C arduino串行连接时间

Question

最初，我使用autohotkey与Arduino进行交流，但是我发现几个小时没有将任何东西发送给Arduino（Arduino发送一次"心跳"），连接将冻结或失败。

现在，我正在尝试通过使用RS-232库的C 程序来控制Arduino。

但是我遇到了同样的问题。该程序每二十秒钟将Arduino贴上一个，然后应该用少量信息来报告Arduino。几个小时后，连接死亡，我的C 程序只是坐在那里，没有响应。Arduino有一个看门狗，我可以验证它在连接不在时仍在工作，所以我相信我的问题在于某种固有的超时与串行的固有超时...除了积极使用连接。

我感谢任何帮助弄清楚我需要做的事情才能保持串行连接的活力，计算机必须能够将数据发送到Arduino 24/7。

我正在编译Code::Blocks，并在Windows 7上运行该程序。

我对C 或C不太熟悉，因此，如果您在程序中发现其他愚蠢的事情，请让我知道。

main.cpp

/**************************************************
  File: main.cpp
  Purpose: Simple demo that receives characters from
           the serial port and print them on the
           screen.
**************************************************/
#include <stdlib.h>
#include <iostream>
#ifdef _WIN32
    #include <Windows.h>
#else
    #include <unistd.h>
#endif
#include "rs232.h"
using namespace std;
int main()
{
    int debug = 0;
    int i = 0, n,
    cport_nr = 5,        /* /dev/ttyS5 (COM6 on Windows) */
    bdrate = 9600;       /* 9600 baud */
    unsigned char buf[4096];
    if(OpenComport(cport_nr, bdrate))
    {
        cout << "Can not open comportn";
        return(0);
    }
    while(1)
    {
        if (debug)
        {
            printf("Entering While(1) loop. n");
        }
        n = PollComport(cport_nr, buf, 4095);
        if(n > 0)
        {
            buf[n] = 0;   /* always put a "null" at the end of a string! */
            /* for(i=0; i < n; i++)
            {
                if(buf[i] < 32)  // replace unreadable control-codes by dots
                {
                  buf[i] = '.';
                }
            } */
            //printf("nnnreceived %i bytes: %snn", n, (char *)buf);
            cout << endl << endl << endl << (char *)buf;
        }
        if (SendByte(cport_nr, 83))
        {
            printf("nnSending data didn't work. nn");
        }
        else
        {
            cout << "nSent [S]n";
        }
        i = 0;
        #ifdef _WIN32
            Sleep(10000);  /* It's ugly to use a sleeptimer, in a real program, change
                              the while-loop into a (interrupt) timerroutine. */
        #else
            usleep(10000000);  /* Sleep for 100 milliSeconds */
        #endif
    }
    return(0);
}

