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Re: More flexibility with FTDI interfaces Thomas Jarosch Mon Dec 26 23:01:07 2011

Hi Evan,

On Tuesday, 6. December 2011 22:59:24 [EMAIL PROTECTED] wrote:
> Perhaps something like:
> 
> enum ftdi_interface
> {
>      INTERFACE_ANY              = 0,
> 
>      INTERFACE_A                = 0x10,
>      INTERFACE_B                = 0x20,
>      INTERFACE_C                = 0x40,
>      INTERFACE_D                = 0x80,
>      INTERFACE_A_OR_B           = INTERFACE_A | INTERFACE_B,
>      INTERFACE_A_OR_C           = INTERFACE_A | INTERFACE_C,
>      INTERFACE_A_OR_D           = INTERFACE_A | INTERFACE_D,
>      INTERFACE_B_OR_C           = INTERFACE_B | INTERFACE_C,
>      INTERFACE_B_OR_D           = INTERFACE_B | INTERFACE_D,
>      INTERFACE_C_OR_D           = INTERFACE_C | INTERFACE_D,
>      INTERFACE_A_OR_B_OR_C      = INTERFACE_A | INTERFACE_B |
> INTERFACE_C,
>      INTERFACE_A_OR_B_OR_D      = INTERFACE_A | INTERFACE_B |
> INTERFACE_D,
>      INTERFACE_A_OR_C_OR_D      = INTERFACE_A | INTERFACE_C |
> INTERFACE_D,
>      INTERFACE_B_OR_C_OR_D      = INTERFACE_B | INTERFACE_C |
> INTERFACE_D,
>      INTERFACE_A_OR_B_OR_C_OR_D = INTERFACE_A | INTERFACE_B |
> INTERFACE_C | INTERFACE_D,
> 
> 
> 
> 
>      DEPRECATED_INTERFACE_A     = 1,
>      DEPRECATED_INTERFACE_B     = 2,
>      DEPRECATED_INTERFACE_C     = 3,
>      DEPRECATED_INTERFACE_D     = 4
> };

Ok. What would happen to INTERFACE_ANY,
would it still default to INTERFACE_A?

I'm not 100% sure the INTERFACE_A_OR_C stuff belongs in libftdi
though I'm not fixed on this.

Does anyone know how the official d2xx library handles this?

> The code could be changed slightly to work with either
> 'DEPRECATED_INTERFACE_x' or 'INTERFACE_x', so that there would be no
> effect on existing code.
> 
> Over time more apps will be rebuilt against the new header, and
> eventually the deprecated interfaces could be removed.

That might take ages ;) OTOH libftdi 1.x is the right time
for (small) API breakage.

Cheers,
Thomas

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