From f57c0ee618bdc3794a370ee264a8aea1bc550541 Mon Sep 17 00:00:00 2001 From: "Md. S. Khan" <31071149+msk-repo-0x4d@users.noreply.github.com> Date: Wed, 19 Apr 2023 12:47:09 +0530 Subject: [PATCH] updating Readme with more description to create dll --- src/win32/README.md | 86 +++++++++++++++++++++++++++++++++------------ 1 file changed, 63 insertions(+), 23 deletions(-) diff --git a/src/win32/README.md b/src/win32/README.md index 6b3957df0..1d2ac2dcf 100644 --- a/src/win32/README.md +++ b/src/win32/README.md @@ -1,41 +1,81 @@ # Instructions to compile on Windows +To use this library on Windows, we have to generate `.dll` file out of this code. On successful build we will get a set of 3 files : +- modbus.dll +- libmodbus.a +- libmodbus.def -## Create a new Visual Studio project with the library included +You use `libmodbus.a` when you write your code and compile. While running your executable you use `modbus.dll` either by copying it in the same folder where executable is or by adding `path-to-modbus.dll` in the `ENVIRONMENT VARIABLES - PATH` of Windows. -Download the latest version of libmodbus source code from Github + +Currently, to compile and build this code you have 3 major options. + +1. You can use `Visual Studio` and create a project from `modbus.vcproject` in `src/win32` folder +2. Use some other IDE and import this as a `Visual Studio Project` in that IDE +3. Create a `dll project` in any IDE and build the code from scratch (this option comes if import is not available or successful) + + +## First do this + +In all three cases you have to do the following steps : + +- Download the latest version of libmodbus source code from Github `https://github.com/stephane/libmodbus` -> Code -> Download ZIP. -Once the archive is decompressed, launch a Windows terminal (`cmd`) in +- Once the archive is decompressed, launch a Windows terminal (`cmd`) in `src/win32` directory and run `cscript configure.js`. -1. copy the file `config.h` from `src/win32` to `src`. -2. create a new 'Console App' project under Visual Studio. -3. create a new directory called `libmodbus` inside your VS project (same level +- Copy the generated file `config.h` from `src/win32` to `src`. + +- Proceed with one of the 3 options below + + +## Option 1: Create a new Visual Studio project with the library included + +1. create a new 'Console App' project under Visual Studio. +2. create a new directory called `libmodbus` inside your VS project (same level as the `.vcxproj` file). -4. copy all `*.c` and `*.h` from libmodbus `src` in the new `libmodbus` folder +3. copy all `*.c` and `*.h` from libmodbus `src` in the new `libmodbus` folder of your VS project. -5. copy `modbus.rc` in your VS project (same level as the `.vcxproj` file). -6. drag and drop `libmodbus/*.c` files (4) in *Solution Explorer -> Source Files*. -7. drag and drop `libmodbus/*.h` files (8) in *Solution Explorer -> Header Files*. -8. drag and drop `modbus.rc` file in *Solution Explorer -> Resource Files*. -9. check path is `#include "modbus-version.h"` in `modbus.rc`. -10. in the **Property Pages** of the project *Configuration Properties -> C/C++ +4. copy `modbus.rc` in your VS project (same level as the `.vcxproj` file). +5. drag and drop `libmodbus/*.c` files (4) in *Solution Explorer -> Source Files*. +6. drag and drop `libmodbus/*.h` files (8) in *Solution Explorer -> Header Files*. +7. drag and drop `modbus.rc` file in *Solution Explorer -> Resource Files*. +8. check path is `#include "modbus-version.h"` in `modbus.rc`. +9. in the **Property Pages** of the project *Configuration Properties -> C/C++ -> General -> Additional Include Directories*, add `libmodbus` folder. -11. in the **Property Pages** of the project *Configuration Properties -> +10. in the **Property Pages** of the project *Configuration Properties -> Resources -> Additional Include Directories*, add `libmodbus` folder. -12. in the **Property Pages** of the project *Configuration Properties -> Linker +11. in the **Property Pages** of the project *Configuration Properties -> Linker -> Input*, define `ws2_32.lib`. -13. if required, add `_CRT_SECURE_NO_WARNINGS` to *C/C++ -> Preprocessor -> +12. if required, add `_CRT_SECURE_NO_WARNINGS` to *C/C++ -> Preprocessor -> Preprocessor Definitions*. -## Create a libmodbus DLL -This directory contains the project file for Visual Studio to build `modbus.dll` -and import library `modbus.lib`. +## Option 2: Import as Visual Studio project in any other IDE + +After you have generated `config.h` file using cscript and moved it to `src` folder, check in your IDE if there is an option to `import Visual Studio project` (CodeBlocks has it). + +1. Select `modbus.vcproject` as file to import from (this file is in `src/win32` folder). You might get some errors while importing but check the severity of the error before proceeding. +2. Build the project and you will get set of 3 files in `src/win32`(`modbus.dll`, `libmodbus.a`, `libmodbus.def`). + + +## Option 3: Build the library as DLL project + +After you have generated `config.h` file using `cscript` and copied it to `src` folder, + +1. Create a new project as DLL (Dynamic Link Library) and select `src` as the project directory +2. Delete generated `.c` `.cpp` and `.h` files (Codeblocks generated `main.cpp` and `main.h` which have to be deleted). +3. Add all the .c and .h files of libmodbus to this project as source and header files. +4. Add `src` as the `include directory` of the project (we still don't have separate `include directory`). +5. Add `ws2_32` library to the linker library +6. On successful build, set of 3 files (`modbus.dll`, `libmodbus.a`, `libmodbus.def`) will be generated in `bin/Debug` or somewhere similar. -In the Windows terminal, run `cscript configure.js` to generate: -- `config.h` -- `modbus-version.h` are generated using configure.js. +# Using generated library -To write... +1. To use the generated library create a separate `Console project`. +2. Add the `src` folder of libmodbus library as the `Include directory` for your project or use the `libmodbus` directory that has all the header files. +3. Link `libmodbus.a` in linker setting before generating the `.exe` file for your project. +4. Build the project to generate an `.exe` file for this project. +5. For running the `.exe` file of your test project, place the `modbus.dll` in the same folder as the `.exe` file. Or, alternatively add the path to `modbus.dll` in the `ENVIRONMENT VARIABLES - PATH` in Windows. +6. Run your `.exe` file