Capture Mode

This mode is used when you want to get a count value from a specific time which an event occurs. Available commands in the capture mode are as follows:

Command Sub Command Description
set mode capture rise set capture mode: rising edge
fall set capture mode: falling edge
toggle set capture mode:
rising or falling edge
div ms set unit: millisecond
us set unit: microsecond
repc [N] set capture count
trigger from ht0 set a target of trigger: ht0
php set a target of trigger: none
pin rise set a type of pin trigger event: rising
fall set a type of pin trigger event: falling
toggle set a type of pin trigger event:
rising and falling
reset - reset
get count [N] get a count value
state get current state
repc get remaining repeat count
start - start
stop - stop

Set Repeat Count

Repeat count in the capture mode means the number of capturing a specific event. Available repeat count N is from 0 to 64. The default value is 0 and it is regarded as maximum value (64).

Command Syntax
repeat count pid_ioctl($pid, "set repc N");

Set Trigger

You can set a trigger target to a HT pin with event as well as HT 0 in the capture mode. How to set this command is as follows:

Division Syntax
ht0 pid_ioctl($pid, "set trigger from ht0");
pin event pid_ioctl($pid, "set trigger from pin");
pid_ioctl($pid, "set trigger from pin rise");
pid_ioctl($pid, "set trigger from pin fall");
pid_ioctl($pid, "set trigger from pin toggle");
php pid_ioctl($pid, "set trigger from php");

There are three event types for pin event: rising edge, falling edge and toggle. You can set the pin event trigger to one of them and the default is toggle when you do not specify any of event types.
The default value of setting trigger is "php" which means no trigger target is selected. Although a trigger target is set, you can cancel the designation by specifying the trigger target to "php". In this case, HT starts capturing when it starts.

※ Note that HT2 does not support pin event trigger.

Get a Count Value

This command is for reading a captured count value of HT. Index of the count values can be specified behind this command. How to use it is as follows:

Division Syntax
[N]th count value pid_ioctl($pid, "get count [N]");

The counter index starts from 0. If you do not specify the index, it will be set to 0. The maximum value of the index is 64.
Accumulated counter values cannot be greater than 32764 in the capture mode. If it exceeds the limitation, HT immediately stops capturing.