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 Post subject: Intel Atom Elkhart Lake GPIO control
PostPosted: Tue Apr 02, 2024 5:21 pm 
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hello Octocontrabass

Which is the register to use to change the state of GPIO, 1 to 0 or 0 to 1 so on during run time, is it DW0?


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Ravi


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 Post subject: Re: Intel Atom Elkhart Lake GPIO control
PostPosted: Tue Apr 02, 2024 6:03 pm 
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When the GPIO is configured as an output, bit 0 of DW0 is the output value.


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 Post subject: Re: Intel Atom Elkhart Lake GPIO control
PostPosted: Wed Apr 03, 2024 8:13 am 
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Yeah its configured as output,,, but when i try to change DW0 bit 0, to Change the output state, nothing happens, it appeared as if the memory is locked

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Ravi


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 Post subject: Re: Intel Atom Elkhart Lake GPIO control
PostPosted: Wed Apr 03, 2024 8:00 pm 
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ravi wrote:
it appeared as if the memory is locked

MMIO is not memory.

Firmware might have locked the configuration registers. You can read the lock registers and the ownership registers to check.

Your board's firmware might describe the GPIOs using ACPI AML.


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 Post subject: Re: Intel Atom Elkhart Lake GPIO control
PostPosted: Thu Apr 04, 2024 9:25 am 
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Thanks, Solved

Configfile in bootloader was getting corrupted, my pad configuration where not updated correctly,, i think the editor(comes with SBL tool) is the issue


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Ravi


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