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use crate::*;
pub struct SystemDevice {
/// Name and version of this system.
pub name: StringBuffer,
/// Authors of this system.
pub authors: StringBuffer,
/// Mask of all devices permitted to wake from sleep.
pub wake_mask: u16,
/// Slot number of device that most recently woke the system.
pub wake_slot: u8,
/// True if the system has been put to sleep.
pub asleep: bool,
/// Mask of all connected devices.
pub connected_devices: u16,
/// Name of the first custom device.
pub custom1: StringBuffer,
/// Name of the second custom device.
pub custom2: StringBuffer,
/// Name of the third custom device.
pub custom3: StringBuffer,
/// Name of the fourth custom device.
pub custom4: StringBuffer,
}
impl Device for SystemDevice {
fn read(&mut self, port: u8) -> u8 {
match port {
0x0 => 0x00,
0x1 => 0x00,
0x2 => self.wake_slot,
0x3 => 0x00,
0x4 => self.custom1.read(),
0x5 => self.custom2.read(),
0x6 => self.custom3.read(),
0x7 => self.custom4.read(),
0x8 => self.name.read(),
0x9 => self.authors.read(),
0xA => 0x00,
0xB => 0x00,
0xC => 0x00,
0xD => 0x00,
0xE => read_h!(self.connected_devices),
0xF => read_l!(self.connected_devices),
_ => unreachable!(),
}
}
fn write(&mut self, port: u8, value: u8) -> Option<Signal> {
match port {
0x0 => write_h!(self.wake_mask, value),
0x1 => {
write_l!(self.wake_mask, value);
self.asleep = true;
return Some(Signal::Sleep);
}
0x2 => (),
0x3 => match value {
0 => return Some(Signal::Reset),
_ => return Some(Signal::Fork),
}
0x4 => self.custom1.restart(),
0x5 => self.custom2.restart(),
0x6 => self.custom3.restart(),
0x7 => self.custom4.restart(),
0x8 => self.name.restart(),
0x9 => self.authors.restart(),
0xA => (),
0xB => (),
0xC => (),
0xD => (),
0xE => (),
0xF => (),
_ => unreachable!(),
};
return None;
}
fn wake(&mut self) -> bool {
true
}
fn reset(&mut self) {
self.wake_mask = 0;
self.wake_slot = 0;
self.custom1.restart();
self.custom2.restart();
self.custom3.restart();
self.custom4.restart();
self.name.restart();
self.authors.restart();
}
}
impl SystemDevice {
pub fn new(connected_devices: u16) -> Self {
let pkg_name = env!("CARGO_PKG_NAME");
let pkg_version = env!("CARGO_PKG_VERSION");
let pkg_authors = env!("CARGO_PKG_AUTHORS");
let name = format!("{pkg_name}/{pkg_version}");
let authors = pkg_authors.replace(':', "\n");
Self {
name: StringBuffer::from_str(&name),
authors: StringBuffer::from_str(&authors),
wake_mask: 0,
wake_slot: 0,
asleep: false,
connected_devices,
custom1: StringBuffer::new(),
custom2: StringBuffer::new(),
custom3: StringBuffer::new(),
custom4: StringBuffer::new(),
}
}
}
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