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USB CDC Win7 64 "This device cannot start. (Code 10)

 
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Bollo



Joined: 01 Dec 2010
Posts: 25

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USB CDC Win7 64 "This device cannot start. (Code 10)
PostPosted: Tue Dec 14, 2010 12:48 pm     Reply with quote
Hello, I'm using a PIC18F27J53 with CCS 4.114. I'm attempting to use the CCS CDC driver but I keep getting the message in the subject when using Win7 64. On an old XP computer the driver installs and functions correctly. The following is the code I'm using to test the connection.

Code:
void main(){
   initialise();
  BYTE i;
   usb_init_cs();
   
   do
   {
      usb_task();
      
       if (usb_enumerated())
       {
      if (msg==0){
         printf(lcd_putc,"\fEnumerated!");
         msg=1;
      }
         if (usb_cdc_kbhit())
         {
            i = toupper(usb_cdc_getc());
           
            if (i == 'R')
            {
               printf(usb_cdc_putc, "Sending a R Back");
            }
           
            if (i == 'W')
            {
               printf(usb_cdc_putc, "Sending a W Back");
            }
         }
      }
   else {
      if (msg==1){
         printf(lcd_putc,"\fWaiting...");
         msg=0;
        }
   } 
   } while (TRUE);
}


There are lots of posts in the forum saying different things regarding the compatibility of the CDC driver with Win7 64. I would like to know if the driver bundled with CCSC 4.114 should work on Win7 64 and if so does anyone know why I get "This device cannot start. (Code 10)" in device manager for "USB to UART"
Bollo



Joined: 01 Dec 2010
Posts: 25

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PostPosted: Wed Dec 15, 2010 10:54 am     Reply with quote
I have just solved it it seems. XP doesn't seem to care if the
Code:
#define  USB_CONFIG_BUS_POWER
section in usb_desc_cdc.h is set to a value even if the 5V line of the usb is not connected. Win7 (64 or 32) does seem to get upset. Setting that USB_CONFIG_BUS_POWER to 0 seems to have allowed the device to start so no more code 10 errors!
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