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发明授权
CN101287244B 一种采用全功能串口进行双处理器互唤醒的方法与系统 有权 无效申请 无效口审

一种采用全功能串口进行双处理器互唤醒的方法与系统
摘要：
本发明提供一种采用全功能串口进行双处理器互唤醒的方法与系统，所述方法包括：连接唤醒处理器的DTR管脚与被唤醒处理器的DSR管脚；连接唤醒处理器的DSR管脚与被唤醒处理器的DTR管脚；检测唤醒处理器的DSR管脚的电平是否有效；如果无效，则通过唤醒处理器的DTR管脚向被唤醒处理器的DSR管脚发送唤醒脉冲；被唤醒处理器的DSR管脚接收该唤醒脉冲，并将被唤醒处理器的DTR管脚电平置为有效。本方案基于现有串口的管脚，不需要改变现有管脚的输入输出状态，仅需要重新定义全功能串口的DSR和DTR的功能，以进行双处理器的互唤醒。是一种简单有效的双处理器互唤醒方式。
摘要（英）：

The invention provides a method which adopts a full function serial port for mutual wakeup of a dual processor and a system thereof. The method includes that a DTR pin of a wakeup processor and a DSR pin of a waken-up processor are connected; a DSR pin of the wakeup processor and a DTR pin of the waken-up processor are connected; whether electric level of the DSR pin of the wakeup processor is effective or not is detected and if not, wakeup impulse is sent through the DTR pin of the wakeup processor to the DSR pin of the waken-up processor; the DSR pin of the waken-up processor receives the wakeup impulse and changes the electric level of the DTR pin of the waken-up processor to be effective. Based on the current pins of serial ports, the proposal of the invention needs not to change the input status and the output status of the current pins but needs to redefine the functions of DSR and DTR of the full function serial ports to conduct the mutual wakeup of the dual processor; the method of the invention is the simple and effective mutual wakeup method for the dual processor.

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