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ofxGPIO

★ 193 Open GitHub ↗

Library C++ for raspberrypi and orangepi, GPIO interfaces compatible with openframeworks.

// repository documentation

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# ofxGPIO

A small library in C++ for the use of GPIO raspberrypi (A/B/2/3/Zero) orangepi (one/zero/plus) this library is compatible with the toolkit for creative coding <a href="http://openframeworks.cc/">Openframeworks</a>. Interface GPIO: SPI (Serial Peripheral Interface), I2C (Inter Integrated Circuit), IO Pin read/write. 
With utilities such as: graphical gui (Gtk+ / Zenity) and  TCP Unix socket implementation.

<b><a href="http://www.ziggurats.net/port.php?port=ofxGPIO" target="_blank">Documentation</a></b>

```c
/* define for activated more functionality */

-D COMPILE_WITHOUT_OPENFRAMEWORKS /* if = 1 work pure c++ without openframeworks toolkit */
-D GTK_UI 			  /* if = 1 activated c++ simple bridge for UI gtk+ */
-D ENABLE_BCM2835		  /* if = 1 activated c header BCM2835 */
-D ENABLE_ZENITY                  /* if = 1 activated zenity for UI debug */
```

<br>
<h2>Sample simple syntax ofxGPIO I/O</h2>

```c
#include <iostream>
#include "ofxGPIO.h"

int main() 
{
        GPIO gpio;
        string state;
        int i = 0;

gpio.setup(GPIO17,OUT,LOW);

while(i<100)
        {
            gpio.set(HIGH);
            state = "State pin17: "+to_string(gpio.get());
            Log(state,FG_RED,BG_WHITE) <<"\n";
            sleep(2);

gpio.set(LOW);
            state = "State pin17: "+to_string(gpio.get());
            Log(state,FG_BLUE,BG_WHITE) <<"\n";
            sleep(2);

i++;
        }

gpio.close();
        return 0;
}
```
<br>

<h2> GPIO support </h2>

<h2> Simple Gtk+ UI Utility </h2>
<table border="1">
<tr>
<td><img src="screen/gtk-ui.png"/></td>
</tr>
</table>

<h2>Sample syntax ofxGPIO i2c</h2>

```c
I2c * bus;

bus = new I2c("/dev/i2c-1");
bus->addressSet(0x04);

while(1) 
{
	bus->writeByte(0x04,1);
	usleep(500000);
	bus->writeByte(0x04,0);
	usleep(500000);
}
```

<h2> Zenity UI Utility </h2>
<table border="1">
<tr>
<td><img src="screen/6ui.png"/></td><td><img src="screen/1ui.png"/></td><td><img src="screen/2ui.png"/></td>
</tr>
<tr>
<td><img src="screen/3ui.png"/></td><td><img src="screen/4ui.png"/></td><td><img src="screen/5ui.png"/></td>
</tr>
</table>

<h2> Sample </h2>

<h2>Sample syntax ofxGPIO SPI</h2>

```c
SPI2 spi;
char data[2];

data[0] = 1;
data[1] = 2;

spi.setup("/dev/spidev0.0",1000000);
spi.readWrite(1, (unsigned char *)data, 2);
```

<h2> Example ofxGPIO </h2>

Example scanner with nRF24L01:
	<ul>
		<li>Raspberry pi (2/3/Zero/A/A+/B+)
		<li>nRF24L01</li>
	</ul>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/raspberry-rf24.png)

Example simple Button Read state:
	<ul>
		<li>Raspberry pi (2/3/Zero/A/A+/B+)
		<li>Button</li>
	</ul>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/button_example.png)

Example simple Led Blink:
	<ul>
		<li>Raspberry pi (2/3/Zero/A/A+/B+)
		<li>Led</li>
	</ul>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/led_example.png)

Example simple Relay on / off Light:
	<ul>
		<li>Raspberry pi (2/3/Zero/A/A+/B+)
		<li>Relay 5v</li>
		<li>Lamp</li>
	</ul>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/relaylight_example.png)

Example GPS UART:
	http://aprs.gids.nl/nmea/
	<ul>
		<li>Raspberry pi (2/3/Zero/A/A+/B+)
		<li>GPS breakout v3</li>
	</ul>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/gps_example.png)

Example i2c multiple byte read MPU6050:
	<ul>
		<li>Raspberry pi (2/3/Zero/A/A+/B+)
		<li>MPU6050</li>
	</ul>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/mpu6050_example.png)

Example Led Matrix8x8:
        <ul>
                <li>Raspberry pi (2/3/Zero/A/A+/B+)
                <li>Led Matrix</li>
        </ul>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/led_matrix_i2c.png)

