display_ctl.cpp

// Compile with: g++ `pkg-config --cflags --libs rpi-hw` display_ctl.cpp -o display_ctl

// Include Rpi-hw headers
#include <rpi-hw.hpp>
#include <rpi-hw/time.hpp>
#include <rpi-hw/iface/decoder-out.hpp>
#include <rpi-hw/display/m7seg.hpp>

// Use Rpi-hw namespace
using namespace rpihw;

int
main( int argc, char *args[] ) {

    // Multiple seven-segment display controller
    display::m7seg dev( 1, 4, 18, 15, 14, 0, 17, 23 );

    // Create the enabler interface
    iface::decoderOut enabler( { 21, 22 } );

    // Set the number of displays and the enabler interface
    dev.setDisplays( 2, enabler );

    // Set the updating frequency (Hz)
    dev.setFreq( 60.0 );


    // Read new values from the stdin
    float tmp;

    while ( std::cin >> tmp )
        dev.set( tmp );

    return 0;
}