firmware for my Touchscreen E-Paper Input Module for Framework Laptop 16
eepy-sys: add eep(); eepy-launcher: switch to eep()
+17
-6
+3
-6
eepy-launcher/src/main.rs
+3
-6
eepy-launcher/src/main.rs
···
6
6
7
7
extern crate panic_halt;
8
8
9
-
use core::arch::asm;
10
9
use core::mem::offset_of;
11
10
use core::sync::atomic::Ordering;
12
11
use usb_device::bus::UsbBusAllocator;
13
12
use eepy_gui::draw_target::EpdDrawTarget;
14
13
use eepy_gui::element::Gui;
15
-
use eepy_sys::input::{has_event, next_event, set_touch_enabled};
14
+
use eepy_sys::input::{eep, next_event, set_touch_enabled};
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use eepy_sys::misc::get_serial;
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use eepy_sys::usb::{self, UsbBus};
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17
use usb_device::prelude::*;
···
101
100
} else if NEEDS_REFRESH.swap(false, Ordering::Relaxed) {
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gui.draw_init(&mut draw_target);
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draw_target.refresh(false);
104
-
} else if !has_event() {
105
-
// has_event() is a syscall. The SVCall exception is a WFE wakeup event, so we need two
106
-
// WFEs so we don't immediately wake up.
107
-
unsafe { asm!("wfe", "wfe") };
103
+
} else {
104
+
eep();
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105
}
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106
}
110
107
}
+14
eepy-sys/src/input.rs
+14
eepy-sys/src/input.rs
···
1
+
use core::arch::asm;
1
2
use core::mem::MaybeUninit;
2
3
use crate::{syscall, SafeOption};
3
4
use crate::input_common::Event;
···
47
48
}
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50
has_event != 0
51
+
}
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+
53
+
/// If there are no events remaining in the event queue, allow the processor to enter a sleep state
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+
/// until there is a new event ready.
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+
#[inline(always)]
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+
pub fn eep() {
57
+
if !has_event() {
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+
// SAFETY: "wfe" only (maybe) puts the processor to sleep temporarily and doesn't access any
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+
// memory so this specific instruction is safe
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+
// has_event() is a syscall. The SVCall exception is a WFE wakeup event, so we need two
61
+
// WFEs so we don't immediately wake up.
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+
unsafe { asm!("wfe", "wfe"); }
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+
}
50
64
}