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|
#![no_main]
#![no_std]
use cortex_m_rt::ExceptionFrame;
use cortex_m_semihosting::hio;
use panic_semihosting as _;
use stm32f1xx_hal::{
prelude::*,
pac,
i2c::{BlockingI2c, Mode},
delay::Delay,
};
use embedded_hal::digital::v2::{OutputPin, ToggleableOutputPin};
use hd44780_driver::{Cursor, CursorBlink, Display, DisplayMode, HD44780};
use si5351::{Si5351, Si5351Device};
use core::fmt::Write;
fn print(step: usize) -> Result<(), core::fmt::Error> {
let mut stdout = match hio::hstdout() {
Ok(fd) => fd,
Err(()) => return Err(core::fmt::Error),
};
let language = "Rust";
let ranking = 1;
write!(stdout, "{}: {} on embedded is #{}!\n", step, language, ranking)?;
Ok(())
}
#[cortex_m_rt::entry]
fn main() -> ! {
let cp = cortex_m::Peripherals::take().unwrap();
let dp = pac::Peripherals::take().unwrap();
let mut flash = dp.FLASH.constrain();
let mut rcc = dp.RCC.constrain();
let mut afio = dp.AFIO.constrain(&mut rcc.apb2);
let clocks = rcc.cfgr.freeze(&mut flash.acr);
let mut delay = Delay::new(cp.SYST, clocks);
let mut gpiob = dp.GPIOB.split(&mut rcc.apb2);
// Configure PB14 as output. (LED)
let mut led = gpiob.pb14.into_push_pull_output(&mut gpiob.crh);
led.set_low().unwrap();
// Configure I2C1 to be used for Si5351 and display
let scl = gpiob.pb6.into_alternate_open_drain(&mut gpiob.crl);
let sda = gpiob.pb7.into_alternate_open_drain(&mut gpiob.crl);
let i2c = BlockingI2c::i2c1(
dp.I2C1,
(scl, sda),
&mut afio.mapr,
Mode::Standard {
frequency: 100_000.hz(),
},
clocks,
&mut rcc.apb1,
/* start_timeout_us */ 1000,
/* start_retries */ 10,
/* addr_timeout_us */ 1000,
/* data_timeout_us */ 1000,
);
let i2c_busmanager = shared_bus::CortexMBusManager::new(i2c);
/*
// Configure I2C2
let scl2 = gpiob.pb10.into_alternate_open_drain(&mut gpiob.crh);
let sda2 = gpiob.pb11.into_alternate_open_drain(&mut gpiob.crh);
let i2c2 = BlockingI2c::i2c2(
dp.I2C2,
(scl2, sda2),
Mode::Fast {
frequency: 400_000.hz(),
duty_cycle: DutyCycle::Ratio2to1,
},
clocks,
&mut rcc.apb1,
/* start_timeout_us */ 1000,
/* start_retries */ 10,
/* addr_timeout_us */ 1000,
/* data_timeout_us */ 1000,
);
*/
const I2C_ADDRESS: u8 = 0b010_0000; // MCP23008, depending on solder bridges
let mut lcd = match HD44780::new_i2c_mcp23008(i2c_busmanager.acquire(), I2C_ADDRESS, &mut delay) {
Ok(lcd) => lcd,
Err(_) => panic!("HD44780 init fail"),
};
lcd.reset(&mut delay).unwrap();
lcd.clear(&mut delay).unwrap();
lcd.set_display_mode(
DisplayMode {
display: Display::On,
cursor_visibility: Cursor::Invisible,
cursor_blink: CursorBlink::Off,
},
&mut delay).unwrap();
lcd.set_cursor_pos(0, &mut delay).unwrap();
lcd.write_str("Hello, world!", &mut delay).unwrap();
let ref_clock = 25_000_000;
let mut siclock = Si5351Device::new(i2c_busmanager.acquire(), false, ref_clock);
siclock.init(si5351::CrystalLoad::_10).unwrap();
siclock.set_frequency(si5351::PLL::B, si5351::ClockOutput::Clk0, 28_000_000 + 4_915_200).unwrap();
siclock.set_frequency(si5351::PLL::A, si5351::ClockOutput::Clk1, 144_000_000 + 28_000_000).unwrap();
siclock.set_frequency(si5351::PLL::A, si5351::ClockOutput::Clk2, 4_915_100).unwrap();
lcd.set_cursor_pos(0, &mut delay).unwrap();
lcd.write_str("Clocks set. ", &mut delay).unwrap();
let mut step = 0;
print(step).unwrap();
loop {
led.toggle().unwrap();
delay.delay_ms(600u32);
lcd.set_cursor_pos(40, &mut delay).unwrap();
let mut string = arrayvec::ArrayString::<[_; 16]>::new();
write!(string, "Step {} ", step).unwrap();
lcd.write_str(&string, &mut delay).unwrap();
step += 1;
}
}
#[cortex_m_rt::exception]
fn HardFault(ef: &ExceptionFrame) -> ! {
let periph = unsafe { cortex_m::Peripherals::steal() };
let hfsr = periph.SCB.hfsr.read();
let cfsr = periph.SCB.cfsr.read();
let mut stdout = match hio::hstdout() {
Ok(fd) => fd,
Err(()) => panic!("no stdout"),
};
let _ = write!(stdout, "Hardfault {:x} {:x} at {:x}\n", hfsr, cfsr, ef.pc);
cortex_m::asm::bkpt();
loop { }
}
#[cortex_m_rt::exception]
fn DefaultHandler(irqn: i16) {
let mut stdout = match hio::hstdout() {
Ok(fd) => fd,
Err(()) => panic!("no stdout"),
};
let _ = write!(stdout, "Unhandled exception (IRQn = {})", irqn);
cortex_m::asm::bkpt();
loop { }
}
/* code to discover i2c device address
let mut stdout = hio::hstdout().unwrap();
loop {
for addr in 0..127usize {
let bytes = [0u8; 1];
let mut buffer = [0u8; 1];
match i2c.write_read(addr as u8, &bytes, &mut buffer) {
Ok(()) => {
write!(stdout, "{}: {}\n", addr, buffer[0]).unwrap();
},
Err(_) => {
write!(stdout, "{}: fail\n", addr).unwrap();
},
}
}
}
*/
|
