DigitalInput3.cpp

Go to the documentation of this file.

#include <stdio.h>
#include <unistd.h>

#include "../hubolib.h"
#include "../hubocfg.h" // Required for changing default I2C device.

using namespace HuboLib;

/*
Compile and link: 
    g++ DigitalInput3.cpp -L../ -lhubo -lpthread -lrt -o DigitalInput3.out
Run:
    sudo ./DigitalInput3.out
Purpose:
    Read digital inputs 0 and 1 and display them in the console.
    The program will terminate when digital input 2 is lowered to ground.
    The hubo library gets properly de-initialized prior to finishing.
    Check whether the calls to the library really succeded. If not stop.
*/

int main(void)
{
    // If required - set the I2C device to work with. The Raspberry Pi uses "/dev/i2c-1" which is default, the Banana Pi uses "/dev/i2c-0"
    #ifdef BPI
        g_I2CConfig.m_sI2CDevice = "/dev/i2c-0";
    #endif

    // Initialize the library once in your program.
    if (!Initialize())
    {
        printf ("Error: Initialize\n");
        return 1;
    }
    
    while (1) 
    {
        bool bState = false;
            
        // Read digital input number 0.
        if (!Get_DI_Channel(0, bState))
        {
            printf ("Error: Get_DI_Channel\n");
            break;
        }
        printf ("Digital input 0 = %s  ", bState ? "ON " : "OFF");
            
        // Read digital input number 1.
        if (!Get_DI_Channel(1, bState))
        {
            printf ("Error: Get_DI_Channel\n");
            break;
        }
        printf ("Digital input 1 = %s  ", bState ? "ON " : "OFF");
        
        printf ("\n");

        // Should we finish?
        if (!Get_DI_Channel(2, bState))
        {
            printf ("Error: Get_DI_Channel\n");
            break;
        }
        
        if (bState == false)
            break;

        usleep (1000L * 10L);
    } 

    // Free library resources.
    Uninitialize();
    
    return 0;
}