ADC

A9/A9G have two 10 bits ADC interface, 0~1.8V voltage can be measured

example: demo/adc

1. Enumerated type

1.1. ADC_Channel_t

ADC channel,ADC0 and ADC1

typedef enum
{
    ADC_CHANNEL_0 = 0 ,
    ADC_CHANNEL_1     ,
    ADC_CHANNEL_MAX
}ADC_Channel_t;

1.2. ADC_Sample_Period_t

ADC sample rate

typedef enum
{
    ADC_SAMPLE_PERIOD_122US = 0        ,
    ADC_SAMPLE_PERIOD_1MS              ,
    ADC_SAMPLE_PERIOD_10MS             ,
    ADC_SAMPLE_PERIOD_100MS            ,
    ADC_SAMPLE_PERIOD_250MS            ,
    ADC_SAMPLE_PERIOD_500MS            ,
    ADC_SAMPLE_PERIOD_1S               ,
    ADC_SAMPLE_PERIOD_2S               ,
    ADC_SAMPLE_PERIOD_MAX              
} ADC_Sample_Period_t;//Acquisition Time Period

2. Struct

2.1. ADC_Config_t

ADC config info, include channel and sample rate

typedef struct
{
    ADC_Channel_t        channel;
    ADC_Sample_Period_t  samplePeriod;
}ADC_Config_t;

3. Function

3.1. ADC_Init

void ADC_Init(ADC_Config_t adcConfig);

Function

初始化ADC

Parameters

• adcConfig：ADC config infomation

Return

None

3.2. ADC_Read

bool ADC_Read(ADC_Channel_t channel, uint16_t* value, uint16_t* mV);

Function

Read ADC value, value in 0~1023, voltage in 0~1.8v

Parameters

• channel:ADC channel
• value: the value read
• mV: the voltage value read

Return

• bool：read success or not

3.3. ADC_Close

void ADC_Close(ADC_Channel_t channel);

Function

关闭ADC定期采样，当所有通道关闭后会释放ADC硬件资源 Close ADC, release ADC resources when all channel are closed

Parameters

• channel:ADC channel

Return

None