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ADC Hal interface documentation

Hardware introduction

K230 integrates an ADC converter with a total of 6 channels and a resolution of 12bit.

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Function interface description

int drv_adc_init(void);

Function: Initialize ADC driver.

Return Value:

• 0: initialization successful

• -1: Failed to open device

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int drv_adc_deinit(void);

Function: Deinitialize ADC driver.

Return Value:

• 0: Success

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uint32_t drv_adc_read(int channel);

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

parameter:

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

Return Value:

• When valid: ADC raw reading, range 0~4095

• When invalid: return UINT32_MAX

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uint32_t drv_adc_read_uv(int channel, uint32_t ref_uv);

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

parameter:

• channel: ADC channel number

• ref_uv: reference voltage value, unit is μV (if the default 1.8V is used, pass DRV_ADC_DEFAULT_REF_UV)

Return Value:

• Converted voltage value (μV)

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Example

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