arduino文件

//
// SuiteLock v.2.1a
// By: Chris Bero ([e-mail])
// Last Updated: 11.4.2012
//
#include <Servo.h>
#include <avr/wdt.h>
// Pin Constants:
const int servoPin = 9;
const int doorbtn = 3;
// Not sure if I'm still going to use these...
const int ledGND = 4;
const int ledVCC = 5;
const int servDelay = 600; // The delay allowing for the servo to complete an action.
//Variables:
int doorState = 0;  // The value returned by the door button (0 or 1).
int servState = 90;  // The position of the servo in degrees (0 through 180).
unsigned long prevMillis = 0;
unsigned long progCycles = 0;
int serialByte = 0;
int lastSerial = 0;
int smallBlink = 0;
bool dostatus = false; // Determine whether to send sys status.
Servo serv;
// Set up the environment.
void setup()
{
    wdt_enable(WDTO_4S);
    pinMode(doorbtn, INPUT);
    pinMode(ledGND, OUTPUT);
    pinMode(ledVCC, OUTPUT);
    pinMode(servoPin, OUTPUT);
    digitalWrite(ledGND, LOW);
    serv.attach(servoPin);
    Serial.begin(9600);
    prevMillis = millis();
}
////////////////////////////////////////////////
// Statuser - Sends system status to Serial
/////////////////////////////////////////////
int statuser ()
{
    wdt_reset();
    Serial.println("[Start]"); //Start Of Transmission
    delay(15);
    unsigned long currentMillis = millis();
    refresh();
    Serial.print("tTime Alive: ");
    int hr = ((currentMillis/1000)/3600);
    int mn = (((currentMillis/1000)-(hr*3600))/60);
    int sc = ((currentMillis/1000)-(hr*3600)-(mn*60));
    Serial.print(hr);
    Serial.print(":");
    Serial.print(mn);
    Serial.print(":");
    Serial.println(sc);
    Serial.print("tNum of Program Cycles: ");
    Serial.println(progCycles);
    Serial.print("tAvg Cycles per Second: ");
    int cps = (progCycles/(currentMillis/1000));
    Serial.println(cps);
    Serial.print("tDoorState: ");
    Serial.println(doorState);
    Serial.print("tServo Position: ");
    Serial.println(servState);
    Serial.print("tLast Serial Byte: ");
    Serial.println(lastSerial);
    delay(15);
    Serial.println("[End]"); //End Of Transmission
    return(0);
}
////////////////////////
// Lock the door.
/////////////////////
int locker()
{
    wdt_reset();
    // Check the button states.
    refresh();
    // Make sure the door is closed.
    do
    {
        wdt_reset();
        delay(500);
        refresh();
    } while(doorState == LOW);
    // Turn on the locking LED during the servo movement.
    digitalWrite(ledVCC, HIGH);
    wdt_reset();
    // Tell the servo to turn to 20 degrees.
    serv.write(20);
    // Give the servo time to complete the turn.
    delay(servDelay);
    wdt_reset();
    // Turn the servo opp direction to reset.
    serv.write(90);
    // Wait for the servo to reach it's reset point.
    delay(servDelay);
    // Turn off the cool little LED.
    digitalWrite(ledVCC, LOW);
    // Call parents for 11pm checkup and tell them everything's A-OK.
    return(0);
}
/////////////////////////
// Unlock the door.
//////////////////////
int unlocker ()
{
    wdt_reset();
    // Check the pin states.
    refresh();
    // Turn on the status LED.
    digitalWrite(ledVCC, HIGH);
    wdt_reset();
    // Turn servo to 170 degrees to unlock the door.
    serv.write(170);
    // Wait for servo motion to complete.
    delay(servDelay);
    wdt_reset();
    // Reset the servo to 90 degrees.
    serv.write(90);
    // Wait for reset motion to complete.
    delay(servDelay);
    // Turn off LED.
    digitalWrite(ledVCC, LOW);
    return(0);
}
///////////////////////////////
// Refresh button states.
/////////////////////////////
void refresh ()
{
    wdt_reset();
    doorState = digitalRead(doorbtn);
    servState = serv.read();
}
///////////////////////
// Main function.
////////////////////
void loop()
{
    wdt_reset();
    // Blink the LED every so many turn overs of the function.
    if (smallBlink == 5)
    {
        smallBlink = 0;
        digitalWrite(ledVCC, HIGH);
        delay(300);
        digitalWrite(ledVCC, LOW);
    }
    // Status.
    if(dostatus == true)
    {
        unsigned long currentMillis = millis();
        if ((currentMillis - prevMillis) > 4000)
        {
            prevMillis = currentMillis;
            statuser();
        }
    }
    // Refresh button states.
    refresh();
    // Is the door closed and not locked? *Gasp*
    if ((doorState == LOW))
    {
        // Fix it.
        while (doorState == LOW)
        {
            wdt_reset();
            delay(500);
            refresh();
        }
        locker();
    }
    // Check for available communications.
    if (Serial.available() > 0)
    {
        // Reset the serialByte, done for debugging.
        serialByte = 0;
        wdt_reset();
        // Read the serialByte.
        serialByte = Serial.read();
        lastSerial = serialByte;
    }
    // Act on the byte data.
    if (serialByte == 'U')
    {
        // Let someone in.
        unlocker();
        // Wait for the door to change states.
        delay(1000);
    }
    if (serialByte == 'L')
    {
        locker();
        delay(1000);
    }
    if (serialByte == 'S')
    {
        statuser();
        delay(200);
    }
    // Clean serialByte for debugging.
    serialByte = 0;
    // Count through program cycles.
    progCycles++;
    smallBlink++;
}

我调整了C 程序以打开comport，发送" S"，然后关闭comport并等待。然后我将其循环循环，以便它可以继续打开和关闭端口。我希望这将使连接无法达到几个小时的标记和时间或其他时间。相反，该程序成功地循环一个小时，然后突然未能打开COM端口...这完全使我震惊，我不知道该怎么办。

如果Crazycasta是正确的，而这只是我的Arduino与笔记本电脑的连接，那么有没有办法重置连接而无需先重新启动计算机？

Answer 1

正如crazycasta所说，这是一个硬件问题。我能够通过删除我的arduino和计算机之间的9＆nbsp; ft（2.7＆nbsp; m）USB扩展线来解决问题。

截至今天早晨，连接已经活了十个小时，比以前的测试长七个小时。我希望可以肯定地说这是固定的。