SDAA116 October   2025 CC2340R5

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 CC2340R5
    2. 1.2 DRV8251A
    3. 1.3 BDC Motor
    4. 1.4 TMAG5213
  5. 2BDC Application
    1. 2.1 Hardware Setup
      1. 2.1.1 DRV8251AEVM Settings
    2. 2.2 Connection Diagram
  6. 3Running the Example
    1. 3.1 Dependencies
    2. 3.2 Loading Firmware
    3. 3.3 Zigbee Network Formation
  7. 4Firmware Design
    1. 4.1 Code Flow Description
    2. 4.2 LaunchPad Button Functionality
    3. 4.3 Non-Volatile Memory
    4. 4.4 Bidirectional PWM Motor Control
    5. 4.5 ADC Overcurrent Protection Feature
    6. 4.6 Hall-Effect Based Motor Position Tracking Feature with Configurable Endpoints
    7. 4.7 Logging Functionality
    8. 4.8 Interoperability with Third-Party Smart Hub Devices
  8. 5Tests and Results
    1. 5.1 PWM and Hall-effect Signal Analysis
    2. 5.2 Power Consumption Analysis with EnergyTrace™
  9. 6Summary
  10. 7References

4.4 Bidirectional PWM Motor Control

This BDC motor application uses the PWM driver to implement variable speed motor control in both the forward and reverse direction. This requires the use of two separate PWM timers to enable bidirectional control. Motor acceleration and deceleration features are implemented to smoothly ramp up and ramp down the duty cycle to reduce sudden from zero to PWM_DUTY_VALUE.