From 34c86289a25eaea5e511e557f2a247d34ca5eae8 Mon Sep 17 00:00:00 2001
From: Scott Mabin <scott@mabez.dev>
Date: Fri, 22 Jul 2022 11:03:11 +0100
Subject: [PATCH] Support passing the trap frame into interrupt handlers

---
 esp32-hal/examples/gpio_interrupt.rs |  6 +-
 esp32-hal/test.rs                    | 96 ++++++++++++++++++++++++++++
 2 files changed, 101 insertions(+), 1 deletion(-)
 create mode 100644 esp32-hal/test.rs

diff --git a/esp32-hal/examples/gpio_interrupt.rs b/esp32-hal/examples/gpio_interrupt.rs
index 0954cc8ec2b..15f209b5f7f 100644
--- a/esp32-hal/examples/gpio_interrupt.rs
+++ b/esp32-hal/examples/gpio_interrupt.rs
@@ -69,12 +69,16 @@ fn main() -> ! {
 
 #[ram]
 #[interrupt]
-fn GPIO() {
+fn GPIO(frame: &mut xtensa_lx_rt::exception::Context) {
     unsafe {
         esp_println::println!(
             "GPIO Interrupt with priority {}",
             xtensa_lx::interrupt::get_level()
         );
+        esp_println::println!(
+            "{:?}",
+            frame
+        );
 
         (&BUTTON).lock(|data| {
             let mut button = data.borrow_mut();
diff --git a/esp32-hal/test.rs b/esp32-hal/test.rs
new file mode 100644
index 00000000000..efe312cfd8b
--- /dev/null
+++ b/esp32-hal/test.rs
@@ -0,0 +1,96 @@
+#![feature(prelude_import)]
+#![no_std]
+#![no_main]
+#[prelude_import]
+use core::prelude::rust_2021::*;
+#[macro_use]
+extern crate core;
+#[macro_use]
+extern crate compiler_builtins;
+use core::cell::RefCell;
+use esp32_hal::{
+    clock::ClockControl,
+    gpio::{Gpio0, IO},
+    gpio_types::{Event, Input, Pin, PullDown},
+    interrupt,
+    macros::ram,
+    pac::{self, Peripherals},
+    prelude::*,
+    timer::TimerGroup,
+    Cpu, Delay, RtcCntl,
+};
+use panic_halt as _;
+use xtensa_lx::mutex::{Mutex, SpinLockMutex};
+use xtensa_lx_rt::entry;
+static mut BUTTON: SpinLockMutex<RefCell<Option<Gpio0<Input<PullDown>>>>> =
+    SpinLockMutex::new(RefCell::new(None));
+#[doc(hidden)]
+#[export_name = "main"]
+pub unsafe extern "C" fn __xtensa_lx_rt_main_trampoline() {
+    __xtensa_lx_rt_main()
+}
+#[inline(always)]
+fn __xtensa_lx_rt_main() -> ! {
+    let peripherals = Peripherals::take().unwrap();
+    let system = peripherals.DPORT.split();
+    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
+    let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
+    let mut wdt = timer_group0.wdt;
+    let mut rtc_cntl = RtcCntl::new(peripherals.RTC_CNTL);
+    wdt.disable();
+    rtc_cntl.set_wdt_global_enable(false);
+    let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
+    let mut led = io.pins.gpio15.into_push_pull_output();
+    let mut button = io.pins.gpio0.into_pull_down_input();
+    button.listen(Event::FallingEdge);
+    unsafe {
+        (&BUTTON).lock(|data| (*data).replace(Some(button)));
+    }
+    interrupt::vectored::enable_with_priority(
+        Cpu::ProCpu,
+        pac::Interrupt::GPIO,
+        interrupt::vectored::Priority::Priority2,
+    )
+    .unwrap();
+    led.set_high().unwrap();
+    let mut delay = Delay::new(&clocks);
+    loop {
+        led.toggle().unwrap();
+        delay.delay_ms(500u32);
+    }
+}
+#[link_section = ".rwtext"]
+#[inline(never)]
+#[doc(hidden)]
+#[export_name = "GPIO"]
+pub unsafe extern "C" fn __esp_hal_internal_GPIO_trampoline(
+    context: &mut xtensa_lx_rt::exception::Context,
+) {
+    __esp_hal_internal_GPIO()
+}
+#[inline(always)]
+#[link_section = ".rwtext"]
+#[inline(never)]
+fn __esp_hal_internal_GPIO() {
+    unsafe {
+        {
+            use core::fmt::Write;
+            ::esp_println::Printer
+                .write_fmt(::core::fmt::Arguments::new_v1(
+                    &["GPIO Interrupt with priority ", "\n"],
+                    &[::core::fmt::ArgumentV1::new_display(
+                        &xtensa_lx::interrupt::get_level(),
+                    )],
+                ))
+                .ok();
+        };
+        (&BUTTON).lock(|data| {
+            let mut button = data.borrow_mut();
+            let button = button.as_mut().unwrap();
+            button.clear_interrupt();
+        });
+    }
+    {
+        crate::pac::Interrupt::GPIO;
+    }
+}