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Timer interrupts #3

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olell opened this issue Jan 5, 2024 · 3 comments
Open

Timer interrupts #3

olell opened this issue Jan 5, 2024 · 3 comments
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@olell
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olell commented Jan 5, 2024

Hey there, first of all thanks for your awesome work!

I have a short question: I'm currently writing firmware to control an LED matrix which requires a function to be called quite regularly, is it possible to use timer interrupts using your HAL to call my display-function? Couldn't really find an example for that and my rust knowledge seems to be not good enough to fully understand the HAL source.

Thanks in advance!
@andelf
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andelf commented Jan 6, 2024 •
edited

Timers are not implemented yet. 🥲 The only option is using the pac part to access the register blocks.

As this crate supports embassy framework. The periodic can be implemented in an "embassy-way".

You can write like the following code. This is my test code for a 7x11 dot-matrix display, wired directly to CH58x's io ports(CH58x has an output lim of 5mA/20mA, so it can drive LEDs directly).

Please note that the code has not been cleaned up yet.

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]

use core::fmt::Write;
use core::writeln;

use embassy_executor::Spawner;
use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
use embassy_sync::channel::Channel;
use embassy_time::Timer;
use embedded_hal_1::delay::DelayNs;
use hal::gpio::{AnyPin, Input, Level, Output, OutputDrive, Pin, Pull};
use hal::interrupt::Interrupt;
use hal::sysctl::Config;
use hal::uart::UartTx;
use hal::{pac, peripherals, println, Peripherals};
use {ch58x_hal as hal, panic_halt as _};

static mut CHAR: [u8; 11] = [0; 11];

#[embassy_executor::task]
async fn dot_matrix_7x11(mut cols: [Output<'static, AnyPin>; 7], mut rows: [Output<'static, AnyPin>; 11]) {
    loop {
        let ch = unsafe { CHAR };

        for r in 0..11 {
            if r > 0 {
                rows[r - 1].set_low();
            } else {
                rows.last_mut().unwrap().set_low();
            }

            let byte = ch[r];

            for c in 0..7 {
                if byte & (1 << c) != 0 {
                    //if byte & (1 << (7 - c-1)) != 0 {
                    cols[c].set_low();
                } else {
                    cols[c].set_high();
                }
            }
            rows[r].set_high();

            Timer::after_micros(100).await;
        }
    }
}
// 0-9

#[embassy_executor::main(entry = "qingke_rt::entry")]
async fn main(spawner: Spawner) -> ! {
    let mut config = hal::Config::default();
    config.clock.use_pll_60mhz().enable_lse();
    config.enable_dcdc = true;
    config.low_power = true;
    config.clock.enable_lse();
    let p = hal::init(config);
    hal::embassy::init();

    let mut download_button = Input::new(p.PB22, Pull::Up);
    let mut reset_button = Input::new(p.PB23, Pull::Up);

    let mut uart = UartTx::new(p.UART1, p.PA9, Default::default()).unwrap();
    unsafe {
        hal::set_default_serial(uart);
    }

    // active low
    let mut cols = [
        Output::new(p.PB0.degrade(), Level::High, OutputDrive::_5mA),
        Output::new(p.PB1.degrade(), Level::High, OutputDrive::_5mA),
        Output::new(p.PB2.degrade(), Level::High, OutputDrive::_5mA),
        Output::new(p.PB3.degrade(), Level::High, OutputDrive::_5mA),
        Output::new(p.PB4.degrade(), Level::High, OutputDrive::_5mA),
        Output::new(p.PB5.degrade(), Level::High, OutputDrive::_5mA),
        Output::new(p.PB6.degrade(), Level::High, OutputDrive::_5mA),
    ];

