DigitalSlaveInput1.cpp

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#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++ DigitalSlaveInput1.cpp -L../ -lhubo -lpthread -lrt -o DigitalSlaveInput1.out
Run:
    sudo ./DigitalSlaveInput1.out
Purpose:
    Read digital inputs 0 and 1 from the I2C slave with index 0 (0x21) and display them in the console.
    The program will not terminate. Press Ctr-C to exit.
*/

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.
    Initialize();
    
    while (1) 
    {
        bool bState = false;
            
        int slaveNo = 0;
        
        // Read digital input number 0.
        Get_Slave_DI_Channel(slaveNo, 0, bState);
        printf ("Slave %d - digital input 0 = %s  ", slaveNo, bState ? "ON " : "OFF");
            
        // Read digital input number 1.
        Get_Slave_DI_Channel(slaveNo, 1, bState);
        printf ("Slave %d - digital input 1 = %s  \n", slaveNo, bState ? "ON " : "OFF");
        
        usleep (1000L * 10L);
    } 

    // We won't get here - press Ctrl-C to terminate.
    return 0;
}