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cpp_EPICS_Driver

A simple driver to interface the EPICS control system to C++

Installation

To install the driver, you need to have EPICS Base version 7.0.3 or later installed on your system. You can download EPICS Base from the EPICS website.

Once you have EPICS Base installed, you can build the driver by running the following commands:

git clone https://github.com/burkeds/cpp_EPICS_Driver.git cd cpp_EPICS_Driver $ make

This will build the testEpicsProxy executable, which you can modify and run to test the driver.

Usage

To use the driver in your own C++ code, you need to include the EpicsProxy.h header file and link against the libEpicsProxy.a library. Here's an example of how to use the driver to read the value of a PV:

#include "EpicsProxy.h"
#include <iostream>

#include <iostream>
#include <string>
#include <unistd.h>
#include <bitset>

#include "EpicsProxy.h"
#include "epicsCallbacks.h"

using namespace epics;

int main() {
    try {
        struct caConfig conf;

        conf.ca_addr_list = getenv("EPICS_CA_ADDR_LIST");
        conf.ca_auto_addr_list = getenv("EPICS_CA_AUTO_ADDR_LIST");
        conf.ca_conn_tmo = "30.0";
        conf.ca_beacon_period = "15.0";
        conf.ca_repeater_port = "5065";
        conf.ca_server_port = "5064";
        conf.ca_max_array_bytes = "16384";
        conf.ts_min_west = "360";

        //List of PVs to create
        std::string pvName = std::string(".VAL");
        std::string pvStatus = std::string(".MSTA");
        std::string pvReadback = std::string(".RBV");
        std::string pvStop = std::string(".STOP");
        std::vector<std::string> pvNames = {pvName, pvStatus, pvReadback, pvStop};

        //Initialize the EPICS context
        EpicsProxy proxy("name");
        proxy.init("sans:motor[sim_motor]:2-",
                  pvNames,
                  conf);

        //Add a monitor to the status PV
        proxy.add_monitor(pvStatus, &proxy, &epics::msta_monitor_callback);

        //Read the current position
        double pos = proxy.read_pv<double>(pvReadback);
        std::cout << "Current position: " << pos << std::endl;
        unsigned long stat = proxy.get_current_status();
        std::cout << "Status: " << stat << std::endl;

        //Write a new position
        proxy.write_pv<double>(pvName, 10.0);

        while (pos < 10.0) {
            pos = proxy.read_pv<double>(pvReadback);
            std::cout << "Current position: " << pos << std::endl;
            stat = proxy.get_current_status();
        std::cout << "Status: " << stat << std::endl;
            sleep(1.0);
        }

        //Read the final position
        std::cout << "Final position: " << proxy.read_pv<double>(pvReadback) << std::endl;
        stat = proxy.get_current_status();
        std::cout << "Status: " << stat << std::endl;

   
    } catch (const std::exception& e) {
        std::cerr << e.what() << std::endl;
    }
    return 0;
}

License
This project is released under the Unlicense. See the LICENSE file for details.