intval3/lib/intval/Readme.md

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<a name="Intval"></a>
## Intval
Class representing the intval3 features
**Kind**: global class
* [Intval](#Intval)
* [._declarePins()](#Intval+_declarePins)
* [._undeclarePins()](#Intval+_undeclarePins)
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* [._startFwd()](#Intval+_startFwd)
* [._startBwd()](#Intval+_startBwd)
* [._stop()](#Intval+_stop)
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* [._watchMicro(err, val)](#Intval+_watchMicro)
* [._watchRelease(err, val)](#Intval+_watchRelease)
* [.frame(dir, time, delay)](#Intval+frame)
<a name="Intval+_declarePins"></a>
### intval._declarePins()
Intval._declarePins() -
(internal function) Declares all Gpio pins that will be used
**Kind**: instance method of [<code>Intval</code>](#Intval)
<a name="Intval+_undeclarePins"></a>
### intval._undeclarePins()
Intval._undeclarePins() -
(internal function) Undeclares all Gpio in event of uncaught error
that interupts the node process
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**Kind**: instance method of [<code>Intval</code>](#Intval)
<a name="Intval+_startFwd"></a>
### intval._startFwd()
Intval._startFwd() -
Start motor in forward direction by setting correct pins in h-bridge
**Kind**: instance method of [<code>Intval</code>](#Intval)
<a name="Intval+_startBwd"></a>
### intval._startBwd()
Intval._startBwd() -
Start motor in backward direction by setting correct pins in h-bridge
**Kind**: instance method of [<code>Intval</code>](#Intval)
<a name="Intval+_stop"></a>
### intval._stop()
Intval._stop() -
Stop motor by setting both motor pins to 0 (LOW)
**Kind**: instance method of [<code>Intval</code>](#Intval)
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<a name="Intval+_watchMicro"></a>
### intval._watchMicro(err, val)
Intval._watchMicro() -
Callback for watching microswitch state changes
Using GPIO 06 on raspberry pi zero w
**Kind**: instance method of [<code>Intval</code>](#Intval)
| Param | Type | Description |
| --- | --- | --- |
| err | <code>object</code> | Error object present if problem reading pin |
| val | <code>integer</code> | Current value of the pin |
<a name="Intval+_watchRelease"></a>
### intval._watchRelease(err, val)
Intval._watchRelease() -
Callback for watching relese switch state changes
Using GPIO 05 on raspberry pi zero w
* If closed, start timer.
* If opened, check timer AND
* If time closed longer than minimum and less than `this._releaseSequence`, start frame
* If time closed longer than `this._releaseSequence`, start sequence
**Kind**: instance method of [<code>Intval</code>](#Intval)
| Param | Type | Description |
| --- | --- | --- |
| err | <code>object</code> | Error object present if problem reading pin |
| val | <code>integer</code> | Current value of the pin |
<a name="Intval+frame"></a>
### intval.frame(dir, time, delay)
Intval.frame() -
Begin a single frame with set variables or defaults
**Kind**: instance method of [<code>Intval</code>](#Intval)
| Param | Type | Default | Description |
| --- | --- | --- | --- |
| dir | <code>boolean</code> | <code></code> | (optional) Direction of the frame |
| time | <code>integer</code> | <code></code> | (optional) Exposure time, 0 = minimum |
| delay | <code>delay</code> | <code></code> | (optional) Delay after frame before another can be started |