Lpc2000

Maybe this helps:

In my USB code, I have P0.31 configured as CONNECT and P0.23
as VBUS sense. With that configuration I found that P0.31 can
only become active when P0.23 sees a high level.

Regards,
Bertrik

varuzhandanielyan wrote:
> Nothing helps.
> 
> I am going step-by-step using ULINK and watching the P0.31
> state by scope.
> If I configure P0.31 as output, I can easily set it to 0 or
> 1, but when I configure it for CONNECT inside the USB_Init() :
> PINSEL1 |=  0x80004000;
> and try to set the SoftConnect_N active, P0.31 remains in
> high (inactive) state.
> I tried both calling the USB_Connect(TRUE) and immediate
> by commands
> CMD_CODE = 0x00FE0500;
> CMD_CODE = 0x00010100;
> placing them in different places, particularly after
> USB_Reset() as recommended - no effect.
> 
> Please, help me, what is wrong?
> 
> Great thanks in advance,
> Varuzhan
> 
> 
> 
> --- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@...> wrote:
>>
>> Varuzhan,
>>
>>     On Keil's website, there is an app-note how to use the soft
>> connect: http://www.keil.com/support/docs/3141.htm
>>
>>     It's a regret that, unlike Olimex and IAR board, Keil's board
>> doesn't have the soft connect feature on the board. So, you will
>> have to rewire the board as seen on the Olimex schematics or Keil's
>> app-note.
>>     I have tested with both external power supply and USB power
>> with soft connect logic. It works just fine. What Joel said is true:
>> set PINSEL1 to use "soft connect", then send SET_DEVICE_STATUS
>> command to protocol engine by calling "USB_Connect(TRUE)" as seen in
>> Keil's example. I think you may want to check your H/W logic again.
>>
>>     In Keil's example, you may want to add "USB_Connect(TRUE)"
>> in the ISR handler, right after USB_Reset(), to deal with bus reset
>> interrupt, just to be safe.
>>
>> Regards,
>>
>> Tom
>>
>>
>> --- In lpc2000@yahoogroups.com, "varuzhandanielyan" <dan@> wrote:
>> >
>> > Hi, Joel
>> >
>> > I changed P0.31 to be configured as CONNECT:
>> >   PINSEL1 |= 0x80004000; // 0x40004000;                   /* Select
>> > USB Link, VBUS */
>> >
>> > The CON bit (page 225) is already set by the call in the Keil
>> example:
>> >   USB_Connect(TRUE);                        /* USB Connect */
>> >
>> > But it still does not work.
>> >
>> > By the way, my previous project with LPC2138 and FTDIChip FT2232C
>> > started to work without any problem.  It is pity, that the LPC2148
>> USB
>> > usage requires such effort.
>> >
>> > Varuzhan
>> >
>> >
>> > --- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@> wrote:
>> > >
>> > > Hi Varuzhan,
>> > >
>> > > > > When PINSEL0 P0.31 is configured for CONNECT, refer to page
>> 225 of
>> > > > the User
>> > > > > Manual for control of this pin.
>> > >
>> > > Did you configure PINSEL0 P0.31 for CONNECT?
>> > > Are you sending command as per page 225 to connect/disconnect?
>> > >
>> > >
>> > > Joel
>> > >
>> >
>>