Class: ServoPi

ServoPi

This class contains methods for use with the ServoPi and Servo PWM Pi Zero from
https://www.abelectronics.co.uk/p/72/Servo-PWM-Pi-Zero

Methods:

Connect() 

Connect to the I2C device
Parameters: none
Returns: null

IsConnected() 

Check if the device is connected
Parameters: none
Returns: boolean

Dispose() 

Dispose of the active I2C device
Parameters: none
Returns: null

SetPwmFreq(freq) 

Set the PWM frequency
Parameters: freq - required frequency
Returns: null

SetPwm(channel, on, off) 

Set the output on single channels
Parameters: channel - 1 to 16, on - time period, off - time period
Returns: null

SetAllPwm( on, off) 

Set the output on all channels
Parameters: on - time period, off - time period
Returns: null

byte OutputEnablePin { get; set; }

Parameters: Set the GPIO pin for the output enable function.
Returns: null
Notes: The default GPIO pin 4 is not supported in Windows 10 IOT so the OE pad will need to be connected to a different GPIO pin.

OutputDisable()

Disable the output via OE pin
Parameters: null
Returns: null

OutputEnable()

Enable the output via OE pin
Parameters: null
Returns: null

Usage

To use the ServoPi Pi library in your code you must first import the library dll:

using ABElectronics_Win10IOT_Libraries;

Next you must initialise the ServoPi class:

ABElectronics_Win10IOT_Libraries.ServoPi servo = new ABElectronics_Win10IOT_Libraries.ServoPi(0x40);

The argument is the I2C addresses of the Servo Pi chip.

Next we need to connect to the device and wait for the connection

servo.Connect();

while (!servo.IsConnected)
{
}

Set PWM frequency to 60 Hz and enable the output

servo.SetPWMFreqency(60);                       

Optional You can set the enable pin to use the output enable functions and the enable and disable the output. The default GPIO pin 4 is not supported in Windows 10 IOT and so the OE pad will need to be connected to a different GPIO pin to use this functionality.

servo.OutputEnablePin(17); // set to GPIO pin 17
servo.OutputEnable();

Move the servo to a position and exit the application.

servo.SetPWM(1, 0, 300);