OptionFlags.EXTTRIGGER: Hold off the scan (after calling a_in_scan_start()) until the trigger condition is met. The trigger is a 3.3V or 5V logic signal applied to the TRIG pin.
OptionFlags.CONTINUOUS: Scans continuously until stopped by the user by calling a_in_scan_stop() and writes data to a circular buffer. The data must be read before being overwritten to avoid a buffer overrun error. samples_per_channel is only used for buffer sizing.
看了他的解释有点问题,没理解,触发之后的扫描方式