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/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ //! Watch Face Framework for Rust + Mynewt on PineTime Smart Watch #![no_std] // Don't link with standard Rust library, which is not compatible with embedded systems #![feature(trace_macros)] // Allow macro tracing: `trace_macros!(true)` #![feature(concat_idents)] // Allow `concat_idents!()` macro used in `coap!()` macro #![feature(proc_macro_hygiene)] // Allow Procedural Macros like `run!()` #![feature(exclusive_range_pattern)] // Allow ranges like `0..128` in `match` statements // Declare the libraries that contain macros extern crate macros as mynewt_macros; // Declare the Mynewt Procedural Macros library pub use lvgl; // Export LVGL API use core::{ ptr, }; use lvgl::mynewt::{ fill_zero, kernel::os, result::*, sys::console, Strn, }; use lvgl::{ core::{ disp, obj }, }; /////////////////////////////////////////////////////////////////////////////// // Watch Face Trait /// Watch Faces shall implement this trait pub trait WatchFace { /// Create the widgets for the Watch Face fn new() -> MynewtResult<Self> where Self: core::marker::Sized; // Result type must have known size /// Update the widgets in the Watch Face with the current state fn update(&mut self, state: &WatchFaceState) -> MynewtResult<()>; } /////////////////////////////////////////////////////////////////////////////// // Mynewt Timer Functions /// Start rendering the watch face every minute pub fn start_watch_face(update_watch_face: UpdateWatchFace) -> MynewtResult<()> { console::print("Init Rust watch face...\n"); console::flush(); // Save the callback for updating the watch face unsafe { UPDATE_WATCH_FACE = Some(update_watch_face); } // Get active screen from LVGL let screen = get_active_screen(); // Allow touch events obj::set_click(screen, true) ? ; // Set a timer to update the watch face every minute unsafe { // Unsafe because os_callout_init is a Mynewt C function os::os_callout_init( &mut WATCH_FACE_CALLOUT, // Timer for the watch face os::eventq_dflt_get().unwrap(), // Use default event queue Some(watch_face_callback), // Callback function for the timer ptr::null_mut() // No argument ); } // Trigger the watch face timer now to render the watch face for the first time let rc = unsafe { // Unsafe because os_callout_reset is a Mynewt C function os::os_callout_reset( &mut WATCH_FACE_CALLOUT, // Timer for the watch face os::OS_TICKS_PER_SEC * 0 // Trigger the timer now ) }; assert!(rc == 0, "Timer fail"); Ok(()) } /// Timer callback that is called every minute extern fn watch_face_callback(_ev: *mut os::os_event) { console::print("Update Rust watch face...\n"); console::flush(); // If there is no callback, fail. assert!(unsafe { UPDATE_WATCH_FACE.is_some() }, "Update watch face missing"); // Get the system time let time = get_system_time() .expect("Can't get system time"); // Compose the watch face state let state = WatchFaceState { time, millivolts: 0, // TODO: Get current voltage charging: true, // TODO: Get charging status powered: true, // TODO: Get powered status bluetooth: BluetoothState::BLUETOOTH_STATE_CONNECTED, // TODO: Get BLE state }; // Update the watch face unsafe { // Unsafe because WATCH_FACE is a mutable static UPDATE_WATCH_FACE.unwrap()(&state) .expect("Update Watch Face fail"); } // Render the watch face let rc = unsafe { pinetime_lvgl_mynewt_render() }; assert!(rc == 0, "LVGL render fail"); // Trigger the watch face timer in 60 seconds let rc = unsafe { // Unsafe because os_callout_reset is a Mynewt C function os::os_callout_reset( &mut WATCH_FACE_CALLOUT, // Timer for the watch face os::OS_TICKS_PER_SEC * 60 // Trigger timer in 60 seconds ) }; assert!(rc == 0, "Timer fail"); } /// Get active screen from LVGL pub fn get_active_screen() -> lvgl::Ptr { // Get active screen from LVGL let screen = disp::get_scr_act( disp::get_default() .expect("Failed to get display") ).expect("Failed to get active display"); assert!(!screen.is_null(), "null screen"); screen } /// Timer that is triggered every minute to update the watch face static mut WATCH_FACE_CALLOUT: os::os_callout = fill_zero!