I have several follow-up controllers in the pipeline and would be happy to collaborate again.