diff options
Diffstat (limited to 'src/main.rs')
| -rw-r--r-- | src/main.rs | 144 |
1 files changed, 77 insertions, 67 deletions
diff --git a/src/main.rs b/src/main.rs index 8de0ba5..a98b250 100644 --- a/src/main.rs +++ b/src/main.rs @@ -13,6 +13,8 @@ mod i2c; mod ds3231; mod at24c; +const SYNC_PERIOD: u8 = 10; + struct ShiftRegister<'a> { gpioa: &'a gpioa::RegisterBlock, width: u8, @@ -25,14 +27,28 @@ struct Clock { reset: u8 } -const RESET_PERIOD: u8 = 10; -static mut SR: Option<ShiftRegister> = None; -static mut I2C: Option<i2c::I2C> = None; -static mut RTC: Option<ds3231::DS3231> = None; -static mut ROM: Option<at24c::AT24C> = None; -static mut DIGITS: [u8; 6] = [0; 6]; -static mut TIME: Clock = Clock{sec: 0, min: 0, hr: 0, reset: 0}; -static mut PERIP: Option<Peripherals> = None; +struct GlobalState { + disp: Option<ShiftRegister<'static>>, + i2c: Option<i2c::I2C<'static>>, + i2c_inited: bool, + buff: [u8; 6], + time: Clock, + perip: Option<Peripherals<'static>>, + bs: bool +} + +static mut GS: GlobalState = + GlobalState{disp: None, + i2c: None, + i2c_inited: false, + buff: [0; 6], + time: Clock{sec: 0, min: 0, hr: 0, reset: 0}, + perip: None, + bs: false}; + +fn get_gs() -> &'static mut GlobalState { + unsafe {&mut GS} +} fn digits2bcds(digs: &[u8]) -> u32 { let mut res: u32 = 0; @@ -42,53 +58,53 @@ fn digits2bcds(digs: &[u8]) -> u32 { res } -fn digits_countup() { - unsafe { - SR.as_ref().unwrap().output_bits(digits2bcds(&DIGITS[..])); - let mut i = 0; - let mut carry = 1; - while carry > 0 && i < DIGITS.len() { - DIGITS[i] += carry; - carry = if DIGITS[i] > 9 {DIGITS[i] = 0; 1} else {0}; - i += 1; - } - } +fn display() { + let gs = get_gs(); + gs.disp.as_ref().unwrap().output_bits(digits2bcds(&gs.buff[..])); } -fn refresh_clock() { - unsafe { - SR.as_ref().unwrap().output_bits(digits2bcds(&DIGITS[..])); +fn digits_countup() { + let gs = get_gs(); + let mut digits = gs.buff; + gs.disp.as_ref().unwrap().output_bits(digits2bcds(&digits[..])); + let mut i = 0; + let mut carry = 1; + while carry > 0 && i < digits.len() { + digits[i] += carry; + carry = if digits[i] > 9 {digits[i] = 0; 1} else {0}; + i += 1; } } fn render_clock() { - unsafe { - if bs { - DIGITS[1] = TIME.sec / 10; DIGITS[0] = TIME.sec - DIGITS[1] * 10; - DIGITS[3] = TIME.min / 10; DIGITS[2] = TIME.min - DIGITS[3] * 10; - DIGITS[5] = TIME.hr / 10; DIGITS[4] = TIME.hr - DIGITS[5] * 10; - } else { - for i in &mut DIGITS { - *i = 0xf; - } + let gs = get_gs(); + let mut digits = gs.buff; + let time = &gs.time; + if gs.bs { + digits[1] = time.sec / 10; digits[0] = time.sec - digits[1] * 10; + digits[3] = time.min / 10; digits[2] = time.min - digits[3] * 10; + digits[5] = time.hr / 10; digits[4] = time.hr - digits[5] * 10; + } else { + for i in &mut digits { + *i = 0xf; } } } fn update_clock() { - unsafe { - if RTC.is_none() {return} - if !TIME.tick() { - let ds3231::Date{second: sec, - minute: min, - hour: hr, ..} = RTC.as_ref().unwrap() - .read_fulldate(); - TIME = Clock{sec, min, hr, - reset: RESET_PERIOD}; - } + let gs = get_gs(); + let p = gs.perip.as_ref().unwrap(); + let rtc = ds3231::DS3231(gs.i2c.as_ref().unwrap()); + if !gs.i2c_inited {return} + if !gs.time.tick() { + let ds3231::Date{second: sec, + minute: min, + hour: hr, ..} = rtc.read_fulldate(); + gs.time = Clock{sec, min, hr, + reset: SYNC_PERIOD}; } render_clock(); - refresh_clock(); + display(); } fn systick_handler() { @@ -96,21 +112,18 @@ fn systick_handler() { update_clock(); } -static mut bs: bool = false; - fn exti3_handler() { - let p = unsafe {PERIP.as_ref().unwrap()}; + let gs = get_gs(); + let p = gs.perip.as_ref().unwrap(); p.EXTI.pr.write(|w| w.pr3().set_bit()); let x = p.GPIOA.idr.read().idr3().bit(); - unsafe { - if !x && !bs { - bs = true; - } else if x && bs { - bs = false; - } + if !x && !gs.bs { + gs.bs = true; + } else if x && gs.bs { + gs.bs = false; } render_clock(); - refresh_clock(); + display(); } exception!(SYS_TICK, systick_handler); @@ -168,9 +181,10 @@ impl Clock { } fn init() { - let p = unsafe { - PERIP = Some(Peripherals::all()); - PERIP.as_ref().unwrap() + let gs = get_gs(); + let p = { + gs.perip = Some(unsafe {Peripherals::all()}); + gs.perip.as_ref().unwrap() }; p.SYST.set_clock_source(SystClkSource::Core); @@ -211,21 +225,17 @@ fn init() { p.EXTI.ftsr.write(|w| w.tr3().set_bit()); - unsafe { - I2C = Some(i2c::I2C::new(p.I2C1)); - let i2c = I2C.as_ref().unwrap(); - RTC = Some(ds3231::DS3231::new(i2c)); - ROM = Some(at24c::AT24C::new(i2c)); - SR = Some(ShiftRegister::new(p.GPIOA, 24)); - - i2c.init(p.RCC, 0x01, 400_000, i2c::DutyType::DUTY1, true); - //i2c.init(0x01, 100_000, i2c::DutyType::DUTY1, false); - SR.as_ref().unwrap().output_bits(0); - } + gs.i2c = Some(i2c::I2C(p.I2C1)); + gs.disp = Some(ShiftRegister::new(p.GPIOA, 24)); + gs.i2c.as_ref().unwrap().init(p.RCC, 0x01, 400_000, i2c::DutyType::DUTY1, true); + //i2c.init(0x01, 100_000, i2c::DutyType::DUTY1, false); + gs.disp.as_ref().unwrap().output_bits(0); } fn set_clock() { - let rtc = unsafe {RTC.as_ref().unwrap()}; + let gs = get_gs(); + let p = gs.perip.as_ref().unwrap(); + let rtc = ds3231::DS3231(gs.i2c.as_ref().unwrap()); rtc.write_fulldate(&ds3231::Date{second: 30, minute: 23, hour: 18, |