When I use IP521-64 module, I encounter a problem. First I use ActiveX control driver(IP521.ocx, file time: 2002 ), I found the module can't transmit binary data, even I had set "binary" in the control. It can only transmit ascii data. Then I changed to use Dll for windows. But it works very unstable. Some time it can work perfectly , Some times it will transmit wrong data. When I check the output using oscilloscope, I found the baud rate is wrong. Finally I tried to use generic control, the result is almost same as using dll. When I use the demo program provided by the Dll driver, I found the baud rate is not stable. After I set a baud rate, I read the baud rate, it is right. But when I set other parameter, the baud rate changed. I don't know where I do wrong.
Submitted by rm1872 on Thu, 2011-03-10 00:25