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use crate::reg::prelude::*;
use drone_core::reg;

reg! {
    /// SysTick control and status register.
    pub mod STK CTRL;
    0xE000_E010 0x20 0x0000_0000
    RReg WReg;
    /// Returns `true` if timer counted to `0` since last time this was read.
    COUNTFLAG { 16 1 RRRegField WWRegField }
    /// Clock source selection.
    CLKSOURCE { 2 1 RRRegField WWRegField }
    /// SysTick exception request enable.
    TICKINT { 1 1 RRRegField WWRegField }
    /// Counter enable.
    ENABLE { 0 1 RRRegField WWRegField }
}

reg! {
    /// SysTick reload value register.
    pub mod STK LOAD;
    0xE000_E014 0x20 0x0000_0000
    RReg WReg;
    /// RELOAD value.
    RELOAD { 0 24 RRRegField WWRegField }
}

reg! {
    /// SysTick current value register.
    pub mod STK VAL;
    0xE000_E018 0x20 0x0000_0000
    RReg WReg;
    /// Current counter value.
    CURRENT { 0 24 RRRegField WWRegField }
}

reg! {
    /// SysTick calibration value register.
    pub mod STK CALIB;
    0xE000_E01C 0x20 0x0000_0000
    RReg RoReg;
    /// NOREF flag.
    NOREF { 31 1 RRRegField RoRRegField }
    /// SKEW flag.
    SKEW { 30 1 RRRegField RoRRegField }
    /// Calibration value.
    TENMS { 0 24 RRRegField RoRRegField }
}