    // active high
    let mut rows = [
        Output::new(p.PA4.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA5.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA6.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA0.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA1.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA2.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA3.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA15.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA14.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA13.degrade(), Level::Low, OutputDrive::_5mA),
        Output::new(p.PA12.degrade(), Level::Low, OutputDrive::_5mA),
    ];

    spawner.spawn(dot_matrix_7x11(cols, rows)).unwrap();

    const FONT1: &[[u8; 11]] = &[
        // 0-9
        [0x1C, 0x36, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x36, 0x1C],
        [0x18, 0x78, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x7E],
        [0x3E, 0x63, 0x63, 0x63, 0x06, 0x06, 0x0C, 0x18, 0x30, 0x63, 0x7F],
        [0x3E, 0x63, 0x63, 0x06, 0x1C, 0x06, 0x03, 0x03, 0x63, 0x66, 0x3C],
        [0x06, 0x0E, 0x1E, 0x36, 0x36, 0x66, 0x66, 0x7F, 0x06, 0x06, 0x1F],
        [0x7F, 0x60, 0x60, 0x60, 0x7C, 0x76, 0x03, 0x03, 0x63, 0x66, 0x3C],
        [0x1E, 0x36, 0x60, 0x60, 0x7C, 0x76, 0x63, 0x63, 0x63, 0x36, 0x1C],
        [0x7F, 0x66, 0x66, 0x0C, 0x0C, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18],
        [0x3E, 0x63, 0x63, 0x63, 0x36, 0x1C, 0x36, 0x63, 0x63, 0x63, 0x3E],
        [0x1C, 0x36, 0x63, 0x63, 0x63, 0x37, 0x1F, 0x03, 0x03, 0x36, 0x3C],
    ];