Example Servo motor(Attention raspberry not to have pin PWM, for this we use a CLK pin, advice integrated pwm):
        <ul>
                <li>Raspberry pi (2/3/Zero/A/A+/B+)
                <li>Servo Motor</li>
        </ul>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/servo_example.png)

Example GPIO read/write stepper rotation:
	<ul>
	<li>Raspberry PI</li>
	<li>Stepper Motor bipolar</li>
	<li>sn754410ne H-Bridge</li>
	<li>Button</li>
	<li>wiring</li>
	</ul>
<br>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/raspberry_motor_bb.jpg)
sn754410ne H-Bridge:
<br>
![alt tag](http://42bots.com/wp-content/uploads/2014/12/bipolar_stepper_four_pins.jpg)
<br>
video: <a href="http://www.youtube.com/watch?v=lwRd5D9EuU0">http://www.youtube.com/watch?v=lwRd5D9EuU0</a>
[![video](http://img.youtube.com/vi/lwRd5D9EuU0/maxresdefault.jpg)](http://www.youtube.com/watch?v=lwRd5D9EuU0)
<br><br>

Example GPIO I2C communication:
	<ul>
	<li>Raspberry PI</li>
	<li>Arduino</li>
	<li>LED</li>
	<li>Resistor 75 ohm</li>
	<li>wiring</li>
	</ul>
<br>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/i2c_raspberry_bb.jpg)
<br>
video: <a href="http://www.youtube.com/watch?v=SRz750EdjfY">http://www.youtube.com/watch?v=SRz750EdjfY</a>
[![video](http://img.youtube.com/vi/SRz750EdjfY/maxresdefault.jpg)](http://www.youtube.com/watch?v=SRz750EdjfY)
<br><br>

Example GPIO SPI add Analog pin MCP3008 potentiometer:
	<ul>
	<li>Raspberry</li>
	<li>MCP3008</li>
	<li>Potentiometer</li>
	<li>wiring</li>
	</ul>
<br>
fritzing example:
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/spi_mcp_raspberry_bb.jpg)
MCP3008 8-Channel 10-Bit ADC
<br>
![alt tag](https://github.com/kashimAstro/ofxGPIO/blob/master/screen/mcp3008pin.gif)
<br>
video: <a href="http://www.youtube.com/watch?v=PkDkCJyZ2go">http://www.youtube.com/watch?v=PkDkCJyZ2go</a>
[![video](http://img.youtube.com/vi/PkDkCJyZ2go/maxresdefault.jpg)](http://www.youtube.com/watch?v=PkDkCJyZ2go)

<BR>
for i2c and SPI configuration visit this page:

https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-spi
<br>
https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c

<br><br>
<b><h2>Datasheet integrated list:</h2></b>

<b>Drive motor:</b><br>
http://www.ti.com/lit/ds/symlink/l293.pdf<br>
http://www.ti.com/lit/ds/symlink/sn754410.pdf<br>
http://www.ti.com/lit/ds/symlink/uln2003a.pdf<br>
http://www.st.com/content/ccc/resource/technical/document/datasheet/f3/6e/c8/64/4d/b3/4e/38/CD00001244.pdf/files/CD00001244.pdf/jcr:content/translations/en.CD00001244.pdf
<br><br>

<b>Motor stepper Bipolar / Unipolar:</b><br>
http://motion.schneider-electric.com/downloads/datasheets/14_mtr.pdf<br>
http://www.mitsumi.co.jp/latest/Catalog/pdf/motor_m35sp_9_e.pdf
<br><br>

<b>A/D Converters:</b><br>
https://cdn-shop.adafruit.com/datasheets/MCP3008.pdf<br>
http://ww1.microchip.com/downloads/en/DeviceDoc/21295C.pdf
<br><br>

<b>ATmega48A/PA/88A/PA/168A/PA/328/P:</b><br>
http://www.atmel.com/images/Atmel-8271-8-bit-AVR-Microcontroller-ATmega48A-48PA-88A-88PA-168A-168PA-328-328P_datasheet_Complete.pdf
<br><br>

<b>MPU-6000 / MPU-6050:</b><br>
https://www.cdiweb.com/datasheets/invensense/MPU-6050_DataSheet_V3%204.pdf
<br><br>

<b>Adafruit Ultimate GPS:</b><br>
https://cdn-learn.adafruit.com/downloads/pdf/adafruit-ultimate-gps.pdf
<br><br>

<b>Adafruit LED Backpacks:</b><br>
https://cdn-learn.adafruit.com/downloads/pdf/adafruit-led-backpack.pdf
<br><br>

<b>EEPROM</b><br>
http://www.bucek.name/pdf/24c16.pdf
http://www.st.com/content/ccc/resource/technical/document/datasheet/5c/df/52/a5/15/f2/48/bd/CD00259166.pdf/files/CD00259166.pdf/jcr:content/translations/en.CD00259166.pdf

ofxGPIO

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