[ts-7000] Re: Unable to set anything but B[1] on TS-7800 PC-104

["craignied" <>]

--- In  "Harold" <> wrote:
>
> You may need to write to the PC/104 MUX registers at 0xE8000030 to 0xE800003C 
> to set the pins to function as GPIO instead of ISA bus.

Whoa, you're absolutely right.

This is in the TS-7800 manual:

The PC-104 connector can be multiplexed between different functionalities 
including ISA bus and GPIO. The power-up default is GPIO mode, with all I/Os in 
a neutral state. To enable the PC-104 bus (ISA) signals, it is necessary to 
write the following values to the registers specified:
0x55555555 to address 0xE8000030
0x55555555 to address 0xE8000034
0x55555 to address 0xE8000038
0x55555 to address 0xE800003C

So I stupidly assumed that the power-up default is GPIO mode :)

This did the trick:

        BUS = ( unsigned int * ) ( base + ( 0x30 / 0x04 ) );
        *BUS = 0x0;
        BUS = ( unsigned int * ) ( base + ( 0x34 / 0x04 ) );
        *BUS = 0x0;
        BUS = ( unsigned int * ) ( base + ( 0x38 / 0x04 ) );
        *BUS = 0x0;
        BUS = ( unsigned int * ) ( base + ( 0x3C / 0x04 ) );
        *BUS = 0x0;

before any read/writes

Thanks *super*
Craig



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