#![allow(unused)]

use core::fmt;

mod regs;
pub use regs::RegisterBlock;

pub struct Uart {
    regs: &'static mut RegisterBlock,
}

impl Uart {
    pub fn uart0() -> Self {
        let uart_rst_ctrl = super::slcr::UartRstCtrl::new();
        uart_rst_ctrl.reset_uart0();
        // TODO: Route UART 0 RxD/TxD Signals to MIO Pins

        let uart_clk_ctrl = super::slcr::UartClkCtrl::new();
        uart_clk_ctrl.enable_uart0();
            
        Uart {
            regs: RegisterBlock::uart0(),
        }.init()
    }

    fn init(self) -> Self {
        self.regs.configure();
        self
    }

    pub fn write_byte(&self, v: u8) {
        while self.regs.tx_fifo_full() {}

        self.regs.write_byte(v);
    }
}

impl fmt::Write for Uart {
    fn write_str(&mut self, s: &str) -> Result<(), fmt::Error> {
        for b in s.bytes() {
            self.write_byte(b);
        }
        Ok(())
    }
}