Re: uClinux Source Code Patch (Finally!) for Dual PC Modem

I'm pretty sure there are spare IO ports that aren't used.  The problem is that
the chip is a fine pitch ball grid array, or whatever Conexant calls their
mounting tech.  Unless the pin is brought out to somewhere else on the PCB, you
don't have access to it unless you pull the CPU off the board.  

Patrick M

--- Jarvist Frost <[email protected]> wrote:
> On Mon, 19 Apr 2004 16:21:46 -0700
> "Bruce D. Lightner" <lightner-2huV/[email protected]> wrote:
> >    linux/arch/armnommu/mach-cx821xx/gpioisr.c
> >    linux/arch/armnommu/mach-cx861xx/gpio.c
> 
> These two files look very interesting - what I assume stands for
> GeneralPurposeInput/Output; does anybody know what part of the device
> physically this corresponds to?
> 
> Quoth the source:
> /**********************************************************************
> ******
>  *
>  *  Name:           void SetGPIOPadElectrical( UINT32 uGPIOPin, UINT32
> uSchmidt, UINT32 uPUPD, UINT32 uDr
> iveStrength )
>  *
>  *  Description:    Sets the GPIO Pad's electical characteristics
>  *
>  *  Inputs:         UINT32 uGPIOPin       = which GPIO
>  *                  UINT32 uSchmidt       = GPIO_NONSCHMIDT (0) or
> GPIO_SCHMIDT (1)
>  *                  UINT32 uPUPD          = GPIO_NOPULL_UP_DOWN, no
> pullup or pulldown
>  *                                        = GPIO_10uAPULLDOWN, 10uA 
> pulldown
>  *                                        = GPIO_100uAPULLUP, 100uA
> pullup
>  *                                        = GPIO_10uAPULLUP, 10uA 
> pullup
>  *                  UINT32 uDriveStrength = GPIO_0_5mA_DRVSTRENTH, 0.5mA
>  *                                          GPIO_1_5mA_DRVSTRENTH, 1.5mA
>  *                                          GPIO_2_3mA_DRVSTRENTH, 2.3mA
>  *                                          GPIO_3_5mA_DRVSTRENTH, 3.5mA
>  *                                          GPIO_5_0mA_DRVSTRENTH, 5.0mA
>  *                                          GPIO_6_0mA_DRVSTRENTH, 6.0mA
>  *                                          GPIO_7_0mA_DRVSTRENTH, 7.0mA
>  *                                          GPIO_8_0mA_DRVSTRENTH, 8.0mA
>  *
>  *  Outputs:        none
>  *
> 
> ***********************************************************************
> ****/
> 
> Which with the interrupt handling facilities, would seem ample for any
> datalogging / peripheal control functions that people could dream up...
> 
> So, are there a few spare bits of IO? Or are they all used for
> interacting with the ROM/flash?
> 
> Jarvist
> 
> -- 
> Ad astra per aspera [Through Our Endeavors, The Stars]
> __
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