Arduino 串行中断 [英] Arduino Serial Interrupts

问题描述

我正在研究 Arduino Mega 2560 项目.在 Windows 7 PC 上，我使用的是 Arduino1.0 IDE.我需要建立一个波特率为 115200 的串行蓝牙通信.我需要在 RX 有数据时接收中断.我见过的每段代码都使用轮询"，即在 Arduino 的循环中放置一个 Serial.available 条件.我如何在 Arduino 的循环中为中断及其服务程序替换这种方法?似乎 attachInterrupt() 没有为此目的提供.我依靠中断将 Arduino 从睡眠模式唤醒.

I am working on an Arduino Mega 2560 project. At a Windows 7 PC I am using the Arduino1.0 IDE. I need to establish a serial Bluetooth communication with a baud rate of 115200. I need to receive an interrupt when data is available at RX. Every piece of code I have seen use "polling", which is placing a condition of Serial.available inside Arduino’s loop. How can I replace this approach at Arduino’s loop for an Interrupt and its Service Routine? It seems that attachInterrupt() does not provides for this purpose. I depend on an Interrupt to awake the Arduino from sleep mode.

我开发了这个简单的代码，可以打开连接到引脚 13 的 LED.

I have developed this simple code that is supposed to turn on a LED connected to the pin 13.

    #include <avr/interrupt.h> 
    #include <avr/io.h> 
    void setup()
    {
       pinMode(13, OUTPUT);     //Set pin 13 as output

       UBRR0H = 0;//(BAUD_PRESCALE >> 8); // Load upper 8-bits of the baud rate value into the high byte of the UBRR register 
       UBRR0L = 8; // Load lower 8-bits of the baud rate value into the low byte of the UBRR register 
       UCSR0C |= (1 << UCSZ00) | (1 << UCSZ10); // Use 8-bit character sizes 
       UCSR0B |= (1 << RXEN0) | (1 << TXEN0) | (1 << RXCIE0);   // Turn on the transmission, reception, and Receive interrupt      
    }

    void loop()
    {
      //Do nothing
    }

    ISR(USART0_RXC_vect)
    {    
      digitalWrite(13, HIGH);   // Turn the LED on          
    }

问题是子程序永远不会被服务.

The problem is that the subroutine is never served.

推荐答案

我终于找到了我的问题.我通过 USART0_RX_vect 更改了中断向量USART0_RXC_vect".我还添加了 interrupts(); 以启用全局中断，并且运行良好.

Finally I have found my problem. I changed the interruption vector "USART0_RXC_vect" by USART0_RX_vect. Also I added interrupts(); to enable the global interrupt and it is working very well.

代码是:

#include <avr/interrupt.h> 
#include <avr/io.h> 
void setup()
{
   pinMode(13, OUTPUT); 

   UBRR0H = 0; // Load upper 8-bits of the baud rate value into the high byte of the UBRR register 
   UBRR0L = 8; // Load lower 8-bits of the baud rate value into the low byte of the UBRR register 
   UCSR0C |= (1 << UCSZ00) | (1 << UCSZ10); // Use 8-bit character sizes 
   UCSR0B |= (1 << RXEN0) | (1 << TXEN0) | (1 << RXCIE0);   // Turn on the transmission, reception, and Receive interrupt      
   interrupts();
}

void loop()
{

}

ISR(USART0_RX_vect)
{  
  digitalWrite(13, HIGH);   // set the LED on
  delay(1000);              // wait for a second
}

感谢您的回复！！！！

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