    // https://github.com/o-m-d/st7735_spi_stm32/blob/89c4e23df4578802f1aac610c715e15a3824e941/font7x11.h#L4
    const FONT: &[[u8; 11]] = &[
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // space 0x20  32
        [0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x08, 0x08], // ! 0x21  33
        [0x12, 0x12, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // " 0x22  34
        [0x48, 0x48, 0x24, 0x7f, 0x24, 0x24, 0x12, 0x7f, 0x12, 0x09, 0x09], // # 0x23  35
        [0x08, 0x3e, 0x49, 0x09, 0x09, 0x3e, 0x48, 0x48, 0x49, 0x3e, 0x08], // $ 0x24  36
        [0x47, 0x25, 0x27, 0x10, 0x10, 0x08, 0x08, 0x04, 0x72, 0x52, 0x71], // % 0x25  37
        [0x06, 0x09, 0x09, 0x09, 0x26, 0x22, 0x25, 0x29, 0x11, 0x29, 0x46], // & 0x26  38
        [0x08, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // ' 0x27  39
        [0x08, 0x04, 0x04, 0x02, 0x02, 0x02, 0x02, 0x02, 0x04, 0x04, 0x08], // ( 0x28  40
        [0x04, 0x08, 0x08, 0x10, 0x10, 0x10, 0x10, 0x10, 0x08, 0x08, 0x04], // ) 0x29  41
        [0x00, 0x08, 0x2a, 0x1c, 0x2a, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00], // * 0x2A  42
        [0x00, 0x00, 0x00, 0x08, 0x08, 0x3e, 0x08, 0x08, 0x00, 0x00, 0x00], // + 0x2B  43
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x0c, 0x04], // , 0x2C  44
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00], // - 0x2D  45
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18], // . 0x2E  46
        [0x10, 0x10, 0x10, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x02, 0x02], // / 0x2F  47
        [0x1c, 0x22, 0x51, 0x51, 0x49, 0x49, 0x49, 0x45, 0x45, 0x22, 0x1c], // 0 0x30  48
        [0x08, 0x0c, 0x0a, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x3e], // 1 0x31  49
        [0x1e, 0x21, 0x40, 0x40, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x7f], // 2 0x32  50
        [0x1f, 0x20, 0x40, 0x40, 0x20, 0x1e, 0x20, 0x40, 0x40, 0x20, 0x1f], // 3 0x33  51
        [0x30, 0x28, 0x24, 0x22, 0x21, 0x7f, 0x20, 0x20, 0x20, 0x20, 0x20], // 4 0x34  52
        [0x7f, 0x01, 0x01, 0x01, 0x1f, 0x20, 0x40, 0x40, 0x40, 0x20, 0x1f], // 5 0x35  53
        [0x38, 0x04, 0x02, 0x01, 0x1d, 0x23, 0x41, 0x41, 0x41, 0x22, 0x1c], // 6 0x36  54
        [0x7f, 0x40, 0x20, 0x20, 0x10, 0x10, 0x08, 0x08, 0x04, 0x04, 0x02], // 7 0x37  55
        [0x1c, 0x22, 0x41, 0x41, 0x22, 0x1c, 0x22, 0x41, 0x41, 0x22, 0x1c], // 8 0x38  56
        [0x1c, 0x22, 0x41, 0x41, 0x41, 0x62, 0x5c, 0x40, 0x20, 0x10, 0x0e], // 9 0x39  57
        [0x00, 0x00, 0x0c, 0x0c, 0x00, 0x00, 0x00, 0x0c, 0x0c, 0x00, 0x00], // : 0x3A  58
        [0x00, 0x00, 0x0c, 0x0c, 0x00, 0x00, 0x00, 0x0c, 0x0c, 0x08, 0x04], // ; 0x3B  59
        [0x00, 0x40, 0x30, 0x0c, 0x02, 0x01, 0x02, 0x0c, 0x30, 0x40, 0x00], // < 0x3C  60
        [0x00, 0x00, 0x00, 0x00, 0x7f, 0x00, 0x00, 0x7f, 0x00, 0x00, 0x00], // = 0x3D  61
        [0x00, 0x01, 0x06, 0x18, 0x20, 0x40, 0x20, 0x18, 0x06, 0x01, 0x00], // > 0x3E  62
        [0x3e, 0x41, 0x40, 0x40, 0x30, 0x08, 0x08, 0x08, 0x00, 0x08, 0x08], // ? 0x3F  63
        [0x1c, 0x22, 0x41, 0x49, 0x55, 0x55, 0x55, 0x39, 0x01, 0x02, 0x3c], // @ 0x40  64
