Modules and Sensors

[FrancoPerotti]

LPC1769 Modules Used in the Project

For this project, the following modules of the LPC1769 board will be used:

1. GPIO: Will be used to connect a 7-segment display, which will show the count of processed units.
2. Systick: This module will perform periodic ADC conversions, connected to an LM35 temperature sensor, allowing temperature readings at regular intervals.
3. ADC: The ADC will obtain the temperature from the LM35 sensor, converting the sensor's analog signal into digital values that the system can process.
4. DAC: The DAC will generate a continuous voltage to power the conveyor belt motor, enabling precise control.
5. TIMER0: This module will be used to perform measurements with the HY-SRF05 ultrasonic sensor, allowing the system to count objects on the conveyor belt.
6. UART: The UART module will be used to send configuration information for the conveyor belt, such as the operating speed, and to receive system status, alerts, and notifications.
7. GPDMA: Will be used in conjunction with the UART module to enable efficient communication, without requiring the main processor to handle data transmission.

Sensors Used in the Project:

• LM35: Temperature sensor used to measure the temperature of beverages on the conveyor belt.
• HY-SRF05: Ultrasonic sensor used to count objects passing above the conveyor belt.

Extras

• DC Motor: Motor that controls the movement of the conveyor belt.
• 7-Segment Display: Display that shows the count of objects passing through the conveyor.

Interaction Between the Modules

[FrancoPerotti]

Updated Design Overview

Changes to the System:

1. 7-Segment Display Replacement:

   • Instead of a 7-segment display to show the object count, the system will now use a single LED.
   • Functionality: The LED will turn on briefly every time an object is counted, providing a simple visual indication of the event.
   • Reason: The 7-segment display was too restrictive in the number of objects counted it could show.

2. Added Buttons:

   • START Button: This button will initialize and start the entire system, including the conveyor belt and sensors.
   • STOP Button: This button will halt all system operations, including stopping the motor and disabling the sensors.

3. TIMER module replacement:

   • Instead of using the TIMER0 module, we decided to use the TIMER2 module.
   • Reason: The CAP pin associated with the TIMER2 module are phisically placed in a more accesible place on the LPC1769 circuit board.

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Updated LPC1769 Modules Used in the Project

1. GPIO

• Purpose:
  • Control the LED that lights up whenever an object is detected.

2. EXTI

• Purpose:
  • Read input from the START and STOP buttons.

3. Systick

• Purpose:
  • Perform periodic ADC conversions to measure temperature using the LM35 sensor.

4. ADC

• Purpose:
  • Convert the analog signal from the LM35 temperature sensor into digital values for processing.

5. DAC

• Purpose:
  • Generate a continuous voltage to control the conveyor belt motor.

6. TIMER2

• Purpose:
  • Handle timing measurements for the HY-SRF05 ultrasonic sensor to count objects.

7. UART

• Purpose:
  • Send configuration information (e.g., speed) and receive status updates and alerts from the system.

8. GPDMA

• Purpose:
  • Enable efficient UART communication without burdening the processor.

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Sensors Used in the Project

• LM35: Temperature sensor to monitor beverage temperature.
• HY-SRF05: Ultrasonic sensor to count objects on the conveyor belt.

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Extras

• DC Motor: Controls the movement of the conveyor belt.
• LED: Lights up briefly to indicate when an object is counted.
• Buttons (START and STOP): Provide full control to start or stop the system.