读书 串口事件疑问
读中发觉arduino可以使用伪事件serial.Event()解决串口数据传输及时响应。不解内容有二:
一。书中P114程序中没有启动中断语句(类似。。attachinterrupt()的添加中断),后面如何响应终端呢。
二。P113页,“对于MEGA控制器还可以使用以下形式。 void serialEvent1(){}void serialEvent2(){}void serialEvent3(){}"
如何针对切入具体的对应中断,没有对应内容和事例。
以上内容还需大师指教,先谢了。
书中有论述,这是个伪事件,并不能实时响应 伪中断,两次loop之间执行一次serial.Event(),可以看官方的函数说明 是否可以理解为,执行顺序为loop ---事件----loop这样一个循环?? 在arduino安装目录下hardware\arduino\avr\cores\arduino文件夹里我找到main.cpp这个文件
/*
main.cpp - Main loop for Arduino sketches
Copyright (c) 2005-2013 Arduino Team.All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA02110-1301USA
*/
#include <Arduino.h>
// Declared weak in Arduino.h to allow user redefinitions.
int atexit(void (* /*func*/ )()) { return 0; }
// Weak empty variant initialization function.
// May be redefined by variant files.
void initVariant() __attribute__((weak));
void initVariant() { }
void setupUSB() __attribute__((weak));
void setupUSB() { }
int main(void)
{
init();
initVariant();
#if defined(USBCON)
USBDevice.attach();
#endif
setup();
for (;;) {
loop();
if (serialEventRun) serialEventRun();
}
return 0;
}
由此得知,串口事件在两次loop之间执行。
应该没错。
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