        [0x08, 0x14, 0x14, 0x22, 0x22, 0x41, 0x41, 0x7f, 0x41, 0x41, 0x41], // A 0x41  65
        [0x1f, 0x21, 0x21, 0x21, 0x1f, 0x21, 0x41, 0x41, 0x41, 0x21, 0x1f], // B 0x42  66
        [0x3c, 0x42, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x42, 0x3c], // C 0x43  67
        [0x1f, 0x22, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x22, 0x1f], // D 0x44  68
        [0x7f, 0x01, 0x01, 0x01, 0x1f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f], // E 0x45  69
        [0x7f, 0x01, 0x01, 0x01, 0x3f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01], // F 0x46  70
        [0x3c, 0x42, 0x01, 0x01, 0x01, 0x79, 0x41, 0x41, 0x41, 0x42, 0x3c], // G 0x47  71
        [0x41, 0x41, 0x41, 0x41, 0x7f, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41], // H 0x48  72
        [0x1c, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x1c], // I 0x49  73
        [0x1e, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x11, 0x0e], // J 0x4A  74
        [0x21, 0x11, 0x09, 0x05, 0x03, 0x03, 0x05, 0x09, 0x11, 0x21, 0x41], // K 0x4B  75
        [0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f], // L 0x4C  76
        [0x41, 0x63, 0x55, 0x55, 0x49, 0x49, 0x41, 0x41, 0x41, 0x41, 0x41], // M 0x4D  77
        [0x41, 0x41, 0x41, 0x43, 0x43, 0x45, 0x49, 0x51, 0x51, 0x61, 0x41], // N 0x4E  78
        [0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c], // O 0x4F  79
        [0x1f, 0x21, 0x41, 0x41, 0x41, 0x21, 0x1f, 0x01, 0x01, 0x01, 0x01], // P 0x50  80
        [0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x41, 0x49, 0x51, 0x22, 0x5c], // Q 0x51  81
        [0x1f, 0x21, 0x41, 0x41, 0x41, 0x21, 0x1f, 0x09, 0x11, 0x21, 0x41], // R 0x52  82
        [0x1c, 0x22, 0x41, 0x01, 0x02, 0x1c, 0x20, 0x40, 0x41, 0x22, 0x1c], // S 0x53  83
        [0x7f, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08], // T 0x54  84
        [0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c], // U 0x55  85
        [0x41, 0x41, 0x22, 0x22, 0x22, 0x22, 0x14, 0x14, 0x14, 0x08, 0x08], // V 0x56  86
        [0x41, 0x41, 0x41, 0x41, 0x49, 0x49, 0x49, 0x55, 0x55, 0x63, 0x41], // W 0x57  87
        [0x41, 0x22, 0x22, 0x14, 0x08, 0x08, 0x08, 0x14, 0x22, 0x22, 0x41], // X 0x58  88
        [0x41, 0x41, 0x22, 0x14, 0x14, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08], // Y 0x59  89
        [0x7f, 0x40, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01, 0x01, 0x7f], // Z 0x5A  90
        [0x1c, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x1c], // [ 0x5B  91
        [0x01, 0x02, 0x02, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x10, 0x10], // \ 0x5C  92
        [0x0e, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x0e], // ] 0x5D  93
        [0x08, 0x14, 0x22, 0x41, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // ^ 0x5E  94
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f], // _ 0x5F  95
        [0x04, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // ` 0x60  96
        [0x00, 0x00, 0x00, 0x3e, 0x41, 0x40, 0x7e, 0x41, 0x41, 0x61, 0x5e], // a 0x61  97
        [0x01, 0x01, 0x01, 0x1d, 0x23, 0x41, 0x41, 0x41, 0x41, 0x23, 0x1d], // b 0x62  98
