107 lines
3.1 KiB
Rust
107 lines
3.1 KiB
Rust
#![deny(unsafe_code)]
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#![no_std]
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#![no_main]
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// mod i2c_reg_slave;
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// mod i2c_slave;
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mod dmx;
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// extern crate panic_halt;
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extern crate panic_semihosting;
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#[rtic::app(device = stm32f1xx_hal::pac, dispatchers = [DMA1_CHANNEL4])]
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mod app {
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use cortex_m::singleton;
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use stm32f1xx_hal::{gpio, pac, prelude::*, serial, timer};
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use systick_monotonic::Systick;
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use crate::dmx::DMX;
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// A monotonic timer to enable scheduling in RTIC
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#[monotonic(binds = SysTick, default = true)]
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type MyMono = Systick<100>; // 100 Hz / 10 ms granularity
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#[shared]
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struct Shared {
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buffer: &'static mut [u8; 512],
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}
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#[local]
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struct Local {
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dmx: DMX,
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delay_us: timer::DelayUs<pac::TIM2>,
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led: gpio::gpioc::PC13<gpio::Output>,
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}
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#[init]
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fn init(cx: init::Context) -> (Shared, Local, init::Monotonics) {
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// Take ownership over the raw flash and rcc devices and convert them into the corresponding
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// HAL structs
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let mut flash = cx.device.FLASH.constrain();
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let rcc = cx.device.RCC.constrain();
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// Freeze the configuration of all the clocks in the system and store the frozen frequencies in
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// `clocks`
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let clocks = rcc
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.cfgr
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// hf external quartz frequency
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.use_hse(8.MHz())
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// system clock frequency
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.sysclk(72.MHz())
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.freeze(&mut flash.acr);
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// Initialize the monotonic
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let mono = Systick::new(cx.core.SYST, clocks.sysclk().to_Hz());
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// Acquire the peripherals
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let mut gpioa = cx.device.GPIOA.split();
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let mut gpioc = cx.device.GPIOC.split();
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let mut afio = cx.device.AFIO.constrain();
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let dma1 = cx.device.DMA1.split();
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// Serial config
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let serial = serial::Serial::new(
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cx.device.USART1,
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(
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gpioa.pa9.into_alternate_open_drain(&mut gpioa.crh),
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gpioa.pa10, //.into_pull_up_input(&mut gpioa.crh),
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),
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&mut afio.mapr,
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serial::Config::default(),
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&clocks,
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);
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(
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Shared {
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buffer: singleton!(: [u8; 512] = [0b01010101; 512]).unwrap(),
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},
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Local {
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dmx: DMX::new(serial, dma1.4, &clocks),
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// Configure timer
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delay_us: cx.device.TIM2.delay_us(&clocks),
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// Configure gpio C pin 13 as a push-pull output. The `crh` register is passed to the function
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// in order to configure the port. For pins 0-7, crl should be passed instead.
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led: gpioc.pc13.into_push_pull_output(&mut gpioc.crh),
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},
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init::Monotonics(mono),
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)
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}
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#[idle(local = [dmx, delay_us, led], shared = [&buffer])]
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fn idle(cx: idle::Context) -> ! {
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loop {
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cx.local.dmx.send(cx.shared.buffer);
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cx.local.delay_us.delay(1.secs());
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cx.local.led.set_high();
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cx.local.delay_us.delay(1.secs());
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cx.local.led.set_low();
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cx.local.dmx.wait();
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}
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}
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}
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