This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
用MDK做ECG开发时，PC软件上总显示Port disconnect,单实际是连着的，而且串口确实被占用的？可能是什么原因，还有就是这个例程code.google.com/.../%E9%92%88%E5%AF%B9%E6%88%91%E8%BF%99%E4%B8%AA%E6%9D%BF%E5%AD%90%E6%9C%89%E4%BB%80%E4%B9%88%E9%9C%80%E8%A6%81%E6%94%B9%E7%9A%84%E5%90%97？基本不能显示出波形
PC上的软件是什么？是MDK自带了上位机软件吗？串口并不存在物理连接的检测，除非双方发数据握手来确认对方的存在。
