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ADC Example

Introduction

This example demonstrates the basic usage of the K230 ADC HAL: initializing the ADC, reading raw values from a specified channel, and converting them to voltage values based on the reference voltage.

Source code location: src/rtsmart/examples/peripheral/adc/test_adc.c

Example Behavior

• Supports command-line arguments to select the ADC channel

• Supports selecting the reference voltage (only 1.8V or 3.6V)

• Outputs the raw value and converted voltage once per second

• Supports Ctrl+C to exit and deinitialize the ADC

Key Interfaces

• drv_adc_init()

• drv_adc_read(channel)

• drv_adc_read_uv(channel, ref_uv)

• drv_adc_deinit()

Build and Run

cd src/rtsmart/examples/peripheral/adc
make

Run:

./test_adc [channel] [ref_uv]

Parameter description:

• channel: ADC channel number, range 0..DRV_ADC_MAX_CHANNEL-1, default 0

• ref_uv: Reference voltage (microvolts), only 1800000 or 3600000 are supported, default DRV_ADC_DEFAULT_REF_UV

Examples:

./test_adc
./test_adc 1 1800000
./test_adc 2 3600000

Output Example

ADC Test Application
Reading channel 0 with reference 1.80V
Press Ctrl+C to stop...

Channel 0: Raw=0x123 ( 291), Voltage=1.0245V (1024500 uV)

Tip

For details on the ADC interface, please refer to the ADC API Documentation.