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Don't overflow on subtract
Replace giant match with for loop
dedupe register write
This commit is contained in:
Caleb Jamison 2024-09-16 12:41:12 -04:00
parent 55c3da5a4f
commit 48fd0550d1
1 changed files with 43 additions and 87 deletions
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130
embassy-rp/src/pio/mod.rs
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@ -767,95 +767,51 @@ impl<'d, PIO: Instance + 'd, const SM: usize> StateMachine<'d, PIO, SM> {
#[cfg(feature = "_rp235x")] #[cfg(feature = "_rp235x")]
{ {
let shift_gpio_base = { let mut low_ok = true;
match ( let mut high_ok = true;
if config.in_count > 0 { for pin in [
Some(config.pins.in_base) config.pins.in_base,
} else { config.pins.in_base + config.in_count,
None config.pins.sideset_base,
}, config.pins.sideset_base + config.pins.sideset_count,
if config.pins.sideset_count > 0 { config.pins.set_base,
Some(config.pins.sideset_base) config.pins.set_base + config.pins.set_count,
} else { config.pins.out_base,
None config.pins.out_base + config.pins.out_count,
}, ]
if config.pins.set_count > 0 { .iter()
Some(config.pins.set_base) .flatten()
} else { {
None low_ok &= pin < 32;
}, high_ok &= pin >= 16;
if config.pins.out_count > 0 {
Some(config.pins.out_base)
} else {
None
},
) {
(None, None, None, None) => false,
(Some(..32), None, None, None) => false,
(None, Some(..32), None, None) => false,
(None, None, Some(..32), None) => false,
(None, None, None, Some(..32)) => false,
(Some(..32), Some(..32), None, None) => false,
(None, Some(..32), Some(..32), None) => false,
(None, None, Some(..32), Some(..32)) => false,
(Some(..32), None, None, Some(..32)) => false,
(None, Some(..32), Some(..32), Some(..32)) => false,
(Some(..32), None, Some(..32), Some(..32)) => false,
(Some(..32), Some(..32), None, Some(..32)) => false,
(Some(..32), Some(..32), Some(..32), None) => false,
(Some(..32), Some(..32), Some(..32), Some(..32)) => false,
(Some(16..), None, None, None) => true,
(None, Some(16..), None, None) => true,
(None, None, Some(16..), None) => true,
(None, None, None, Some(16..)) => true,
(Some(16..), Some(16..), None, None) => true,
(None, Some(16..), Some(16..), None) => true,
(None, None, Some(16..), Some(16..)) => true,
(Some(16..), None, None, Some(16..)) => true,
(None, Some(16..), Some(16..), Some(16..)) => true,
(Some(16..), None, Some(16..), Some(16..)) => true,
(Some(16..), Some(16..), None, Some(16..)) => true,
(Some(16..), Some(16..), Some(16..), None) => true,
(Some(16..), Some(16..), Some(16..), Some(16..)) => true,
(i, side, set, out) => panic!(
"All pins must either be <=31 or >=16, in:{:?}, side:{:?}, set:{:?}, out:{:?}",
i, side, set, out
),
}
};
if shift_gpio_base {
sm.pinctrl().write(|w| {
w.set_sideset_count(config.pins.sideset_count);
w.set_set_count(config.pins.set_count);
w.set_out_count(config.pins.out_count);
w.set_in_base(config.pins.in_base - 16);
w.set_sideset_base(config.pins.sideset_base - 16);
w.set_set_base(config.pins.set_base - 16);
w.set_out_base(config.pins.out_base - 16);
});
} else {
sm.pinctrl().write(|w| {
w.set_sideset_count(config.pins.sideset_count);
w.set_set_count(config.pins.set_count);
w.set_out_count(config.pins.out_count);
w.set_in_base(config.pins.in_base);
w.set_sideset_base(config.pins.sideset_base);
w.set_set_base(config.pins.set_base);
w.set_out_base(config.pins.out_base);
});
} }
PIO::PIO.gpiobase().write(|w| w.set_gpiobase(shift_gpio_base)); if !low_ok && !high_ok {
panic!(
"All pins must either be <32 or >=16, in:{:?}-{:?}, side:{:?}-{:?}, set:{:?}-{:?}, out:{:?}-{:?}",
config.pins.in_base,
config.pins.in_base + config.in_count,
config.pins.sideset_base,
config.pins.sideset_base + config.pins.sideset_count,
config.pins.set_base,
config.pins.set_base + config.pins.set_count,
config.pins.out_base,
config.pins.out_base + config.pins.out_count,
)
}
let shift = if low_ok { 0 } else { 16 };
sm.pinctrl().write(|w| {
w.set_sideset_count(config.pins.sideset_count);
w.set_set_count(config.pins.set_count);
w.set_out_count(config.pins.out_count);
w.set_in_base(config.pins.in_base.checked_sub(shift).unwrap_or_default());
w.set_sideset_base(config.pins.sideset_base.checked_sub(shift).unwrap_or_default());
w.set_set_base(config.pins.set_base.checked_sub(shift).unwrap_or_default());
w.set_out_base(config.pins.out_base.checked_sub(shift).unwrap_or_default());
});
PIO::PIO.gpiobase().write(|w| w.set_gpiobase(shift == 16));
} }
if let Some(origin) = config.origin { if let Some(origin) = config.origin {