        [0x00, 0x00, 0x00, 0x3c, 0x42, 0x01, 0x01, 0x01, 0x01, 0x42, 0x3c], // c 0x63  99
        [0x40, 0x40, 0x40, 0x5c, 0x62, 0x41, 0x41, 0x41, 0x41, 0x62, 0x5c], // d 0x64 100
        [0x00, 0x00, 0x00, 0x1c, 0x22, 0x41, 0x7f, 0x01, 0x01, 0x42, 0x3c], // e 0x65 101
        [0x1c, 0x04, 0x04, 0x0e, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04], // f 0x66 102
        [0x00, 0x00, 0x00, 0x5e, 0x61, 0x41, 0x61, 0x5e, 0x40, 0x21, 0x1e], // g 0x67 103
        [0x01, 0x01, 0x01, 0x3d, 0x43, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41], // h 0x68 104
        [0x08, 0x08, 0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08], // i 0x69 105
        [0x00, 0x10, 0x00, 0x18, 0x10, 0x10, 0x10, 0x10, 0x10, 0x12, 0x0c], // j 0x6A 106
        [0x01, 0x01, 0x01, 0x21, 0x11, 0x09, 0x07, 0x09, 0x11, 0x21, 0x41], // k 0x6B 107
        [0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x0c], // l 0x6C 108
        [0x00, 0x00, 0x00, 0x25, 0x5b, 0x49, 0x49, 0x49, 0x49, 0x49, 0x49], // m 0x6D 109
        [0x00, 0x00, 0x00, 0x1d, 0x23, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41], // n 0x6E 110
        [0x00, 0x00, 0x00, 0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c], // o 0x6F 111
        [0x00, 0x00, 0x00, 0x1f, 0x21, 0x41, 0x41, 0x21, 0x1f, 0x01, 0x01], // p 0x70 112
        [0x00, 0x00, 0x00, 0x2c, 0x32, 0x21, 0x21, 0x21, 0x32, 0x2c, 0x20], // q 0x71 113
        [0x00, 0x00, 0x00, 0x3d, 0x43, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01], // r 0x72 114
        [0x00, 0x00, 0x00, 0x3e, 0x41, 0x01, 0x0e, 0x30, 0x40, 0x41, 0x3e], // s 0x73 115
        [0x00, 0x04, 0x04, 0x3e, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x38], // t 0x74 116
        [0x00, 0x00, 0x00, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x31, 0x2e], // u 0x75 117
        [0x00, 0x00, 0x00, 0x41, 0x41, 0x22, 0x22, 0x14, 0x14, 0x08, 0x08], // v 0x76 118
        [0x00, 0x00, 0x00, 0x41, 0x41, 0x41, 0x49, 0x49, 0x49, 0x49, 0x36], // w 0x77 119
        [0x00, 0x00, 0x00, 0x41, 0x22, 0x14, 0x08, 0x08, 0x14, 0x22, 0x41], // x 0x78 120
        [0x00, 0x00, 0x00, 0x42, 0x42, 0x42, 0x24, 0x38, 0x10, 0x08, 0x06], // y 0x79 121
        [0x00, 0x00, 0x00, 0x7f, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01, 0x7f], // z 0x7A 122
        [0x18, 0x08, 0x08, 0x08, 0x04, 0x06, 0x04, 0x08, 0x08, 0x08, 0x18], // { 0x7B 123
        [0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08], // | 0x7C 124
        [0x0c, 0x08, 0x08, 0x08, 0x10, 0x30, 0x10, 0x08, 0x08, 0x08, 0x0c], // } 0x7D 125
        [0x00, 0x00, 0x00, 0x00, 0x04, 0x0a, 0x51, 0x20, 0x00, 0x00, 0x00], // ~ 0x7E 126
        [0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f], //  0x7F 127
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // (NBSP) 0xA0 160
        [0x55, 0x49, 0x42, 0x22, 0x24, 0x24, 0x18, 0x10, 0x08, 0x04, 0x03], // Ў 0xA1 161
        [0x00, 0x14, 0x08, 0x41, 0x41, 0x42, 0x24, 0x38, 0x10, 0x08, 0x06], // ў 0xA2 162
        [0x1e, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x11, 0x0e], // Ј 0xA3 163
