PowerSupply2024.X Firmware

Overview

PowerSupply2024.X is the firmware for a PIC microcontroller-based programmable power supply (PSU). It allows precise voltage and current control, user interface interaction, and safety monitoring. The project is built using MPLAB X IDE with MCC-generated peripheral drivers.

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Features

• Linear Voltage and Current regulation using DAC or PWM output
• Feedback monitoring via ADC channels
• User interface with buttons, encoders, LEDs, or display
• PC/host communication via UART/USB commands
• Safety features:
  • Overcurrent protection
  • Overvoltage protection
  • Thermal protection
  • Watchdog reset

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Project Structure

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Firmware Architecture

             ┌───────────────────────┐
             │      User / PC        │
             │ - Buttons / Encoder   │
             │ - UART/USB Commands   │
             └─────────┬─────────────┘
                       │
                       ▼
             ┌───────────────────────┐
             │     UI / Comm Layer    │
             │ - LCD / 7-seg Display │
             │ - LED Indicators      │
             │ - Command Parser      │
             └─────────┬─────────────┘
                       │
                       ▼
             ┌───────────────────────┐
             │      Control Logic     │
             │ - Voltage / Current   │
             │   Regulation (PID)    │
             │ - Safety Checks       │
             │ - State Machine       │
             └─────────┬─────────────┘
                       │
   ┌───────────────────┼───────────────────┐
   │                   │                   │
   ▼                   ▼                   ▼

Set Voltage Set Current Check for over current

Description:

1. User / PC: Input from physical buttons, encoders, or commands via UART/USB.
2. UI / Communication Layer: Parses user or PC commands, updates display and indicators.
3. Control Logic: Main firmware loop performing regulation, state management, and safety checks.
4. Peripheral Layer: Handles ADC, DAC, PWM, and MCU pins to control PSU outputs.
5. PSU Output & Feedback: Supplies regulated voltage/current to the load and reads back output for feedback.
6. Safety / Error Layer: Monitors faults and triggers safe shutdown if necessary.

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Building and Programming

1. Open the project in MPLAB X IDE.
2. Ensure MCC-generated files are up-to-date.
3. Connect a PIC programmer/debugger.
4. Build and program the firmware to the target MCU.

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Notes

• Modify control parameters in control.c to adjust voltage/current regulation behavior.
• Ensure ADC channels, PWM/DAC outputs, and safety limits match your PSU hardware.
• The firmware can be extended to support additional interfaces or displays by adding modules in src/.

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