C++ ComHelper

C++ Links

https://keenjin.github.io/2020/04/DXRender/

https://github.com/lili2012/Introduction-to-3D-Game-Programming-with-DirectX-11

http://www.d3dcoder.net/d3d11.html

https://docs.microsoft.com/zh-cn/windows/win32/direct3ddxgi/dxgi-1-3-improvements?redirectedfrom=MSDN

https://blog.csdn.net/Quellaaa/article/details/80328694

https://blog.csdn.net/baidu_28029719/article/details/108993377

https://blog.csdn.net/qq_17351161/article/details/89607458

https://www.cnblogs.com/zhangbaochong/category/780451.html?page=2

#pragma once
#include <WinSock2.h>
#include <process.h>
#include <iostream>

typedef unsigned char byte;
using namespace std;

typedef struct {
    HANDLE hCom;
    uint32_t baudrate;
    uint32_t bytesize;
    char parity;
    uint32_t stopbit;
}rs232_device;

class  ComeHelper
{
public:
    static void init();
    static void send();
    static void dispose();
};

#include "Comer.h"

int set_opt(HANDLE hFile, int nSpeed, int nBits, char nEvent, int nStop)
{
    DCB dcb;
    COMMTIMEOUTS timeouts;
    //set input buf and output buf
    SetupComm(hFile, 512, 512);
    //set read timeout
    timeouts.ReadIntervalTimeout = 0;
    timeouts.ReadTotalTimeoutMultiplier = 0;
    timeouts.ReadTotalTimeoutConstant = 0;
    //set write timeout
    timeouts.WriteTotalTimeoutMultiplier = 0;
    timeouts.WriteTotalTimeoutConstant = 0;
    SetCommTimeouts(hFile, &timeouts);
    //store current setting
    if (0 == GetCommState(hFile, &dcb)) {
        return -1;
    }
    //set BaudRate
    switch (nSpeed) {
    case 2400:
        dcb.BaudRate = CBR_2400;
        break;
    case 4800:
        dcb.BaudRate = CBR_4800;
        break;
    case 115200:
        dcb.BaudRate = CBR_115200;
        break;
    default:
        dcb.BaudRate = CBR_9600;
        break;
    }
    //set ByteSize
    switch (nBits) {
    case 7:
        dcb.ByteSize = 7;
        break;
    case 8:
        dcb.ByteSize = 8;
        break;
    default:
        dcb.ByteSize = 8;
        break;
    }
    //set Parity
    switch (nEvent) {
    case 'N':
        dcb.Parity = NOPARITY;
        break;
    case 'O':
        dcb.Parity = ODDPARITY;
        break;
    case 'E':
        dcb.Parity = EVENPARITY;
        break;
    }
    //set StopBit
    switch (nStop) {
    case 1:
        dcb.StopBits = ONESTOPBIT;
        break;
    case 2:
        dcb.StopBits = TWOSTOPBITS;
        break;
    }
    if (0 == SetCommState(hFile, &dcb)) {
        return -1;
    }
    return 0;
}

rs232_device rs232_dev;

void Comer::init() {
    //此处静态成员不能使用 this->

    rs232_dev.baudrate = 115200;
    rs232_dev.bytesize = 8;
    rs232_dev.parity = 'N';
    rs232_dev.stopbit = 1;
    //打开串口4
    rs232_dev.hCom = CreateFile("COM6", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
    if (rs232_dev.hCom != INVALID_HANDLE_VALUE) {
        printf("Open COM6 OK!\n");
    }
    else
        printf("Open COM6 Fail!\n");
    //通讯设置
    if (-1 == set_opt(rs232_dev.hCom,
        rs232_dev.baudrate,
        rs232_dev.bytesize,
        rs232_dev.parity,
        rs232_dev.stopbit))
    {
        if (INVALID_HANDLE_VALUE != rs232_dev.hCom)
            CloseHandle(rs232_dev.hCom);
    }
}

void Comer::send()
{
    unsigned char readBuf[1024] = { 0 };
    int count = 5;

    byte bts[5] = { 1,0xE1,1,0,1 };
    DWORD writesize = 0;
    WriteFile(rs232_dev.hCom, bts, count, &writesize, NULL);
}

void Comer::dispose()
{
    CloseHandle(rs232_dev.hCom);
    rs232_dev.hCom = nullptr;
}