(os::os_callout); /// Called every minute to update the Watch Face static mut UPDATE_WATCH_FACE: Option<UpdateWatchFace> = None; /// Type of callback to update the Watch Face type UpdateWatchFace = fn (state: &WatchFaceState) -> MynewtResult<()>; /////////////////////////////////////////////////////////////////////////////// // Date Time Functions /// Get the system time fn get_system_time() -> MynewtResult<WatchFaceTime> { // Get the system time static mut TV: os::os_timeval = fill_zero!(os::os_timeval); static mut TZ: os::os_timezone = fill_zero!(os::os_timezone); let rc = unsafe { os::os_gettimeofday(&mut TV, &mut TZ) }; assert!(rc == 0, "Can't get time"); // Convert the time static mut CT: clocktime = fill_zero!(clocktime); let rc = unsafe { timeval_to_clocktime(&TV, &TZ, &mut CT) }; assert!(rc == 0, "Can't convert time"); // Return the time let result = unsafe { // Unsafe because CT is a mutable static WatchFaceTime { year: CT.year as u16, // Year (4 digit year) month: CT.mon as u8, // Month (1 - 12) day: CT.day as u8, // Day (1 - 31) hour: CT.hour as u8, // Hour (0 - 23) minute: CT.min as u8, // Minute (0 - 59) second: CT.sec as u8, // Second (0 - 59) day_of_week: CT.dow as u8, // Day of week (0 - 6; 0 = Sunday) } }; Ok(result) } /////////////////////////////////////////////////////////////////////////////// // String Definitions /// Create a new String pub const fn new_string() -> String { heapless::String(heapless::i::String::new()) } /// Convert a static String to null-terminated Strn pub fn to_strn(str: &String) -> Strn { Strn::new(str.as_bytes()) } /// Limit Strings to 64 chars (which may include multiple color codes like "#ffffff") pub type String = heapless::String::<heapless::consts::U64>; /////////////////////////////////////////////////////////////////////////////// // Watch Face Definitions /// State for the Watch Face #[repr(C)] // Allow this struct to be passed to C (for WebAssembly integration) pub struct WatchFaceState { /// Current date and time pub time: WatchFaceTime, /// Bluetooth state pub bluetooth: BluetoothState, /// Current power pub millivolts: u32, /// True if watch is charging pub charging: bool, /// True if watch is powered pub powered: bool, } /// Watch Face Time #[repr(C)] // Allow this struct to be passed to C (for WebAssembly integration) pub struct WatchFaceTime { /// Year (4 digit year) pub year: u16, /// Month (1 - 12) pub month: u8, /// Day (1 - 31) pub day: u8, /// Hour (0 - 23) pub hour: u8, /// Minute (0 - 59) pub minute: u8, /// Second (0 - 59) pub second: u8, /// Day of week (0 - 6; 0 = Sunday) pub day_of_week: u8, } /// Bluetooth State #[repr(u8)] // Store the enum as 1 byte, so that we can pass this enum to C (for WebAssembly integration) #[derive(PartialEq)] // Allow comparison of enum #[allow(dead_code)] // TODO: Use all enum values #[allow(non_camel_case_types)] pub enum BluetoothState { /// Bluetooth is inactive BLUETOOTH_STATE_INACTIVE = 0, /// Bluetooth is advertising BLUETOOTH_STATE_ADVERTISING = 1, /// Bluetooth is disconnected BLUETOOTH_STATE_DISCONNECTED = 2, /// Bluetooth is connected BLUETOOTH_STATE_CONNECTED = 3, } /////////////////////////////////////////////////////////////////////////////// // Import C APIs extern { /// Render the LVGL display. Defined in libs/pinetime_lvgl_mynewt/src/pinetime/lvgl.c fn pinetime_lvgl_mynewt_render() -> i32; /// Convert timeval to clocktime. From https://github.com/apache/mynewt-core/blob/master/time/datetime/include/datetime/datetime.h fn timeval_to_clocktime(tv: *const os::os_timeval, tz: *const os::os_timezone, ct: *mut clocktime) -> i32; } /// Mynewt Clock Time. From https://github.com/apache/mynewt-core/blob/master/time/datetime/include/datetime/datetime.h #[repr(C)] // Allow this struct to be passed to Mynewt in C struct clocktime { year: i32, // Year (4 digit year) mon: i32, // Month (1 - 12) day: i32, // Day (1 - 31) hour: i32, // Hour (0 - 23) min: i32, // Minute (0 - 59) sec: i32, // Second (0 - 59) dow: i32, // Day of week (0 - 6; 0 = Sunday) usec: i32, // Micro seconds }