I have been having trouble with serial to usb adaptors. Sometimes characters get lost or corrupted in both transmit and receive. It seems I need a different serial-->USB adaptor/driver combintion, but what?
Here is the layout:
Atmega32 running at 8mhz, uart @ 9600 baud.
Serial adaptors tried: Keyspan, FTDI, Prolific.
Win7 64 drivers from the coresponding manufacturers website.
Oparating system: Windows 7 64bit home on a 6 month old cheap HP laptop.
Terminal program: MTTTY or Terraterm.
RS232 level converter from the AVR uart : ST232
Everything works fine on a real serial port on a desktop, and all the adaptors work fine on Linux, right out of the box. Even atmel's Avrprog under wine works fine.
The FTDI has troube on a winXP laptop, but the Keyspan and the Prolific work fine.
I've tried shorter usb cables, and made sure they where the shielded type.
Any suggestions appreciated.