Note

This is the documentation for the latest development branch and may refer to features that are not available in released versions. If you are looking for the documentation for a specific release, use the drop-down menu on the left and select the desired version.

ADC Hal Interface Document

Hardware Introduction

The K230 has an integrated ADC converter with 6 channels and a resolution of 12 bits.

---

Function Interface Description

int drv_adc_init(void);

Function: Initialize the ADC driver.

Return Value:

• 0: Initialization successful

• -1: Failed to open the device

---

int drv_adc_deinit(void);

Function: Deinitialize the ADC driver.

Return Value:

• 0: Success

---

uint32_t drv_adc_read(int channel);

Function: Read the raw ADC value (integer, 12-bit) of the specified channel.

Parameters:

• channel: ADC channel number, range [0, DRV_ADC_MAX_CHANNEL - 1]

Return Value:

• Valid: ADC raw reading, range 0~4095

• Invalid: Returns UINT32_MAX

---

uint32_t drv_adc_read_uv(int channel, uint32_t ref_uv);

Function: Read the voltage value (unit: μV) of the specified channel.

Parameters:

• channel: ADC channel number

• ref_uv: Reference voltage value, in μV (e.g., if using the default 1.8V, pass DRV_ADC_DEFAULT_REF_UV)

Return Value:

• Converted voltage value (μV)

---

Example

Please refer to src/rtsmart/libs/testcases/rtsmart_hal/test_adc.c