我正在尝试编写c ++控制台和Arduino uno之间的接口。我想通过串口发送一个字符或整数到arduino。我写了一些代码(见下文),LED闪烁很短的时间。我希望它能继续存在,直到我输入另一个字母或数字。如何才能做到这一点?我使用了Arduino playground中的SerialClass.h和SerialClass.cpp。几个小时的google-fu无济于事。
这是c ++代码(Arduino代码如下):
#include <stdio.h>
#include <tchar.h>
#include "SerialClass.h" // Library described above
#include <string>
#include <iostream>
using namespace std;
bool weiter = true;
int _tmain(int argc, _TCHAR* argv[])
{
cout << "Welcome to the serial test app!\n\n" << endl;
Serial* SP = new Serial("COM4"); // adjust as needed
if (SP->IsConnected())
//printf("We are connected\n");
cout << "We are connected!\n" << endl;
char sendingData[256] = "";
int dataLength = 256;
int writeResult = 0;
while (weiter == true) {
if (SP->IsConnected()) {
cout << "Press o to turn LED on! Press anything else to turn LED off! " << endl;
cin >> sendingData;
writeResult = SP->WriteData(sendingData, dataLength);
cout << "Data send: " << sendingData << endl;
}
}
return 0;
}
这是Arduino代码:
int incomingByte = 0; // for incoming serial data
int led = 13;
void setup() {
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
pinMode(led, OUTPUT);
Serial.println("This is my LED program; press o to turn on the LED");
}
void loop() {
// send data only when you receive data:
if (Serial.available() > 0) {
// read the incoming byte:
incomingByte = Serial.read();
// say what you got:
//Serial.print("I received: ");
//Serial.println(incomingByte, DEC);
if (incomingByte == 111) //111 entspricht dem Buchstaben o
{
digitalWrite(led, HIGH);
Serial.print("I received: ");
Serial.println(incomingByte, DEC);
Serial.println("LED is turned on");
}
if (incomingByte != 111)
{ digitalWrite(led, LOW);
Serial.print("I received: ");
Serial.println(incomingByte, DEC);
Serial.println("LED is turned off");
}
}
}
答案 0 :(得分:0)
cin
是行缓冲的。这意味着您只能在按Enter键时获取数据。而且输入也是一个角色。通常为0x0a
或'\n'
。这不是o
所以你的领导关闭了。
我要做的是让你的arduino忽略空白:
if(incomingByte == `\n` || incomingByte == `\r` || incomingbyte == ' ')
return;
还会发生每次发送256个字符的原因,因为dataLength
永远不会更改。所以做一些聪明的事情srtlen
;)。
答案 1 :(得分:0)
Thanks David for your comment on my question.
I found the answer by myself. I used serial.WriteData("o",1);
Here is the complete code of my main.cpp. Just in case it might be useful for others:
#include <stdio.h>
#include <tchar.h>
#include "SerialClass.h" // Library described above
#include <string>
#include <iostream>
using namespace std;
bool weiter = true;
int dummy1 = 0;
int _tmain(int argc, _TCHAR* argv[]) {
cout << "*** This is my Arduino LED app! ***\n" << endl;
//Serial* SP = new Serial("COM4");
//Serial serial("COM4");
Serial serial("COM4");
if (serial.IsConnected())
//printf("We are connected\n");
cout << "We are connected!\n" << endl;
while (weiter == true) {
cout << "Press 1 for LED on; press 0 for LED off!" << endl;
cin >> dummy1;
if (dummy1 == 1) {
if (serial.IsConnected()){
serial.WriteData("o",1);
cout << "LED is on!" << endl;
cout << "Do you want to continue? 1 for continue, 0 for exit!" << endl;
//printf("\nData sent successfully!\n");
cin >> weiter;
}
}
else {
serial.WriteData("p", 1 );
cout << "LED is off!" << endl;
cout << "Do you want to continue? 1 for continue, 0 for exit!" << endl;
cin >> weiter;
}
}
if (weiter == 1)
{
weiter = true;
}
if (weiter == 0) {
weiter = false;
return 0;
}
}