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[GPIO] raise bus exception if writing to INPUT registers #255

Merged
merged 4 commits into from
Jan 14, 2022
Merged

[GPIO] raise bus exception if writing to INPUT registers #255

merged 4 commits into from
Jan 14, 2022

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This PR modifies the GPIO module to raise a store bus access error exception if software tries to write to the read-only INPUT registers (NEORV32_GPIO.INPUT_LO and NEORV32_GPIO.INPUT_HI). The BUSKEEPER will indidcate a device error ("DEVICE_ERR") in this case.

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[sw/lib] minor comment edits
b08a158
@stnolting
[rtl/core] GPIO.input is read-only
8303255 
Any write access to the INPUT register will raise a bus exception.
@stnolting stnolting added enhancement New feature or request HW hardware-related labels Jan 14, 2022
@stnolting stnolting self-assigned this Jan 14, 2022
@stnolting stnolting marked this pull request as ready for review January 14, 2022 05:13
@stnolting stnolting merged commit b65693d into master Jan 14, 2022
@stnolting stnolting deleted the gpio_input_ro branch January 14, 2022 18:55
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