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66 lines
1.9 KiB
66 lines
1.9 KiB
#![no_std]
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#![no_main]
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use cortex_m_rt::entry;
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use embedded_hal::digital::v2::{InputPin, OutputPin};
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use stm32f1xx_hal::{delay::Delay, pac, prelude::*};
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// Halt the MCU when panic
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#[allow(unused_imports)]
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use panic_halt;
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mod seq;
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pub use seq::{LayerSelect, SeqLayer, Sequencer};
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#[entry]
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fn main() -> ! {
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// Grab handles for the underlying hardware objects
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let dp = pac::Peripherals::take().unwrap();
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let cp = cortex_m::Peripherals::take().unwrap();
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// Initialise GPIOC via the HAL
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let mut rcc = dp.RCC.constrain();
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let mut gpioa = dp.GPIOA.split(&mut rcc.apb2);
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let mut gpiob = dp.GPIOB.split(&mut rcc.apb2);
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// Create an LED output
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let mut led1 = gpioa.pa1.into_push_pull_output(&mut gpioa.crl);
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let mut led2 = gpioa.pa2.into_push_pull_output(&mut gpioa.crl);
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let mut led3 = gpioa.pa3.into_push_pull_output(&mut gpioa.crl);
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let mut led4 = gpioa.pa4.into_push_pull_output(&mut gpioa.crl);
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// Create a button input
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let btn1 = gpiob.pb0.into_pull_down_input(&mut gpiob.crl);
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let btn2 = gpiob.pb1.into_pull_down_input(&mut gpiob.crl);
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let btn3 = gpiob.pb2.into_pull_down_input(&mut gpiob.crl);
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let btn4 = gpiob.pb3.into_pull_down_input(&mut gpiob.crl);
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// Initialize the delay object with the MCU frequency
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let mut flash = dp.FLASH.constrain();
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let clocks = rcc
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.cfgr
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.use_hse(8.mhz())
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.sysclk(48.mhz())
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.pclk1(24.mhz())
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.freeze(&mut flash.acr);
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let mut delay = Delay::new(cp.SYST, clocks);
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// Now go blinkenlights
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loop {
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set_led(&btn1, &mut led1);
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set_led(&btn2, &mut led2);
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set_led(&btn3, &mut led3);
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set_led(&btn4, &mut led4);
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delay.delay_ms(5_u16);
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}
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}
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fn set_led<'k, I: InputPin, O: OutputPin>(i: &'k I, o: &'k mut O) {
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if let Ok(true) = i.is_high() {
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o.set_low().ok();
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} else {
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o.set_high().ok();
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}
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}
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