I use STM32 VirtualCom USB library it have two function CDC_Receive_FS(); and CDC_Transmit_FS();. These functions send and receive data arrays, how can I send and receive one byte at a time?

[shingadaddy]

I have time for a quick answer. Most of the examples I am familiar with allow you to specify "LENGTH".

If set to "1" I would expect that to work. Unless you are

1. using some application that makes it necessary to PILE UP a minimum amount to send.
2. Expecting to see exactly "1" byte transmitted on the USB bus. Which of course you WON'T see.

A LOT to read in between the lines with your question here. But hope maybe that helps.