Enable GPIO Pin Interrupts #1922
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labbott
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Nov 19, 2024
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Add interrupt-related API calls to the LPC55 `gpio_driver`.
A task on an LPC55 can now configue and use GPIO interrupts.
app.toml example shows Pin Interrupt configuration:
[tasks.foo]
...
interrupts = { "pint.irq0" = "button-irq" }
...
task-slots = ["gpio_driver", ...]
[tasks.foo.config]
pins = [
{ name="BUTTON', pin={ port=1, pin=9}, alt=0, pint=0, direction="input", opendrain="normal" }
]
…API.
The functions:
fn {clear,detected,disable,enable}_{rising,falling,status}(PintSlot)
and
fn read_pint_status(...)
become
fn pint_op(PintSlot, PintOp, PintCondition)
This leaves a couple permutations not covered (enable/disable
interrupt at the NVIC level).
Those can are left as no-ops for the time being.
Future: The unimplemented combinations could return an error/fault
if called.
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…EADME.md Feedback response: Fix idl/lpc55-pins.idol to use Option<PintSlot>. Feedback response: Collapse the many PINT calls in lpc55-pins.idol to one `pint_op`
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cbiffle
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Feb 3, 2025
| @@ -77,3 +77,12 @@ size = 0x1000 | |||
| [bootrom] | |||
| address = 0x03000000 | |||
| size = 0x10000 | |||
|
|
|||
| [pint] | |||
There was a problem hiding this comment.
FYI, to keep region count down (which is less critical on v8M but still), IOCON, PINT, and two currently-unused-but-relevant-looking blocks (GINT0/1) are adjacent. So you could merge them into one block at 0x4000_1000 with length 0x4000.
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Add interrupt-related API calls to the LPC55
gpio_driver.Also:
Fix app/gimletlet/app-mgmt.toml stack size which was found while building all targets.
A task on an LPC55 can now configue and use GPIO interrupts.
app.toml example shows Pin Interrupt configuration:
[tasks.foo]
...
interrupts = { "pint.irq0" = "button-irq" }
...
task-slots = ["gpio_driver", ...]
[tasks.foo.config]
pins = [
{ name="BUTTON', pin={ port=1, pin=9}, alt=0, pint=0, direction="input", opendrain="normal" }
]