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???
05/10/13 15:01
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 		 #189736 - FTDI Combined Driver
Responding to: ???'s previous message
Joseph Hebert said:
In point of fact, I use Silabs USB-UART chips and they work quite well, even for programming my processors. The trick is in the driver. In order to program my processors I need the virtual COM port driver loaded. Then I just select the COM port number as normal. But when the software on my computer needs to interact over the bridge chip I need the API driver loaded (USBExpress for Silabs). And I select the driver I want loaded by setting the PID accordingly. If the PID is EA60h the OS loads the API driver. If the PID is set to EA61h the OS loads the virtual COM port driver.

A nice feature of the FTDI chips is their Combined Driver which allows to use either the virtual comport or the DLL interface without modifying the PID.

List of 31 messages in thread
TopicAuthorDate
At89s52 programming and interfacing            01/01/70 00:00      
   What development board?            01/01/70 00:00      
      link            01/01/70 00:00      
         don't know any, but ....            01/01/70 00:00      
   It is a well known fact ...            01/01/70 00:00      
      Drivers            01/01/70 00:00      
      that's one of the penatlies for using USB.            01/01/70 00:00      
         Caught up in......            01/01/70 00:00      
      CP2102            01/01/70 00:00      
         FTDI chip clock            01/01/70 00:00      
            FTDI            01/01/70 00:00      
               multi-port parts            01/01/70 00:00      
         FTDI Combined Driver            01/01/70 00:00      
            FTDI            01/01/70 00:00      
   USB advantages 100 penalties 2 ...            01/01/70 00:00      
      Do those work with the various ATMEL "programmers"?            01/01/70 00:00      
         Not Awways the USB Converter's Fault            01/01/70 00:00      
            Absolutely!!            01/01/70 00:00      
            I wouldn't argue with that for a minute            01/01/70 00:00      
               Board version             01/01/70 00:00      
                  The Board In Question            01/01/70 00:00      
         RE: "an old PC that has a real serial port"            01/01/70 00:00      
            Well .... actually ... no ...             01/01/70 00:00      
               Old apps on Windows 7 (or 8)            01/01/70 00:00      
                  don't know what "old apps" yo refer to, but ...            01/01/70 00:00      
                     That's what I've said about Vista and Win7            01/01/70 00:00      
                     OrCAD 9            01/01/70 00:00      
                        It's a windows version, and much less capable than v 1.0            01/01/70 00:00      
      RE: "decent USB equipment works very well"            01/01/70 00:00      
         this goes to the heart of the issue ...             01/01/70 00:00      
   Terminal emulator            01/01/70 00:00      

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