82 lines
2.4 KiB
Rust
82 lines
2.4 KiB
Rust
#![deny(unsafe_code)]
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#![no_std]
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#![no_main]
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use panic_halt as _;
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use cortex_m_semihosting::hprintln; // logs messages to the host; requires a debugger
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use nb::block;
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use stm32f1xx_hal::{
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prelude::*,
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pac,
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i2c,
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timer::Timer,
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};
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use cortex_m_rt::entry;
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use embedded_hal::digital::v2::OutputPin;
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mod si5153;
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#[entry]
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fn main() -> ! {
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// Get access to the core peripherals from the cortex-m crate
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let cp = cortex_m::Peripherals::take().unwrap();
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// Get access to the device specific peripherals from the peripheral access crate
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let dp = pac::Peripherals::take().unwrap();
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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 = dp.FLASH.constrain();
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let mut rcc = dp.RCC.constrain();
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let mut afio = dp.AFIO.constrain(&mut rcc.apb2);
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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.cfgr.freeze(&mut flash.acr);
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// Acquire the GPIOC peripheral
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let mut gpioc = dp.GPIOC.split(&mut rcc.apb2);
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let mut gpiob = dp.GPIOB.split(&mut rcc.apb2);
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let scl = gpiob.pb6.into_alternate_open_drain(&mut gpiob.crl);
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let sda = gpiob.pb7.into_alternate_open_drain(&mut gpiob.crl);
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let mut i2c = i2c::BlockingI2c::i2c1(dp.I2C1, (scl, sda),
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&mut afio.mapr,
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i2c::Mode::Standard{frequency: 400_000},
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clocks,
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&mut rcc.apb1,
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5,
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1,
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5,
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5);
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hprintln!("I2C setup").unwrap();
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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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let mut led = gpioc.pc13.into_push_pull_output(&mut gpioc.crh);
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// Configure the syst timer to trigger an update every second
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let mut timer = Timer::syst(cp.SYST, 1.hz(), clocks);
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let mut si_pll = si5153::Si5153::new(&i2c);
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si_pll.init(&mut i2c, 25000000, 800000000, 500000000);
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si_pll.set_ms_source(&mut i2c, si5153::Multisynth::MS0, si5153::PLL::A);
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si_pll.set_ms_freq(&mut i2c, si5153::Multisynth::MS0, 7_000_000);
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si_pll.enable_ms_output(&mut i2c, si5153::Multisynth::MS0);
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// Wait for the timer to trigger an update and change the state of the LED
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loop {
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block!(timer.wait()).unwrap();
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led.set_high().unwrap();
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block!(timer.wait()).unwrap();
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led.set_low().unwrap();
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}
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}
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