        [0x00, 0x00, 0x00, 0x21, 0x1e, 0x12, 0x12, 0x1e, 0x21, 0x00, 0x00], // ¤ 0xA4 164
        [0x40, 0x7f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01], // Ґ 0xA5 165
        [0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00, 0x08, 0x08, 0x08, 0x08], // ¦ 0xA6 166
        [0x10, 0x08, 0x04, 0x08, 0x14, 0x22, 0x14, 0x08, 0x10, 0x08, 0x04], // § 0xA7 167
        [0x14, 0x7f, 0x01, 0x01, 0x01, 0x1f, 0x01, 0x01, 0x01, 0x01, 0x7f], // Ё 0xA8 168
        [0x1c, 0x22, 0x41, 0x5d, 0x45, 0x45, 0x45, 0x5d, 0x41, 0x22, 0x1c], // © 0xA9 169
        [0x3c, 0x42, 0x01, 0x01, 0x01, 0x1f, 0x01, 0x01, 0x01, 0x42, 0x3c], // Є 0xAA 170
        [0x00, 0x00, 0x00, 0x48, 0x24, 0x12, 0x09, 0x12, 0x24, 0x48, 0x00], // « 0xAB 171
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x40, 0x40, 0x00, 0x00, 0x00], // ¬ 0xAC 172
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00], // - (hyphen) 0xAD 173
        [0x3e, 0x41, 0x41, 0x5d, 0x55, 0x4d, 0x55, 0x55, 0x41, 0x41, 0x3e], // ® 0xAE 174
        [0x14, 0x00, 0x1c, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x1c], // Ї 0xAF 175
        [0x00, 0x00, 0x1c, 0x22, 0x22, 0x22, 0x1c, 0x00, 0x00, 0x00, 0x00], // ° 0xB0 176
        [0x00, 0x00, 0x08, 0x08, 0x3e, 0x08, 0x08, 0x00, 0x3e, 0x00, 0x00], // ± 0xB1 177
        [0x1c, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x1c], // І 0xB2 178
        [0x08, 0x08, 0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08], // і 0xB3 179
        [0x00, 0x00, 0x20, 0x3f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01], // ґ 0xB4 180
        [0x00, 0x00, 0x00, 0x22, 0x22, 0x22, 0x22, 0x22, 0x5e, 0x02, 0x01], // µ 0xB5 181
        [0x00, 0x7e, 0x27, 0x26, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24], // ¶ 0xB6 182
        [0x00, 0x00, 0x00, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // · 0xB7 183
        [0x00, 0x12, 0x00, 0x1c, 0x22, 0x41, 0x7f, 0x01, 0x01, 0x22, 0x1c], // ё 0xB8 184
        [0x70, 0x50, 0x70, 0x00, 0x43, 0x45, 0x49, 0x51, 0x61, 0x41, 0x41], // № 0xB9 185
        [0x00, 0x00, 0x00, 0x3c, 0x42, 0x01, 0x1f, 0x01, 0x01, 0x42, 0x3c], // є 0xBA 186
        [0x00, 0x00, 0x00, 0x09, 0x12, 0x24, 0x48, 0x24, 0x12, 0x09, 0x00], // » 0xBB 187
        [0x00, 0x10, 0x00, 0x18, 0x10, 0x10, 0x10, 0x10, 0x10, 0x12, 0x0c], // ј 0xBC 188
        [0x1c, 0x22, 0x41, 0x01, 0x02, 0x1c, 0x20, 0x40, 0x41, 0x22, 0x1c], // Ѕ 0xBD 189
        [0x00, 0x00, 0x00, 0x3e, 0x41, 0x01, 0x0e, 0x30, 0x40, 0x41, 0x3e], // ѕ 0xBE 190
        [0x00, 0x14, 0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08], // ї 0xBF 191
        [0x08, 0x14, 0x14, 0x22, 0x22, 0x41, 0x41, 0x7f, 0x41, 0x41, 0x41], // А 0xC0 192
        [0x7f, 0x01, 0x01, 0x01, 0x1f, 0x21, 0x41, 0x41, 0x41, 0x21, 0x1f], // Б 0xC1 193
        [0x1f, 0x21, 0x21, 0x21, 0x1f, 0x21, 0x41, 0x41, 0x41, 0x21, 0x1f], // В 0xC2 194
        [0x7f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01], // Г 0xC3 195
        [0x3e, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x7f], // Д 0xC4 196
        [0x7f, 0x01, 0x01, 0x01, 0x1f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f], // Е 0xC5 197
