5.3.2.6 adc_os_read_channel

Read data asked for from the ring buffer.

int32_t adc_os_read_channel(
    struct adc_os_descriptor *const descr,
    const uint8_t channel,
    uint8_t *const buffer,
    const uint16_t length
)

If the number of data in ring buffer less than want to read, the task/thread will be blocked until read is done.

Parameters

descr

Type: struct adc_os_descriptor Struct *const

The pointer to ADC descriptor

channel

Type: const uint8_t

Channel number

buf

A buffer to read data

length

Type: const uint16_t

The size of the buffer

Returns

Type: int32_t

The number of bytes the user wants to read.