Commands listed in the table below are used in all modes of HT.
| Command | Sub Command | Description | ||
|---|---|---|---|---|
| set | mode | output | pulse | set mode: output pulse |
| toggle | set mode: output toggle | |||
| pwm | set mode: output infinite pulse | |||
| capture | rise | set mode: capture with rising edge | ||
| fall | set mode: capture with falling edge | |||
| toggle | set mode: capture with rising or falling edge | |||
| div | ms | set unit: millisecond | ||
| us | set unit: microsecond | |||
| trigger | from | ht0 | set trigger target (should be ht0) | |
| php | set trigger target (none) | |||
| reset | - | reset | ||
| get | state | get current state | ||
| div | get division rate | |||
| repc | get remaining repeat count | |||
| start | - | start | ||
| stop | - | stop | ||
HT provides various output modes as well as capture mode. How to set each mode is as follows:
| Mode | Syntax | |
|---|---|---|
| Output | pulse mode | pid_ioctl($pid, "set mode output pulse"); |
| toggle mode | pid_ioctl($pid, "set mode output toggle"); | |
| pwm mode | pid_ioctl($pid, "set mode output pwm"); | |
| Capture | rising edge | pid_ioctl($pid, "set mode capture rise"); |
| falling edge | pid_ioctl($pid, "set mode capture fall"); | |
| rising/falling edge | pid_ioctl($pid, "set mode capture toggle"); | |
HT provides millisecond and microsecond unit and the default value is microsecond. How to set each unit is as follows:
| Unit | Syntax |
|---|---|
| millisecond | pid_ioctl($pid, "set div ms"); |
| microsecond | pid_ioctl($pid, "set div us"); |
How to set trigger is as follows:
| Target | Syntax |
|---|---|
| ht0 | pid_ioctl($pid, "set trigger from ht0"); |
| php | pid_ioctl($pid, "set trigger from php"); // No trigger target |
HT0 is only option for setting HT as target of trigger in output mode. The default value is "php".
This command does:
| Command | Syntax |
|---|---|
| reset | pid_ioctl($pid, "reset"); |
This command is for getting status of HT.
| Status | Syntax |
|---|---|
| current state | pid_ioctl($pid, "get state"); |
| division rate | pid_ioctl($pid, "get div"); |
| remaining count of output / capture | pid_ioctl($pid, "get repc"); |
Return values of this command are as follows:
| Division | Return Value | Description |
|---|---|---|
| current state | 0 | stopped |
| 1 ~ 3 | running | |
| division rate | 42 | microsecond |
| 42000 | millisecond | |
| remaining count of output / capture | 0 ~ 64 | - |
This command starts HT.
| Command | Syntax |
|---|---|
| start | pid_ioctl($pid, "start"); |
Command "stop" immediately stops operation of HT. In output modes, state of output pin keeps unchanged.
| Command | Syntax |
|---|---|
| stop | pid_ioctl($pid, "stop"); |