        [0x49, 0x49, 0x49, 0x2a, 0x1c, 0x1c, 0x2a, 0x2a, 0x49, 0x49, 0x49], // Ж 0xC6 198
        [0x1e, 0x21, 0x40, 0x40, 0x20, 0x1e, 0x20, 0x40, 0x40, 0x21, 0x1e], // З 0xC7 199
        [0x41, 0x61, 0x51, 0x51, 0x49, 0x45, 0x45, 0x43, 0x41, 0x41, 0x41], // И 0xC8 200
        [0x4d, 0x61, 0x51, 0x51, 0x49, 0x45, 0x45, 0x43, 0x41, 0x41, 0x41], // Й 0xC9 201
        [0x61, 0x11, 0x09, 0x09, 0x05, 0x03, 0x05, 0x09, 0x11, 0x21, 0x41], // К 0xCA 202
        [0x78, 0x44, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x41], // Л 0xCB 203
        [0x41, 0x63, 0x55, 0x55, 0x49, 0x49, 0x41, 0x41, 0x41, 0x41, 0x41], // М 0xCC 204
        [0x41, 0x41, 0x41, 0x41, 0x7f, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41], // Н 0xCD 205
        [0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c], // О 0xCE 206
        [0x7f, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41], // П 0xCF 207
        [0x1f, 0x21, 0x41, 0x41, 0x41, 0x21, 0x1f, 0x01, 0x01, 0x01, 0x01], // Р 0xD0 208
        [0x3c, 0x42, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x42, 0x3c], // С 0xD1 209
        [0x7f, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08], // Т 0xD2 210
        [0x41, 0x41, 0x42, 0x22, 0x24, 0x24, 0x18, 0x10, 0x08, 0x04, 0x03], // У 0xD3 211
        [0x08, 0x1c, 0x2a, 0x49, 0x49, 0x49, 0x49, 0x49, 0x2a, 0x1c, 0x08], // Ф 0xD4 212
        [0x41, 0x22, 0x22, 0x14, 0x08, 0x08, 0x08, 0x14, 0x22, 0x22, 0x41], // Х 0xD5 213
        [0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x3f, 0x40], // Ц 0xD6 214
        [0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x7e, 0x40, 0x40, 0x40, 0x40], // Ч 0xD7 215
        [0x41, 0x41, 0x41, 0x49, 0x49, 0x49, 0x49, 0x49, 0x49, 0x49, 0x7f], // Ш 0xD8 216
        [0x41, 0x41, 0x41, 0x49, 0x49, 0x49, 0x49, 0x49, 0x49, 0x7f, 0x40], // Щ 0xD9 217
        [0x03, 0x02, 0x02, 0x02, 0x1e, 0x22, 0x42, 0x42, 0x42, 0x22, 0x1e], // Ъ 0xDA 218
        [0x41, 0x41, 0x41, 0x41, 0x47, 0x49, 0x51, 0x51, 0x51, 0x49, 0x47], // Ы 0xDB 219
        [0x01, 0x01, 0x01, 0x01, 0x1f, 0x21, 0x41, 0x41, 0x41, 0x21, 0x1f], // Ь 0xDC 220
        [0x0f, 0x30, 0x20, 0x40, 0x40, 0x7c, 0x40, 0x40, 0x20, 0x30, 0x0f], // Э 0xDD 221
        [0x11, 0x29, 0x45, 0x45, 0x45, 0x47, 0x45, 0x45, 0x45, 0x29, 0x11], // Ю 0xDE 222
        [0x7c, 0x42, 0x41, 0x41, 0x41, 0x42, 0x7c, 0x48, 0x44, 0x42, 0x41], // Я 0xDF 223
        [0x00, 0x00, 0x00, 0x3e, 0x41, 0x40, 0x7e, 0x41, 0x41, 0x61, 0x5e], // а 0xE0 224
        [0x1c, 0x02, 0x01, 0x1d, 0x23, 0x41, 0x41, 0x41, 0x41, 0x23, 0x1d], // б 0xE1 225
        [0x00, 0x00, 0x00, 0x1f, 0x21, 0x21, 0x1f, 0x21, 0x21, 0x21, 0x1f], // в 0xE2 226
        [0x00, 0x00, 0x00, 0x3f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01], // г 0xE3 227
        [0x00, 0x00, 0x00, 0x3c, 0x22, 0x22, 0x22, 0x21, 0x21, 0x21, 0x7f], // д 0xE4 228
        [0x00, 0x00, 0x00, 0x1c, 0x22, 0x41, 0x7f, 0x01, 0x01, 0x42, 0x3c], // е 0xE5 229
        [0x00, 0x00, 0x00, 0x49, 0x49, 0x2a, 0x1c, 0x2a, 0x49, 0x49, 0x49], // ж 0xE6 230
        [0x00, 0x00, 0x00, 0x3e, 0x41, 0x40, 0x3c, 0x40, 0x40, 0x41, 0x3e], // з 0xE7 231
