Hi, I have to use a Com port (Com3) through a USB serial converter to connect a MON51 at 37,5K. No problem to do that with the unique standard Com port (Com1) when configured at 38400 bauds through µVision2, but some WaitSate or DoState or ReadBlock Timeout errors appears with the new Com3 serial port. It seems the baudrate tolerance of USB serial port is not enough compare to standard serial. Is it possible to apply a non standard baudrate with Keil monitor driver ? How ? I already change baudrate through windows device manager : I modify .inf file using FTDI (device USB to serial) application note, but the baudrate selection through 'Device Manager' seems to be different than baudrate selection through 'Keil monitor driver'... Thx for help Julian
Julien; I have run into the same type problem with the Cygnal--I mean SiLabs EC2 box to their eval boards. I found the problem with the USB to serial adapter and my Laptop. The configuration will marginally work on my desktop. I threw away that adapter for another adapter that solved my problems. My low priced Laptop has no serial ports. At the same time I was working on some USB projects and bought the little CP2101 USB to Serial eval board from SiLabs. For $49 US I have never had another problem with the USB to serial adapter on many different computers. I strongly suggest that you invest in a high quality USB to Serial adapter and not waste your valuable time trying to schew your data rates for reliable operation. I typically run their EC2 box at 115K baud with the adapter. This does nothing to answer your primary question other than to say don't waste your time. Bradford