Hello,
> Eddie Dawydiuk wrote:
>> These pins can be used as GPIO pins or used for DMA. The bootrom for the
>> TS-7300 uses DMA, so by default these pins are configured for DMA. You
>> can refer to the keypad example code for an example of how to reconfigure
>> these pins as GPIO pins.
>>
>> http://www.embeddedarm.com/downloads/samplecode/keypad.c
>> <http://www.embeddedarm.com/downloads/samplecode/keypad.c>
>>
>> e.g.
>> //Disable DMA on GPIO
>> *(syscon + SFTWR_LCK) = 0xAA;
>> *(syscon + DEVICE_CFG) = 0x08140d00;
>
> Interesting. Does a similar situation exist on the TS-7250? I need to use all
> of the pins on DIO1 as GPIO pins. ie. odd numbered pins on the DIO1 header to
> be outputs except pin 15 which will be an input.
No, this is not an issue on the TS-7250. The TS-7300 uses DMA for the SD
card to speed up the boot process...
--
Best Regards,
______________________________________________________________
Eddie Dawydiuk, Technologic Systems | voice: (480) 837-5200
16610 East Laser Drive Suite 10 | fax: (480) 837-5300
Fountain Hills, AZ 85268 | web: www.embeddedARM.com
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