我正在制作一个 arduino 项目，该项目从一些Atlas Scientific探测器中读取一些值。有关于如何使用串行监视器仅与一个设备通信的示例代码，我正在尝试将其移植到“选择”我想使用串行监视器与之交谈的探测器。问题是示例代码只是等待循环（）中的串行输入。它看起来像这样：
void loop(){ //here we go....
if (input_stringcomplete){ //if a string from the PC has been recived in its entierty
Serial2.print(inputstring); //send that string to the Atlas Scientific product
inputstring = ""; //clear the string:
input_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the PC
}
if (sensor_stringcomplete){ //if a string from the Atlas Scientific product has been recived in its entierty
Serial.println(sensorstring); //send that string to to the PC's serial monitor
sensorstring = ""; //clear the string:
sensor_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the Atlas Scientific product
}
}
所以基本上，你输入一个命令并按回车，它会将命令发送到探测器。探测器发挥了作用，并向您报告了一个值。很简单。我正在尝试使用案例语句来选择我想与之交谈的探测器（还有一个不使用此协议的温度传感器）。我正在尝试在 case 语句中使用 while 循环来与我的外围设备对话。
void loop(){
// read the selection
if (Serial.available()>0) {
int inByte = Serial.read();
switch(inByte) {
case '1':
//read pH
Serial.print("pH");
while (inputstring != "break"){
if (input_stringcomplete){ //if a string from the PC has been recived in its entierty
Serial3.print(inputstring); //send that string to the Atlas Scientific product
Serial.print(inputstring);
inputstring = ""; //clear the string:
input_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the PC
}
if (sensor_stringcomplete){ //if a string from the Atlas Scientific product has been recived in its entierty
Serial.println(sensorstring); //send that string to to the PC's serial monitor
sensorstring = ""; //clear the string:
sensor_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the Atlas Scientific product
}
}
case '2':
//read EC
Serial.print("EC");
while (inputstring != "break"){
if (input_stringcomplete){ //if a string from the PC has been recived in its entierty
Serial2.print(inputstring); //send that string to the Atlas Scientific product
Serial.print(inputstring); //debug
inputstring = ""; //clear the string:
input_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the PC
}
if (sensor_stringcomplete){ //if a string from the Atlas Scientific product has been recived in its entierty
Serial.println(sensorstring); //send that string to to the PC's serial monitor
sensorstring = ""; //clear the string:
sensor_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the Atlas Scientific product
}
}
.
.
.
}
就像我说的，我正在尝试使用 while 循环来运行与各个传感器的各个终端串行通信，并且能够在终端中键入“break”以返回我的案例语句并选择另一个传感器。while 循环的想法根本不起作用。我添加了调试行来回显我的命令，但它甚至没有这样做。有没有更好的方法来做这些嵌套循环？
这是完整的程序供参考。
/*
This software was made to demonstrate how to quickly get your Atlas Scientific product running on the Arduino platform.
An Arduino MEGA 2560 board was used to test this code.
This code was written in the Arudino 1.0 IDE
Modify the code to fit your system.
**Type in a command in the serial monitor and the Atlas Scientific product will respond.**
**The data from the Atlas Scientific product will come out on the serial monitor.**
Code efficacy was NOT considered, this is a demo only.
The TX3 line goes to the RX pin of your product.
The RX3 line goes to the TX pin of your product.
Make sure you also connect to power and GND pins to power and a common ground.
Open TOOLS > serial monitor, set the serial monitor to the correct serial port and set the baud rate to 38400.
Remember, select carriage return from the drop down menu next to the baud rate selection; not "both NL & CR".
*/
#include <OneWire.h>
#include <DallasTemperature.h>
// Data wire is plugged into pin 30 on the Arduino
#define ONE_WIRE_BUS 32
#define TEMPERATURE_PRECISION 9
// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
// arrays to hold device address
DeviceAddress insideThermometer;
String inputstring = ""; //a string to hold incoming data from the PC
String sensorstring = ""; //a string to hold the data from the Atlas Scientific product
boolean input_stringcomplete = false; //have we received all the data from the PC
boolean sensor_stringcomplete = false; //have we received all the data from the Atlas Scientific product
String inputString = ""; // a string to hold incoming data
boolean stringComplete = false; // whether the string is complete
int numberOfDevices; // Number of temperature devices found
DeviceAddress tempDeviceAddress;
void setup(void){ //set up the hardware
Serial.begin(9600); //set baud rate for the hardware serial port_0 to 38400
Serial3.begin(38400); //set baud rate for software serial port_3 to 38400
Serial2.begin(38400); //set baud rate for software serial port_3 to 38400
inputstring.reserve(5); //set aside some bytes for receiving data from the PC
sensorstring.reserve(30); //set aside some bytes for receiving data from Atlas Scientific produc
// locate devices on the bus
Serial.print("Locating temperature devices...");
sensors.begin();
// Grab a count of devices on the wire
numberOfDevices = sensors.getDeviceCount();
Serial.print("Found ");
Serial.print(sensors.getDeviceCount(), DEC);
Serial.println(" devices.");
for(int i=0;i<numberOfDevices; i++)
{
if(sensors.getAddress(tempDeviceAddress, i))
{
sensors.setResolution(tempDeviceAddress, TEMPERATURE_PRECISION);
}
}
Serial.println("Type 1 to read pH, 2 to read EC, or 3 to read temperature.");
}
//for reading pH/EC
void serialEvent() { //if the hardware serial port_0 receives a char
char inchar = (char)Serial.read(); //get the char we just received
inputstring += inchar; //add it to the inputString
if(inchar == '\r') {input_stringcomplete = true;} //if the incoming character is a <CR>, set the flag
input_stringcomplete = true;
}
void serialEvent3(){ //if the hardware serial port_3 receives a char
char inchar = (char)Serial3.read(); //get the char we just received
sensorstring += inchar; //add it to the inputString
if(inchar == '\r') {sensor_stringcomplete = true;} //if the incoming character is a <CR>, set the flag
}
void serialEvent2(){ //if the hardware serial port_3 receives a char
char inchar = (char)Serial2.read(); //get the char we just received
sensorstring += inchar; //add it to the inputString
if(inchar == '\r') {sensor_stringcomplete = true;} //if the incoming character is a <CR>, set the flag
}
//for reading temp
void printTemperature(DeviceAddress deviceAddress)
{
// method 2 - faster
float tempC = sensors.getTempC(deviceAddress);
Serial.print("Temp C: ");
Serial.print(tempC);
Serial.print(" Temp F: ");
Serial.println(DallasTemperature::toFahrenheit(tempC)); // Converts tempC to Fahrenheit
}
void printAddress(DeviceAddress deviceAddress)
{
for (uint8_t i = 0; i < 8; i++)
{
if (deviceAddress[i] < 16) Serial.print("0");
Serial.print(deviceAddress[i], HEX);
}
}
void loop(){ //here we go....
// read the selection
int r = 0;
if (Serial.available()>0) {
int inByte = Serial.read();
switch(inByte) {
case '1':
//read pH
Serial.print("pH");
while (inputstring != "break"){
if (input_stringcomplete){ //if a string from the PC has been recived in its entierty
Serial3.print(inputstring); //send that string to the Atlas Scientific product
Serial.print(inputstring); //debug
inputstring = ""; //clear the string:
input_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the PC
}
if (sensor_stringcomplete){ //if a string from the Atlas Scientific product has been recived in its entierty
Serial.println(sensorstring); //send that string to to the PC's serial monitor
sensorstring = ""; //clear the string:
sensor_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the Atlas Scientific product
}
}
case '2':
//read EC
Serial.print("EC");
while (inputstring != "break"){
if (input_stringcomplete){ //if a string from the PC has been recived in its entierty
Serial2.print(inputstring); //send that string to the Atlas Scientific product
Serial.print(inputstring); //debug
inputstring = ""; //clear the string:
input_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the PC
}
if (sensor_stringcomplete){ //if a string from the Atlas Scientific product has been recived in its entierty
Serial.println(sensorstring); //send that string to to the PC's serial monitor
sensorstring = ""; //clear the string:
sensor_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the Atlas Scientific product
}
}
case '3':
// call sensors.requestTemperatures() to issue a global temperature
// request to all devices on the bus
Serial.print("Requesting temperatures...");
sensors.requestTemperatures(); // Send the command to get temperatures
Serial.println("DONE");
// Loop through each device, print out temperature data
for(int i=0;i<numberOfDevices; i++)
{
// Search the wire for address
if(sensors.getAddress(tempDeviceAddress, i))
{
// Output the device ID
Serial.print("Temperature for device: ");
Serial.println(i,DEC);
// It responds almost immediately. Let's print out the data
printTemperature(tempDeviceAddress); // Use a simple function to print out the data
}
//else ghost device! Check your power requirements and cabling
}
break;
}
}
}
谢谢，迈克