Get one byte from ring buffer, the user needs to handle the concurrent access on buffer via put/get/flush.
int32_t ringbuffer_get( struct ringbuffer *const rb, uint8_t * data )
Type: struct ringbuffer Struct *const
The pointer to a ring buffer structure instance
Type: uint8_t *
One byte space to store the read data
Type: int32_t
ERR_NONE on success, or an error code on failure.