-
Notifications
You must be signed in to change notification settings - Fork 165
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
stm32h7-nucleo: add button demo task to nucleos (#1693)
This commit adds a demo task to the STM32H7 Nucleo boards that provides an example of how to receive EXTI GPIO notifications in a user task, replacing the `ping` and `pong` tasks. It toggles an LED when the Nucleo board's user button is pressed.
- Loading branch information
Showing
7 changed files
with
202 additions
and
34 deletions.
There are no files selected for viewing
Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| [package] | ||
| name = "task-nucleo-user-button" | ||
| version = "0.1.0" | ||
| edition = "2021" | ||
|
|
||
| # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html | ||
|
|
||
| [dependencies] | ||
| drv-user-leds-api = { path = "../../drv/user-leds-api" } | ||
| drv-stm32xx-sys-api = { path = "../../drv/stm32xx-sys-api", features = ["family-stm32h7"] } | ||
|
|
||
| counters = { path = "../../lib/counters" } | ||
| ringbuf = { path = "../../lib/ringbuf" } | ||
| userlib = { path = "../../sys/userlib" } | ||
| task-config = { path = "../../lib/task-config" } | ||
|
|
||
| [build-dependencies] | ||
| build-util = { path = "../../build/util" } | ||
|
|
||
| [[bin]] | ||
| name = "task-nucleo-user-button" | ||
| test = false | ||
| doctest = false | ||
| bench = false |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at https://mozilla.org/MPL/2.0/. | ||
|
|
||
| fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> { | ||
| build_util::expose_target_board(); | ||
| build_util::build_notifications()?; | ||
| Ok(()) | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at https://mozilla.org/MPL/2.0/. | ||
|
|
||
| //! A demo task showing the use of EXTI (GPIO interrupts) on the | ||
| //! STM32H7-NUCLEO-H753ZI2 board. | ||
| //! | ||
| //! This task listens for interrupts on the user button (PC13) and toggles a LED | ||
| //! when the button is pressed, using the `user-leds` IPC interface. | ||
|
|
||
| #![no_std] | ||
| #![no_main] | ||
|
|
||
| use drv_stm32xx_sys_api::{PinSet, Port, Pull}; | ||
| use ringbuf::ringbuf_entry; | ||
| use userlib::*; | ||
|
|
||
| #[cfg(not(any( | ||
| target_board = "nucleo-h753zi", | ||
| target_board = "nucleo-h743zi2" | ||
| )))] | ||
| compile_error!( | ||
| "the `nucleo-user-button` task is only supported on the Nucleo H753ZI and H743ZI2 boards" | ||
| ); | ||
|
|
||
| task_slot!(USER_LEDS, user_leds); | ||
| task_slot!(SYS, sys); | ||
|
|
||
| task_config::optional_task_config! { | ||
| /// The index of the user LED to toggle | ||
| led: usize, | ||
| /// Whether to enable rising-edge interrupts | ||
| rising: bool, | ||
| /// Whether to enable falling-edge interrupts | ||
| falling: bool, | ||
| } | ||
|
|
||
| // In real life, we might not actually want to trace all of these events, but | ||
| // for demo purposes, it's nice to be able to watch everything that happens in | ||
| // Humility. | ||
| #[derive(Copy, Clone, Eq, PartialEq, counters::Count)] | ||
| enum Trace { | ||
| #[count(skip)] | ||
| None, | ||
|
|
||
| /// We called the `Sys.gpio_irq_configure` IPC with these arguments. | ||
| GpioIrqConfigure { | ||
| mask: u32, | ||
| rising: bool, | ||
| falling: bool, | ||
| }, | ||
|
|
||
| /// We called the `Sys.gpio_irq_control` IPC with these arguments. | ||
| GpioIrqControl { enable_mask: u32, disable_mask: u32 }, | ||
|
|
||
| /// We received a notification with these bits set. | ||
| Notification(u32), | ||
|
|
||
| /// We called the `UserLeds.led_toggle` IPC. | ||
| LedToggle { led: usize }, | ||
| } | ||
|
|
||
| ringbuf::counted_ringbuf!(Trace, 16, Trace::None); | ||
|
|
||
| #[export_name = "main"] | ||
| pub fn main() -> ! { | ||
| let user_leds = drv_user_leds_api::UserLeds::from(USER_LEDS.get_task_id()); | ||
| let sys = drv_stm32xx_sys_api::Sys::from(SYS.get_task_id()); | ||
|
|
||
| let (led, rising, falling) = if let Some(config) = TASK_CONFIG { | ||
| (config.led, config.rising, config.falling) | ||
| } else { | ||
| (0, false, true) | ||
| }; | ||
|
|
||
| sys.gpio_configure_input( | ||
| PinSet { | ||
| port: Port::C, | ||
| pin_mask: (1 << 13), | ||
| }, | ||
| Pull::None, | ||
| ); | ||
|
|
||
| ringbuf_entry!(Trace::GpioIrqConfigure { | ||
| mask: notifications::BUTTON_MASK, | ||
| rising, | ||
| falling, | ||
| }); | ||
| sys.gpio_irq_configure(notifications::BUTTON_MASK, rising, falling); | ||
|
|
||
| loop { | ||
| // The first argument to `gpio_irq_control` is the mask of interrupts to | ||
| // enable, while the second is the mask to disable. So, enable the | ||
| // button notification. | ||
| let disable_mask = 0; | ||
| ringbuf_entry!(Trace::GpioIrqControl { | ||
| enable_mask: notifications::BUTTON_MASK, | ||
| disable_mask, | ||
| }); | ||
| sys.gpio_irq_control(disable_mask, notifications::BUTTON_MASK); | ||
|
|
||
| // Wait for the user button to be pressed. | ||
| // | ||
| // We only care about notifications, so we can pass a zero-sized recv | ||
| // buffer, and the kernel's task ID. | ||
| let recvmsg = sys_recv_closed( | ||
| &mut [], | ||
| notifications::BUTTON_MASK, | ||
| TaskId::KERNEL, | ||
| ) | ||
| // Recv from the kernel never returns an error. | ||
| .unwrap_lite(); | ||
| let notif = recvmsg.operation; | ||
| ringbuf_entry!(Trace::Notification(notif)); | ||
|
|
||
| // If the notification is for the button, toggle the LED. | ||
| if notif == notifications::BUTTON_MASK { | ||
| ringbuf_entry!(Trace::LedToggle { led }); | ||
| user_leds.led_toggle(led).unwrap_lite(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| include!(concat!(env!("OUT_DIR"), "/notifications.rs")); |