Summary

This tutorial explains the basics of Analog-to-Digital Conversion on the MSP430G2231 and shows a complete example that reads an ADC channel and toggles LEDs based on the result. Readers will get a hands-on, register-level walkthrough of configuring the MSP430 ADC, sampling an input, and using the measured value for simple digital control.

Key Takeaways

• Configure the MSP430 ADC (ADC10) by setting ADC10CTL0/ADC10CTL1 and ADC10AE0 to enable and select analog inputs.
• Read and interpret ADC results from ADC10MEM and use ADC10IFG to detect conversion completion (polling approach).
• Implement threshold-based logic to toggle GPIO-driven LEDs based on ADC readings.
• Apply basic best practices for sampling (reference selection, input enabling) and consider low-power implications when sampling periodically.

Who Should Read This

Firmware developers, hobbyists, or embedded engineers new to MSP430 who want a hands-on, low-level guide to using the ADC for sensor interfacing and simple control.

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