        [0x00, 0x00, 0x00, 0x21, 0x21, 0x31, 0x29, 0x25, 0x25, 0x23, 0x21], // и 0xE8 232
        [0x00, 0x00, 0x00, 0x2d, 0x21, 0x31, 0x29, 0x25, 0x25, 0x23, 0x21], // й 0xE9 233
        [0x00, 0x00, 0x00, 0x61, 0x11, 0x09, 0x07, 0x09, 0x11, 0x21, 0x41], // к 0xEA 234
        [0x00, 0x00, 0x00, 0x78, 0x44, 0x42, 0x42, 0x42, 0x42, 0x42, 0x41], // л 0xEB 235
        [0x00, 0x00, 0x00, 0x41, 0x63, 0x55, 0x49, 0x41, 0x41, 0x41, 0x41], // м 0xEC 236
        [0x00, 0x00, 0x00, 0x41, 0x41, 0x41, 0x7f, 0x41, 0x41, 0x41, 0x41], // н 0xED 237
        [0x00, 0x00, 0x00, 0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c], // о 0xEE 238
        [0x00, 0x00, 0x00, 0x7f, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41], // п 0xEF 239
        [0x00, 0x00, 0x00, 0x1d, 0x23, 0x41, 0x41, 0x23, 0x1d, 0x01, 0x01], // р 0xF0 240
        [0x00, 0x00, 0x00, 0x3c, 0x42, 0x01, 0x01, 0x01, 0x01, 0x42, 0x3c], // с 0xF1 241
        [0x00, 0x00, 0x00, 0x7f, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08], // т 0xF2 242
        [0x00, 0x00, 0x00, 0x41, 0x41, 0x42, 0x24, 0x38, 0x10, 0x08, 0x06], // у 0xF3 243
        [0x00, 0x00, 0x00, 0x08, 0x1c, 0x2a, 0x49, 0x49, 0x2a, 0x1c, 0x08], // ф 0xF4 244
        [0x00, 0x00, 0x00, 0x41, 0x22, 0x14, 0x08, 0x08, 0x14, 0x22, 0x41], // х 0xF5 245
        [0x00, 0x00, 0x00, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x3e, 0x40], // ц 0xF6 246
        [0x00, 0x00, 0x00, 0x41, 0x41, 0x41, 0x41, 0x7e, 0x40, 0x40, 0x40], // ч 0xF7 247
        [0x00, 0x00, 0x00, 0x41, 0x41, 0x49, 0x49, 0x49, 0x49, 0x49, 0x7f], // ш 0xF8 248
        [0x00, 0x00, 0x00, 0x41, 0x41, 0x49, 0x49, 0x49, 0x49, 0x7f, 0x40], // щ 0xF9 249
        [0x00, 0x00, 0x00, 0x03, 0x02, 0x02, 0x3e, 0x42, 0x42, 0x42, 0x3e], // ъ 0xFA 250
        [0x00, 0x00, 0x00, 0x41, 0x41, 0x41, 0x4f, 0x51, 0x51, 0x51, 0x4f], // ы 0xFB 251
        [0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x3f, 0x41, 0x41, 0x41, 0x3f], // ь 0xFC 252
        [0x00, 0x00, 0x00, 0x1e, 0x21, 0x40, 0x7c, 0x40, 0x40, 0x21, 0x1e], // э 0xFD 253
        [0x00, 0x00, 0x00, 0x11, 0x29, 0x45, 0x47, 0x47, 0x45, 0x29, 0x11], // ю 0xFE 254
        [0x00, 0x00, 0x00, 0x7e, 0x41, 0x41, 0x41, 0x7e, 0x48, 0x44, 0x42], // я 0xFF 255
    ];

    loop {
        for i in 0..FONT1.len() {
            unsafe {
                CHAR = FONT1[i];
            }
            Timer::after_millis(1000).await;
        }
    }

}

@andelf andelf added the question Further information is requested label Jan 6, 2024
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andelf commented Jan 6, 2024

Timer allows performing async delays. Ticker allows periodic delays without drifting over time.

FYI: https://docs.rs/embassy-time/latest/embassy_time/

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andelf commented Jan 6, 2024 •
edited

The asnync tasks and .await uses the underlying embassy_timer_driver for timing and task swap.
In ch58x-hal, I use the 64-bit SysTick to implement it, backed by a 32768Hz div interrupt.

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