How to extend the number of serial ports by using USB port?

[john2020]

Extending serial ports

dear all,

i wanted to increase the number of serial ports, by using USB port in
my board, how can we do that any 1 has idea?

well i will use a usb to serial convertyer device, but for that i
will require driver right?so where can i get that?

well in desktop windows that converter is automatically detected, OS
assigns a COM port Number also automatically, but to activate it in
win CE what will i have to do? or which COM port it will take it as?

any suggestions will be greatly appreciated.

thanx
john

 

[artem]

Extending serial ports

Following possibilites do exist :

- ask USB chip manufactorer for driver or source code
- search microsoft site for drivers (suppose you have windows CE)
- search internet for source code of drivers for linux for chips you are going to use in USB to serial hack them and adapt to windows CE
- use multiple UART micro with usb device implemented and write driver for that device
- use multiple UART micro (such as m32C mitsubishi)
and connect it to your device by com port and use special protocol to access individual ports on that micro
- use few ( let say atmel) micro where one is master and connected to pc via usart and provides connectivitiy to other slave mciros (each having separate uart) via SPI . Again special handling is required .
- any other variants not mentioned