rudatctrl/main.cpp at master · WebbyMD1/rudatctrl · GitHub

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#include <iostream>
#include <unistd.h>
#include <string>
#include <sstream>
#include <iomanip>
#include <hidapi/hidapi.h>
#include "rudat_6000_90_attenuator.hpp"
#include <cxxopts.hpp>

static unsigned short sVendorId  = 0x20ce ;
static unsigned short sProductId = 0x0023 ;

// RUDAT programmable attenuators are represented in the Linux filesystem as:
// /dev/hidraw0 ... /dev/hidraw1 etc
// However with multiple attenuators in a system we can never know which device
// is enumerated as hidraw0 or hidraw1. On this basis we must identify attenuators
// based upon their serial number as these are the only ID unique to an individual
// attenuator.

int main( int argc, char* argv[] )
{
    int retval = 0 ;
    cxxopts::Options options( "rudatctrl", "Control of mini-circuits Rudat 6000 USB attenuators" ) ;
    options.add_options()
        ( "l,list",   "List serial numbers of connected attenuators" )
        ( "h,help",   "Dislpay help"                                 )
        ( "s,serial", "Serial number", cxxopts::value<std::string>() )
        ( "a,atten",  "Attenuation",   cxxopts::value<int>()         ) ;

    try
    {
        auto result = options.parse( argc, argv ) ;
        int hidinit = hid_init() ;

        if ( hidinit == -1 )
        {
            std::cerr << "hidapi library error" << std::endl ;
            retval = -1 ;
        }

        if ( result.count( "help" ) )
        {
            std::cout << options.help() << std::endl ;
            retval = 0 ;
        }
        else if ( result.count( "list" ) )
        {
            // List all of the Rudat attenuators in the system
            struct hid_device_info * dev     = 0 ;
            struct hid_device_info * cur_dev = 0 ;

            dev = hid_enumerate( sVendorId, sProductId ) ;
            cur_dev = dev ;
            while ( cur_dev )
            {
                hid_device * pHandle = hid_open_path( cur_dev->path ) ;

                if ( pHandle != 0 )
                {
                    md1tech::Rudat6k90 attenuator( pHandle ) ;
                    std::string serstr( "" ) ;
                    attenuator.getSerialNumber( serstr ) ;
                    std::cout << serstr << std::endl ;
                    hid_close( pHandle ) ;
                }

                cur_dev = cur_dev->next ;
            }

            retval = 0 ;
        }
        else if ( result.count( "serial" ) )
        {
            std::string serialstring = result[ "serial" ].as<std::string>() ;

            // to get here the command line doesn't contain help or list, but does
            // contain serial. Work out if it's get or set and then execute upon it
            if ( result.count( "atten" ) )
            {
                int atten = result[ "atten" ].as<int>() ;

                // Set attenuation command
                struct hid_device_info * dev     = 0 ;
                struct hid_device_info * cur_dev = 0 ;

                dev = hid_enumerate( sVendorId, sProductId ) ;
                cur_dev = dev ;
                bool found = false ;
                while ( cur_dev && found == false )
                {
                    hid_device * pHandle = hid_open_path( cur_dev->path ) ;

                    if ( pHandle != 0 )
                    {
                        md1tech::Rudat6k90 attenuator( pHandle ) ;
                        std::string serstr( "" ) ;
                        attenuator.getSerialNumber( serstr ) ;

                        if ( serstr == serialstring )
                        {
                            double a = 0 ;
                            if ( attenuator.setAttenuation( atten ) != true )
                            {
                                std::cerr << "attenuation out of range" << std::endl ;
                            }
                            else
                            {
                                found = true ;
                            }
                        }

                        hid_close( pHandle ) ;
                    }

                    cur_dev = cur_dev->next ;
                }

                if ( found == true ) { retval =  0 ; }
                else                 { retval = -1 ; }
            }
            else
            {
                // Get attenuation command
                struct hid_device_info * dev     = 0 ;
                struct hid_device_info * cur_dev = 0 ;

                dev = hid_enumerate( sVendorId, sProductId ) ;
                cur_dev = dev ;
                bool found = false ;
                while ( cur_dev && found == false )
                {
                    hid_device * pHandle = hid_open_path( cur_dev->path ) ;

                    if ( pHandle != 0 )
                    {
                        md1tech::Rudat6k90 attenuator( pHandle ) ;
                        std::string serstr( "" ) ;
                        attenuator.getSerialNumber( serstr ) ;

                        if ( serstr == serialstring )
                        {
                            double a = 0 ;
                            if ( attenuator.readAttenuation( a ) != true )
                            {
                                std::cerr << "error reading attenuation" << std::endl ;
                            }
                            else
                            {
                                std::cout << a << std::endl ;
                                found = true ;
                            }


                        }

                        hid_close( pHandle ) ;
                    }

                    cur_dev = cur_dev->next ;
                }

                if ( found == true ) { retval =  0 ; }
                else                 { retval = -1 ; }
            }
        }
        else
        {
            std::cout << options.help() << std::endl ;
            retval = -1 ;
        }

        hid_exit() ;
        exit( retval ) ;
    }
    catch ( const cxxopts::OptionException& e )
    {
        std::cout << "error parsing options: " << e.what() << std::endl ;
        exit( -1 ) ;
    }

    exit( retval ) ;
}