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我在处理一些 arduino 代码时遇到了问题。我使用我找到的以太网教程代码和我找到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

两种代码都可以自己正常工作。

代码可以编译，但是当我调用以下 void IRDetector() 时，它不起作用。我已经对其进行了调试，到目前为止，我发现当我使用变量 uint8_t 或 uint16_t 时（我尝试用整数和长整数替换它们）。我必须导入和库才能使用 uint8_t 吗？有什么想法吗？

任何帮助，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};");
        }
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1 回答 1

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uint8_t 是一个 8 位的无符号整数。在 Arduino 中，它被称为“字节”，因此您可以这样使用它：

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 会更快（很多）。

我希望它可以帮助。

于 2012-05-30T12:06:41.087 回答