Question

我遇到了一些arduino代码问题。即时通讯使用我找到的以太网教程代码和我发现的一些红外发射器和接收器代码，我试图将它们结合起来。

http://www.ladyada.net/learn/sensors/ir.html

http://g33k.blogspot.com/2010/09/arduino-data-webserver-sample-web.html

这两个代码都可以自行运行。

代码编译但是当我调用以下void IRDetector（）时，它不起作用。我调试了它，到目前为止我发现当我使用变量uint8_t或uint16_t（香港专业教育学院尝试用int和long替换它们）。我是否必须导入和库才能使用uint8_t？有什么想法吗？

任何帮助都将不胜感激。

 uint16_t pulses[100][2];  // pair is high and low pulse 
   uint8_t currentpulse = 0; // index for pulses we're storing

    uint8_t highpulse, lowpulse;  // temporary storage timing

      void IRDetectCode(void)
   {
    while(true){

highpulse = lowpulse = 0; // start out with no pulse length

while (IRpin_PIN & (1 << IRpin)) {
  // pin is still HIGH

  // count off another few microseconds
  highpulse++;
  delayMicroseconds(RESOLUTION);

  // If the pulse is too long, we 'timed out' - either nothing
  // was received or the code is finished, so print what
  // we've grabbed so far, and then reset
  if ((highpulse >= MAXPULSE) && (currentpulse != 0)) {
     Serial.print(" usec, ");
  //  printpulses();
    //currentpulse=0;
    return;
  }
}
// we didn't time out so lets stash the reading
pulses[currentpulse][0] = highpulse;

// same as above
while (! (IRpin_PIN & _BV(IRpin))) {
  // pin is still LOW
   Serial.print(" usec, ");
  lowpulse++;
  delayMicroseconds(RESOLUTION);
  if ((lowpulse >= MAXPULSE)  && (currentpulse != 0)) {
  //  printpulses();
  //  currentpulse=0;
    return;
  }
}
//pulses[currentpulse][1] = lowpulse;

          // we read one high-low pulse successfully, continue!
       currentpulse++;
  }
    }

  void printpulses(void) {
        Serial.println("\n\r\n\rReceived: \n\rOFF \tON");
         for (uint8_t i = 0; i < currentpulse; i++) {
            Serial.print(pulses[i][0] * RESOLUTION, DEC);
            Serial.print(" usec, ");
            Serial.print(pulses[i][1] * RESOLUTION, DEC);
            Serial.println(" usec");
           }

         // print it in a 'array' format
     Serial.println("int IRsignal[] = {");
     Serial.println("// ON, OFF (in 10's of microseconds)");
         for (uint8_t i = 0; i < currentpulse-1; i++) {
             Serial.print("\t"); // tab
             Serial.print(pulses[i][1] * RESOLUTION / 10, DEC);
             Serial.print(", ");
            Serial.print(pulses[i+1][0] * RESOLUTION / 10, DEC);
           Serial.println(",");
        }
          Serial.print("\t"); // tab
     Serial.print(pulses[currentpulse-1][1] * RESOLUTION / 10, DEC);
      Serial.print(", 0};");
        }

Answer 1

uint8_t是8位的无符号整数。在Arduino中，它被称为“字节”，所以你可以这样使用它：

for (byte i = 0; i < currentpulse; i++) {....

它比使用Arduino的“int”类型（== int16_t）或“unsigned int”（== uint16_t）要好得多，因为ATmega328是8位的。因此处理8位var更快（很多）。

我希望它可以提供帮助。

Arduino uint8_t变量

1 个答案: